8031759: Improved tool overriding in configure
authorihse
Wed, 29 Jan 2014 11:21:54 +0100
changeset 22475 777928354ad9
parent 22474 83fec92ec43d
child 22476 5adfe6618462
8031759: Improved tool overriding in configure Reviewed-by: tbell, mduigou, erikj
common/autoconf/basics.m4
common/autoconf/configure
common/autoconf/generated-configure.sh
common/autoconf/toolchain.m4
--- a/common/autoconf/basics.m4	Wed Jan 29 11:04:37 2014 +0100
+++ b/common/autoconf/basics.m4	Wed Jan 29 11:21:54 2014 +0100
@@ -236,35 +236,119 @@
 
 # Test that variable $1 denoting a program is not empty. If empty, exit with an error.
 # $1: variable to check
-# $2: executable name to print in warning (optional)
 AC_DEFUN([BASIC_CHECK_NONEMPTY],
 [
   if test "x[$]$1" = x; then
-    if test "x$2" = x; then
-      PROG_NAME=translit($1,A-Z,a-z)
-    else
-      PROG_NAME=$2
-    fi
-    AC_MSG_NOTICE([Could not find $PROG_NAME!])
-    AC_MSG_ERROR([Cannot continue])
+    AC_MSG_ERROR([Could not find required tool for $1])
+  fi
+])
+
+# Check that there are no unprocessed overridden variables left.
+# If so, they are an incorrect argument and we will exit with an error.
+AC_DEFUN([BASIC_CHECK_LEFTOVER_OVERRIDDEN],
+[
+  if test "x$CONFIGURE_OVERRIDDEN_VARIABLES" != x; then
+    # Replace the separating ! with spaces before presenting for end user.
+    unknown_variables=${CONFIGURE_OVERRIDDEN_VARIABLES//!/ }
+    AC_MSG_ERROR([The following variables are unknown to configure: $unknown_variables])
   fi
 ])
 
-# Does AC_PATH_PROG followed by BASIC_CHECK_NONEMPTY.
-# Arguments as AC_PATH_PROG:
+# Setup a tool for the given variable. If correctly specified by the user, 
+# use that value, otherwise search for the tool using the supplied code snippet.
 # $1: variable to set
-# $2: executable name to look for
-AC_DEFUN([BASIC_REQUIRE_PROG],
+# $2: code snippet to call to look for the tool
+AC_DEFUN([BASIC_SETUP_TOOL],
 [
-  AC_PATH_PROGS($1, $2)
-  BASIC_CHECK_NONEMPTY($1, $2)
+  # Publish this variable in the help.
+  AC_ARG_VAR($1, [Override default value for $1])
+
+  if test "x[$]$1" = x; then
+    # The variable is not set by user, try to locate tool using the code snippet
+    $2
+  else
+    # The variable is set, but is it from the command line or the environment?
+
+    # Try to remove the string !$1! from our list.
+    try_remove_var=${CONFIGURE_OVERRIDDEN_VARIABLES//!$1!/}
+    if test "x$try_remove_var" = "x$CONFIGURE_OVERRIDDEN_VARIABLES"; then
+      # If it failed, the variable was not from the command line. Ignore it,
+      # but warn the user (except for BASH, which is always set by the calling BASH).
+      if test "x$1" != xBASH; then
+        AC_MSG_WARN([Ignoring value of $1 from the environment. Use command line variables instead.])
+      fi
+      # Try to locate tool using the code snippet
+      $2
+    else
+      # If it succeeded, then it was overridden by the user. We will use it
+      # for the tool.
+
+      # First remove it from the list of overridden variables, so we can test
+      # for unknown variables in the end.
+      CONFIGURE_OVERRIDDEN_VARIABLES="$try_remove_var"
+
+      # Check if the provided tool contains a complete path.
+      tool_specified="[$]$1"
+      tool_basename="${tool_specified##*/}"
+      if test "x$tool_basename" = "x$tool_specified"; then
+        # A command without a complete path is provided, search $PATH.
+        AC_MSG_NOTICE([Will search for user supplied tool $1=$tool_basename])
+        AC_PATH_PROG($1, $tool_basename)
+        if test "x[$]$1" = x; then
+          AC_MSG_ERROR([User supplied tool $tool_basename could not be found])
+        fi
+      else
+        # Otherwise we believe it is a complete path. Use it as it is.
+        AC_MSG_NOTICE([Will use user supplied tool $1=$tool_specified])
+        AC_MSG_CHECKING([for $1])
+        if test ! -x "$tool_specified"; then
+          AC_MSG_RESULT([not found])
+          AC_MSG_ERROR([User supplied tool $1=$tool_specified does not exist or is not executable])
+        fi
+        AC_MSG_RESULT([$tool_specified])
+      fi
+    fi
+  fi
+])
+
+# Call BASIC_SETUP_TOOL with AC_PATH_PROGS to locate the tool
+# $1: variable to set
+# $2: executable name (or list of names) to look for
+AC_DEFUN([BASIC_PATH_PROGS],
+[
+  BASIC_SETUP_TOOL($1, [AC_PATH_PROGS($1, $2)])
+])
+
+# Call BASIC_SETUP_TOOL with AC_CHECK_TOOLS to locate the tool
+# $1: variable to set
+# $2: executable name (or list of names) to look for
+AC_DEFUN([BASIC_CHECK_TOOLS],
+[
+  BASIC_SETUP_TOOL($1, [AC_CHECK_TOOLS($1, $2)])
+])
+
+# Like BASIC_PATH_PROGS but fails if no tool was found.
+# $1: variable to set
+# $2: executable name (or list of names) to look for
+AC_DEFUN([BASIC_REQUIRE_PROGS],
+[
+  BASIC_PATH_PROGS($1, $2)
+  BASIC_CHECK_NONEMPTY($1)
+])
+
+# Like BASIC_SETUP_TOOL but fails if no tool was found.
+# $1: variable to set
+# $2: autoconf macro to call to look for the special tool
+AC_DEFUN([BASIC_REQUIRE_SPECIAL],
+[
+  BASIC_SETUP_TOOL($1, [$2])
+  BASIC_CHECK_NONEMPTY($1)
 ])
 
 # Setup the most fundamental tools that relies on not much else to set up,
 # but is used by much of the early bootstrap code.
 AC_DEFUN_ONCE([BASIC_SETUP_FUNDAMENTAL_TOOLS],
 [
-
   # Start with tools that do not need have cross compilation support
   # and can be expected to be found in the default PATH. These tools are
   # used by configure. Nor are these tools expected to be found in the
@@ -272,57 +356,50 @@
   # needed to download the devkit.
 
   # First are all the simple required tools.
-  BASIC_REQUIRE_PROG(BASENAME, basename)
-  BASIC_REQUIRE_PROG(BASH, bash)
-  BASIC_REQUIRE_PROG(CAT, cat)
-  BASIC_REQUIRE_PROG(CHMOD, chmod)
-  BASIC_REQUIRE_PROG(CMP, cmp)
-  BASIC_REQUIRE_PROG(COMM, comm)
-  BASIC_REQUIRE_PROG(CP, cp)
-  BASIC_REQUIRE_PROG(CPIO, cpio)
-  BASIC_REQUIRE_PROG(CUT, cut)
-  BASIC_REQUIRE_PROG(DATE, date)
-  BASIC_REQUIRE_PROG(DIFF, [gdiff diff])
-  BASIC_REQUIRE_PROG(DIRNAME, dirname)
-  BASIC_REQUIRE_PROG(ECHO, echo)
-  BASIC_REQUIRE_PROG(EXPR, expr)
-  BASIC_REQUIRE_PROG(FILE, file)
-  BASIC_REQUIRE_PROG(FIND, find)
-  BASIC_REQUIRE_PROG(HEAD, head)
-  BASIC_REQUIRE_PROG(LN, ln)
-  BASIC_REQUIRE_PROG(LS, ls)
-  BASIC_REQUIRE_PROG(MKDIR, mkdir)
-  BASIC_REQUIRE_PROG(MKTEMP, mktemp)
-  BASIC_REQUIRE_PROG(MV, mv)
-  BASIC_REQUIRE_PROG(PRINTF, printf)
-  BASIC_REQUIRE_PROG(RM, rm)
-  BASIC_REQUIRE_PROG(SH, sh)
-  BASIC_REQUIRE_PROG(SORT, sort)
-  BASIC_REQUIRE_PROG(TAIL, tail)
-  BASIC_REQUIRE_PROG(TAR, tar)
-  BASIC_REQUIRE_PROG(TEE, tee)
-  BASIC_REQUIRE_PROG(TOUCH, touch)
-  BASIC_REQUIRE_PROG(TR, tr)
-  BASIC_REQUIRE_PROG(UNAME, uname)
-  BASIC_REQUIRE_PROG(UNIQ, uniq)
-  BASIC_REQUIRE_PROG(WC, wc)
-  BASIC_REQUIRE_PROG(WHICH, which)
-  BASIC_REQUIRE_PROG(XARGS, xargs)
+  BASIC_REQUIRE_PROGS(BASENAME, basename)
+  BASIC_REQUIRE_PROGS(BASH, bash)
+  BASIC_REQUIRE_PROGS(CAT, cat)
+  BASIC_REQUIRE_PROGS(CHMOD, chmod)
+  BASIC_REQUIRE_PROGS(CMP, cmp)
+  BASIC_REQUIRE_PROGS(COMM, comm)
+  BASIC_REQUIRE_PROGS(CP, cp)
+  BASIC_REQUIRE_PROGS(CPIO, cpio)
+  BASIC_REQUIRE_PROGS(CUT, cut)
+  BASIC_REQUIRE_PROGS(DATE, date)
+  BASIC_REQUIRE_PROGS(DIFF, [gdiff diff])
+  BASIC_REQUIRE_PROGS(DIRNAME, dirname)
+  BASIC_REQUIRE_PROGS(ECHO, echo)
+  BASIC_REQUIRE_PROGS(EXPR, expr)
+  BASIC_REQUIRE_PROGS(FILE, file)
+  BASIC_REQUIRE_PROGS(FIND, find)
+  BASIC_REQUIRE_PROGS(HEAD, head)
+  BASIC_REQUIRE_PROGS(LN, ln)
+  BASIC_REQUIRE_PROGS(LS, ls)
+  BASIC_REQUIRE_PROGS(MKDIR, mkdir)
+  BASIC_REQUIRE_PROGS(MKTEMP, mktemp)
+  BASIC_REQUIRE_PROGS(MV, mv)
+  BASIC_REQUIRE_PROGS(NAWK, [nawk gawk awk])
+  BASIC_REQUIRE_PROGS(PRINTF, printf)
+  BASIC_REQUIRE_PROGS(RM, rm)
+  BASIC_REQUIRE_PROGS(SH, sh)
+  BASIC_REQUIRE_PROGS(SORT, sort)
+  BASIC_REQUIRE_PROGS(TAIL, tail)
+  BASIC_REQUIRE_PROGS(TAR, tar)
+  BASIC_REQUIRE_PROGS(TEE, tee)
+  BASIC_REQUIRE_PROGS(TOUCH, touch)
+  BASIC_REQUIRE_PROGS(TR, tr)
+  BASIC_REQUIRE_PROGS(UNAME, uname)
+  BASIC_REQUIRE_PROGS(UNIQ, uniq)
+  BASIC_REQUIRE_PROGS(WC, wc)
+  BASIC_REQUIRE_PROGS(WHICH, which)
+  BASIC_REQUIRE_PROGS(XARGS, xargs)
 
   # Then required tools that require some special treatment.
-  AC_PROG_AWK
-  BASIC_CHECK_NONEMPTY(AWK)
-  AC_PROG_GREP
-  BASIC_CHECK_NONEMPTY(GREP)
-  AC_PROG_EGREP
-  BASIC_CHECK_NONEMPTY(EGREP)
-  AC_PROG_FGREP
-  BASIC_CHECK_NONEMPTY(FGREP)
-  AC_PROG_SED
-  BASIC_CHECK_NONEMPTY(SED)
-
-  AC_PATH_PROGS(NAWK, [nawk gawk awk])
-  BASIC_CHECK_NONEMPTY(NAWK)
+  BASIC_REQUIRE_SPECIAL(AWK, [AC_PROG_AWK])
+  BASIC_REQUIRE_SPECIAL(GREP, [AC_PROG_GREP])
+  BASIC_REQUIRE_SPECIAL(EGREP, [AC_PROG_EGREP])
+  BASIC_REQUIRE_SPECIAL(FGREP, [AC_PROG_FGREP])
+  BASIC_REQUIRE_SPECIAL(SED, [AC_PROG_SED])
 
   # Always force rm.
   RM="$RM -f"
@@ -332,10 +409,10 @@
   THEPWDCMD=pwd
 
   # These are not required on all platforms
-  AC_PATH_PROG(CYGPATH, cygpath)
-  AC_PATH_PROG(READLINK, readlink)
-  AC_PATH_PROG(DF, df)
-  AC_PATH_PROG(SETFILE, SetFile)
+  BASIC_PATH_PROGS(CYGPATH, cygpath)
+  BASIC_PATH_PROGS(READLINK, [greadlink readlink])
+  BASIC_PATH_PROGS(DF, df)
+  BASIC_PATH_PROGS(SETFILE, SetFile)
 ])
 
 # Setup basic configuration paths, and platform-specific stuff related to PATHs.
@@ -622,26 +699,26 @@
 
   # These tools might not be installed by default,
   # need hint on how to install them.
-  BASIC_REQUIRE_PROG(UNZIP, unzip)
-  BASIC_REQUIRE_PROG(ZIP, zip)
+  BASIC_REQUIRE_PROGS(UNZIP, unzip)
+  BASIC_REQUIRE_PROGS(ZIP, zip)
 
   # Non-required basic tools
 
-  AC_PATH_PROG(LDD, ldd)
+  BASIC_PATH_PROGS(LDD, ldd)
   if test "x$LDD" = "x"; then
     # List shared lib dependencies is used for
     # debug output and checking for forbidden dependencies.
     # We can build without it.
     LDD="true"
   fi
-  AC_PATH_PROG(OTOOL, otool)
+  BASIC_PATH_PROGS(OTOOL, otool)
   if test "x$OTOOL" = "x"; then
     OTOOL="true"
   fi
-  AC_PATH_PROGS(READELF, [readelf greadelf])
-  AC_PATH_PROG(HG, hg)
-  AC_PATH_PROG(STAT, stat)
-  AC_PATH_PROG(TIME, time)
+  BASIC_PATH_PROGS(READELF, [greadelf readelf])
+  BASIC_PATH_PROGS(HG, hg)
+  BASIC_PATH_PROGS(STAT, stat)
+  BASIC_PATH_PROGS(TIME, time)
   # Check if it's GNU time
   IS_GNU_TIME=`$TIME --version 2>&1 | $GREP 'GNU time'`
   if test "x$IS_GNU_TIME" != x; then
@@ -652,13 +729,13 @@
   AC_SUBST(IS_GNU_TIME)
 
   if test "x$OPENJDK_TARGET_OS" = "xwindows"; then
-    BASIC_REQUIRE_PROG(COMM, comm)
+    BASIC_REQUIRE_PROGS(COMM, comm)
   fi
 
   if test "x$OPENJDK_TARGET_OS" = "xmacosx"; then
-    BASIC_REQUIRE_PROG(DSYMUTIL, dsymutil)
-    BASIC_REQUIRE_PROG(XATTR, xattr)
-    AC_PATH_PROG(CODESIGN, codesign)
+    BASIC_REQUIRE_PROGS(DSYMUTIL, dsymutil)
+    BASIC_REQUIRE_PROGS(XATTR, xattr)
+    BASIC_PATH_PROGS(CODESIGN, codesign)
     if test "x$CODESIGN" != "x"; then
       # Verify that the openjdk_codesign certificate is present
       AC_MSG_CHECKING([if openjdk_codesign certificate is present])
@@ -720,6 +797,9 @@
 
 AC_DEFUN_ONCE([BASIC_TEST_USABILITY_ISSUES],
 [
+  # Did user specify any unknown variables?
+  BASIC_CHECK_LEFTOVER_OVERRIDDEN
+
   AC_MSG_CHECKING([if build directory is on local disk])
   BASIC_CHECK_DIR_ON_LOCAL_DISK($OUTPUT_ROOT,
       [OUTPUT_DIR_IS_LOCAL="yes"],
--- a/common/autoconf/configure	Wed Jan 29 11:04:37 2014 +0100
+++ b/common/autoconf/configure	Wed Jan 29 11:21:54 2014 +0100
@@ -121,15 +121,23 @@
   case $conf_option in
     --openjdk-target=*)
       conf_openjdk_target=`expr "X$conf_option" : '[^=]*=\(.*\)'`
-      continue ;;
+      ;;
     --debug-configure)
       if test "x$conf_debug_configure" != xrecursive; then
         conf_debug_configure=true
         export conf_debug_configure
       fi
-      continue ;;
+      ;;
+    [^-]*=*)
+      # Add name of variable to CONFIGURE_OVERRIDDEN_VARIABLES list inside !...!.
+      conf_env_var=`expr "x$conf_option" : 'x\([^=]*\)='`
+      CONFIGURE_OVERRIDDEN_VARIABLES="$CONFIGURE_OVERRIDDEN_VARIABLES!$conf_env_var!"
+      # ... and then process argument as usual
+      conf_processed_arguments=("${conf_processed_arguments[@]}" "$conf_option")
+      ;;
     *)
-      conf_processed_arguments=("${conf_processed_arguments[@]}" "$conf_option") ;;
+      conf_processed_arguments=("${conf_processed_arguments[@]}" "$conf_option")
+      ;;
   esac
 
   case $conf_option in
@@ -212,6 +220,9 @@
 
 Please be aware that, when cross-compiling, the OpenJDK configure script will
 generally use 'target' where autoconf traditionally uses 'host'.
+
+Also note that variables must be passed on the command line. Variables in the
+environment will generally be ignored, unlike traditional autoconf scripts.
 EOT
   fi
 else
--- a/common/autoconf/generated-configure.sh	Wed Jan 29 11:04:37 2014 +0100
+++ b/common/autoconf/generated-configure.sh	Wed Jan 29 11:21:54 2014 +0100
@@ -716,6 +716,8 @@
 OBJDUMP
 ac_ct_OBJCOPY
 OBJCOPY
+ac_ct_STRIP
+ac_ct_NM
 MCS
 STRIP
 GNM
@@ -735,6 +737,7 @@
 HOTSPOT_LD
 HOTSPOT_CXX
 ARFLAGS
+ac_ct_AR
 AR
 LDEXECXX
 LDCXX
@@ -914,7 +917,6 @@
 DF
 READLINK
 CYGPATH
-NAWK
 SED
 FGREP
 EGREP
@@ -934,6 +936,7 @@
 SH
 RM
 PRINTF
+NAWK
 MV
 MKTEMP
 MKDIR
@@ -1073,7 +1076,67 @@
       ac_precious_vars='build_alias
 host_alias
 target_alias
+BASENAME
+BASH
+CAT
+CHMOD
+CMP
+COMM
+CP
+CPIO
+CUT
+DATE
+DIFF
+DIRNAME
+ECHO
+EXPR
+FILE
+FIND
+HEAD
+LN
+LS
+MKDIR
+MKTEMP
+MV
+NAWK
+PRINTF
+RM
+SH
+SORT
+TAIL
+TAR
+TEE
+TOUCH
+TR
+UNAME
+UNIQ
+WC
+WHICH
+XARGS
+AWK
+GREP
+EGREP
+FGREP
+SED
+CYGPATH
+READLINK
+DF
+SETFILE
+UNZIP
+ZIP
+LDD
+OTOOL
+READELF
+HG
+STAT
+TIME
+DSYMUTIL
+XATTR
+CODESIGN
 PKG_CONFIG
+BUILD_CC
+BUILD_CXX
+BUILD_LD
 CC
 CFLAGS
 LDFLAGS
@@ -1084,8 +1147,18 @@
 CCC
 OBJC
 OBJCFLAGS
+AR
 CPP
 CXXCPP
+AS
+NM
+GNM
+STRIP
+MCS
+OBJCOPY
+OBJDUMP
+LIPO
+JTREGEXE
 XMKMF
 FREETYPE_CFLAGS
 FREETYPE_LIBS
@@ -1848,7 +1921,67 @@
   --with-ccache-dir       where to store ccache files [~/.ccache]
 
 Some influential environment variables:
+  BASENAME    Override default value for BASENAME
+  BASH        Override default value for BASH
+  CAT         Override default value for CAT
+  CHMOD       Override default value for CHMOD
+  CMP         Override default value for CMP
+  COMM        Override default value for COMM
+  CP          Override default value for CP
+  CPIO        Override default value for CPIO
+  CUT         Override default value for CUT
+  DATE        Override default value for DATE
+  DIFF        Override default value for DIFF
+  DIRNAME     Override default value for DIRNAME
+  ECHO        Override default value for ECHO
+  EXPR        Override default value for EXPR
+  FILE        Override default value for FILE
+  FIND        Override default value for FIND
+  HEAD        Override default value for HEAD
+  LN          Override default value for LN
+  LS          Override default value for LS
+  MKDIR       Override default value for MKDIR
+  MKTEMP      Override default value for MKTEMP
+  MV          Override default value for MV
+  NAWK        Override default value for NAWK
+  PRINTF      Override default value for PRINTF
+  RM          Override default value for RM
+  SH          Override default value for SH
+  SORT        Override default value for SORT
+  TAIL        Override default value for TAIL
+  TAR         Override default value for TAR
+  TEE         Override default value for TEE
+  TOUCH       Override default value for TOUCH
+  TR          Override default value for TR
+  UNAME       Override default value for UNAME
+  UNIQ        Override default value for UNIQ
+  WC          Override default value for WC
+  WHICH       Override default value for WHICH
+  XARGS       Override default value for XARGS
+  AWK         Override default value for AWK
+  GREP        Override default value for GREP
+  EGREP       Override default value for EGREP
+  FGREP       Override default value for FGREP
+  SED         Override default value for SED
+  CYGPATH     Override default value for CYGPATH
+  READLINK    Override default value for READLINK
+  DF          Override default value for DF
+  SETFILE     Override default value for SETFILE
+  UNZIP       Override default value for UNZIP
+  ZIP         Override default value for ZIP
+  LDD         Override default value for LDD
+  OTOOL       Override default value for OTOOL
+  READELF     Override default value for READELF
+  HG          Override default value for HG
+  STAT        Override default value for STAT
+  TIME        Override default value for TIME
+  DSYMUTIL    Override default value for DSYMUTIL
+  XATTR       Override default value for XATTR
+  CODESIGN    Override default value for CODESIGN
   PKG_CONFIG  path to pkg-config utility
+  BUILD_CC    Override default value for BUILD_CC
+  BUILD_CXX   Override default value for BUILD_CXX
+  BUILD_LD    Override default value for BUILD_LD
   CC          C compiler command
   CFLAGS      C compiler flags
   LDFLAGS     linker flags, e.g. -L<lib dir> if you have libraries in a
@@ -1860,8 +1993,18 @@
   CXXFLAGS    C++ compiler flags
   OBJC        Objective C compiler command
   OBJCFLAGS   Objective C compiler flags
+  AR          Override default value for AR
   CPP         C preprocessor
   CXXCPP      C++ preprocessor
+  AS          Override default value for AS
+  NM          Override default value for NM
+  GNM         Override default value for GNM
+  STRIP       Override default value for STRIP
+  MCS         Override default value for MCS
+  OBJCOPY     Override default value for OBJCOPY
+  OBJDUMP     Override default value for OBJDUMP
+  LIPO        Override default value for LIPO
+  JTREGEXE    Override default value for JTREGEXE
   XMKMF       Path to xmkmf, Makefile generator for X Window System
   FREETYPE_CFLAGS
               C compiler flags for FREETYPE, overriding pkg-config
@@ -3174,13 +3317,36 @@
 
 # Test that variable $1 denoting a program is not empty. If empty, exit with an error.
 # $1: variable to check
-# $2: executable name to print in warning (optional)
-
-
-# Does AC_PATH_PROG followed by BASIC_CHECK_NONEMPTY.
-# Arguments as AC_PATH_PROG:
+
+
+# Check that there are no unprocessed overridden variables left.
+# If so, they are an incorrect argument and we will exit with an error.
+
+
+# Setup a tool for the given variable. If correctly specified by the user,
+# use that value, otherwise search for the tool using the supplied code snippet.
+# $1: variable to set
+# $2: code snippet to call to look for the tool
+
+
+# Call BASIC_SETUP_TOOL with AC_PATH_PROGS to locate the tool
 # $1: variable to set
-# $2: executable name to look for
+# $2: executable name (or list of names) to look for
+
+
+# Call BASIC_SETUP_TOOL with AC_CHECK_TOOLS to locate the tool
+# $1: variable to set
+# $2: executable name (or list of names) to look for
+
+
+# Like BASIC_PATH_PROGS but fails if no tool was found.
+# $1: variable to set
+# $2: executable name (or list of names) to look for
+
+
+# Like BASIC_SETUP_TOOL but fails if no tool was found.
+# $1: variable to set
+# $2: autoconf macro to call to look for the special tool
 
 
 # Setup the most fundamental tools that relies on not much else to set up,
@@ -3868,7 +4034,7 @@
 #CUSTOM_AUTOCONF_INCLUDE
 
 # Do not change or remove the following line, it is needed for consistency checks:
-DATE_WHEN_GENERATED=1390989605
+DATE_WHEN_GENERATED=1390990903
 
 ###############################################################################
 #
@@ -3891,7 +4057,6 @@
 $as_echo "$as_me: configure script generated at timestamp $DATE_WHEN_GENERATED." >&6;}
 
 
-
   # Start with tools that do not need have cross compilation support
   # and can be expected to be found in the default PATH. These tools are
   # used by configure. Nor are these tools expected to be found in the
@@ -3900,7 +4065,72 @@
 
   # First are all the simple required tools.
 
-  for ac_prog in basename
+
+
+  # Publish this variable in the help.
+
+
+  if test "x$BASENAME" = x; then
+    # The variable is not set by user, try to locate tool using the code snippet
+    for ac_prog in basename
+do
+  # Extract the first word of "$ac_prog", so it can be a program name with args.
+set dummy $ac_prog; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_path_BASENAME+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $BASENAME in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_BASENAME="$BASENAME" # Let the user override the test with a path.
+  ;;
+  *)
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_path_BASENAME="$as_dir/$ac_word$ac_exec_ext"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+  ;;
+esac
+fi
+BASENAME=$ac_cv_path_BASENAME
+if test -n "$BASENAME"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $BASENAME" >&5
+$as_echo "$BASENAME" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+  test -n "$BASENAME" && break
+done
+
+  else
+    # The variable is set, but is it from the command line or the environment?
+
+    # Try to remove the string !BASENAME! from our list.
+    try_remove_var=${CONFIGURE_OVERRIDDEN_VARIABLES//!BASENAME!/}
+    if test "x$try_remove_var" = "x$CONFIGURE_OVERRIDDEN_VARIABLES"; then
+      # If it failed, the variable was not from the command line. Ignore it,
+      # but warn the user (except for BASH, which is always set by the calling BASH).
+      if test "xBASENAME" != xBASH; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: Ignoring value of BASENAME from the environment. Use command line variables instead." >&5
+$as_echo "$as_me: WARNING: Ignoring value of BASENAME from the environment. Use command line variables instead." >&2;}
+      fi
+      # Try to locate tool using the code snippet
+      for ac_prog in basename
 do
   # Extract the first word of "$ac_prog", so it can be a program name with args.
 set dummy $ac_prog; ac_word=$2
@@ -3945,21 +4175,97 @@
   test -n "$BASENAME" && break
 done
 
+    else
+      # If it succeeded, then it was overridden by the user. We will use it
+      # for the tool.
+
+      # First remove it from the list of overridden variables, so we can test
+      # for unknown variables in the end.
+      CONFIGURE_OVERRIDDEN_VARIABLES="$try_remove_var"
+
+      # Check if the provided tool contains a complete path.
+      tool_specified="$BASENAME"
+      tool_basename="${tool_specified##*/}"
+      if test "x$tool_basename" = "x$tool_specified"; then
+        # A command without a complete path is provided, search $PATH.
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool BASENAME=$tool_basename" >&5
+$as_echo "$as_me: Will search for user supplied tool BASENAME=$tool_basename" >&6;}
+        # Extract the first word of "$tool_basename", so it can be a program name with args.
+set dummy $tool_basename; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_path_BASENAME+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $BASENAME in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_BASENAME="$BASENAME" # Let the user override the test with a path.
+  ;;
+  *)
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_path_BASENAME="$as_dir/$ac_word$ac_exec_ext"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+  ;;
+esac
+fi
+BASENAME=$ac_cv_path_BASENAME
+if test -n "$BASENAME"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $BASENAME" >&5
+$as_echo "$BASENAME" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+        if test "x$BASENAME" = x; then
+          as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
+        fi
+      else
+        # Otherwise we believe it is a complete path. Use it as it is.
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool BASENAME=$tool_specified" >&5
+$as_echo "$as_me: Will use user supplied tool BASENAME=$tool_specified" >&6;}
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for BASENAME" >&5
+$as_echo_n "checking for BASENAME... " >&6; }
+        if test ! -x "$tool_specified"; then
+          { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
+$as_echo "not found" >&6; }
+          as_fn_error $? "User supplied tool BASENAME=$tool_specified does not exist or is not executable" "$LINENO" 5
+        fi
+        { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
+$as_echo "$tool_specified" >&6; }
+      fi
+    fi
+  fi
+
+
 
   if test "x$BASENAME" = x; then
-    if test "xbasename" = x; then
-      PROG_NAME=basename
-    else
-      PROG_NAME=basename
-    fi
-    { $as_echo "$as_me:${as_lineno-$LINENO}: Could not find $PROG_NAME!" >&5
-$as_echo "$as_me: Could not find $PROG_NAME!" >&6;}
-    as_fn_error $? "Cannot continue" "$LINENO" 5
-  fi
-
-
-
-  for ac_prog in bash
+    as_fn_error $? "Could not find required tool for BASENAME" "$LINENO" 5
+  fi
+
+
+
+
+
+  # Publish this variable in the help.
+
+
+  if test "x$BASH" = x; then
+    # The variable is not set by user, try to locate tool using the code snippet
+    for ac_prog in bash
 do
   # Extract the first word of "$ac_prog", so it can be a program name with args.
 set dummy $ac_prog; ac_word=$2
@@ -4004,21 +4310,213 @@
   test -n "$BASH" && break
 done
 
+  else
+    # The variable is set, but is it from the command line or the environment?
+
+    # Try to remove the string !BASH! from our list.
+    try_remove_var=${CONFIGURE_OVERRIDDEN_VARIABLES//!BASH!/}
+    if test "x$try_remove_var" = "x$CONFIGURE_OVERRIDDEN_VARIABLES"; then
+      # If it failed, the variable was not from the command line. Ignore it,
+      # but warn the user (except for BASH, which is always set by the calling BASH).
+      if test "xBASH" != xBASH; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: Ignoring value of BASH from the environment. Use command line variables instead." >&5
+$as_echo "$as_me: WARNING: Ignoring value of BASH from the environment. Use command line variables instead." >&2;}
+      fi
+      # Try to locate tool using the code snippet
+      for ac_prog in bash
+do
+  # Extract the first word of "$ac_prog", so it can be a program name with args.
+set dummy $ac_prog; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_path_BASH+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $BASH in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_BASH="$BASH" # Let the user override the test with a path.
+  ;;
+  *)
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_path_BASH="$as_dir/$ac_word$ac_exec_ext"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+  ;;
+esac
+fi
+BASH=$ac_cv_path_BASH
+if test -n "$BASH"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $BASH" >&5
+$as_echo "$BASH" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+  test -n "$BASH" && break
+done
+
+    else
+      # If it succeeded, then it was overridden by the user. We will use it
+      # for the tool.
+
+      # First remove it from the list of overridden variables, so we can test
+      # for unknown variables in the end.
+      CONFIGURE_OVERRIDDEN_VARIABLES="$try_remove_var"
+
+      # Check if the provided tool contains a complete path.
+      tool_specified="$BASH"
+      tool_basename="${tool_specified##*/}"
+      if test "x$tool_basename" = "x$tool_specified"; then
+        # A command without a complete path is provided, search $PATH.
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool BASH=$tool_basename" >&5
+$as_echo "$as_me: Will search for user supplied tool BASH=$tool_basename" >&6;}
+        # Extract the first word of "$tool_basename", so it can be a program name with args.
+set dummy $tool_basename; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_path_BASH+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $BASH in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_BASH="$BASH" # Let the user override the test with a path.
+  ;;
+  *)
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_path_BASH="$as_dir/$ac_word$ac_exec_ext"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+  ;;
+esac
+fi
+BASH=$ac_cv_path_BASH
+if test -n "$BASH"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $BASH" >&5
+$as_echo "$BASH" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+        if test "x$BASH" = x; then
+          as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
+        fi
+      else
+        # Otherwise we believe it is a complete path. Use it as it is.
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool BASH=$tool_specified" >&5
+$as_echo "$as_me: Will use user supplied tool BASH=$tool_specified" >&6;}
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for BASH" >&5
+$as_echo_n "checking for BASH... " >&6; }
+        if test ! -x "$tool_specified"; then
+          { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
+$as_echo "not found" >&6; }
+          as_fn_error $? "User supplied tool BASH=$tool_specified does not exist or is not executable" "$LINENO" 5
+        fi
+        { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
+$as_echo "$tool_specified" >&6; }
+      fi
+    fi
+  fi
+
+
 
   if test "x$BASH" = x; then
-    if test "xbash" = x; then
-      PROG_NAME=bash
-    else
-      PROG_NAME=bash
-    fi
-    { $as_echo "$as_me:${as_lineno-$LINENO}: Could not find $PROG_NAME!" >&5
-$as_echo "$as_me: Could not find $PROG_NAME!" >&6;}
-    as_fn_error $? "Cannot continue" "$LINENO" 5
-  fi
-
-
-
-  for ac_prog in cat
+    as_fn_error $? "Could not find required tool for BASH" "$LINENO" 5
+  fi
+
+
+
+
+
+  # Publish this variable in the help.
+
+
+  if test "x$CAT" = x; then
+    # The variable is not set by user, try to locate tool using the code snippet
+    for ac_prog in cat
+do
+  # Extract the first word of "$ac_prog", so it can be a program name with args.
+set dummy $ac_prog; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_path_CAT+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $CAT in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_CAT="$CAT" # Let the user override the test with a path.
+  ;;
+  *)
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_path_CAT="$as_dir/$ac_word$ac_exec_ext"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+  ;;
+esac
+fi
+CAT=$ac_cv_path_CAT
+if test -n "$CAT"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $CAT" >&5
+$as_echo "$CAT" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+  test -n "$CAT" && break
+done
+
+  else
+    # The variable is set, but is it from the command line or the environment?
+
+    # Try to remove the string !CAT! from our list.
+    try_remove_var=${CONFIGURE_OVERRIDDEN_VARIABLES//!CAT!/}
+    if test "x$try_remove_var" = "x$CONFIGURE_OVERRIDDEN_VARIABLES"; then
+      # If it failed, the variable was not from the command line. Ignore it,
+      # but warn the user (except for BASH, which is always set by the calling BASH).
+      if test "xCAT" != xBASH; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: Ignoring value of CAT from the environment. Use command line variables instead." >&5
+$as_echo "$as_me: WARNING: Ignoring value of CAT from the environment. Use command line variables instead." >&2;}
+      fi
+      # Try to locate tool using the code snippet
+      for ac_prog in cat
 do
   # Extract the first word of "$ac_prog", so it can be a program name with args.
 set dummy $ac_prog; ac_word=$2
@@ -4063,21 +4561,97 @@
   test -n "$CAT" && break
 done
 
+    else
+      # If it succeeded, then it was overridden by the user. We will use it
+      # for the tool.
+
+      # First remove it from the list of overridden variables, so we can test
+      # for unknown variables in the end.
+      CONFIGURE_OVERRIDDEN_VARIABLES="$try_remove_var"
+
+      # Check if the provided tool contains a complete path.
+      tool_specified="$CAT"
+      tool_basename="${tool_specified##*/}"
+      if test "x$tool_basename" = "x$tool_specified"; then
+        # A command without a complete path is provided, search $PATH.
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool CAT=$tool_basename" >&5
+$as_echo "$as_me: Will search for user supplied tool CAT=$tool_basename" >&6;}
+        # Extract the first word of "$tool_basename", so it can be a program name with args.
+set dummy $tool_basename; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_path_CAT+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $CAT in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_CAT="$CAT" # Let the user override the test with a path.
+  ;;
+  *)
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_path_CAT="$as_dir/$ac_word$ac_exec_ext"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+  ;;
+esac
+fi
+CAT=$ac_cv_path_CAT
+if test -n "$CAT"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $CAT" >&5
+$as_echo "$CAT" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+        if test "x$CAT" = x; then
+          as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
+        fi
+      else
+        # Otherwise we believe it is a complete path. Use it as it is.
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool CAT=$tool_specified" >&5
+$as_echo "$as_me: Will use user supplied tool CAT=$tool_specified" >&6;}
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for CAT" >&5
+$as_echo_n "checking for CAT... " >&6; }
+        if test ! -x "$tool_specified"; then
+          { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
+$as_echo "not found" >&6; }
+          as_fn_error $? "User supplied tool CAT=$tool_specified does not exist or is not executable" "$LINENO" 5
+        fi
+        { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
+$as_echo "$tool_specified" >&6; }
+      fi
+    fi
+  fi
+
+
 
   if test "x$CAT" = x; then
-    if test "xcat" = x; then
-      PROG_NAME=cat
-    else
-      PROG_NAME=cat
-    fi
-    { $as_echo "$as_me:${as_lineno-$LINENO}: Could not find $PROG_NAME!" >&5
-$as_echo "$as_me: Could not find $PROG_NAME!" >&6;}
-    as_fn_error $? "Cannot continue" "$LINENO" 5
-  fi
-
-
-
-  for ac_prog in chmod
+    as_fn_error $? "Could not find required tool for CAT" "$LINENO" 5
+  fi
+
+
+
+
+
+  # Publish this variable in the help.
+
+
+  if test "x$CHMOD" = x; then
+    # The variable is not set by user, try to locate tool using the code snippet
+    for ac_prog in chmod
 do
   # Extract the first word of "$ac_prog", so it can be a program name with args.
 set dummy $ac_prog; ac_word=$2
@@ -4122,21 +4696,213 @@
   test -n "$CHMOD" && break
 done
 
+  else
+    # The variable is set, but is it from the command line or the environment?
+
+    # Try to remove the string !CHMOD! from our list.
+    try_remove_var=${CONFIGURE_OVERRIDDEN_VARIABLES//!CHMOD!/}
+    if test "x$try_remove_var" = "x$CONFIGURE_OVERRIDDEN_VARIABLES"; then
+      # If it failed, the variable was not from the command line. Ignore it,
+      # but warn the user (except for BASH, which is always set by the calling BASH).
+      if test "xCHMOD" != xBASH; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: Ignoring value of CHMOD from the environment. Use command line variables instead." >&5
+$as_echo "$as_me: WARNING: Ignoring value of CHMOD from the environment. Use command line variables instead." >&2;}
+      fi
+      # Try to locate tool using the code snippet
+      for ac_prog in chmod
+do
+  # Extract the first word of "$ac_prog", so it can be a program name with args.
+set dummy $ac_prog; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_path_CHMOD+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $CHMOD in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_CHMOD="$CHMOD" # Let the user override the test with a path.
+  ;;
+  *)
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_path_CHMOD="$as_dir/$ac_word$ac_exec_ext"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+  ;;
+esac
+fi
+CHMOD=$ac_cv_path_CHMOD
+if test -n "$CHMOD"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $CHMOD" >&5
+$as_echo "$CHMOD" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+  test -n "$CHMOD" && break
+done
+
+    else
+      # If it succeeded, then it was overridden by the user. We will use it
+      # for the tool.
+
+      # First remove it from the list of overridden variables, so we can test
+      # for unknown variables in the end.
+      CONFIGURE_OVERRIDDEN_VARIABLES="$try_remove_var"
+
+      # Check if the provided tool contains a complete path.
+      tool_specified="$CHMOD"
+      tool_basename="${tool_specified##*/}"
+      if test "x$tool_basename" = "x$tool_specified"; then
+        # A command without a complete path is provided, search $PATH.
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool CHMOD=$tool_basename" >&5
+$as_echo "$as_me: Will search for user supplied tool CHMOD=$tool_basename" >&6;}
+        # Extract the first word of "$tool_basename", so it can be a program name with args.
+set dummy $tool_basename; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_path_CHMOD+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $CHMOD in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_CHMOD="$CHMOD" # Let the user override the test with a path.
+  ;;
+  *)
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_path_CHMOD="$as_dir/$ac_word$ac_exec_ext"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+  ;;
+esac
+fi
+CHMOD=$ac_cv_path_CHMOD
+if test -n "$CHMOD"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $CHMOD" >&5
+$as_echo "$CHMOD" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+        if test "x$CHMOD" = x; then
+          as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
+        fi
+      else
+        # Otherwise we believe it is a complete path. Use it as it is.
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool CHMOD=$tool_specified" >&5
+$as_echo "$as_me: Will use user supplied tool CHMOD=$tool_specified" >&6;}
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for CHMOD" >&5
+$as_echo_n "checking for CHMOD... " >&6; }
+        if test ! -x "$tool_specified"; then
+          { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
+$as_echo "not found" >&6; }
+          as_fn_error $? "User supplied tool CHMOD=$tool_specified does not exist or is not executable" "$LINENO" 5
+        fi
+        { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
+$as_echo "$tool_specified" >&6; }
+      fi
+    fi
+  fi
+
+
 
   if test "x$CHMOD" = x; then
-    if test "xchmod" = x; then
-      PROG_NAME=chmod
-    else
-      PROG_NAME=chmod
-    fi
-    { $as_echo "$as_me:${as_lineno-$LINENO}: Could not find $PROG_NAME!" >&5
-$as_echo "$as_me: Could not find $PROG_NAME!" >&6;}
-    as_fn_error $? "Cannot continue" "$LINENO" 5
-  fi
-
-
-
-  for ac_prog in cmp
+    as_fn_error $? "Could not find required tool for CHMOD" "$LINENO" 5
+  fi
+
+
+
+
+
+  # Publish this variable in the help.
+
+
+  if test "x$CMP" = x; then
+    # The variable is not set by user, try to locate tool using the code snippet
+    for ac_prog in cmp
+do
+  # Extract the first word of "$ac_prog", so it can be a program name with args.
+set dummy $ac_prog; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_path_CMP+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $CMP in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_CMP="$CMP" # Let the user override the test with a path.
+  ;;
+  *)
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_path_CMP="$as_dir/$ac_word$ac_exec_ext"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+  ;;
+esac
+fi
+CMP=$ac_cv_path_CMP
+if test -n "$CMP"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $CMP" >&5
+$as_echo "$CMP" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+  test -n "$CMP" && break
+done
+
+  else
+    # The variable is set, but is it from the command line or the environment?
+
+    # Try to remove the string !CMP! from our list.
+    try_remove_var=${CONFIGURE_OVERRIDDEN_VARIABLES//!CMP!/}
+    if test "x$try_remove_var" = "x$CONFIGURE_OVERRIDDEN_VARIABLES"; then
+      # If it failed, the variable was not from the command line. Ignore it,
+      # but warn the user (except for BASH, which is always set by the calling BASH).
+      if test "xCMP" != xBASH; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: Ignoring value of CMP from the environment. Use command line variables instead." >&5
+$as_echo "$as_me: WARNING: Ignoring value of CMP from the environment. Use command line variables instead." >&2;}
+      fi
+      # Try to locate tool using the code snippet
+      for ac_prog in cmp
 do
   # Extract the first word of "$ac_prog", so it can be a program name with args.
 set dummy $ac_prog; ac_word=$2
@@ -4181,21 +4947,155 @@
   test -n "$CMP" && break
 done
 
+    else
+      # If it succeeded, then it was overridden by the user. We will use it
+      # for the tool.
+
+      # First remove it from the list of overridden variables, so we can test
+      # for unknown variables in the end.
+      CONFIGURE_OVERRIDDEN_VARIABLES="$try_remove_var"
+
+      # Check if the provided tool contains a complete path.
+      tool_specified="$CMP"
+      tool_basename="${tool_specified##*/}"
+      if test "x$tool_basename" = "x$tool_specified"; then
+        # A command without a complete path is provided, search $PATH.
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool CMP=$tool_basename" >&5
+$as_echo "$as_me: Will search for user supplied tool CMP=$tool_basename" >&6;}
+        # Extract the first word of "$tool_basename", so it can be a program name with args.
+set dummy $tool_basename; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_path_CMP+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $CMP in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_CMP="$CMP" # Let the user override the test with a path.
+  ;;
+  *)
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_path_CMP="$as_dir/$ac_word$ac_exec_ext"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+  ;;
+esac
+fi
+CMP=$ac_cv_path_CMP
+if test -n "$CMP"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $CMP" >&5
+$as_echo "$CMP" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+        if test "x$CMP" = x; then
+          as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
+        fi
+      else
+        # Otherwise we believe it is a complete path. Use it as it is.
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool CMP=$tool_specified" >&5
+$as_echo "$as_me: Will use user supplied tool CMP=$tool_specified" >&6;}
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for CMP" >&5
+$as_echo_n "checking for CMP... " >&6; }
+        if test ! -x "$tool_specified"; then
+          { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
+$as_echo "not found" >&6; }
+          as_fn_error $? "User supplied tool CMP=$tool_specified does not exist or is not executable" "$LINENO" 5
+        fi
+        { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
+$as_echo "$tool_specified" >&6; }
+      fi
+    fi
+  fi
+
+
 
   if test "x$CMP" = x; then
-    if test "xcmp" = x; then
-      PROG_NAME=cmp
-    else
-      PROG_NAME=cmp
-    fi
-    { $as_echo "$as_me:${as_lineno-$LINENO}: Could not find $PROG_NAME!" >&5
-$as_echo "$as_me: Could not find $PROG_NAME!" >&6;}
-    as_fn_error $? "Cannot continue" "$LINENO" 5
-  fi
-
-
-
-  for ac_prog in comm
+    as_fn_error $? "Could not find required tool for CMP" "$LINENO" 5
+  fi
+
+
+
+
+
+  # Publish this variable in the help.
+
+
+  if test "x$COMM" = x; then
+    # The variable is not set by user, try to locate tool using the code snippet
+    for ac_prog in comm
+do
+  # Extract the first word of "$ac_prog", so it can be a program name with args.
+set dummy $ac_prog; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_path_COMM+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $COMM in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_COMM="$COMM" # Let the user override the test with a path.
+  ;;
+  *)
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_path_COMM="$as_dir/$ac_word$ac_exec_ext"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+  ;;
+esac
+fi
+COMM=$ac_cv_path_COMM
+if test -n "$COMM"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $COMM" >&5
+$as_echo "$COMM" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+  test -n "$COMM" && break
+done
+
+  else
+    # The variable is set, but is it from the command line or the environment?
+
+    # Try to remove the string !COMM! from our list.
+    try_remove_var=${CONFIGURE_OVERRIDDEN_VARIABLES//!COMM!/}
+    if test "x$try_remove_var" = "x$CONFIGURE_OVERRIDDEN_VARIABLES"; then
+      # If it failed, the variable was not from the command line. Ignore it,
+      # but warn the user (except for BASH, which is always set by the calling BASH).
+      if test "xCOMM" != xBASH; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: Ignoring value of COMM from the environment. Use command line variables instead." >&5
+$as_echo "$as_me: WARNING: Ignoring value of COMM from the environment. Use command line variables instead." >&2;}
+      fi
+      # Try to locate tool using the code snippet
+      for ac_prog in comm
 do
   # Extract the first word of "$ac_prog", so it can be a program name with args.
 set dummy $ac_prog; ac_word=$2
@@ -4240,21 +5140,97 @@
   test -n "$COMM" && break
 done
 
+    else
+      # If it succeeded, then it was overridden by the user. We will use it
+      # for the tool.
+
+      # First remove it from the list of overridden variables, so we can test
+      # for unknown variables in the end.
+      CONFIGURE_OVERRIDDEN_VARIABLES="$try_remove_var"
+
+      # Check if the provided tool contains a complete path.
+      tool_specified="$COMM"
+      tool_basename="${tool_specified##*/}"
+      if test "x$tool_basename" = "x$tool_specified"; then
+        # A command without a complete path is provided, search $PATH.
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool COMM=$tool_basename" >&5
+$as_echo "$as_me: Will search for user supplied tool COMM=$tool_basename" >&6;}
+        # Extract the first word of "$tool_basename", so it can be a program name with args.
+set dummy $tool_basename; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_path_COMM+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $COMM in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_COMM="$COMM" # Let the user override the test with a path.
+  ;;
+  *)
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_path_COMM="$as_dir/$ac_word$ac_exec_ext"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+  ;;
+esac
+fi
+COMM=$ac_cv_path_COMM
+if test -n "$COMM"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $COMM" >&5
+$as_echo "$COMM" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+        if test "x$COMM" = x; then
+          as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
+        fi
+      else
+        # Otherwise we believe it is a complete path. Use it as it is.
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool COMM=$tool_specified" >&5
+$as_echo "$as_me: Will use user supplied tool COMM=$tool_specified" >&6;}
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for COMM" >&5
+$as_echo_n "checking for COMM... " >&6; }
+        if test ! -x "$tool_specified"; then
+          { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
+$as_echo "not found" >&6; }
+          as_fn_error $? "User supplied tool COMM=$tool_specified does not exist or is not executable" "$LINENO" 5
+        fi
+        { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
+$as_echo "$tool_specified" >&6; }
+      fi
+    fi
+  fi
+
+
 
   if test "x$COMM" = x; then
-    if test "xcomm" = x; then
-      PROG_NAME=comm
-    else
-      PROG_NAME=comm
-    fi
-    { $as_echo "$as_me:${as_lineno-$LINENO}: Could not find $PROG_NAME!" >&5
-$as_echo "$as_me: Could not find $PROG_NAME!" >&6;}
-    as_fn_error $? "Cannot continue" "$LINENO" 5
-  fi
-
-
-
-  for ac_prog in cp
+    as_fn_error $? "Could not find required tool for COMM" "$LINENO" 5
+  fi
+
+
+
+
+
+  # Publish this variable in the help.
+
+
+  if test "x$CP" = x; then
+    # The variable is not set by user, try to locate tool using the code snippet
+    for ac_prog in cp
 do
   # Extract the first word of "$ac_prog", so it can be a program name with args.
 set dummy $ac_prog; ac_word=$2
@@ -4299,21 +5275,213 @@
   test -n "$CP" && break
 done
 
+  else
+    # The variable is set, but is it from the command line or the environment?
+
+    # Try to remove the string !CP! from our list.
+    try_remove_var=${CONFIGURE_OVERRIDDEN_VARIABLES//!CP!/}
+    if test "x$try_remove_var" = "x$CONFIGURE_OVERRIDDEN_VARIABLES"; then
+      # If it failed, the variable was not from the command line. Ignore it,
+      # but warn the user (except for BASH, which is always set by the calling BASH).
+      if test "xCP" != xBASH; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: Ignoring value of CP from the environment. Use command line variables instead." >&5
+$as_echo "$as_me: WARNING: Ignoring value of CP from the environment. Use command line variables instead." >&2;}
+      fi
+      # Try to locate tool using the code snippet
+      for ac_prog in cp
+do
+  # Extract the first word of "$ac_prog", so it can be a program name with args.
+set dummy $ac_prog; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_path_CP+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $CP in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_CP="$CP" # Let the user override the test with a path.
+  ;;
+  *)
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_path_CP="$as_dir/$ac_word$ac_exec_ext"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+  ;;
+esac
+fi
+CP=$ac_cv_path_CP
+if test -n "$CP"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $CP" >&5
+$as_echo "$CP" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+  test -n "$CP" && break
+done
+
+    else
+      # If it succeeded, then it was overridden by the user. We will use it
+      # for the tool.
+
+      # First remove it from the list of overridden variables, so we can test
+      # for unknown variables in the end.
+      CONFIGURE_OVERRIDDEN_VARIABLES="$try_remove_var"
+
+      # Check if the provided tool contains a complete path.
+      tool_specified="$CP"
+      tool_basename="${tool_specified##*/}"
+      if test "x$tool_basename" = "x$tool_specified"; then
+        # A command without a complete path is provided, search $PATH.
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool CP=$tool_basename" >&5
+$as_echo "$as_me: Will search for user supplied tool CP=$tool_basename" >&6;}
+        # Extract the first word of "$tool_basename", so it can be a program name with args.
+set dummy $tool_basename; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_path_CP+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $CP in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_CP="$CP" # Let the user override the test with a path.
+  ;;
+  *)
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_path_CP="$as_dir/$ac_word$ac_exec_ext"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+  ;;
+esac
+fi
+CP=$ac_cv_path_CP
+if test -n "$CP"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $CP" >&5
+$as_echo "$CP" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+        if test "x$CP" = x; then
+          as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
+        fi
+      else
+        # Otherwise we believe it is a complete path. Use it as it is.
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool CP=$tool_specified" >&5
+$as_echo "$as_me: Will use user supplied tool CP=$tool_specified" >&6;}
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for CP" >&5
+$as_echo_n "checking for CP... " >&6; }
+        if test ! -x "$tool_specified"; then
+          { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
+$as_echo "not found" >&6; }
+          as_fn_error $? "User supplied tool CP=$tool_specified does not exist or is not executable" "$LINENO" 5
+        fi
+        { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
+$as_echo "$tool_specified" >&6; }
+      fi
+    fi
+  fi
+
+
 
   if test "x$CP" = x; then
-    if test "xcp" = x; then
-      PROG_NAME=cp
-    else
-      PROG_NAME=cp
-    fi
-    { $as_echo "$as_me:${as_lineno-$LINENO}: Could not find $PROG_NAME!" >&5
-$as_echo "$as_me: Could not find $PROG_NAME!" >&6;}
-    as_fn_error $? "Cannot continue" "$LINENO" 5
-  fi
-
-
-
-  for ac_prog in cpio
+    as_fn_error $? "Could not find required tool for CP" "$LINENO" 5
+  fi
+
+
+
+
+
+  # Publish this variable in the help.
+
+
+  if test "x$CPIO" = x; then
+    # The variable is not set by user, try to locate tool using the code snippet
+    for ac_prog in cpio
+do
+  # Extract the first word of "$ac_prog", so it can be a program name with args.
+set dummy $ac_prog; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_path_CPIO+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $CPIO in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_CPIO="$CPIO" # Let the user override the test with a path.
+  ;;
+  *)
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_path_CPIO="$as_dir/$ac_word$ac_exec_ext"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+  ;;
+esac
+fi
+CPIO=$ac_cv_path_CPIO
+if test -n "$CPIO"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $CPIO" >&5
+$as_echo "$CPIO" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+  test -n "$CPIO" && break
+done
+
+  else
+    # The variable is set, but is it from the command line or the environment?
+
+    # Try to remove the string !CPIO! from our list.
+    try_remove_var=${CONFIGURE_OVERRIDDEN_VARIABLES//!CPIO!/}
+    if test "x$try_remove_var" = "x$CONFIGURE_OVERRIDDEN_VARIABLES"; then
+      # If it failed, the variable was not from the command line. Ignore it,
+      # but warn the user (except for BASH, which is always set by the calling BASH).
+      if test "xCPIO" != xBASH; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: Ignoring value of CPIO from the environment. Use command line variables instead." >&5
+$as_echo "$as_me: WARNING: Ignoring value of CPIO from the environment. Use command line variables instead." >&2;}
+      fi
+      # Try to locate tool using the code snippet
+      for ac_prog in cpio
 do
   # Extract the first word of "$ac_prog", so it can be a program name with args.
 set dummy $ac_prog; ac_word=$2
@@ -4358,21 +5526,155 @@
   test -n "$CPIO" && break
 done
 
+    else
+      # If it succeeded, then it was overridden by the user. We will use it
+      # for the tool.
+
+      # First remove it from the list of overridden variables, so we can test
+      # for unknown variables in the end.
+      CONFIGURE_OVERRIDDEN_VARIABLES="$try_remove_var"
+
+      # Check if the provided tool contains a complete path.
+      tool_specified="$CPIO"
+      tool_basename="${tool_specified##*/}"
+      if test "x$tool_basename" = "x$tool_specified"; then
+        # A command without a complete path is provided, search $PATH.
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool CPIO=$tool_basename" >&5
+$as_echo "$as_me: Will search for user supplied tool CPIO=$tool_basename" >&6;}
+        # Extract the first word of "$tool_basename", so it can be a program name with args.
+set dummy $tool_basename; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_path_CPIO+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $CPIO in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_CPIO="$CPIO" # Let the user override the test with a path.
+  ;;
+  *)
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_path_CPIO="$as_dir/$ac_word$ac_exec_ext"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+  ;;
+esac
+fi
+CPIO=$ac_cv_path_CPIO
+if test -n "$CPIO"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $CPIO" >&5
+$as_echo "$CPIO" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+        if test "x$CPIO" = x; then
+          as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
+        fi
+      else
+        # Otherwise we believe it is a complete path. Use it as it is.
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool CPIO=$tool_specified" >&5
+$as_echo "$as_me: Will use user supplied tool CPIO=$tool_specified" >&6;}
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for CPIO" >&5
+$as_echo_n "checking for CPIO... " >&6; }
+        if test ! -x "$tool_specified"; then
+          { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
+$as_echo "not found" >&6; }
+          as_fn_error $? "User supplied tool CPIO=$tool_specified does not exist or is not executable" "$LINENO" 5
+        fi
+        { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
+$as_echo "$tool_specified" >&6; }
+      fi
+    fi
+  fi
+
+
 
   if test "x$CPIO" = x; then
-    if test "xcpio" = x; then
-      PROG_NAME=cpio
-    else
-      PROG_NAME=cpio
-    fi
-    { $as_echo "$as_me:${as_lineno-$LINENO}: Could not find $PROG_NAME!" >&5
-$as_echo "$as_me: Could not find $PROG_NAME!" >&6;}
-    as_fn_error $? "Cannot continue" "$LINENO" 5
-  fi
-
-
-
-  for ac_prog in cut
+    as_fn_error $? "Could not find required tool for CPIO" "$LINENO" 5
+  fi
+
+
+
+
+
+  # Publish this variable in the help.
+
+
+  if test "x$CUT" = x; then
+    # The variable is not set by user, try to locate tool using the code snippet
+    for ac_prog in cut
+do
+  # Extract the first word of "$ac_prog", so it can be a program name with args.
+set dummy $ac_prog; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_path_CUT+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $CUT in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_CUT="$CUT" # Let the user override the test with a path.
+  ;;
+  *)
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_path_CUT="$as_dir/$ac_word$ac_exec_ext"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+  ;;
+esac
+fi
+CUT=$ac_cv_path_CUT
+if test -n "$CUT"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $CUT" >&5
+$as_echo "$CUT" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+  test -n "$CUT" && break
+done
+
+  else
+    # The variable is set, but is it from the command line or the environment?
+
+    # Try to remove the string !CUT! from our list.
+    try_remove_var=${CONFIGURE_OVERRIDDEN_VARIABLES//!CUT!/}
+    if test "x$try_remove_var" = "x$CONFIGURE_OVERRIDDEN_VARIABLES"; then
+      # If it failed, the variable was not from the command line. Ignore it,
+      # but warn the user (except for BASH, which is always set by the calling BASH).
+      if test "xCUT" != xBASH; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: Ignoring value of CUT from the environment. Use command line variables instead." >&5
+$as_echo "$as_me: WARNING: Ignoring value of CUT from the environment. Use command line variables instead." >&2;}
+      fi
+      # Try to locate tool using the code snippet
+      for ac_prog in cut
 do
   # Extract the first word of "$ac_prog", so it can be a program name with args.
 set dummy $ac_prog; ac_word=$2
@@ -4417,21 +5719,155 @@
   test -n "$CUT" && break
 done
 
+    else
+      # If it succeeded, then it was overridden by the user. We will use it
+      # for the tool.
+
+      # First remove it from the list of overridden variables, so we can test
+      # for unknown variables in the end.
+      CONFIGURE_OVERRIDDEN_VARIABLES="$try_remove_var"
+
+      # Check if the provided tool contains a complete path.
+      tool_specified="$CUT"
+      tool_basename="${tool_specified##*/}"
+      if test "x$tool_basename" = "x$tool_specified"; then
+        # A command without a complete path is provided, search $PATH.
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool CUT=$tool_basename" >&5
+$as_echo "$as_me: Will search for user supplied tool CUT=$tool_basename" >&6;}
+        # Extract the first word of "$tool_basename", so it can be a program name with args.
+set dummy $tool_basename; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_path_CUT+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $CUT in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_CUT="$CUT" # Let the user override the test with a path.
+  ;;
+  *)
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_path_CUT="$as_dir/$ac_word$ac_exec_ext"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+  ;;
+esac
+fi
+CUT=$ac_cv_path_CUT
+if test -n "$CUT"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $CUT" >&5
+$as_echo "$CUT" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+        if test "x$CUT" = x; then
+          as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
+        fi
+      else
+        # Otherwise we believe it is a complete path. Use it as it is.
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool CUT=$tool_specified" >&5
+$as_echo "$as_me: Will use user supplied tool CUT=$tool_specified" >&6;}
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for CUT" >&5
+$as_echo_n "checking for CUT... " >&6; }
+        if test ! -x "$tool_specified"; then
+          { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
+$as_echo "not found" >&6; }
+          as_fn_error $? "User supplied tool CUT=$tool_specified does not exist or is not executable" "$LINENO" 5
+        fi
+        { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
+$as_echo "$tool_specified" >&6; }
+      fi
+    fi
+  fi
+
+
 
   if test "x$CUT" = x; then
-    if test "xcut" = x; then
-      PROG_NAME=cut
-    else
-      PROG_NAME=cut
-    fi
-    { $as_echo "$as_me:${as_lineno-$LINENO}: Could not find $PROG_NAME!" >&5
-$as_echo "$as_me: Could not find $PROG_NAME!" >&6;}
-    as_fn_error $? "Cannot continue" "$LINENO" 5
-  fi
-
-
-
-  for ac_prog in date
+    as_fn_error $? "Could not find required tool for CUT" "$LINENO" 5
+  fi
+
+
+
+
+
+  # Publish this variable in the help.
+
+
+  if test "x$DATE" = x; then
+    # The variable is not set by user, try to locate tool using the code snippet
+    for ac_prog in date
+do
+  # Extract the first word of "$ac_prog", so it can be a program name with args.
+set dummy $ac_prog; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_path_DATE+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $DATE in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_DATE="$DATE" # Let the user override the test with a path.
+  ;;
+  *)
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_path_DATE="$as_dir/$ac_word$ac_exec_ext"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+  ;;
+esac
+fi
+DATE=$ac_cv_path_DATE
+if test -n "$DATE"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $DATE" >&5
+$as_echo "$DATE" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+  test -n "$DATE" && break
+done
+
+  else
+    # The variable is set, but is it from the command line or the environment?
+
+    # Try to remove the string !DATE! from our list.
+    try_remove_var=${CONFIGURE_OVERRIDDEN_VARIABLES//!DATE!/}
+    if test "x$try_remove_var" = "x$CONFIGURE_OVERRIDDEN_VARIABLES"; then
+      # If it failed, the variable was not from the command line. Ignore it,
+      # but warn the user (except for BASH, which is always set by the calling BASH).
+      if test "xDATE" != xBASH; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: Ignoring value of DATE from the environment. Use command line variables instead." >&5
+$as_echo "$as_me: WARNING: Ignoring value of DATE from the environment. Use command line variables instead." >&2;}
+      fi
+      # Try to locate tool using the code snippet
+      for ac_prog in date
 do
   # Extract the first word of "$ac_prog", so it can be a program name with args.
 set dummy $ac_prog; ac_word=$2
@@ -4476,21 +5912,97 @@
   test -n "$DATE" && break
 done
 
+    else
+      # If it succeeded, then it was overridden by the user. We will use it
+      # for the tool.
+
+      # First remove it from the list of overridden variables, so we can test
+      # for unknown variables in the end.
+      CONFIGURE_OVERRIDDEN_VARIABLES="$try_remove_var"
+
+      # Check if the provided tool contains a complete path.
+      tool_specified="$DATE"
+      tool_basename="${tool_specified##*/}"
+      if test "x$tool_basename" = "x$tool_specified"; then
+        # A command without a complete path is provided, search $PATH.
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool DATE=$tool_basename" >&5
+$as_echo "$as_me: Will search for user supplied tool DATE=$tool_basename" >&6;}
+        # Extract the first word of "$tool_basename", so it can be a program name with args.
+set dummy $tool_basename; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_path_DATE+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $DATE in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_DATE="$DATE" # Let the user override the test with a path.
+  ;;
+  *)
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_path_DATE="$as_dir/$ac_word$ac_exec_ext"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+  ;;
+esac
+fi
+DATE=$ac_cv_path_DATE
+if test -n "$DATE"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $DATE" >&5
+$as_echo "$DATE" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+        if test "x$DATE" = x; then
+          as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
+        fi
+      else
+        # Otherwise we believe it is a complete path. Use it as it is.
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool DATE=$tool_specified" >&5
+$as_echo "$as_me: Will use user supplied tool DATE=$tool_specified" >&6;}
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for DATE" >&5
+$as_echo_n "checking for DATE... " >&6; }
+        if test ! -x "$tool_specified"; then
+          { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
+$as_echo "not found" >&6; }
+          as_fn_error $? "User supplied tool DATE=$tool_specified does not exist or is not executable" "$LINENO" 5
+        fi
+        { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
+$as_echo "$tool_specified" >&6; }
+      fi
+    fi
+  fi
+
+
 
   if test "x$DATE" = x; then
-    if test "xdate" = x; then
-      PROG_NAME=date
-    else
-      PROG_NAME=date
-    fi
-    { $as_echo "$as_me:${as_lineno-$LINENO}: Could not find $PROG_NAME!" >&5
-$as_echo "$as_me: Could not find $PROG_NAME!" >&6;}
-    as_fn_error $? "Cannot continue" "$LINENO" 5
-  fi
-
-
-
-  for ac_prog in gdiff diff
+    as_fn_error $? "Could not find required tool for DATE" "$LINENO" 5
+  fi
+
+
+
+
+
+  # Publish this variable in the help.
+
+
+  if test "x$DIFF" = x; then
+    # The variable is not set by user, try to locate tool using the code snippet
+    for ac_prog in gdiff diff
 do
   # Extract the first word of "$ac_prog", so it can be a program name with args.
 set dummy $ac_prog; ac_word=$2
@@ -4535,21 +6047,213 @@
   test -n "$DIFF" && break
 done
 
+  else
+    # The variable is set, but is it from the command line or the environment?
+
+    # Try to remove the string !DIFF! from our list.
+    try_remove_var=${CONFIGURE_OVERRIDDEN_VARIABLES//!DIFF!/}
+    if test "x$try_remove_var" = "x$CONFIGURE_OVERRIDDEN_VARIABLES"; then
+      # If it failed, the variable was not from the command line. Ignore it,
+      # but warn the user (except for BASH, which is always set by the calling BASH).
+      if test "xDIFF" != xBASH; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: Ignoring value of DIFF from the environment. Use command line variables instead." >&5
+$as_echo "$as_me: WARNING: Ignoring value of DIFF from the environment. Use command line variables instead." >&2;}
+      fi
+      # Try to locate tool using the code snippet
+      for ac_prog in gdiff diff
+do
+  # Extract the first word of "$ac_prog", so it can be a program name with args.
+set dummy $ac_prog; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_path_DIFF+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $DIFF in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_DIFF="$DIFF" # Let the user override the test with a path.
+  ;;
+  *)
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_path_DIFF="$as_dir/$ac_word$ac_exec_ext"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+  ;;
+esac
+fi
+DIFF=$ac_cv_path_DIFF
+if test -n "$DIFF"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $DIFF" >&5
+$as_echo "$DIFF" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+  test -n "$DIFF" && break
+done
+
+    else
+      # If it succeeded, then it was overridden by the user. We will use it
+      # for the tool.
+
+      # First remove it from the list of overridden variables, so we can test
+      # for unknown variables in the end.
+      CONFIGURE_OVERRIDDEN_VARIABLES="$try_remove_var"
+
+      # Check if the provided tool contains a complete path.
+      tool_specified="$DIFF"
+      tool_basename="${tool_specified##*/}"
+      if test "x$tool_basename" = "x$tool_specified"; then
+        # A command without a complete path is provided, search $PATH.
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool DIFF=$tool_basename" >&5
+$as_echo "$as_me: Will search for user supplied tool DIFF=$tool_basename" >&6;}
+        # Extract the first word of "$tool_basename", so it can be a program name with args.
+set dummy $tool_basename; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_path_DIFF+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $DIFF in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_DIFF="$DIFF" # Let the user override the test with a path.
+  ;;
+  *)
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_path_DIFF="$as_dir/$ac_word$ac_exec_ext"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+  ;;
+esac
+fi
+DIFF=$ac_cv_path_DIFF
+if test -n "$DIFF"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $DIFF" >&5
+$as_echo "$DIFF" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+        if test "x$DIFF" = x; then
+          as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
+        fi
+      else
+        # Otherwise we believe it is a complete path. Use it as it is.
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool DIFF=$tool_specified" >&5
+$as_echo "$as_me: Will use user supplied tool DIFF=$tool_specified" >&6;}
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for DIFF" >&5
+$as_echo_n "checking for DIFF... " >&6; }
+        if test ! -x "$tool_specified"; then
+          { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
+$as_echo "not found" >&6; }
+          as_fn_error $? "User supplied tool DIFF=$tool_specified does not exist or is not executable" "$LINENO" 5
+        fi
+        { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
+$as_echo "$tool_specified" >&6; }
+      fi
+    fi
+  fi
+
+
 
   if test "x$DIFF" = x; then
-    if test "xgdiff diff" = x; then
-      PROG_NAME=diff
-    else
-      PROG_NAME=gdiff diff
-    fi
-    { $as_echo "$as_me:${as_lineno-$LINENO}: Could not find $PROG_NAME!" >&5
-$as_echo "$as_me: Could not find $PROG_NAME!" >&6;}
-    as_fn_error $? "Cannot continue" "$LINENO" 5
-  fi
-
-
-
-  for ac_prog in dirname
+    as_fn_error $? "Could not find required tool for DIFF" "$LINENO" 5
+  fi
+
+
+
+
+
+  # Publish this variable in the help.
+
+
+  if test "x$DIRNAME" = x; then
+    # The variable is not set by user, try to locate tool using the code snippet
+    for ac_prog in dirname
+do
+  # Extract the first word of "$ac_prog", so it can be a program name with args.
+set dummy $ac_prog; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_path_DIRNAME+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $DIRNAME in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_DIRNAME="$DIRNAME" # Let the user override the test with a path.
+  ;;
+  *)
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_path_DIRNAME="$as_dir/$ac_word$ac_exec_ext"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+  ;;
+esac
+fi
+DIRNAME=$ac_cv_path_DIRNAME
+if test -n "$DIRNAME"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $DIRNAME" >&5
+$as_echo "$DIRNAME" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+  test -n "$DIRNAME" && break
+done
+
+  else
+    # The variable is set, but is it from the command line or the environment?
+
+    # Try to remove the string !DIRNAME! from our list.
+    try_remove_var=${CONFIGURE_OVERRIDDEN_VARIABLES//!DIRNAME!/}
+    if test "x$try_remove_var" = "x$CONFIGURE_OVERRIDDEN_VARIABLES"; then
+      # If it failed, the variable was not from the command line. Ignore it,
+      # but warn the user (except for BASH, which is always set by the calling BASH).
+      if test "xDIRNAME" != xBASH; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: Ignoring value of DIRNAME from the environment. Use command line variables instead." >&5
+$as_echo "$as_me: WARNING: Ignoring value of DIRNAME from the environment. Use command line variables instead." >&2;}
+      fi
+      # Try to locate tool using the code snippet
+      for ac_prog in dirname
 do
   # Extract the first word of "$ac_prog", so it can be a program name with args.
 set dummy $ac_prog; ac_word=$2
@@ -4594,21 +6298,97 @@
   test -n "$DIRNAME" && break
 done
 
+    else
+      # If it succeeded, then it was overridden by the user. We will use it
+      # for the tool.
+
+      # First remove it from the list of overridden variables, so we can test
+      # for unknown variables in the end.
+      CONFIGURE_OVERRIDDEN_VARIABLES="$try_remove_var"
+
+      # Check if the provided tool contains a complete path.
+      tool_specified="$DIRNAME"
+      tool_basename="${tool_specified##*/}"
+      if test "x$tool_basename" = "x$tool_specified"; then
+        # A command without a complete path is provided, search $PATH.
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool DIRNAME=$tool_basename" >&5
+$as_echo "$as_me: Will search for user supplied tool DIRNAME=$tool_basename" >&6;}
+        # Extract the first word of "$tool_basename", so it can be a program name with args.
+set dummy $tool_basename; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_path_DIRNAME+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $DIRNAME in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_DIRNAME="$DIRNAME" # Let the user override the test with a path.
+  ;;
+  *)
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_path_DIRNAME="$as_dir/$ac_word$ac_exec_ext"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+  ;;
+esac
+fi
+DIRNAME=$ac_cv_path_DIRNAME
+if test -n "$DIRNAME"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $DIRNAME" >&5
+$as_echo "$DIRNAME" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+        if test "x$DIRNAME" = x; then
+          as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
+        fi
+      else
+        # Otherwise we believe it is a complete path. Use it as it is.
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool DIRNAME=$tool_specified" >&5
+$as_echo "$as_me: Will use user supplied tool DIRNAME=$tool_specified" >&6;}
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for DIRNAME" >&5
+$as_echo_n "checking for DIRNAME... " >&6; }
+        if test ! -x "$tool_specified"; then
+          { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
+$as_echo "not found" >&6; }
+          as_fn_error $? "User supplied tool DIRNAME=$tool_specified does not exist or is not executable" "$LINENO" 5
+        fi
+        { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
+$as_echo "$tool_specified" >&6; }
+      fi
+    fi
+  fi
+
+
 
   if test "x$DIRNAME" = x; then
-    if test "xdirname" = x; then
-      PROG_NAME=dirname
-    else
-      PROG_NAME=dirname
-    fi
-    { $as_echo "$as_me:${as_lineno-$LINENO}: Could not find $PROG_NAME!" >&5
-$as_echo "$as_me: Could not find $PROG_NAME!" >&6;}
-    as_fn_error $? "Cannot continue" "$LINENO" 5
-  fi
-
-
-
-  for ac_prog in echo
+    as_fn_error $? "Could not find required tool for DIRNAME" "$LINENO" 5
+  fi
+
+
+
+
+
+  # Publish this variable in the help.
+
+
+  if test "x$ECHO" = x; then
+    # The variable is not set by user, try to locate tool using the code snippet
+    for ac_prog in echo
 do
   # Extract the first word of "$ac_prog", so it can be a program name with args.
 set dummy $ac_prog; ac_word=$2
@@ -4653,21 +6433,213 @@
   test -n "$ECHO" && break
 done
 
+  else
+    # The variable is set, but is it from the command line or the environment?
+
+    # Try to remove the string !ECHO! from our list.
+    try_remove_var=${CONFIGURE_OVERRIDDEN_VARIABLES//!ECHO!/}
+    if test "x$try_remove_var" = "x$CONFIGURE_OVERRIDDEN_VARIABLES"; then
+      # If it failed, the variable was not from the command line. Ignore it,
+      # but warn the user (except for BASH, which is always set by the calling BASH).
+      if test "xECHO" != xBASH; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: Ignoring value of ECHO from the environment. Use command line variables instead." >&5
+$as_echo "$as_me: WARNING: Ignoring value of ECHO from the environment. Use command line variables instead." >&2;}
+      fi
+      # Try to locate tool using the code snippet
+      for ac_prog in echo
+do
+  # Extract the first word of "$ac_prog", so it can be a program name with args.
+set dummy $ac_prog; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_path_ECHO+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $ECHO in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_ECHO="$ECHO" # Let the user override the test with a path.
+  ;;
+  *)
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_path_ECHO="$as_dir/$ac_word$ac_exec_ext"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+  ;;
+esac
+fi
+ECHO=$ac_cv_path_ECHO
+if test -n "$ECHO"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ECHO" >&5
+$as_echo "$ECHO" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+  test -n "$ECHO" && break
+done
+
+    else
+      # If it succeeded, then it was overridden by the user. We will use it
+      # for the tool.
+
+      # First remove it from the list of overridden variables, so we can test
+      # for unknown variables in the end.
+      CONFIGURE_OVERRIDDEN_VARIABLES="$try_remove_var"
+
+      # Check if the provided tool contains a complete path.
+      tool_specified="$ECHO"
+      tool_basename="${tool_specified##*/}"
+      if test "x$tool_basename" = "x$tool_specified"; then
+        # A command without a complete path is provided, search $PATH.
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool ECHO=$tool_basename" >&5
+$as_echo "$as_me: Will search for user supplied tool ECHO=$tool_basename" >&6;}
+        # Extract the first word of "$tool_basename", so it can be a program name with args.
+set dummy $tool_basename; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_path_ECHO+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $ECHO in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_ECHO="$ECHO" # Let the user override the test with a path.
+  ;;
+  *)
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_path_ECHO="$as_dir/$ac_word$ac_exec_ext"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+  ;;
+esac
+fi
+ECHO=$ac_cv_path_ECHO
+if test -n "$ECHO"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ECHO" >&5
+$as_echo "$ECHO" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+        if test "x$ECHO" = x; then
+          as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
+        fi
+      else
+        # Otherwise we believe it is a complete path. Use it as it is.
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool ECHO=$tool_specified" >&5
+$as_echo "$as_me: Will use user supplied tool ECHO=$tool_specified" >&6;}
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for ECHO" >&5
+$as_echo_n "checking for ECHO... " >&6; }
+        if test ! -x "$tool_specified"; then
+          { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
+$as_echo "not found" >&6; }
+          as_fn_error $? "User supplied tool ECHO=$tool_specified does not exist or is not executable" "$LINENO" 5
+        fi
+        { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
+$as_echo "$tool_specified" >&6; }
+      fi
+    fi
+  fi
+
+
 
   if test "x$ECHO" = x; then
-    if test "xecho" = x; then
-      PROG_NAME=echo
-    else
-      PROG_NAME=echo
-    fi
-    { $as_echo "$as_me:${as_lineno-$LINENO}: Could not find $PROG_NAME!" >&5
-$as_echo "$as_me: Could not find $PROG_NAME!" >&6;}
-    as_fn_error $? "Cannot continue" "$LINENO" 5
-  fi
-
-
-
-  for ac_prog in expr
+    as_fn_error $? "Could not find required tool for ECHO" "$LINENO" 5
+  fi
+
+
+
+
+
+  # Publish this variable in the help.
+
+
+  if test "x$EXPR" = x; then
+    # The variable is not set by user, try to locate tool using the code snippet
+    for ac_prog in expr
+do
+  # Extract the first word of "$ac_prog", so it can be a program name with args.
+set dummy $ac_prog; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_path_EXPR+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $EXPR in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_EXPR="$EXPR" # Let the user override the test with a path.
+  ;;
+  *)
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_path_EXPR="$as_dir/$ac_word$ac_exec_ext"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+  ;;
+esac
+fi
+EXPR=$ac_cv_path_EXPR
+if test -n "$EXPR"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $EXPR" >&5
+$as_echo "$EXPR" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+  test -n "$EXPR" && break
+done
+
+  else
+    # The variable is set, but is it from the command line or the environment?
+
+    # Try to remove the string !EXPR! from our list.
+    try_remove_var=${CONFIGURE_OVERRIDDEN_VARIABLES//!EXPR!/}
+    if test "x$try_remove_var" = "x$CONFIGURE_OVERRIDDEN_VARIABLES"; then
+      # If it failed, the variable was not from the command line. Ignore it,
+      # but warn the user (except for BASH, which is always set by the calling BASH).
+      if test "xEXPR" != xBASH; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: Ignoring value of EXPR from the environment. Use command line variables instead." >&5
+$as_echo "$as_me: WARNING: Ignoring value of EXPR from the environment. Use command line variables instead." >&2;}
+      fi
+      # Try to locate tool using the code snippet
+      for ac_prog in expr
 do
   # Extract the first word of "$ac_prog", so it can be a program name with args.
 set dummy $ac_prog; ac_word=$2
@@ -4712,21 +6684,155 @@
   test -n "$EXPR" && break
 done
 
+    else
+      # If it succeeded, then it was overridden by the user. We will use it
+      # for the tool.
+
+      # First remove it from the list of overridden variables, so we can test
+      # for unknown variables in the end.
+      CONFIGURE_OVERRIDDEN_VARIABLES="$try_remove_var"
+
+      # Check if the provided tool contains a complete path.
+      tool_specified="$EXPR"
+      tool_basename="${tool_specified##*/}"
+      if test "x$tool_basename" = "x$tool_specified"; then
+        # A command without a complete path is provided, search $PATH.
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool EXPR=$tool_basename" >&5
+$as_echo "$as_me: Will search for user supplied tool EXPR=$tool_basename" >&6;}
+        # Extract the first word of "$tool_basename", so it can be a program name with args.
+set dummy $tool_basename; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_path_EXPR+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $EXPR in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_EXPR="$EXPR" # Let the user override the test with a path.
+  ;;
+  *)
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_path_EXPR="$as_dir/$ac_word$ac_exec_ext"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+  ;;
+esac
+fi
+EXPR=$ac_cv_path_EXPR
+if test -n "$EXPR"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $EXPR" >&5
+$as_echo "$EXPR" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+        if test "x$EXPR" = x; then
+          as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
+        fi
+      else
+        # Otherwise we believe it is a complete path. Use it as it is.
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool EXPR=$tool_specified" >&5
+$as_echo "$as_me: Will use user supplied tool EXPR=$tool_specified" >&6;}
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for EXPR" >&5
+$as_echo_n "checking for EXPR... " >&6; }
+        if test ! -x "$tool_specified"; then
+          { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
+$as_echo "not found" >&6; }
+          as_fn_error $? "User supplied tool EXPR=$tool_specified does not exist or is not executable" "$LINENO" 5
+        fi
+        { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
+$as_echo "$tool_specified" >&6; }
+      fi
+    fi
+  fi
+
+
 
   if test "x$EXPR" = x; then
-    if test "xexpr" = x; then
-      PROG_NAME=expr
-    else
-      PROG_NAME=expr
-    fi
-    { $as_echo "$as_me:${as_lineno-$LINENO}: Could not find $PROG_NAME!" >&5
-$as_echo "$as_me: Could not find $PROG_NAME!" >&6;}
-    as_fn_error $? "Cannot continue" "$LINENO" 5
-  fi
-
-
-
-  for ac_prog in file
+    as_fn_error $? "Could not find required tool for EXPR" "$LINENO" 5
+  fi
+
+
+
+
+
+  # Publish this variable in the help.
+
+
+  if test "x$FILE" = x; then
+    # The variable is not set by user, try to locate tool using the code snippet
+    for ac_prog in file
+do
+  # Extract the first word of "$ac_prog", so it can be a program name with args.
+set dummy $ac_prog; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_path_FILE+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $FILE in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_FILE="$FILE" # Let the user override the test with a path.
+  ;;
+  *)
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_path_FILE="$as_dir/$ac_word$ac_exec_ext"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+  ;;
+esac
+fi
+FILE=$ac_cv_path_FILE
+if test -n "$FILE"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $FILE" >&5
+$as_echo "$FILE" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+  test -n "$FILE" && break
+done
+
+  else
+    # The variable is set, but is it from the command line or the environment?
+
+    # Try to remove the string !FILE! from our list.
+    try_remove_var=${CONFIGURE_OVERRIDDEN_VARIABLES//!FILE!/}
+    if test "x$try_remove_var" = "x$CONFIGURE_OVERRIDDEN_VARIABLES"; then
+      # If it failed, the variable was not from the command line. Ignore it,
+      # but warn the user (except for BASH, which is always set by the calling BASH).
+      if test "xFILE" != xBASH; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: Ignoring value of FILE from the environment. Use command line variables instead." >&5
+$as_echo "$as_me: WARNING: Ignoring value of FILE from the environment. Use command line variables instead." >&2;}
+      fi
+      # Try to locate tool using the code snippet
+      for ac_prog in file
 do
   # Extract the first word of "$ac_prog", so it can be a program name with args.
 set dummy $ac_prog; ac_word=$2
@@ -4771,21 +6877,155 @@
   test -n "$FILE" && break
 done
 
+    else
+      # If it succeeded, then it was overridden by the user. We will use it
+      # for the tool.
+
+      # First remove it from the list of overridden variables, so we can test
+      # for unknown variables in the end.
+      CONFIGURE_OVERRIDDEN_VARIABLES="$try_remove_var"
+
+      # Check if the provided tool contains a complete path.
+      tool_specified="$FILE"
+      tool_basename="${tool_specified##*/}"
+      if test "x$tool_basename" = "x$tool_specified"; then
+        # A command without a complete path is provided, search $PATH.
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool FILE=$tool_basename" >&5
+$as_echo "$as_me: Will search for user supplied tool FILE=$tool_basename" >&6;}
+        # Extract the first word of "$tool_basename", so it can be a program name with args.
+set dummy $tool_basename; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_path_FILE+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $FILE in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_FILE="$FILE" # Let the user override the test with a path.
+  ;;
+  *)
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_path_FILE="$as_dir/$ac_word$ac_exec_ext"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+  ;;
+esac
+fi
+FILE=$ac_cv_path_FILE
+if test -n "$FILE"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $FILE" >&5
+$as_echo "$FILE" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+        if test "x$FILE" = x; then
+          as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
+        fi
+      else
+        # Otherwise we believe it is a complete path. Use it as it is.
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool FILE=$tool_specified" >&5
+$as_echo "$as_me: Will use user supplied tool FILE=$tool_specified" >&6;}
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for FILE" >&5
+$as_echo_n "checking for FILE... " >&6; }
+        if test ! -x "$tool_specified"; then
+          { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
+$as_echo "not found" >&6; }
+          as_fn_error $? "User supplied tool FILE=$tool_specified does not exist or is not executable" "$LINENO" 5
+        fi
+        { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
+$as_echo "$tool_specified" >&6; }
+      fi
+    fi
+  fi
+
+
 
   if test "x$FILE" = x; then
-    if test "xfile" = x; then
-      PROG_NAME=file
-    else
-      PROG_NAME=file
-    fi
-    { $as_echo "$as_me:${as_lineno-$LINENO}: Could not find $PROG_NAME!" >&5
-$as_echo "$as_me: Could not find $PROG_NAME!" >&6;}
-    as_fn_error $? "Cannot continue" "$LINENO" 5
-  fi
-
-
-
-  for ac_prog in find
+    as_fn_error $? "Could not find required tool for FILE" "$LINENO" 5
+  fi
+
+
+
+
+
+  # Publish this variable in the help.
+
+
+  if test "x$FIND" = x; then
+    # The variable is not set by user, try to locate tool using the code snippet
+    for ac_prog in find
+do
+  # Extract the first word of "$ac_prog", so it can be a program name with args.
+set dummy $ac_prog; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_path_FIND+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $FIND in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_FIND="$FIND" # Let the user override the test with a path.
+  ;;
+  *)
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_path_FIND="$as_dir/$ac_word$ac_exec_ext"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+  ;;
+esac
+fi
+FIND=$ac_cv_path_FIND
+if test -n "$FIND"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $FIND" >&5
+$as_echo "$FIND" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+  test -n "$FIND" && break
+done
+
+  else
+    # The variable is set, but is it from the command line or the environment?
+
+    # Try to remove the string !FIND! from our list.
+    try_remove_var=${CONFIGURE_OVERRIDDEN_VARIABLES//!FIND!/}
+    if test "x$try_remove_var" = "x$CONFIGURE_OVERRIDDEN_VARIABLES"; then
+      # If it failed, the variable was not from the command line. Ignore it,
+      # but warn the user (except for BASH, which is always set by the calling BASH).
+      if test "xFIND" != xBASH; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: Ignoring value of FIND from the environment. Use command line variables instead." >&5
+$as_echo "$as_me: WARNING: Ignoring value of FIND from the environment. Use command line variables instead." >&2;}
+      fi
+      # Try to locate tool using the code snippet
+      for ac_prog in find
 do
   # Extract the first word of "$ac_prog", so it can be a program name with args.
 set dummy $ac_prog; ac_word=$2
@@ -4830,21 +7070,97 @@
   test -n "$FIND" && break
 done
 
+    else
+      # If it succeeded, then it was overridden by the user. We will use it
+      # for the tool.
+
+      # First remove it from the list of overridden variables, so we can test
+      # for unknown variables in the end.
+      CONFIGURE_OVERRIDDEN_VARIABLES="$try_remove_var"
+
+      # Check if the provided tool contains a complete path.
+      tool_specified="$FIND"
+      tool_basename="${tool_specified##*/}"
+      if test "x$tool_basename" = "x$tool_specified"; then
+        # A command without a complete path is provided, search $PATH.
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool FIND=$tool_basename" >&5
+$as_echo "$as_me: Will search for user supplied tool FIND=$tool_basename" >&6;}
+        # Extract the first word of "$tool_basename", so it can be a program name with args.
+set dummy $tool_basename; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_path_FIND+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $FIND in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_FIND="$FIND" # Let the user override the test with a path.
+  ;;
+  *)
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_path_FIND="$as_dir/$ac_word$ac_exec_ext"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+  ;;
+esac
+fi
+FIND=$ac_cv_path_FIND
+if test -n "$FIND"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $FIND" >&5
+$as_echo "$FIND" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+        if test "x$FIND" = x; then
+          as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
+        fi
+      else
+        # Otherwise we believe it is a complete path. Use it as it is.
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool FIND=$tool_specified" >&5
+$as_echo "$as_me: Will use user supplied tool FIND=$tool_specified" >&6;}
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for FIND" >&5
+$as_echo_n "checking for FIND... " >&6; }
+        if test ! -x "$tool_specified"; then
+          { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
+$as_echo "not found" >&6; }
+          as_fn_error $? "User supplied tool FIND=$tool_specified does not exist or is not executable" "$LINENO" 5
+        fi
+        { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
+$as_echo "$tool_specified" >&6; }
+      fi
+    fi
+  fi
+
+
 
   if test "x$FIND" = x; then
-    if test "xfind" = x; then
-      PROG_NAME=find
-    else
-      PROG_NAME=find
-    fi
-    { $as_echo "$as_me:${as_lineno-$LINENO}: Could not find $PROG_NAME!" >&5
-$as_echo "$as_me: Could not find $PROG_NAME!" >&6;}
-    as_fn_error $? "Cannot continue" "$LINENO" 5
-  fi
-
-
-
-  for ac_prog in head
+    as_fn_error $? "Could not find required tool for FIND" "$LINENO" 5
+  fi
+
+
+
+
+
+  # Publish this variable in the help.
+
+
+  if test "x$HEAD" = x; then
+    # The variable is not set by user, try to locate tool using the code snippet
+    for ac_prog in head
 do
   # Extract the first word of "$ac_prog", so it can be a program name with args.
 set dummy $ac_prog; ac_word=$2
@@ -4889,21 +7205,213 @@
   test -n "$HEAD" && break
 done
 
+  else
+    # The variable is set, but is it from the command line or the environment?
+
+    # Try to remove the string !HEAD! from our list.
+    try_remove_var=${CONFIGURE_OVERRIDDEN_VARIABLES//!HEAD!/}
+    if test "x$try_remove_var" = "x$CONFIGURE_OVERRIDDEN_VARIABLES"; then
+      # If it failed, the variable was not from the command line. Ignore it,
+      # but warn the user (except for BASH, which is always set by the calling BASH).
+      if test "xHEAD" != xBASH; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: Ignoring value of HEAD from the environment. Use command line variables instead." >&5
+$as_echo "$as_me: WARNING: Ignoring value of HEAD from the environment. Use command line variables instead." >&2;}
+      fi
+      # Try to locate tool using the code snippet
+      for ac_prog in head
+do
+  # Extract the first word of "$ac_prog", so it can be a program name with args.
+set dummy $ac_prog; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_path_HEAD+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $HEAD in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_HEAD="$HEAD" # Let the user override the test with a path.
+  ;;
+  *)
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_path_HEAD="$as_dir/$ac_word$ac_exec_ext"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+  ;;
+esac
+fi
+HEAD=$ac_cv_path_HEAD
+if test -n "$HEAD"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $HEAD" >&5
+$as_echo "$HEAD" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+  test -n "$HEAD" && break
+done
+
+    else
+      # If it succeeded, then it was overridden by the user. We will use it
+      # for the tool.
+
+      # First remove it from the list of overridden variables, so we can test
+      # for unknown variables in the end.
+      CONFIGURE_OVERRIDDEN_VARIABLES="$try_remove_var"
+
+      # Check if the provided tool contains a complete path.
+      tool_specified="$HEAD"
+      tool_basename="${tool_specified##*/}"
+      if test "x$tool_basename" = "x$tool_specified"; then
+        # A command without a complete path is provided, search $PATH.
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool HEAD=$tool_basename" >&5
+$as_echo "$as_me: Will search for user supplied tool HEAD=$tool_basename" >&6;}
+        # Extract the first word of "$tool_basename", so it can be a program name with args.
+set dummy $tool_basename; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_path_HEAD+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $HEAD in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_HEAD="$HEAD" # Let the user override the test with a path.
+  ;;
+  *)
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_path_HEAD="$as_dir/$ac_word$ac_exec_ext"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+  ;;
+esac
+fi
+HEAD=$ac_cv_path_HEAD
+if test -n "$HEAD"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $HEAD" >&5
+$as_echo "$HEAD" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+        if test "x$HEAD" = x; then
+          as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
+        fi
+      else
+        # Otherwise we believe it is a complete path. Use it as it is.
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool HEAD=$tool_specified" >&5
+$as_echo "$as_me: Will use user supplied tool HEAD=$tool_specified" >&6;}
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for HEAD" >&5
+$as_echo_n "checking for HEAD... " >&6; }
+        if test ! -x "$tool_specified"; then
+          { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
+$as_echo "not found" >&6; }
+          as_fn_error $? "User supplied tool HEAD=$tool_specified does not exist or is not executable" "$LINENO" 5
+        fi
+        { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
+$as_echo "$tool_specified" >&6; }
+      fi
+    fi
+  fi
+
+
 
   if test "x$HEAD" = x; then
-    if test "xhead" = x; then
-      PROG_NAME=head
-    else
-      PROG_NAME=head
-    fi
-    { $as_echo "$as_me:${as_lineno-$LINENO}: Could not find $PROG_NAME!" >&5
-$as_echo "$as_me: Could not find $PROG_NAME!" >&6;}
-    as_fn_error $? "Cannot continue" "$LINENO" 5
-  fi
-
-
-
-  for ac_prog in ln
+    as_fn_error $? "Could not find required tool for HEAD" "$LINENO" 5
+  fi
+
+
+
+
+
+  # Publish this variable in the help.
+
+
+  if test "x$LN" = x; then
+    # The variable is not set by user, try to locate tool using the code snippet
+    for ac_prog in ln
+do
+  # Extract the first word of "$ac_prog", so it can be a program name with args.
+set dummy $ac_prog; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_path_LN+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $LN in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_LN="$LN" # Let the user override the test with a path.
+  ;;
+  *)
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_path_LN="$as_dir/$ac_word$ac_exec_ext"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+  ;;
+esac
+fi
+LN=$ac_cv_path_LN
+if test -n "$LN"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $LN" >&5
+$as_echo "$LN" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+  test -n "$LN" && break
+done
+
+  else
+    # The variable is set, but is it from the command line or the environment?
+
+    # Try to remove the string !LN! from our list.
+    try_remove_var=${CONFIGURE_OVERRIDDEN_VARIABLES//!LN!/}
+    if test "x$try_remove_var" = "x$CONFIGURE_OVERRIDDEN_VARIABLES"; then
+      # If it failed, the variable was not from the command line. Ignore it,
+      # but warn the user (except for BASH, which is always set by the calling BASH).
+      if test "xLN" != xBASH; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: Ignoring value of LN from the environment. Use command line variables instead." >&5
+$as_echo "$as_me: WARNING: Ignoring value of LN from the environment. Use command line variables instead." >&2;}
+      fi
+      # Try to locate tool using the code snippet
+      for ac_prog in ln
 do
   # Extract the first word of "$ac_prog", so it can be a program name with args.
 set dummy $ac_prog; ac_word=$2
@@ -4948,21 +7456,155 @@
   test -n "$LN" && break
 done
 
+    else
+      # If it succeeded, then it was overridden by the user. We will use it
+      # for the tool.
+
+      # First remove it from the list of overridden variables, so we can test
+      # for unknown variables in the end.
+      CONFIGURE_OVERRIDDEN_VARIABLES="$try_remove_var"
+
+      # Check if the provided tool contains a complete path.
+      tool_specified="$LN"
+      tool_basename="${tool_specified##*/}"
+      if test "x$tool_basename" = "x$tool_specified"; then
+        # A command without a complete path is provided, search $PATH.
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool LN=$tool_basename" >&5
+$as_echo "$as_me: Will search for user supplied tool LN=$tool_basename" >&6;}
+        # Extract the first word of "$tool_basename", so it can be a program name with args.
+set dummy $tool_basename; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_path_LN+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $LN in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_LN="$LN" # Let the user override the test with a path.
+  ;;
+  *)
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_path_LN="$as_dir/$ac_word$ac_exec_ext"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+  ;;
+esac
+fi
+LN=$ac_cv_path_LN
+if test -n "$LN"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $LN" >&5
+$as_echo "$LN" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+        if test "x$LN" = x; then
+          as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
+        fi
+      else
+        # Otherwise we believe it is a complete path. Use it as it is.
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool LN=$tool_specified" >&5
+$as_echo "$as_me: Will use user supplied tool LN=$tool_specified" >&6;}
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for LN" >&5
+$as_echo_n "checking for LN... " >&6; }
+        if test ! -x "$tool_specified"; then
+          { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
+$as_echo "not found" >&6; }
+          as_fn_error $? "User supplied tool LN=$tool_specified does not exist or is not executable" "$LINENO" 5
+        fi
+        { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
+$as_echo "$tool_specified" >&6; }
+      fi
+    fi
+  fi
+
+
 
   if test "x$LN" = x; then
-    if test "xln" = x; then
-      PROG_NAME=ln
-    else
-      PROG_NAME=ln
-    fi
-    { $as_echo "$as_me:${as_lineno-$LINENO}: Could not find $PROG_NAME!" >&5
-$as_echo "$as_me: Could not find $PROG_NAME!" >&6;}
-    as_fn_error $? "Cannot continue" "$LINENO" 5
-  fi
-
-
-
-  for ac_prog in ls
+    as_fn_error $? "Could not find required tool for LN" "$LINENO" 5
+  fi
+
+
+
+
+
+  # Publish this variable in the help.
+
+
+  if test "x$LS" = x; then
+    # The variable is not set by user, try to locate tool using the code snippet
+    for ac_prog in ls
+do
+  # Extract the first word of "$ac_prog", so it can be a program name with args.
+set dummy $ac_prog; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_path_LS+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $LS in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_LS="$LS" # Let the user override the test with a path.
+  ;;
+  *)
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_path_LS="$as_dir/$ac_word$ac_exec_ext"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+  ;;
+esac
+fi
+LS=$ac_cv_path_LS
+if test -n "$LS"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $LS" >&5
+$as_echo "$LS" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+  test -n "$LS" && break
+done
+
+  else
+    # The variable is set, but is it from the command line or the environment?
+
+    # Try to remove the string !LS! from our list.
+    try_remove_var=${CONFIGURE_OVERRIDDEN_VARIABLES//!LS!/}
+    if test "x$try_remove_var" = "x$CONFIGURE_OVERRIDDEN_VARIABLES"; then
+      # If it failed, the variable was not from the command line. Ignore it,
+      # but warn the user (except for BASH, which is always set by the calling BASH).
+      if test "xLS" != xBASH; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: Ignoring value of LS from the environment. Use command line variables instead." >&5
+$as_echo "$as_me: WARNING: Ignoring value of LS from the environment. Use command line variables instead." >&2;}
+      fi
+      # Try to locate tool using the code snippet
+      for ac_prog in ls
 do
   # Extract the first word of "$ac_prog", so it can be a program name with args.
 set dummy $ac_prog; ac_word=$2
@@ -5007,21 +7649,155 @@
   test -n "$LS" && break
 done
 
+    else
+      # If it succeeded, then it was overridden by the user. We will use it
+      # for the tool.
+
+      # First remove it from the list of overridden variables, so we can test
+      # for unknown variables in the end.
+      CONFIGURE_OVERRIDDEN_VARIABLES="$try_remove_var"
+
+      # Check if the provided tool contains a complete path.
+      tool_specified="$LS"
+      tool_basename="${tool_specified##*/}"
+      if test "x$tool_basename" = "x$tool_specified"; then
+        # A command without a complete path is provided, search $PATH.
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool LS=$tool_basename" >&5
+$as_echo "$as_me: Will search for user supplied tool LS=$tool_basename" >&6;}
+        # Extract the first word of "$tool_basename", so it can be a program name with args.
+set dummy $tool_basename; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_path_LS+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $LS in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_LS="$LS" # Let the user override the test with a path.
+  ;;
+  *)
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_path_LS="$as_dir/$ac_word$ac_exec_ext"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+  ;;
+esac
+fi
+LS=$ac_cv_path_LS
+if test -n "$LS"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $LS" >&5
+$as_echo "$LS" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+        if test "x$LS" = x; then
+          as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
+        fi
+      else
+        # Otherwise we believe it is a complete path. Use it as it is.
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool LS=$tool_specified" >&5
+$as_echo "$as_me: Will use user supplied tool LS=$tool_specified" >&6;}
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for LS" >&5
+$as_echo_n "checking for LS... " >&6; }
+        if test ! -x "$tool_specified"; then
+          { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
+$as_echo "not found" >&6; }
+          as_fn_error $? "User supplied tool LS=$tool_specified does not exist or is not executable" "$LINENO" 5
+        fi
+        { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
+$as_echo "$tool_specified" >&6; }
+      fi
+    fi
+  fi
+
+
 
   if test "x$LS" = x; then
-    if test "xls" = x; then
-      PROG_NAME=ls
-    else
-      PROG_NAME=ls
-    fi
-    { $as_echo "$as_me:${as_lineno-$LINENO}: Could not find $PROG_NAME!" >&5
-$as_echo "$as_me: Could not find $PROG_NAME!" >&6;}
-    as_fn_error $? "Cannot continue" "$LINENO" 5
-  fi
-
-
-
-  for ac_prog in mkdir
+    as_fn_error $? "Could not find required tool for LS" "$LINENO" 5
+  fi
+
+
+
+
+
+  # Publish this variable in the help.
+
+
+  if test "x$MKDIR" = x; then
+    # The variable is not set by user, try to locate tool using the code snippet
+    for ac_prog in mkdir
+do
+  # Extract the first word of "$ac_prog", so it can be a program name with args.
+set dummy $ac_prog; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_path_MKDIR+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $MKDIR in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_MKDIR="$MKDIR" # Let the user override the test with a path.
+  ;;
+  *)
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_path_MKDIR="$as_dir/$ac_word$ac_exec_ext"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+  ;;
+esac
+fi
+MKDIR=$ac_cv_path_MKDIR
+if test -n "$MKDIR"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $MKDIR" >&5
+$as_echo "$MKDIR" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+  test -n "$MKDIR" && break
+done
+
+  else
+    # The variable is set, but is it from the command line or the environment?
+
+    # Try to remove the string !MKDIR! from our list.
+    try_remove_var=${CONFIGURE_OVERRIDDEN_VARIABLES//!MKDIR!/}
+    if test "x$try_remove_var" = "x$CONFIGURE_OVERRIDDEN_VARIABLES"; then
+      # If it failed, the variable was not from the command line. Ignore it,
+      # but warn the user (except for BASH, which is always set by the calling BASH).
+      if test "xMKDIR" != xBASH; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: Ignoring value of MKDIR from the environment. Use command line variables instead." >&5
+$as_echo "$as_me: WARNING: Ignoring value of MKDIR from the environment. Use command line variables instead." >&2;}
+      fi
+      # Try to locate tool using the code snippet
+      for ac_prog in mkdir
 do
   # Extract the first word of "$ac_prog", so it can be a program name with args.
 set dummy $ac_prog; ac_word=$2
@@ -5066,21 +7842,97 @@
   test -n "$MKDIR" && break
 done
 
+    else
+      # If it succeeded, then it was overridden by the user. We will use it
+      # for the tool.
+
+      # First remove it from the list of overridden variables, so we can test
+      # for unknown variables in the end.
+      CONFIGURE_OVERRIDDEN_VARIABLES="$try_remove_var"
+
+      # Check if the provided tool contains a complete path.
+      tool_specified="$MKDIR"
+      tool_basename="${tool_specified##*/}"
+      if test "x$tool_basename" = "x$tool_specified"; then
+        # A command without a complete path is provided, search $PATH.
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool MKDIR=$tool_basename" >&5
+$as_echo "$as_me: Will search for user supplied tool MKDIR=$tool_basename" >&6;}
+        # Extract the first word of "$tool_basename", so it can be a program name with args.
+set dummy $tool_basename; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_path_MKDIR+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $MKDIR in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_MKDIR="$MKDIR" # Let the user override the test with a path.
+  ;;
+  *)
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_path_MKDIR="$as_dir/$ac_word$ac_exec_ext"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+  ;;
+esac
+fi
+MKDIR=$ac_cv_path_MKDIR
+if test -n "$MKDIR"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $MKDIR" >&5
+$as_echo "$MKDIR" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+        if test "x$MKDIR" = x; then
+          as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
+        fi
+      else
+        # Otherwise we believe it is a complete path. Use it as it is.
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool MKDIR=$tool_specified" >&5
+$as_echo "$as_me: Will use user supplied tool MKDIR=$tool_specified" >&6;}
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for MKDIR" >&5
+$as_echo_n "checking for MKDIR... " >&6; }
+        if test ! -x "$tool_specified"; then
+          { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
+$as_echo "not found" >&6; }
+          as_fn_error $? "User supplied tool MKDIR=$tool_specified does not exist or is not executable" "$LINENO" 5
+        fi
+        { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
+$as_echo "$tool_specified" >&6; }
+      fi
+    fi
+  fi
+
+
 
   if test "x$MKDIR" = x; then
-    if test "xmkdir" = x; then
-      PROG_NAME=mkdir
-    else
-      PROG_NAME=mkdir
-    fi
-    { $as_echo "$as_me:${as_lineno-$LINENO}: Could not find $PROG_NAME!" >&5
-$as_echo "$as_me: Could not find $PROG_NAME!" >&6;}
-    as_fn_error $? "Cannot continue" "$LINENO" 5
-  fi
-
-
-
-  for ac_prog in mktemp
+    as_fn_error $? "Could not find required tool for MKDIR" "$LINENO" 5
+  fi
+
+
+
+
+
+  # Publish this variable in the help.
+
+
+  if test "x$MKTEMP" = x; then
+    # The variable is not set by user, try to locate tool using the code snippet
+    for ac_prog in mktemp
 do
   # Extract the first word of "$ac_prog", so it can be a program name with args.
 set dummy $ac_prog; ac_word=$2
@@ -5125,21 +7977,213 @@
   test -n "$MKTEMP" && break
 done
 
+  else
+    # The variable is set, but is it from the command line or the environment?
+
+    # Try to remove the string !MKTEMP! from our list.
+    try_remove_var=${CONFIGURE_OVERRIDDEN_VARIABLES//!MKTEMP!/}
+    if test "x$try_remove_var" = "x$CONFIGURE_OVERRIDDEN_VARIABLES"; then
+      # If it failed, the variable was not from the command line. Ignore it,
+      # but warn the user (except for BASH, which is always set by the calling BASH).
+      if test "xMKTEMP" != xBASH; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: Ignoring value of MKTEMP from the environment. Use command line variables instead." >&5
+$as_echo "$as_me: WARNING: Ignoring value of MKTEMP from the environment. Use command line variables instead." >&2;}
+      fi
+      # Try to locate tool using the code snippet
+      for ac_prog in mktemp
+do
+  # Extract the first word of "$ac_prog", so it can be a program name with args.
+set dummy $ac_prog; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_path_MKTEMP+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $MKTEMP in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_MKTEMP="$MKTEMP" # Let the user override the test with a path.
+  ;;
+  *)
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_path_MKTEMP="$as_dir/$ac_word$ac_exec_ext"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+  ;;
+esac
+fi
+MKTEMP=$ac_cv_path_MKTEMP
+if test -n "$MKTEMP"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $MKTEMP" >&5
+$as_echo "$MKTEMP" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+  test -n "$MKTEMP" && break
+done
+
+    else
+      # If it succeeded, then it was overridden by the user. We will use it
+      # for the tool.
+
+      # First remove it from the list of overridden variables, so we can test
+      # for unknown variables in the end.
+      CONFIGURE_OVERRIDDEN_VARIABLES="$try_remove_var"
+
+      # Check if the provided tool contains a complete path.
+      tool_specified="$MKTEMP"
+      tool_basename="${tool_specified##*/}"
+      if test "x$tool_basename" = "x$tool_specified"; then
+        # A command without a complete path is provided, search $PATH.
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool MKTEMP=$tool_basename" >&5
+$as_echo "$as_me: Will search for user supplied tool MKTEMP=$tool_basename" >&6;}
+        # Extract the first word of "$tool_basename", so it can be a program name with args.
+set dummy $tool_basename; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_path_MKTEMP+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $MKTEMP in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_MKTEMP="$MKTEMP" # Let the user override the test with a path.
+  ;;
+  *)
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_path_MKTEMP="$as_dir/$ac_word$ac_exec_ext"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+  ;;
+esac
+fi
+MKTEMP=$ac_cv_path_MKTEMP
+if test -n "$MKTEMP"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $MKTEMP" >&5
+$as_echo "$MKTEMP" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+        if test "x$MKTEMP" = x; then
+          as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
+        fi
+      else
+        # Otherwise we believe it is a complete path. Use it as it is.
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool MKTEMP=$tool_specified" >&5
+$as_echo "$as_me: Will use user supplied tool MKTEMP=$tool_specified" >&6;}
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for MKTEMP" >&5
+$as_echo_n "checking for MKTEMP... " >&6; }
+        if test ! -x "$tool_specified"; then
+          { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
+$as_echo "not found" >&6; }
+          as_fn_error $? "User supplied tool MKTEMP=$tool_specified does not exist or is not executable" "$LINENO" 5
+        fi
+        { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
+$as_echo "$tool_specified" >&6; }
+      fi
+    fi
+  fi
+
+
 
   if test "x$MKTEMP" = x; then
-    if test "xmktemp" = x; then
-      PROG_NAME=mktemp
-    else
-      PROG_NAME=mktemp
-    fi
-    { $as_echo "$as_me:${as_lineno-$LINENO}: Could not find $PROG_NAME!" >&5
-$as_echo "$as_me: Could not find $PROG_NAME!" >&6;}
-    as_fn_error $? "Cannot continue" "$LINENO" 5
-  fi
-
-
-
-  for ac_prog in mv
+    as_fn_error $? "Could not find required tool for MKTEMP" "$LINENO" 5
+  fi
+
+
+
+
+
+  # Publish this variable in the help.
+
+
+  if test "x$MV" = x; then
+    # The variable is not set by user, try to locate tool using the code snippet
+    for ac_prog in mv
+do
+  # Extract the first word of "$ac_prog", so it can be a program name with args.
+set dummy $ac_prog; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_path_MV+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $MV in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_MV="$MV" # Let the user override the test with a path.
+  ;;
+  *)
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_path_MV="$as_dir/$ac_word$ac_exec_ext"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+  ;;
+esac
+fi
+MV=$ac_cv_path_MV
+if test -n "$MV"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $MV" >&5
+$as_echo "$MV" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+  test -n "$MV" && break
+done
+
+  else
+    # The variable is set, but is it from the command line or the environment?
+
+    # Try to remove the string !MV! from our list.
+    try_remove_var=${CONFIGURE_OVERRIDDEN_VARIABLES//!MV!/}
+    if test "x$try_remove_var" = "x$CONFIGURE_OVERRIDDEN_VARIABLES"; then
+      # If it failed, the variable was not from the command line. Ignore it,
+      # but warn the user (except for BASH, which is always set by the calling BASH).
+      if test "xMV" != xBASH; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: Ignoring value of MV from the environment. Use command line variables instead." >&5
+$as_echo "$as_me: WARNING: Ignoring value of MV from the environment. Use command line variables instead." >&2;}
+      fi
+      # Try to locate tool using the code snippet
+      for ac_prog in mv
 do
   # Extract the first word of "$ac_prog", so it can be a program name with args.
 set dummy $ac_prog; ac_word=$2
@@ -5184,21 +8228,290 @@
   test -n "$MV" && break
 done
 
+    else
+      # If it succeeded, then it was overridden by the user. We will use it
+      # for the tool.
+
+      # First remove it from the list of overridden variables, so we can test
+      # for unknown variables in the end.
+      CONFIGURE_OVERRIDDEN_VARIABLES="$try_remove_var"
+
+      # Check if the provided tool contains a complete path.
+      tool_specified="$MV"
+      tool_basename="${tool_specified##*/}"
+      if test "x$tool_basename" = "x$tool_specified"; then
+        # A command without a complete path is provided, search $PATH.
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool MV=$tool_basename" >&5
+$as_echo "$as_me: Will search for user supplied tool MV=$tool_basename" >&6;}
+        # Extract the first word of "$tool_basename", so it can be a program name with args.
+set dummy $tool_basename; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_path_MV+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $MV in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_MV="$MV" # Let the user override the test with a path.
+  ;;
+  *)
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_path_MV="$as_dir/$ac_word$ac_exec_ext"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+  ;;
+esac
+fi
+MV=$ac_cv_path_MV
+if test -n "$MV"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $MV" >&5
+$as_echo "$MV" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+        if test "x$MV" = x; then
+          as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
+        fi
+      else
+        # Otherwise we believe it is a complete path. Use it as it is.
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool MV=$tool_specified" >&5
+$as_echo "$as_me: Will use user supplied tool MV=$tool_specified" >&6;}
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for MV" >&5
+$as_echo_n "checking for MV... " >&6; }
+        if test ! -x "$tool_specified"; then
+          { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
+$as_echo "not found" >&6; }
+          as_fn_error $? "User supplied tool MV=$tool_specified does not exist or is not executable" "$LINENO" 5
+        fi
+        { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
+$as_echo "$tool_specified" >&6; }
+      fi
+    fi
+  fi
+
+
 
   if test "x$MV" = x; then
-    if test "xmv" = x; then
-      PROG_NAME=mv
-    else
-      PROG_NAME=mv
-    fi
-    { $as_echo "$as_me:${as_lineno-$LINENO}: Could not find $PROG_NAME!" >&5
-$as_echo "$as_me: Could not find $PROG_NAME!" >&6;}
-    as_fn_error $? "Cannot continue" "$LINENO" 5
-  fi
-
-
-
-  for ac_prog in printf
+    as_fn_error $? "Could not find required tool for MV" "$LINENO" 5
+  fi
+
+
+
+
+
+  # Publish this variable in the help.
+
+
+  if test "x$NAWK" = x; then
+    # The variable is not set by user, try to locate tool using the code snippet
+    for ac_prog in nawk gawk awk
+do
+  # Extract the first word of "$ac_prog", so it can be a program name with args.
+set dummy $ac_prog; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_path_NAWK+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $NAWK in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_NAWK="$NAWK" # Let the user override the test with a path.
+  ;;
+  *)
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_path_NAWK="$as_dir/$ac_word$ac_exec_ext"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+  ;;
+esac
+fi
+NAWK=$ac_cv_path_NAWK
+if test -n "$NAWK"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $NAWK" >&5
+$as_echo "$NAWK" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+  test -n "$NAWK" && break
+done
+
+  else
+    # The variable is set, but is it from the command line or the environment?
+
+    # Try to remove the string !NAWK! from our list.
+    try_remove_var=${CONFIGURE_OVERRIDDEN_VARIABLES//!NAWK!/}
+    if test "x$try_remove_var" = "x$CONFIGURE_OVERRIDDEN_VARIABLES"; then
+      # If it failed, the variable was not from the command line. Ignore it,
+      # but warn the user (except for BASH, which is always set by the calling BASH).
+      if test "xNAWK" != xBASH; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: Ignoring value of NAWK from the environment. Use command line variables instead." >&5
+$as_echo "$as_me: WARNING: Ignoring value of NAWK from the environment. Use command line variables instead." >&2;}
+      fi
+      # Try to locate tool using the code snippet
+      for ac_prog in nawk gawk awk
+do
+  # Extract the first word of "$ac_prog", so it can be a program name with args.
+set dummy $ac_prog; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_path_NAWK+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $NAWK in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_NAWK="$NAWK" # Let the user override the test with a path.
+  ;;
+  *)
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_path_NAWK="$as_dir/$ac_word$ac_exec_ext"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+  ;;
+esac
+fi
+NAWK=$ac_cv_path_NAWK
+if test -n "$NAWK"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $NAWK" >&5
+$as_echo "$NAWK" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+  test -n "$NAWK" && break
+done
+
+    else
+      # If it succeeded, then it was overridden by the user. We will use it
+      # for the tool.
+
+      # First remove it from the list of overridden variables, so we can test
+      # for unknown variables in the end.
+      CONFIGURE_OVERRIDDEN_VARIABLES="$try_remove_var"
+
+      # Check if the provided tool contains a complete path.
+      tool_specified="$NAWK"
+      tool_basename="${tool_specified##*/}"
+      if test "x$tool_basename" = "x$tool_specified"; then
+        # A command without a complete path is provided, search $PATH.
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool NAWK=$tool_basename" >&5
+$as_echo "$as_me: Will search for user supplied tool NAWK=$tool_basename" >&6;}
+        # Extract the first word of "$tool_basename", so it can be a program name with args.
+set dummy $tool_basename; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_path_NAWK+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $NAWK in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_NAWK="$NAWK" # Let the user override the test with a path.
+  ;;
+  *)
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_path_NAWK="$as_dir/$ac_word$ac_exec_ext"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+  ;;
+esac
+fi
+NAWK=$ac_cv_path_NAWK
+if test -n "$NAWK"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $NAWK" >&5
+$as_echo "$NAWK" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+        if test "x$NAWK" = x; then
+          as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
+        fi
+      else
+        # Otherwise we believe it is a complete path. Use it as it is.
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool NAWK=$tool_specified" >&5
+$as_echo "$as_me: Will use user supplied tool NAWK=$tool_specified" >&6;}
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for NAWK" >&5
+$as_echo_n "checking for NAWK... " >&6; }
+        if test ! -x "$tool_specified"; then
+          { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
+$as_echo "not found" >&6; }
+          as_fn_error $? "User supplied tool NAWK=$tool_specified does not exist or is not executable" "$LINENO" 5
+        fi
+        { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
+$as_echo "$tool_specified" >&6; }
+      fi
+    fi
+  fi
+
+
+
+  if test "x$NAWK" = x; then
+    as_fn_error $? "Could not find required tool for NAWK" "$LINENO" 5
+  fi
+
+
+
+
+
+  # Publish this variable in the help.
+
+
+  if test "x$PRINTF" = x; then
+    # The variable is not set by user, try to locate tool using the code snippet
+    for ac_prog in printf
 do
   # Extract the first word of "$ac_prog", so it can be a program name with args.
 set dummy $ac_prog; ac_word=$2
@@ -5243,21 +8556,155 @@
   test -n "$PRINTF" && break
 done
 
+  else
+    # The variable is set, but is it from the command line or the environment?
+
+    # Try to remove the string !PRINTF! from our list.
+    try_remove_var=${CONFIGURE_OVERRIDDEN_VARIABLES//!PRINTF!/}
+    if test "x$try_remove_var" = "x$CONFIGURE_OVERRIDDEN_VARIABLES"; then
+      # If it failed, the variable was not from the command line. Ignore it,
+      # but warn the user (except for BASH, which is always set by the calling BASH).
+      if test "xPRINTF" != xBASH; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: Ignoring value of PRINTF from the environment. Use command line variables instead." >&5
+$as_echo "$as_me: WARNING: Ignoring value of PRINTF from the environment. Use command line variables instead." >&2;}
+      fi
+      # Try to locate tool using the code snippet
+      for ac_prog in printf
+do
+  # Extract the first word of "$ac_prog", so it can be a program name with args.
+set dummy $ac_prog; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_path_PRINTF+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $PRINTF in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_PRINTF="$PRINTF" # Let the user override the test with a path.
+  ;;
+  *)
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_path_PRINTF="$as_dir/$ac_word$ac_exec_ext"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+  ;;
+esac
+fi
+PRINTF=$ac_cv_path_PRINTF
+if test -n "$PRINTF"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $PRINTF" >&5
+$as_echo "$PRINTF" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+  test -n "$PRINTF" && break
+done
+
+    else
+      # If it succeeded, then it was overridden by the user. We will use it
+      # for the tool.
+
+      # First remove it from the list of overridden variables, so we can test
+      # for unknown variables in the end.
+      CONFIGURE_OVERRIDDEN_VARIABLES="$try_remove_var"
+
+      # Check if the provided tool contains a complete path.
+      tool_specified="$PRINTF"
+      tool_basename="${tool_specified##*/}"
+      if test "x$tool_basename" = "x$tool_specified"; then
+        # A command without a complete path is provided, search $PATH.
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool PRINTF=$tool_basename" >&5
+$as_echo "$as_me: Will search for user supplied tool PRINTF=$tool_basename" >&6;}
+        # Extract the first word of "$tool_basename", so it can be a program name with args.
+set dummy $tool_basename; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_path_PRINTF+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $PRINTF in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_PRINTF="$PRINTF" # Let the user override the test with a path.
+  ;;
+  *)
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_path_PRINTF="$as_dir/$ac_word$ac_exec_ext"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+  ;;
+esac
+fi
+PRINTF=$ac_cv_path_PRINTF
+if test -n "$PRINTF"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $PRINTF" >&5
+$as_echo "$PRINTF" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+        if test "x$PRINTF" = x; then
+          as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
+        fi
+      else
+        # Otherwise we believe it is a complete path. Use it as it is.
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool PRINTF=$tool_specified" >&5
+$as_echo "$as_me: Will use user supplied tool PRINTF=$tool_specified" >&6;}
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for PRINTF" >&5
+$as_echo_n "checking for PRINTF... " >&6; }
+        if test ! -x "$tool_specified"; then
+          { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
+$as_echo "not found" >&6; }
+          as_fn_error $? "User supplied tool PRINTF=$tool_specified does not exist or is not executable" "$LINENO" 5
+        fi
+        { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
+$as_echo "$tool_specified" >&6; }
+      fi
+    fi
+  fi
+
+
 
   if test "x$PRINTF" = x; then
-    if test "xprintf" = x; then
-      PROG_NAME=printf
-    else
-      PROG_NAME=printf
-    fi
-    { $as_echo "$as_me:${as_lineno-$LINENO}: Could not find $PROG_NAME!" >&5
-$as_echo "$as_me: Could not find $PROG_NAME!" >&6;}
-    as_fn_error $? "Cannot continue" "$LINENO" 5
-  fi
-
-
-
-  for ac_prog in rm
+    as_fn_error $? "Could not find required tool for PRINTF" "$LINENO" 5
+  fi
+
+
+
+
+
+  # Publish this variable in the help.
+
+
+  if test "x$RM" = x; then
+    # The variable is not set by user, try to locate tool using the code snippet
+    for ac_prog in rm
 do
   # Extract the first word of "$ac_prog", so it can be a program name with args.
 set dummy $ac_prog; ac_word=$2
@@ -5302,21 +8749,213 @@
   test -n "$RM" && break
 done
 
+  else
+    # The variable is set, but is it from the command line or the environment?
+
+    # Try to remove the string !RM! from our list.
+    try_remove_var=${CONFIGURE_OVERRIDDEN_VARIABLES//!RM!/}
+    if test "x$try_remove_var" = "x$CONFIGURE_OVERRIDDEN_VARIABLES"; then
+      # If it failed, the variable was not from the command line. Ignore it,
+      # but warn the user (except for BASH, which is always set by the calling BASH).
+      if test "xRM" != xBASH; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: Ignoring value of RM from the environment. Use command line variables instead." >&5
+$as_echo "$as_me: WARNING: Ignoring value of RM from the environment. Use command line variables instead." >&2;}
+      fi
+      # Try to locate tool using the code snippet
+      for ac_prog in rm
+do
+  # Extract the first word of "$ac_prog", so it can be a program name with args.
+set dummy $ac_prog; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_path_RM+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $RM in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_RM="$RM" # Let the user override the test with a path.
+  ;;
+  *)
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_path_RM="$as_dir/$ac_word$ac_exec_ext"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+  ;;
+esac
+fi
+RM=$ac_cv_path_RM
+if test -n "$RM"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $RM" >&5
+$as_echo "$RM" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+  test -n "$RM" && break
+done
+
+    else
+      # If it succeeded, then it was overridden by the user. We will use it
+      # for the tool.
+
+      # First remove it from the list of overridden variables, so we can test
+      # for unknown variables in the end.
+      CONFIGURE_OVERRIDDEN_VARIABLES="$try_remove_var"
+
+      # Check if the provided tool contains a complete path.
+      tool_specified="$RM"
+      tool_basename="${tool_specified##*/}"
+      if test "x$tool_basename" = "x$tool_specified"; then
+        # A command without a complete path is provided, search $PATH.
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool RM=$tool_basename" >&5
+$as_echo "$as_me: Will search for user supplied tool RM=$tool_basename" >&6;}
+        # Extract the first word of "$tool_basename", so it can be a program name with args.
+set dummy $tool_basename; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_path_RM+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $RM in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_RM="$RM" # Let the user override the test with a path.
+  ;;
+  *)
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_path_RM="$as_dir/$ac_word$ac_exec_ext"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+  ;;
+esac
+fi
+RM=$ac_cv_path_RM
+if test -n "$RM"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $RM" >&5
+$as_echo "$RM" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+        if test "x$RM" = x; then
+          as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
+        fi
+      else
+        # Otherwise we believe it is a complete path. Use it as it is.
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool RM=$tool_specified" >&5
+$as_echo "$as_me: Will use user supplied tool RM=$tool_specified" >&6;}
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for RM" >&5
+$as_echo_n "checking for RM... " >&6; }
+        if test ! -x "$tool_specified"; then
+          { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
+$as_echo "not found" >&6; }
+          as_fn_error $? "User supplied tool RM=$tool_specified does not exist or is not executable" "$LINENO" 5
+        fi
+        { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
+$as_echo "$tool_specified" >&6; }
+      fi
+    fi
+  fi
+
+
 
   if test "x$RM" = x; then
-    if test "xrm" = x; then
-      PROG_NAME=rm
-    else
-      PROG_NAME=rm
-    fi
-    { $as_echo "$as_me:${as_lineno-$LINENO}: Could not find $PROG_NAME!" >&5
-$as_echo "$as_me: Could not find $PROG_NAME!" >&6;}
-    as_fn_error $? "Cannot continue" "$LINENO" 5
-  fi
-
-
-
-  for ac_prog in sh
+    as_fn_error $? "Could not find required tool for RM" "$LINENO" 5
+  fi
+
+
+
+
+
+  # Publish this variable in the help.
+
+
+  if test "x$SH" = x; then
+    # The variable is not set by user, try to locate tool using the code snippet
+    for ac_prog in sh
+do
+  # Extract the first word of "$ac_prog", so it can be a program name with args.
+set dummy $ac_prog; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_path_SH+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $SH in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_SH="$SH" # Let the user override the test with a path.
+  ;;
+  *)
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_path_SH="$as_dir/$ac_word$ac_exec_ext"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+  ;;
+esac
+fi
+SH=$ac_cv_path_SH
+if test -n "$SH"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $SH" >&5
+$as_echo "$SH" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+  test -n "$SH" && break
+done
+
+  else
+    # The variable is set, but is it from the command line or the environment?
+
+    # Try to remove the string !SH! from our list.
+    try_remove_var=${CONFIGURE_OVERRIDDEN_VARIABLES//!SH!/}
+    if test "x$try_remove_var" = "x$CONFIGURE_OVERRIDDEN_VARIABLES"; then
+      # If it failed, the variable was not from the command line. Ignore it,
+      # but warn the user (except for BASH, which is always set by the calling BASH).
+      if test "xSH" != xBASH; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: Ignoring value of SH from the environment. Use command line variables instead." >&5
+$as_echo "$as_me: WARNING: Ignoring value of SH from the environment. Use command line variables instead." >&2;}
+      fi
+      # Try to locate tool using the code snippet
+      for ac_prog in sh
 do
   # Extract the first word of "$ac_prog", so it can be a program name with args.
 set dummy $ac_prog; ac_word=$2
@@ -5361,21 +9000,97 @@
   test -n "$SH" && break
 done
 
+    else
+      # If it succeeded, then it was overridden by the user. We will use it
+      # for the tool.
+
+      # First remove it from the list of overridden variables, so we can test
+      # for unknown variables in the end.
+      CONFIGURE_OVERRIDDEN_VARIABLES="$try_remove_var"
+
+      # Check if the provided tool contains a complete path.
+      tool_specified="$SH"
+      tool_basename="${tool_specified##*/}"
+      if test "x$tool_basename" = "x$tool_specified"; then
+        # A command without a complete path is provided, search $PATH.
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool SH=$tool_basename" >&5
+$as_echo "$as_me: Will search for user supplied tool SH=$tool_basename" >&6;}
+        # Extract the first word of "$tool_basename", so it can be a program name with args.
+set dummy $tool_basename; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_path_SH+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $SH in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_SH="$SH" # Let the user override the test with a path.
+  ;;
+  *)
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_path_SH="$as_dir/$ac_word$ac_exec_ext"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+  ;;
+esac
+fi
+SH=$ac_cv_path_SH
+if test -n "$SH"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $SH" >&5
+$as_echo "$SH" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+        if test "x$SH" = x; then
+          as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
+        fi
+      else
+        # Otherwise we believe it is a complete path. Use it as it is.
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool SH=$tool_specified" >&5
+$as_echo "$as_me: Will use user supplied tool SH=$tool_specified" >&6;}
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for SH" >&5
+$as_echo_n "checking for SH... " >&6; }
+        if test ! -x "$tool_specified"; then
+          { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
+$as_echo "not found" >&6; }
+          as_fn_error $? "User supplied tool SH=$tool_specified does not exist or is not executable" "$LINENO" 5
+        fi
+        { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
+$as_echo "$tool_specified" >&6; }
+      fi
+    fi
+  fi
+
+
 
   if test "x$SH" = x; then
-    if test "xsh" = x; then
-      PROG_NAME=sh
-    else
-      PROG_NAME=sh
-    fi
-    { $as_echo "$as_me:${as_lineno-$LINENO}: Could not find $PROG_NAME!" >&5
-$as_echo "$as_me: Could not find $PROG_NAME!" >&6;}
-    as_fn_error $? "Cannot continue" "$LINENO" 5
-  fi
-
-
-
-  for ac_prog in sort
+    as_fn_error $? "Could not find required tool for SH" "$LINENO" 5
+  fi
+
+
+
+
+
+  # Publish this variable in the help.
+
+
+  if test "x$SORT" = x; then
+    # The variable is not set by user, try to locate tool using the code snippet
+    for ac_prog in sort
 do
   # Extract the first word of "$ac_prog", so it can be a program name with args.
 set dummy $ac_prog; ac_word=$2
@@ -5420,21 +9135,213 @@
   test -n "$SORT" && break
 done
 
+  else
+    # The variable is set, but is it from the command line or the environment?
+
+    # Try to remove the string !SORT! from our list.
+    try_remove_var=${CONFIGURE_OVERRIDDEN_VARIABLES//!SORT!/}
+    if test "x$try_remove_var" = "x$CONFIGURE_OVERRIDDEN_VARIABLES"; then
+      # If it failed, the variable was not from the command line. Ignore it,
+      # but warn the user (except for BASH, which is always set by the calling BASH).
+      if test "xSORT" != xBASH; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: Ignoring value of SORT from the environment. Use command line variables instead." >&5
+$as_echo "$as_me: WARNING: Ignoring value of SORT from the environment. Use command line variables instead." >&2;}
+      fi
+      # Try to locate tool using the code snippet
+      for ac_prog in sort
+do
+  # Extract the first word of "$ac_prog", so it can be a program name with args.
+set dummy $ac_prog; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_path_SORT+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $SORT in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_SORT="$SORT" # Let the user override the test with a path.
+  ;;
+  *)
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_path_SORT="$as_dir/$ac_word$ac_exec_ext"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+  ;;
+esac
+fi
+SORT=$ac_cv_path_SORT
+if test -n "$SORT"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $SORT" >&5
+$as_echo "$SORT" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+  test -n "$SORT" && break
+done
+
+    else
+      # If it succeeded, then it was overridden by the user. We will use it
+      # for the tool.
+
+      # First remove it from the list of overridden variables, so we can test
+      # for unknown variables in the end.
+      CONFIGURE_OVERRIDDEN_VARIABLES="$try_remove_var"
+
+      # Check if the provided tool contains a complete path.
+      tool_specified="$SORT"
+      tool_basename="${tool_specified##*/}"
+      if test "x$tool_basename" = "x$tool_specified"; then
+        # A command without a complete path is provided, search $PATH.
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool SORT=$tool_basename" >&5
+$as_echo "$as_me: Will search for user supplied tool SORT=$tool_basename" >&6;}
+        # Extract the first word of "$tool_basename", so it can be a program name with args.
+set dummy $tool_basename; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_path_SORT+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $SORT in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_SORT="$SORT" # Let the user override the test with a path.
+  ;;
+  *)
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_path_SORT="$as_dir/$ac_word$ac_exec_ext"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+  ;;
+esac
+fi
+SORT=$ac_cv_path_SORT
+if test -n "$SORT"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $SORT" >&5
+$as_echo "$SORT" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+        if test "x$SORT" = x; then
+          as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
+        fi
+      else
+        # Otherwise we believe it is a complete path. Use it as it is.
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool SORT=$tool_specified" >&5
+$as_echo "$as_me: Will use user supplied tool SORT=$tool_specified" >&6;}
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for SORT" >&5
+$as_echo_n "checking for SORT... " >&6; }
+        if test ! -x "$tool_specified"; then
+          { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
+$as_echo "not found" >&6; }
+          as_fn_error $? "User supplied tool SORT=$tool_specified does not exist or is not executable" "$LINENO" 5
+        fi
+        { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
+$as_echo "$tool_specified" >&6; }
+      fi
+    fi
+  fi
+
+
 
   if test "x$SORT" = x; then
-    if test "xsort" = x; then
-      PROG_NAME=sort
-    else
-      PROG_NAME=sort
-    fi
-    { $as_echo "$as_me:${as_lineno-$LINENO}: Could not find $PROG_NAME!" >&5
-$as_echo "$as_me: Could not find $PROG_NAME!" >&6;}
-    as_fn_error $? "Cannot continue" "$LINENO" 5
-  fi
-
-
-
-  for ac_prog in tail
+    as_fn_error $? "Could not find required tool for SORT" "$LINENO" 5
+  fi
+
+
+
+
+
+  # Publish this variable in the help.
+
+
+  if test "x$TAIL" = x; then
+    # The variable is not set by user, try to locate tool using the code snippet
+    for ac_prog in tail
+do
+  # Extract the first word of "$ac_prog", so it can be a program name with args.
+set dummy $ac_prog; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_path_TAIL+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $TAIL in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_TAIL="$TAIL" # Let the user override the test with a path.
+  ;;
+  *)
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_path_TAIL="$as_dir/$ac_word$ac_exec_ext"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+  ;;
+esac
+fi
+TAIL=$ac_cv_path_TAIL
+if test -n "$TAIL"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $TAIL" >&5
+$as_echo "$TAIL" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+  test -n "$TAIL" && break
+done
+
+  else
+    # The variable is set, but is it from the command line or the environment?
+
+    # Try to remove the string !TAIL! from our list.
+    try_remove_var=${CONFIGURE_OVERRIDDEN_VARIABLES//!TAIL!/}
+    if test "x$try_remove_var" = "x$CONFIGURE_OVERRIDDEN_VARIABLES"; then
+      # If it failed, the variable was not from the command line. Ignore it,
+      # but warn the user (except for BASH, which is always set by the calling BASH).
+      if test "xTAIL" != xBASH; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: Ignoring value of TAIL from the environment. Use command line variables instead." >&5
+$as_echo "$as_me: WARNING: Ignoring value of TAIL from the environment. Use command line variables instead." >&2;}
+      fi
+      # Try to locate tool using the code snippet
+      for ac_prog in tail
 do
   # Extract the first word of "$ac_prog", so it can be a program name with args.
 set dummy $ac_prog; ac_word=$2
@@ -5479,21 +9386,97 @@
   test -n "$TAIL" && break
 done
 
+    else
+      # If it succeeded, then it was overridden by the user. We will use it
+      # for the tool.
+
+      # First remove it from the list of overridden variables, so we can test
+      # for unknown variables in the end.
+      CONFIGURE_OVERRIDDEN_VARIABLES="$try_remove_var"
+
+      # Check if the provided tool contains a complete path.
+      tool_specified="$TAIL"
+      tool_basename="${tool_specified##*/}"
+      if test "x$tool_basename" = "x$tool_specified"; then
+        # A command without a complete path is provided, search $PATH.
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool TAIL=$tool_basename" >&5
+$as_echo "$as_me: Will search for user supplied tool TAIL=$tool_basename" >&6;}
+        # Extract the first word of "$tool_basename", so it can be a program name with args.
+set dummy $tool_basename; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_path_TAIL+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $TAIL in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_TAIL="$TAIL" # Let the user override the test with a path.
+  ;;
+  *)
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_path_TAIL="$as_dir/$ac_word$ac_exec_ext"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+  ;;
+esac
+fi
+TAIL=$ac_cv_path_TAIL
+if test -n "$TAIL"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $TAIL" >&5
+$as_echo "$TAIL" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+        if test "x$TAIL" = x; then
+          as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
+        fi
+      else
+        # Otherwise we believe it is a complete path. Use it as it is.
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool TAIL=$tool_specified" >&5
+$as_echo "$as_me: Will use user supplied tool TAIL=$tool_specified" >&6;}
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for TAIL" >&5
+$as_echo_n "checking for TAIL... " >&6; }
+        if test ! -x "$tool_specified"; then
+          { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
+$as_echo "not found" >&6; }
+          as_fn_error $? "User supplied tool TAIL=$tool_specified does not exist or is not executable" "$LINENO" 5
+        fi
+        { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
+$as_echo "$tool_specified" >&6; }
+      fi
+    fi
+  fi
+
+
 
   if test "x$TAIL" = x; then
-    if test "xtail" = x; then
-      PROG_NAME=tail
-    else
-      PROG_NAME=tail
-    fi
-    { $as_echo "$as_me:${as_lineno-$LINENO}: Could not find $PROG_NAME!" >&5
-$as_echo "$as_me: Could not find $PROG_NAME!" >&6;}
-    as_fn_error $? "Cannot continue" "$LINENO" 5
-  fi
-
-
-
-  for ac_prog in tar
+    as_fn_error $? "Could not find required tool for TAIL" "$LINENO" 5
+  fi
+
+
+
+
+
+  # Publish this variable in the help.
+
+
+  if test "x$TAR" = x; then
+    # The variable is not set by user, try to locate tool using the code snippet
+    for ac_prog in tar
 do
   # Extract the first word of "$ac_prog", so it can be a program name with args.
 set dummy $ac_prog; ac_word=$2
@@ -5538,21 +9521,213 @@
   test -n "$TAR" && break
 done
 
+  else
+    # The variable is set, but is it from the command line or the environment?
+
+    # Try to remove the string !TAR! from our list.
+    try_remove_var=${CONFIGURE_OVERRIDDEN_VARIABLES//!TAR!/}
+    if test "x$try_remove_var" = "x$CONFIGURE_OVERRIDDEN_VARIABLES"; then
+      # If it failed, the variable was not from the command line. Ignore it,
+      # but warn the user (except for BASH, which is always set by the calling BASH).
+      if test "xTAR" != xBASH; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: Ignoring value of TAR from the environment. Use command line variables instead." >&5
+$as_echo "$as_me: WARNING: Ignoring value of TAR from the environment. Use command line variables instead." >&2;}
+      fi
+      # Try to locate tool using the code snippet
+      for ac_prog in tar
+do
+  # Extract the first word of "$ac_prog", so it can be a program name with args.
+set dummy $ac_prog; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_path_TAR+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $TAR in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_TAR="$TAR" # Let the user override the test with a path.
+  ;;
+  *)
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_path_TAR="$as_dir/$ac_word$ac_exec_ext"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+  ;;
+esac
+fi
+TAR=$ac_cv_path_TAR
+if test -n "$TAR"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $TAR" >&5
+$as_echo "$TAR" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+  test -n "$TAR" && break
+done
+
+    else
+      # If it succeeded, then it was overridden by the user. We will use it
+      # for the tool.
+
+      # First remove it from the list of overridden variables, so we can test
+      # for unknown variables in the end.
+      CONFIGURE_OVERRIDDEN_VARIABLES="$try_remove_var"
+
+      # Check if the provided tool contains a complete path.
+      tool_specified="$TAR"
+      tool_basename="${tool_specified##*/}"
+      if test "x$tool_basename" = "x$tool_specified"; then
+        # A command without a complete path is provided, search $PATH.
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool TAR=$tool_basename" >&5
+$as_echo "$as_me: Will search for user supplied tool TAR=$tool_basename" >&6;}
+        # Extract the first word of "$tool_basename", so it can be a program name with args.
+set dummy $tool_basename; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_path_TAR+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $TAR in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_TAR="$TAR" # Let the user override the test with a path.
+  ;;
+  *)
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_path_TAR="$as_dir/$ac_word$ac_exec_ext"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+  ;;
+esac
+fi
+TAR=$ac_cv_path_TAR
+if test -n "$TAR"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $TAR" >&5
+$as_echo "$TAR" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+        if test "x$TAR" = x; then
+          as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
+        fi
+      else
+        # Otherwise we believe it is a complete path. Use it as it is.
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool TAR=$tool_specified" >&5
+$as_echo "$as_me: Will use user supplied tool TAR=$tool_specified" >&6;}
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for TAR" >&5
+$as_echo_n "checking for TAR... " >&6; }
+        if test ! -x "$tool_specified"; then
+          { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
+$as_echo "not found" >&6; }
+          as_fn_error $? "User supplied tool TAR=$tool_specified does not exist or is not executable" "$LINENO" 5
+        fi
+        { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
+$as_echo "$tool_specified" >&6; }
+      fi
+    fi
+  fi
+
+
 
   if test "x$TAR" = x; then
-    if test "xtar" = x; then
-      PROG_NAME=tar
-    else
-      PROG_NAME=tar
-    fi
-    { $as_echo "$as_me:${as_lineno-$LINENO}: Could not find $PROG_NAME!" >&5
-$as_echo "$as_me: Could not find $PROG_NAME!" >&6;}
-    as_fn_error $? "Cannot continue" "$LINENO" 5
-  fi
-
-
-
-  for ac_prog in tee
+    as_fn_error $? "Could not find required tool for TAR" "$LINENO" 5
+  fi
+
+
+
+
+
+  # Publish this variable in the help.
+
+
+  if test "x$TEE" = x; then
+    # The variable is not set by user, try to locate tool using the code snippet
+    for ac_prog in tee
+do
+  # Extract the first word of "$ac_prog", so it can be a program name with args.
+set dummy $ac_prog; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_path_TEE+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $TEE in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_TEE="$TEE" # Let the user override the test with a path.
+  ;;
+  *)
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_path_TEE="$as_dir/$ac_word$ac_exec_ext"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+  ;;
+esac
+fi
+TEE=$ac_cv_path_TEE
+if test -n "$TEE"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $TEE" >&5
+$as_echo "$TEE" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+  test -n "$TEE" && break
+done
+
+  else
+    # The variable is set, but is it from the command line or the environment?
+
+    # Try to remove the string !TEE! from our list.
+    try_remove_var=${CONFIGURE_OVERRIDDEN_VARIABLES//!TEE!/}
+    if test "x$try_remove_var" = "x$CONFIGURE_OVERRIDDEN_VARIABLES"; then
+      # If it failed, the variable was not from the command line. Ignore it,
+      # but warn the user (except for BASH, which is always set by the calling BASH).
+      if test "xTEE" != xBASH; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: Ignoring value of TEE from the environment. Use command line variables instead." >&5
+$as_echo "$as_me: WARNING: Ignoring value of TEE from the environment. Use command line variables instead." >&2;}
+      fi
+      # Try to locate tool using the code snippet
+      for ac_prog in tee
 do
   # Extract the first word of "$ac_prog", so it can be a program name with args.
 set dummy $ac_prog; ac_word=$2
@@ -5597,21 +9772,155 @@
   test -n "$TEE" && break
 done
 
+    else
+      # If it succeeded, then it was overridden by the user. We will use it
+      # for the tool.
+
+      # First remove it from the list of overridden variables, so we can test
+      # for unknown variables in the end.
+      CONFIGURE_OVERRIDDEN_VARIABLES="$try_remove_var"
+
+      # Check if the provided tool contains a complete path.
+      tool_specified="$TEE"
+      tool_basename="${tool_specified##*/}"
+      if test "x$tool_basename" = "x$tool_specified"; then
+        # A command without a complete path is provided, search $PATH.
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool TEE=$tool_basename" >&5
+$as_echo "$as_me: Will search for user supplied tool TEE=$tool_basename" >&6;}
+        # Extract the first word of "$tool_basename", so it can be a program name with args.
+set dummy $tool_basename; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_path_TEE+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $TEE in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_TEE="$TEE" # Let the user override the test with a path.
+  ;;
+  *)
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_path_TEE="$as_dir/$ac_word$ac_exec_ext"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+  ;;
+esac
+fi
+TEE=$ac_cv_path_TEE
+if test -n "$TEE"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $TEE" >&5
+$as_echo "$TEE" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+        if test "x$TEE" = x; then
+          as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
+        fi
+      else
+        # Otherwise we believe it is a complete path. Use it as it is.
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool TEE=$tool_specified" >&5
+$as_echo "$as_me: Will use user supplied tool TEE=$tool_specified" >&6;}
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for TEE" >&5
+$as_echo_n "checking for TEE... " >&6; }
+        if test ! -x "$tool_specified"; then
+          { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
+$as_echo "not found" >&6; }
+          as_fn_error $? "User supplied tool TEE=$tool_specified does not exist or is not executable" "$LINENO" 5
+        fi
+        { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
+$as_echo "$tool_specified" >&6; }
+      fi
+    fi
+  fi
+
+
 
   if test "x$TEE" = x; then
-    if test "xtee" = x; then
-      PROG_NAME=tee
-    else
-      PROG_NAME=tee
-    fi
-    { $as_echo "$as_me:${as_lineno-$LINENO}: Could not find $PROG_NAME!" >&5
-$as_echo "$as_me: Could not find $PROG_NAME!" >&6;}
-    as_fn_error $? "Cannot continue" "$LINENO" 5
-  fi
-
-
-
-  for ac_prog in touch
+    as_fn_error $? "Could not find required tool for TEE" "$LINENO" 5
+  fi
+
+
+
+
+
+  # Publish this variable in the help.
+
+
+  if test "x$TOUCH" = x; then
+    # The variable is not set by user, try to locate tool using the code snippet
+    for ac_prog in touch
+do
+  # Extract the first word of "$ac_prog", so it can be a program name with args.
+set dummy $ac_prog; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_path_TOUCH+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $TOUCH in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_TOUCH="$TOUCH" # Let the user override the test with a path.
+  ;;
+  *)
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_path_TOUCH="$as_dir/$ac_word$ac_exec_ext"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+  ;;
+esac
+fi
+TOUCH=$ac_cv_path_TOUCH
+if test -n "$TOUCH"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $TOUCH" >&5
+$as_echo "$TOUCH" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+  test -n "$TOUCH" && break
+done
+
+  else
+    # The variable is set, but is it from the command line or the environment?
+
+    # Try to remove the string !TOUCH! from our list.
+    try_remove_var=${CONFIGURE_OVERRIDDEN_VARIABLES//!TOUCH!/}
+    if test "x$try_remove_var" = "x$CONFIGURE_OVERRIDDEN_VARIABLES"; then
+      # If it failed, the variable was not from the command line. Ignore it,
+      # but warn the user (except for BASH, which is always set by the calling BASH).
+      if test "xTOUCH" != xBASH; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: Ignoring value of TOUCH from the environment. Use command line variables instead." >&5
+$as_echo "$as_me: WARNING: Ignoring value of TOUCH from the environment. Use command line variables instead." >&2;}
+      fi
+      # Try to locate tool using the code snippet
+      for ac_prog in touch
 do
   # Extract the first word of "$ac_prog", so it can be a program name with args.
 set dummy $ac_prog; ac_word=$2
@@ -5656,21 +9965,97 @@
   test -n "$TOUCH" && break
 done
 
+    else
+      # If it succeeded, then it was overridden by the user. We will use it
+      # for the tool.
+
+      # First remove it from the list of overridden variables, so we can test
+      # for unknown variables in the end.
+      CONFIGURE_OVERRIDDEN_VARIABLES="$try_remove_var"
+
+      # Check if the provided tool contains a complete path.
+      tool_specified="$TOUCH"
+      tool_basename="${tool_specified##*/}"
+      if test "x$tool_basename" = "x$tool_specified"; then
+        # A command without a complete path is provided, search $PATH.
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool TOUCH=$tool_basename" >&5
+$as_echo "$as_me: Will search for user supplied tool TOUCH=$tool_basename" >&6;}
+        # Extract the first word of "$tool_basename", so it can be a program name with args.
+set dummy $tool_basename; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_path_TOUCH+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $TOUCH in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_TOUCH="$TOUCH" # Let the user override the test with a path.
+  ;;
+  *)
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_path_TOUCH="$as_dir/$ac_word$ac_exec_ext"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+  ;;
+esac
+fi
+TOUCH=$ac_cv_path_TOUCH
+if test -n "$TOUCH"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $TOUCH" >&5
+$as_echo "$TOUCH" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+        if test "x$TOUCH" = x; then
+          as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
+        fi
+      else
+        # Otherwise we believe it is a complete path. Use it as it is.
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool TOUCH=$tool_specified" >&5
+$as_echo "$as_me: Will use user supplied tool TOUCH=$tool_specified" >&6;}
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for TOUCH" >&5
+$as_echo_n "checking for TOUCH... " >&6; }
+        if test ! -x "$tool_specified"; then
+          { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
+$as_echo "not found" >&6; }
+          as_fn_error $? "User supplied tool TOUCH=$tool_specified does not exist or is not executable" "$LINENO" 5
+        fi
+        { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
+$as_echo "$tool_specified" >&6; }
+      fi
+    fi
+  fi
+
+
 
   if test "x$TOUCH" = x; then
-    if test "xtouch" = x; then
-      PROG_NAME=touch
-    else
-      PROG_NAME=touch
-    fi
-    { $as_echo "$as_me:${as_lineno-$LINENO}: Could not find $PROG_NAME!" >&5
-$as_echo "$as_me: Could not find $PROG_NAME!" >&6;}
-    as_fn_error $? "Cannot continue" "$LINENO" 5
-  fi
-
-
-
-  for ac_prog in tr
+    as_fn_error $? "Could not find required tool for TOUCH" "$LINENO" 5
+  fi
+
+
+
+
+
+  # Publish this variable in the help.
+
+
+  if test "x$TR" = x; then
+    # The variable is not set by user, try to locate tool using the code snippet
+    for ac_prog in tr
 do
   # Extract the first word of "$ac_prog", so it can be a program name with args.
 set dummy $ac_prog; ac_word=$2
@@ -5715,21 +10100,213 @@
   test -n "$TR" && break
 done
 
+  else
+    # The variable is set, but is it from the command line or the environment?
+
+    # Try to remove the string !TR! from our list.
+    try_remove_var=${CONFIGURE_OVERRIDDEN_VARIABLES//!TR!/}
+    if test "x$try_remove_var" = "x$CONFIGURE_OVERRIDDEN_VARIABLES"; then
+      # If it failed, the variable was not from the command line. Ignore it,
+      # but warn the user (except for BASH, which is always set by the calling BASH).
+      if test "xTR" != xBASH; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: Ignoring value of TR from the environment. Use command line variables instead." >&5
+$as_echo "$as_me: WARNING: Ignoring value of TR from the environment. Use command line variables instead." >&2;}
+      fi
+      # Try to locate tool using the code snippet
+      for ac_prog in tr
+do
+  # Extract the first word of "$ac_prog", so it can be a program name with args.
+set dummy $ac_prog; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_path_TR+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $TR in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_TR="$TR" # Let the user override the test with a path.
+  ;;
+  *)
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_path_TR="$as_dir/$ac_word$ac_exec_ext"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+  ;;
+esac
+fi
+TR=$ac_cv_path_TR
+if test -n "$TR"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $TR" >&5
+$as_echo "$TR" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+  test -n "$TR" && break
+done
+
+    else
+      # If it succeeded, then it was overridden by the user. We will use it
+      # for the tool.
+
+      # First remove it from the list of overridden variables, so we can test
+      # for unknown variables in the end.
+      CONFIGURE_OVERRIDDEN_VARIABLES="$try_remove_var"
+
+      # Check if the provided tool contains a complete path.
+      tool_specified="$TR"
+      tool_basename="${tool_specified##*/}"
+      if test "x$tool_basename" = "x$tool_specified"; then
+        # A command without a complete path is provided, search $PATH.
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool TR=$tool_basename" >&5
+$as_echo "$as_me: Will search for user supplied tool TR=$tool_basename" >&6;}
+        # Extract the first word of "$tool_basename", so it can be a program name with args.
+set dummy $tool_basename; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_path_TR+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $TR in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_TR="$TR" # Let the user override the test with a path.
+  ;;
+  *)
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_path_TR="$as_dir/$ac_word$ac_exec_ext"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+  ;;
+esac
+fi
+TR=$ac_cv_path_TR
+if test -n "$TR"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $TR" >&5
+$as_echo "$TR" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+        if test "x$TR" = x; then
+          as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
+        fi
+      else
+        # Otherwise we believe it is a complete path. Use it as it is.
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool TR=$tool_specified" >&5
+$as_echo "$as_me: Will use user supplied tool TR=$tool_specified" >&6;}
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for TR" >&5
+$as_echo_n "checking for TR... " >&6; }
+        if test ! -x "$tool_specified"; then
+          { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
+$as_echo "not found" >&6; }
+          as_fn_error $? "User supplied tool TR=$tool_specified does not exist or is not executable" "$LINENO" 5
+        fi
+        { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
+$as_echo "$tool_specified" >&6; }
+      fi
+    fi
+  fi
+
+
 
   if test "x$TR" = x; then
-    if test "xtr" = x; then
-      PROG_NAME=tr
-    else
-      PROG_NAME=tr
-    fi
-    { $as_echo "$as_me:${as_lineno-$LINENO}: Could not find $PROG_NAME!" >&5
-$as_echo "$as_me: Could not find $PROG_NAME!" >&6;}
-    as_fn_error $? "Cannot continue" "$LINENO" 5
-  fi
-
-
-
-  for ac_prog in uname
+    as_fn_error $? "Could not find required tool for TR" "$LINENO" 5
+  fi
+
+
+
+
+
+  # Publish this variable in the help.
+
+
+  if test "x$UNAME" = x; then
+    # The variable is not set by user, try to locate tool using the code snippet
+    for ac_prog in uname
+do
+  # Extract the first word of "$ac_prog", so it can be a program name with args.
+set dummy $ac_prog; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_path_UNAME+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $UNAME in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_UNAME="$UNAME" # Let the user override the test with a path.
+  ;;
+  *)
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_path_UNAME="$as_dir/$ac_word$ac_exec_ext"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+  ;;
+esac
+fi
+UNAME=$ac_cv_path_UNAME
+if test -n "$UNAME"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $UNAME" >&5
+$as_echo "$UNAME" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+  test -n "$UNAME" && break
+done
+
+  else
+    # The variable is set, but is it from the command line or the environment?
+
+    # Try to remove the string !UNAME! from our list.
+    try_remove_var=${CONFIGURE_OVERRIDDEN_VARIABLES//!UNAME!/}
+    if test "x$try_remove_var" = "x$CONFIGURE_OVERRIDDEN_VARIABLES"; then
+      # If it failed, the variable was not from the command line. Ignore it,
+      # but warn the user (except for BASH, which is always set by the calling BASH).
+      if test "xUNAME" != xBASH; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: Ignoring value of UNAME from the environment. Use command line variables instead." >&5
+$as_echo "$as_me: WARNING: Ignoring value of UNAME from the environment. Use command line variables instead." >&2;}
+      fi
+      # Try to locate tool using the code snippet
+      for ac_prog in uname
 do
   # Extract the first word of "$ac_prog", so it can be a program name with args.
 set dummy $ac_prog; ac_word=$2
@@ -5774,21 +10351,97 @@
   test -n "$UNAME" && break
 done
 
+    else
+      # If it succeeded, then it was overridden by the user. We will use it
+      # for the tool.
+
+      # First remove it from the list of overridden variables, so we can test
+      # for unknown variables in the end.
+      CONFIGURE_OVERRIDDEN_VARIABLES="$try_remove_var"
+
+      # Check if the provided tool contains a complete path.
+      tool_specified="$UNAME"
+      tool_basename="${tool_specified##*/}"
+      if test "x$tool_basename" = "x$tool_specified"; then
+        # A command without a complete path is provided, search $PATH.
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool UNAME=$tool_basename" >&5
+$as_echo "$as_me: Will search for user supplied tool UNAME=$tool_basename" >&6;}
+        # Extract the first word of "$tool_basename", so it can be a program name with args.
+set dummy $tool_basename; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_path_UNAME+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $UNAME in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_UNAME="$UNAME" # Let the user override the test with a path.
+  ;;
+  *)
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_path_UNAME="$as_dir/$ac_word$ac_exec_ext"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+  ;;
+esac
+fi
+UNAME=$ac_cv_path_UNAME
+if test -n "$UNAME"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $UNAME" >&5
+$as_echo "$UNAME" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+        if test "x$UNAME" = x; then
+          as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
+        fi
+      else
+        # Otherwise we believe it is a complete path. Use it as it is.
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool UNAME=$tool_specified" >&5
+$as_echo "$as_me: Will use user supplied tool UNAME=$tool_specified" >&6;}
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for UNAME" >&5
+$as_echo_n "checking for UNAME... " >&6; }
+        if test ! -x "$tool_specified"; then
+          { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
+$as_echo "not found" >&6; }
+          as_fn_error $? "User supplied tool UNAME=$tool_specified does not exist or is not executable" "$LINENO" 5
+        fi
+        { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
+$as_echo "$tool_specified" >&6; }
+      fi
+    fi
+  fi
+
+
 
   if test "x$UNAME" = x; then
-    if test "xuname" = x; then
-      PROG_NAME=uname
-    else
-      PROG_NAME=uname
-    fi
-    { $as_echo "$as_me:${as_lineno-$LINENO}: Could not find $PROG_NAME!" >&5
-$as_echo "$as_me: Could not find $PROG_NAME!" >&6;}
-    as_fn_error $? "Cannot continue" "$LINENO" 5
-  fi
-
-
-
-  for ac_prog in uniq
+    as_fn_error $? "Could not find required tool for UNAME" "$LINENO" 5
+  fi
+
+
+
+
+
+  # Publish this variable in the help.
+
+
+  if test "x$UNIQ" = x; then
+    # The variable is not set by user, try to locate tool using the code snippet
+    for ac_prog in uniq
 do
   # Extract the first word of "$ac_prog", so it can be a program name with args.
 set dummy $ac_prog; ac_word=$2
@@ -5833,21 +10486,213 @@
   test -n "$UNIQ" && break
 done
 
+  else
+    # The variable is set, but is it from the command line or the environment?
+
+    # Try to remove the string !UNIQ! from our list.
+    try_remove_var=${CONFIGURE_OVERRIDDEN_VARIABLES//!UNIQ!/}
+    if test "x$try_remove_var" = "x$CONFIGURE_OVERRIDDEN_VARIABLES"; then
+      # If it failed, the variable was not from the command line. Ignore it,
+      # but warn the user (except for BASH, which is always set by the calling BASH).
+      if test "xUNIQ" != xBASH; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: Ignoring value of UNIQ from the environment. Use command line variables instead." >&5
+$as_echo "$as_me: WARNING: Ignoring value of UNIQ from the environment. Use command line variables instead." >&2;}
+      fi
+      # Try to locate tool using the code snippet
+      for ac_prog in uniq
+do
+  # Extract the first word of "$ac_prog", so it can be a program name with args.
+set dummy $ac_prog; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_path_UNIQ+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $UNIQ in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_UNIQ="$UNIQ" # Let the user override the test with a path.
+  ;;
+  *)
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_path_UNIQ="$as_dir/$ac_word$ac_exec_ext"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+  ;;
+esac
+fi
+UNIQ=$ac_cv_path_UNIQ
+if test -n "$UNIQ"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $UNIQ" >&5
+$as_echo "$UNIQ" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+  test -n "$UNIQ" && break
+done
+
+    else
+      # If it succeeded, then it was overridden by the user. We will use it
+      # for the tool.
+
+      # First remove it from the list of overridden variables, so we can test
+      # for unknown variables in the end.
+      CONFIGURE_OVERRIDDEN_VARIABLES="$try_remove_var"
+
+      # Check if the provided tool contains a complete path.
+      tool_specified="$UNIQ"
+      tool_basename="${tool_specified##*/}"
+      if test "x$tool_basename" = "x$tool_specified"; then
+        # A command without a complete path is provided, search $PATH.
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool UNIQ=$tool_basename" >&5
+$as_echo "$as_me: Will search for user supplied tool UNIQ=$tool_basename" >&6;}
+        # Extract the first word of "$tool_basename", so it can be a program name with args.
+set dummy $tool_basename; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_path_UNIQ+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $UNIQ in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_UNIQ="$UNIQ" # Let the user override the test with a path.
+  ;;
+  *)
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_path_UNIQ="$as_dir/$ac_word$ac_exec_ext"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+  ;;
+esac
+fi
+UNIQ=$ac_cv_path_UNIQ
+if test -n "$UNIQ"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $UNIQ" >&5
+$as_echo "$UNIQ" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+        if test "x$UNIQ" = x; then
+          as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
+        fi
+      else
+        # Otherwise we believe it is a complete path. Use it as it is.
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool UNIQ=$tool_specified" >&5
+$as_echo "$as_me: Will use user supplied tool UNIQ=$tool_specified" >&6;}
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for UNIQ" >&5
+$as_echo_n "checking for UNIQ... " >&6; }
+        if test ! -x "$tool_specified"; then
+          { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
+$as_echo "not found" >&6; }
+          as_fn_error $? "User supplied tool UNIQ=$tool_specified does not exist or is not executable" "$LINENO" 5
+        fi
+        { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
+$as_echo "$tool_specified" >&6; }
+      fi
+    fi
+  fi
+
+
 
   if test "x$UNIQ" = x; then
-    if test "xuniq" = x; then
-      PROG_NAME=uniq
-    else
-      PROG_NAME=uniq
-    fi
-    { $as_echo "$as_me:${as_lineno-$LINENO}: Could not find $PROG_NAME!" >&5
-$as_echo "$as_me: Could not find $PROG_NAME!" >&6;}
-    as_fn_error $? "Cannot continue" "$LINENO" 5
-  fi
-
-
-
-  for ac_prog in wc
+    as_fn_error $? "Could not find required tool for UNIQ" "$LINENO" 5
+  fi
+
+
+
+
+
+  # Publish this variable in the help.
+
+
+  if test "x$WC" = x; then
+    # The variable is not set by user, try to locate tool using the code snippet
+    for ac_prog in wc
+do
+  # Extract the first word of "$ac_prog", so it can be a program name with args.
+set dummy $ac_prog; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_path_WC+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $WC in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_WC="$WC" # Let the user override the test with a path.
+  ;;
+  *)
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_path_WC="$as_dir/$ac_word$ac_exec_ext"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+  ;;
+esac
+fi
+WC=$ac_cv_path_WC
+if test -n "$WC"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $WC" >&5
+$as_echo "$WC" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+  test -n "$WC" && break
+done
+
+  else
+    # The variable is set, but is it from the command line or the environment?
+
+    # Try to remove the string !WC! from our list.
+    try_remove_var=${CONFIGURE_OVERRIDDEN_VARIABLES//!WC!/}
+    if test "x$try_remove_var" = "x$CONFIGURE_OVERRIDDEN_VARIABLES"; then
+      # If it failed, the variable was not from the command line. Ignore it,
+      # but warn the user (except for BASH, which is always set by the calling BASH).
+      if test "xWC" != xBASH; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: Ignoring value of WC from the environment. Use command line variables instead." >&5
+$as_echo "$as_me: WARNING: Ignoring value of WC from the environment. Use command line variables instead." >&2;}
+      fi
+      # Try to locate tool using the code snippet
+      for ac_prog in wc
 do
   # Extract the first word of "$ac_prog", so it can be a program name with args.
 set dummy $ac_prog; ac_word=$2
@@ -5892,21 +10737,155 @@
   test -n "$WC" && break
 done
 
+    else
+      # If it succeeded, then it was overridden by the user. We will use it
+      # for the tool.
+
+      # First remove it from the list of overridden variables, so we can test
+      # for unknown variables in the end.
+      CONFIGURE_OVERRIDDEN_VARIABLES="$try_remove_var"
+
+      # Check if the provided tool contains a complete path.
+      tool_specified="$WC"
+      tool_basename="${tool_specified##*/}"
+      if test "x$tool_basename" = "x$tool_specified"; then
+        # A command without a complete path is provided, search $PATH.
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool WC=$tool_basename" >&5
+$as_echo "$as_me: Will search for user supplied tool WC=$tool_basename" >&6;}
+        # Extract the first word of "$tool_basename", so it can be a program name with args.
+set dummy $tool_basename; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_path_WC+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $WC in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_WC="$WC" # Let the user override the test with a path.
+  ;;
+  *)
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_path_WC="$as_dir/$ac_word$ac_exec_ext"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+  ;;
+esac
+fi
+WC=$ac_cv_path_WC
+if test -n "$WC"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $WC" >&5
+$as_echo "$WC" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+        if test "x$WC" = x; then
+          as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
+        fi
+      else
+        # Otherwise we believe it is a complete path. Use it as it is.
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool WC=$tool_specified" >&5
+$as_echo "$as_me: Will use user supplied tool WC=$tool_specified" >&6;}
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for WC" >&5
+$as_echo_n "checking for WC... " >&6; }
+        if test ! -x "$tool_specified"; then
+          { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
+$as_echo "not found" >&6; }
+          as_fn_error $? "User supplied tool WC=$tool_specified does not exist or is not executable" "$LINENO" 5
+        fi
+        { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
+$as_echo "$tool_specified" >&6; }
+      fi
+    fi
+  fi
+
+
 
   if test "x$WC" = x; then
-    if test "xwc" = x; then
-      PROG_NAME=wc
-    else
-      PROG_NAME=wc
-    fi
-    { $as_echo "$as_me:${as_lineno-$LINENO}: Could not find $PROG_NAME!" >&5
-$as_echo "$as_me: Could not find $PROG_NAME!" >&6;}
-    as_fn_error $? "Cannot continue" "$LINENO" 5
-  fi
-
-
-
-  for ac_prog in which
+    as_fn_error $? "Could not find required tool for WC" "$LINENO" 5
+  fi
+
+
+
+
+
+  # Publish this variable in the help.
+
+
+  if test "x$WHICH" = x; then
+    # The variable is not set by user, try to locate tool using the code snippet
+    for ac_prog in which
+do
+  # Extract the first word of "$ac_prog", so it can be a program name with args.
+set dummy $ac_prog; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_path_WHICH+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $WHICH in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_WHICH="$WHICH" # Let the user override the test with a path.
+  ;;
+  *)
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_path_WHICH="$as_dir/$ac_word$ac_exec_ext"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+  ;;
+esac
+fi
+WHICH=$ac_cv_path_WHICH
+if test -n "$WHICH"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $WHICH" >&5
+$as_echo "$WHICH" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+  test -n "$WHICH" && break
+done
+
+  else
+    # The variable is set, but is it from the command line or the environment?
+
+    # Try to remove the string !WHICH! from our list.
+    try_remove_var=${CONFIGURE_OVERRIDDEN_VARIABLES//!WHICH!/}
+    if test "x$try_remove_var" = "x$CONFIGURE_OVERRIDDEN_VARIABLES"; then
+      # If it failed, the variable was not from the command line. Ignore it,
+      # but warn the user (except for BASH, which is always set by the calling BASH).
+      if test "xWHICH" != xBASH; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: Ignoring value of WHICH from the environment. Use command line variables instead." >&5
+$as_echo "$as_me: WARNING: Ignoring value of WHICH from the environment. Use command line variables instead." >&2;}
+      fi
+      # Try to locate tool using the code snippet
+      for ac_prog in which
 do
   # Extract the first word of "$ac_prog", so it can be a program name with args.
 set dummy $ac_prog; ac_word=$2
@@ -5951,21 +10930,155 @@
   test -n "$WHICH" && break
 done
 
+    else
+      # If it succeeded, then it was overridden by the user. We will use it
+      # for the tool.
+
+      # First remove it from the list of overridden variables, so we can test
+      # for unknown variables in the end.
+      CONFIGURE_OVERRIDDEN_VARIABLES="$try_remove_var"
+
+      # Check if the provided tool contains a complete path.
+      tool_specified="$WHICH"
+      tool_basename="${tool_specified##*/}"
+      if test "x$tool_basename" = "x$tool_specified"; then
+        # A command without a complete path is provided, search $PATH.
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool WHICH=$tool_basename" >&5
+$as_echo "$as_me: Will search for user supplied tool WHICH=$tool_basename" >&6;}
+        # Extract the first word of "$tool_basename", so it can be a program name with args.
+set dummy $tool_basename; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_path_WHICH+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $WHICH in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_WHICH="$WHICH" # Let the user override the test with a path.
+  ;;
+  *)
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_path_WHICH="$as_dir/$ac_word$ac_exec_ext"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+  ;;
+esac
+fi
+WHICH=$ac_cv_path_WHICH
+if test -n "$WHICH"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $WHICH" >&5
+$as_echo "$WHICH" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+        if test "x$WHICH" = x; then
+          as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
+        fi
+      else
+        # Otherwise we believe it is a complete path. Use it as it is.
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool WHICH=$tool_specified" >&5
+$as_echo "$as_me: Will use user supplied tool WHICH=$tool_specified" >&6;}
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for WHICH" >&5
+$as_echo_n "checking for WHICH... " >&6; }
+        if test ! -x "$tool_specified"; then
+          { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
+$as_echo "not found" >&6; }
+          as_fn_error $? "User supplied tool WHICH=$tool_specified does not exist or is not executable" "$LINENO" 5
+        fi
+        { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
+$as_echo "$tool_specified" >&6; }
+      fi
+    fi
+  fi
+
+
 
   if test "x$WHICH" = x; then
-    if test "xwhich" = x; then
-      PROG_NAME=which
-    else
-      PROG_NAME=which
-    fi
-    { $as_echo "$as_me:${as_lineno-$LINENO}: Could not find $PROG_NAME!" >&5
-$as_echo "$as_me: Could not find $PROG_NAME!" >&6;}
-    as_fn_error $? "Cannot continue" "$LINENO" 5
-  fi
-
-
-
-  for ac_prog in xargs
+    as_fn_error $? "Could not find required tool for WHICH" "$LINENO" 5
+  fi
+
+
+
+
+
+  # Publish this variable in the help.
+
+
+  if test "x$XARGS" = x; then
+    # The variable is not set by user, try to locate tool using the code snippet
+    for ac_prog in xargs
+do
+  # Extract the first word of "$ac_prog", so it can be a program name with args.
+set dummy $ac_prog; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_path_XARGS+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $XARGS in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_XARGS="$XARGS" # Let the user override the test with a path.
+  ;;
+  *)
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_path_XARGS="$as_dir/$ac_word$ac_exec_ext"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+  ;;
+esac
+fi
+XARGS=$ac_cv_path_XARGS
+if test -n "$XARGS"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $XARGS" >&5
+$as_echo "$XARGS" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+  test -n "$XARGS" && break
+done
+
+  else
+    # The variable is set, but is it from the command line or the environment?
+
+    # Try to remove the string !XARGS! from our list.
+    try_remove_var=${CONFIGURE_OVERRIDDEN_VARIABLES//!XARGS!/}
+    if test "x$try_remove_var" = "x$CONFIGURE_OVERRIDDEN_VARIABLES"; then
+      # If it failed, the variable was not from the command line. Ignore it,
+      # but warn the user (except for BASH, which is always set by the calling BASH).
+      if test "xXARGS" != xBASH; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: Ignoring value of XARGS from the environment. Use command line variables instead." >&5
+$as_echo "$as_me: WARNING: Ignoring value of XARGS from the environment. Use command line variables instead." >&2;}
+      fi
+      # Try to locate tool using the code snippet
+      for ac_prog in xargs
 do
   # Extract the first word of "$ac_prog", so it can be a program name with args.
 set dummy $ac_prog; ac_word=$2
@@ -6010,22 +11123,98 @@
   test -n "$XARGS" && break
 done
 
+    else
+      # If it succeeded, then it was overridden by the user. We will use it
+      # for the tool.
+
+      # First remove it from the list of overridden variables, so we can test
+      # for unknown variables in the end.
+      CONFIGURE_OVERRIDDEN_VARIABLES="$try_remove_var"
+
+      # Check if the provided tool contains a complete path.
+      tool_specified="$XARGS"
+      tool_basename="${tool_specified##*/}"
+      if test "x$tool_basename" = "x$tool_specified"; then
+        # A command without a complete path is provided, search $PATH.
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool XARGS=$tool_basename" >&5
+$as_echo "$as_me: Will search for user supplied tool XARGS=$tool_basename" >&6;}
+        # Extract the first word of "$tool_basename", so it can be a program name with args.
+set dummy $tool_basename; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_path_XARGS+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $XARGS in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_XARGS="$XARGS" # Let the user override the test with a path.
+  ;;
+  *)
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_path_XARGS="$as_dir/$ac_word$ac_exec_ext"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+  ;;
+esac
+fi
+XARGS=$ac_cv_path_XARGS
+if test -n "$XARGS"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $XARGS" >&5
+$as_echo "$XARGS" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+        if test "x$XARGS" = x; then
+          as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
+        fi
+      else
+        # Otherwise we believe it is a complete path. Use it as it is.
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool XARGS=$tool_specified" >&5
+$as_echo "$as_me: Will use user supplied tool XARGS=$tool_specified" >&6;}
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for XARGS" >&5
+$as_echo_n "checking for XARGS... " >&6; }
+        if test ! -x "$tool_specified"; then
+          { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
+$as_echo "not found" >&6; }
+          as_fn_error $? "User supplied tool XARGS=$tool_specified does not exist or is not executable" "$LINENO" 5
+        fi
+        { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
+$as_echo "$tool_specified" >&6; }
+      fi
+    fi
+  fi
+
+
 
   if test "x$XARGS" = x; then
-    if test "xxargs" = x; then
-      PROG_NAME=xargs
-    else
-      PROG_NAME=xargs
-    fi
-    { $as_echo "$as_me:${as_lineno-$LINENO}: Could not find $PROG_NAME!" >&5
-$as_echo "$as_me: Could not find $PROG_NAME!" >&6;}
-    as_fn_error $? "Cannot continue" "$LINENO" 5
+    as_fn_error $? "Could not find required tool for XARGS" "$LINENO" 5
   fi
 
 
 
   # Then required tools that require some special treatment.
-  for ac_prog in gawk mawk nawk awk
+
+
+  # Publish this variable in the help.
+
+
+  if test "x$AWK" = x; then
+    # The variable is not set by user, try to locate tool using the code snippet
+    for ac_prog in gawk mawk nawk awk
 do
   # Extract the first word of "$ac_prog", so it can be a program name with args.
 set dummy $ac_prog; ac_word=$2
@@ -6067,19 +11256,150 @@
   test -n "$AWK" && break
 done
 
+  else
+    # The variable is set, but is it from the command line or the environment?
+
+    # Try to remove the string !AWK! from our list.
+    try_remove_var=${CONFIGURE_OVERRIDDEN_VARIABLES//!AWK!/}
+    if test "x$try_remove_var" = "x$CONFIGURE_OVERRIDDEN_VARIABLES"; then
+      # If it failed, the variable was not from the command line. Ignore it,
+      # but warn the user (except for BASH, which is always set by the calling BASH).
+      if test "xAWK" != xBASH; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: Ignoring value of AWK from the environment. Use command line variables instead." >&5
+$as_echo "$as_me: WARNING: Ignoring value of AWK from the environment. Use command line variables instead." >&2;}
+      fi
+      # Try to locate tool using the code snippet
+      for ac_prog in gawk mawk nawk awk
+do
+  # Extract the first word of "$ac_prog", so it can be a program name with args.
+set dummy $ac_prog; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_prog_AWK+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  if test -n "$AWK"; then
+  ac_cv_prog_AWK="$AWK" # Let the user override the test.
+else
+as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_prog_AWK="$ac_prog"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+fi
+fi
+AWK=$ac_cv_prog_AWK
+if test -n "$AWK"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $AWK" >&5
+$as_echo "$AWK" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+  test -n "$AWK" && break
+done
+
+    else
+      # If it succeeded, then it was overridden by the user. We will use it
+      # for the tool.
+
+      # First remove it from the list of overridden variables, so we can test
+      # for unknown variables in the end.
+      CONFIGURE_OVERRIDDEN_VARIABLES="$try_remove_var"
+
+      # Check if the provided tool contains a complete path.
+      tool_specified="$AWK"
+      tool_basename="${tool_specified##*/}"
+      if test "x$tool_basename" = "x$tool_specified"; then
+        # A command without a complete path is provided, search $PATH.
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool AWK=$tool_basename" >&5
+$as_echo "$as_me: Will search for user supplied tool AWK=$tool_basename" >&6;}
+        # Extract the first word of "$tool_basename", so it can be a program name with args.
+set dummy $tool_basename; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_path_AWK+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $AWK in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_AWK="$AWK" # Let the user override the test with a path.
+  ;;
+  *)
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_path_AWK="$as_dir/$ac_word$ac_exec_ext"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+  ;;
+esac
+fi
+AWK=$ac_cv_path_AWK
+if test -n "$AWK"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $AWK" >&5
+$as_echo "$AWK" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+        if test "x$AWK" = x; then
+          as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
+        fi
+      else
+        # Otherwise we believe it is a complete path. Use it as it is.
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool AWK=$tool_specified" >&5
+$as_echo "$as_me: Will use user supplied tool AWK=$tool_specified" >&6;}
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for AWK" >&5
+$as_echo_n "checking for AWK... " >&6; }
+        if test ! -x "$tool_specified"; then
+          { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
+$as_echo "not found" >&6; }
+          as_fn_error $? "User supplied tool AWK=$tool_specified does not exist or is not executable" "$LINENO" 5
+        fi
+        { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
+$as_echo "$tool_specified" >&6; }
+      fi
+    fi
+  fi
+
 
   if test "x$AWK" = x; then
-    if test "x" = x; then
-      PROG_NAME=awk
-    else
-      PROG_NAME=
-    fi
-    { $as_echo "$as_me:${as_lineno-$LINENO}: Could not find $PROG_NAME!" >&5
-$as_echo "$as_me: Could not find $PROG_NAME!" >&6;}
-    as_fn_error $? "Cannot continue" "$LINENO" 5
-  fi
-
-  { $as_echo "$as_me:${as_lineno-$LINENO}: checking for grep that handles long lines and -e" >&5
+    as_fn_error $? "Could not find required tool for AWK" "$LINENO" 5
+  fi
+
+
+
+
+  # Publish this variable in the help.
+
+
+  if test "x$GREP" = x; then
+    # The variable is not set by user, try to locate tool using the code snippet
+    { $as_echo "$as_me:${as_lineno-$LINENO}: checking for grep that handles long lines and -e" >&5
 $as_echo_n "checking for grep that handles long lines and -e... " >&6; }
 if ${ac_cv_path_GREP+:} false; then :
   $as_echo_n "(cached) " >&6
@@ -6142,19 +11462,171 @@
  GREP="$ac_cv_path_GREP"
 
 
+  else
+    # The variable is set, but is it from the command line or the environment?
+
+    # Try to remove the string !GREP! from our list.
+    try_remove_var=${CONFIGURE_OVERRIDDEN_VARIABLES//!GREP!/}
+    if test "x$try_remove_var" = "x$CONFIGURE_OVERRIDDEN_VARIABLES"; then
+      # If it failed, the variable was not from the command line. Ignore it,
+      # but warn the user (except for BASH, which is always set by the calling BASH).
+      if test "xGREP" != xBASH; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: Ignoring value of GREP from the environment. Use command line variables instead." >&5
+$as_echo "$as_me: WARNING: Ignoring value of GREP from the environment. Use command line variables instead." >&2;}
+      fi
+      # Try to locate tool using the code snippet
+      { $as_echo "$as_me:${as_lineno-$LINENO}: checking for grep that handles long lines and -e" >&5
+$as_echo_n "checking for grep that handles long lines and -e... " >&6; }
+if ${ac_cv_path_GREP+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  if test -z "$GREP"; then
+  ac_path_GREP_found=false
+  # Loop through the user's path and test for each of PROGNAME-LIST
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH$PATH_SEPARATOR/usr/xpg4/bin
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_prog in grep ggrep; do
+    for ac_exec_ext in '' $ac_executable_extensions; do
+      ac_path_GREP="$as_dir/$ac_prog$ac_exec_ext"
+      as_fn_executable_p "$ac_path_GREP" || continue
+# Check for GNU ac_path_GREP and select it if it is found.
+  # Check for GNU $ac_path_GREP
+case `"$ac_path_GREP" --version 2>&1` in
+*GNU*)
+  ac_cv_path_GREP="$ac_path_GREP" ac_path_GREP_found=:;;
+*)
+  ac_count=0
+  $as_echo_n 0123456789 >"conftest.in"
+  while :
+  do
+    cat "conftest.in" "conftest.in" >"conftest.tmp"
+    mv "conftest.tmp" "conftest.in"
+    cp "conftest.in" "conftest.nl"
+    $as_echo 'GREP' >> "conftest.nl"
+    "$ac_path_GREP" -e 'GREP$' -e '-(cannot match)-' < "conftest.nl" >"conftest.out" 2>/dev/null || break
+    diff "conftest.out" "conftest.nl" >/dev/null 2>&1 || break
+    as_fn_arith $ac_count + 1 && ac_count=$as_val
+    if test $ac_count -gt ${ac_path_GREP_max-0}; then
+      # Best one so far, save it but keep looking for a better one
+      ac_cv_path_GREP="$ac_path_GREP"
+      ac_path_GREP_max=$ac_count
+    fi
+    # 10*(2^10) chars as input seems more than enough
+    test $ac_count -gt 10 && break
+  done
+  rm -f conftest.in conftest.tmp conftest.nl conftest.out;;
+esac
+
+      $ac_path_GREP_found && break 3
+    done
+  done
+  done
+IFS=$as_save_IFS
+  if test -z "$ac_cv_path_GREP"; then
+    as_fn_error $? "no acceptable grep could be found in $PATH$PATH_SEPARATOR/usr/xpg4/bin" "$LINENO" 5
+  fi
+else
+  ac_cv_path_GREP=$GREP
+fi
+
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_path_GREP" >&5
+$as_echo "$ac_cv_path_GREP" >&6; }
+ GREP="$ac_cv_path_GREP"
+
+
+    else
+      # If it succeeded, then it was overridden by the user. We will use it
+      # for the tool.
+
+      # First remove it from the list of overridden variables, so we can test
+      # for unknown variables in the end.
+      CONFIGURE_OVERRIDDEN_VARIABLES="$try_remove_var"
+
+      # Check if the provided tool contains a complete path.
+      tool_specified="$GREP"
+      tool_basename="${tool_specified##*/}"
+      if test "x$tool_basename" = "x$tool_specified"; then
+        # A command without a complete path is provided, search $PATH.
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool GREP=$tool_basename" >&5
+$as_echo "$as_me: Will search for user supplied tool GREP=$tool_basename" >&6;}
+        # Extract the first word of "$tool_basename", so it can be a program name with args.
+set dummy $tool_basename; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_path_GREP+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $GREP in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_GREP="$GREP" # Let the user override the test with a path.
+  ;;
+  *)
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_path_GREP="$as_dir/$ac_word$ac_exec_ext"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+  ;;
+esac
+fi
+GREP=$ac_cv_path_GREP
+if test -n "$GREP"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $GREP" >&5
+$as_echo "$GREP" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+        if test "x$GREP" = x; then
+          as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
+        fi
+      else
+        # Otherwise we believe it is a complete path. Use it as it is.
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool GREP=$tool_specified" >&5
+$as_echo "$as_me: Will use user supplied tool GREP=$tool_specified" >&6;}
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for GREP" >&5
+$as_echo_n "checking for GREP... " >&6; }
+        if test ! -x "$tool_specified"; then
+          { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
+$as_echo "not found" >&6; }
+          as_fn_error $? "User supplied tool GREP=$tool_specified does not exist or is not executable" "$LINENO" 5
+        fi
+        { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
+$as_echo "$tool_specified" >&6; }
+      fi
+    fi
+  fi
+
 
   if test "x$GREP" = x; then
-    if test "x" = x; then
-      PROG_NAME=grep
-    else
-      PROG_NAME=
-    fi
-    { $as_echo "$as_me:${as_lineno-$LINENO}: Could not find $PROG_NAME!" >&5
-$as_echo "$as_me: Could not find $PROG_NAME!" >&6;}
-    as_fn_error $? "Cannot continue" "$LINENO" 5
-  fi
-
-  { $as_echo "$as_me:${as_lineno-$LINENO}: checking for egrep" >&5
+    as_fn_error $? "Could not find required tool for GREP" "$LINENO" 5
+  fi
+
+
+
+
+  # Publish this variable in the help.
+
+
+  if test "x$EGREP" = x; then
+    # The variable is not set by user, try to locate tool using the code snippet
+    { $as_echo "$as_me:${as_lineno-$LINENO}: checking for egrep" >&5
 $as_echo_n "checking for egrep... " >&6; }
 if ${ac_cv_path_EGREP+:} false; then :
   $as_echo_n "(cached) " >&6
@@ -6221,19 +11693,175 @@
  EGREP="$ac_cv_path_EGREP"
 
 
+  else
+    # The variable is set, but is it from the command line or the environment?
+
+    # Try to remove the string !EGREP! from our list.
+    try_remove_var=${CONFIGURE_OVERRIDDEN_VARIABLES//!EGREP!/}
+    if test "x$try_remove_var" = "x$CONFIGURE_OVERRIDDEN_VARIABLES"; then
+      # If it failed, the variable was not from the command line. Ignore it,
+      # but warn the user (except for BASH, which is always set by the calling BASH).
+      if test "xEGREP" != xBASH; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: Ignoring value of EGREP from the environment. Use command line variables instead." >&5
+$as_echo "$as_me: WARNING: Ignoring value of EGREP from the environment. Use command line variables instead." >&2;}
+      fi
+      # Try to locate tool using the code snippet
+      { $as_echo "$as_me:${as_lineno-$LINENO}: checking for egrep" >&5
+$as_echo_n "checking for egrep... " >&6; }
+if ${ac_cv_path_EGREP+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  if echo a | $GREP -E '(a|b)' >/dev/null 2>&1
+   then ac_cv_path_EGREP="$GREP -E"
+   else
+     if test -z "$EGREP"; then
+  ac_path_EGREP_found=false
+  # Loop through the user's path and test for each of PROGNAME-LIST
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH$PATH_SEPARATOR/usr/xpg4/bin
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_prog in egrep; do
+    for ac_exec_ext in '' $ac_executable_extensions; do
+      ac_path_EGREP="$as_dir/$ac_prog$ac_exec_ext"
+      as_fn_executable_p "$ac_path_EGREP" || continue
+# Check for GNU ac_path_EGREP and select it if it is found.
+  # Check for GNU $ac_path_EGREP
+case `"$ac_path_EGREP" --version 2>&1` in
+*GNU*)
+  ac_cv_path_EGREP="$ac_path_EGREP" ac_path_EGREP_found=:;;
+*)
+  ac_count=0
+  $as_echo_n 0123456789 >"conftest.in"
+  while :
+  do
+    cat "conftest.in" "conftest.in" >"conftest.tmp"
+    mv "conftest.tmp" "conftest.in"
+    cp "conftest.in" "conftest.nl"
+    $as_echo 'EGREP' >> "conftest.nl"
+    "$ac_path_EGREP" 'EGREP$' < "conftest.nl" >"conftest.out" 2>/dev/null || break
+    diff "conftest.out" "conftest.nl" >/dev/null 2>&1 || break
+    as_fn_arith $ac_count + 1 && ac_count=$as_val
+    if test $ac_count -gt ${ac_path_EGREP_max-0}; then
+      # Best one so far, save it but keep looking for a better one
+      ac_cv_path_EGREP="$ac_path_EGREP"
+      ac_path_EGREP_max=$ac_count
+    fi
+    # 10*(2^10) chars as input seems more than enough
+    test $ac_count -gt 10 && break
+  done
+  rm -f conftest.in conftest.tmp conftest.nl conftest.out;;
+esac
+
+      $ac_path_EGREP_found && break 3
+    done
+  done
+  done
+IFS=$as_save_IFS
+  if test -z "$ac_cv_path_EGREP"; then
+    as_fn_error $? "no acceptable egrep could be found in $PATH$PATH_SEPARATOR/usr/xpg4/bin" "$LINENO" 5
+  fi
+else
+  ac_cv_path_EGREP=$EGREP
+fi
+
+   fi
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_path_EGREP" >&5
+$as_echo "$ac_cv_path_EGREP" >&6; }
+ EGREP="$ac_cv_path_EGREP"
+
+
+    else
+      # If it succeeded, then it was overridden by the user. We will use it
+      # for the tool.
+
+      # First remove it from the list of overridden variables, so we can test
+      # for unknown variables in the end.
+      CONFIGURE_OVERRIDDEN_VARIABLES="$try_remove_var"
+
+      # Check if the provided tool contains a complete path.
+      tool_specified="$EGREP"
+      tool_basename="${tool_specified##*/}"
+      if test "x$tool_basename" = "x$tool_specified"; then
+        # A command without a complete path is provided, search $PATH.
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool EGREP=$tool_basename" >&5
+$as_echo "$as_me: Will search for user supplied tool EGREP=$tool_basename" >&6;}
+        # Extract the first word of "$tool_basename", so it can be a program name with args.
+set dummy $tool_basename; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_path_EGREP+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $EGREP in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_EGREP="$EGREP" # Let the user override the test with a path.
+  ;;
+  *)
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_path_EGREP="$as_dir/$ac_word$ac_exec_ext"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+  ;;
+esac
+fi
+EGREP=$ac_cv_path_EGREP
+if test -n "$EGREP"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $EGREP" >&5
+$as_echo "$EGREP" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+        if test "x$EGREP" = x; then
+          as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
+        fi
+      else
+        # Otherwise we believe it is a complete path. Use it as it is.
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool EGREP=$tool_specified" >&5
+$as_echo "$as_me: Will use user supplied tool EGREP=$tool_specified" >&6;}
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for EGREP" >&5
+$as_echo_n "checking for EGREP... " >&6; }
+        if test ! -x "$tool_specified"; then
+          { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
+$as_echo "not found" >&6; }
+          as_fn_error $? "User supplied tool EGREP=$tool_specified does not exist or is not executable" "$LINENO" 5
+        fi
+        { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
+$as_echo "$tool_specified" >&6; }
+      fi
+    fi
+  fi
+
 
   if test "x$EGREP" = x; then
-    if test "x" = x; then
-      PROG_NAME=egrep
-    else
-      PROG_NAME=
-    fi
-    { $as_echo "$as_me:${as_lineno-$LINENO}: Could not find $PROG_NAME!" >&5
-$as_echo "$as_me: Could not find $PROG_NAME!" >&6;}
-    as_fn_error $? "Cannot continue" "$LINENO" 5
-  fi
-
-  { $as_echo "$as_me:${as_lineno-$LINENO}: checking for fgrep" >&5
+    as_fn_error $? "Could not find required tool for EGREP" "$LINENO" 5
+  fi
+
+
+
+
+  # Publish this variable in the help.
+
+
+  if test "x$FGREP" = x; then
+    # The variable is not set by user, try to locate tool using the code snippet
+    { $as_echo "$as_me:${as_lineno-$LINENO}: checking for fgrep" >&5
 $as_echo_n "checking for fgrep... " >&6; }
 if ${ac_cv_path_FGREP+:} false; then :
   $as_echo_n "(cached) " >&6
@@ -6300,19 +11928,175 @@
  FGREP="$ac_cv_path_FGREP"
 
 
+  else
+    # The variable is set, but is it from the command line or the environment?
+
+    # Try to remove the string !FGREP! from our list.
+    try_remove_var=${CONFIGURE_OVERRIDDEN_VARIABLES//!FGREP!/}
+    if test "x$try_remove_var" = "x$CONFIGURE_OVERRIDDEN_VARIABLES"; then
+      # If it failed, the variable was not from the command line. Ignore it,
+      # but warn the user (except for BASH, which is always set by the calling BASH).
+      if test "xFGREP" != xBASH; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: Ignoring value of FGREP from the environment. Use command line variables instead." >&5
+$as_echo "$as_me: WARNING: Ignoring value of FGREP from the environment. Use command line variables instead." >&2;}
+      fi
+      # Try to locate tool using the code snippet
+      { $as_echo "$as_me:${as_lineno-$LINENO}: checking for fgrep" >&5
+$as_echo_n "checking for fgrep... " >&6; }
+if ${ac_cv_path_FGREP+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  if echo 'ab*c' | $GREP -F 'ab*c' >/dev/null 2>&1
+   then ac_cv_path_FGREP="$GREP -F"
+   else
+     if test -z "$FGREP"; then
+  ac_path_FGREP_found=false
+  # Loop through the user's path and test for each of PROGNAME-LIST
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH$PATH_SEPARATOR/usr/xpg4/bin
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_prog in fgrep; do
+    for ac_exec_ext in '' $ac_executable_extensions; do
+      ac_path_FGREP="$as_dir/$ac_prog$ac_exec_ext"
+      as_fn_executable_p "$ac_path_FGREP" || continue
+# Check for GNU ac_path_FGREP and select it if it is found.
+  # Check for GNU $ac_path_FGREP
+case `"$ac_path_FGREP" --version 2>&1` in
+*GNU*)
+  ac_cv_path_FGREP="$ac_path_FGREP" ac_path_FGREP_found=:;;
+*)
+  ac_count=0
+  $as_echo_n 0123456789 >"conftest.in"
+  while :
+  do
+    cat "conftest.in" "conftest.in" >"conftest.tmp"
+    mv "conftest.tmp" "conftest.in"
+    cp "conftest.in" "conftest.nl"
+    $as_echo 'FGREP' >> "conftest.nl"
+    "$ac_path_FGREP" FGREP < "conftest.nl" >"conftest.out" 2>/dev/null || break
+    diff "conftest.out" "conftest.nl" >/dev/null 2>&1 || break
+    as_fn_arith $ac_count + 1 && ac_count=$as_val
+    if test $ac_count -gt ${ac_path_FGREP_max-0}; then
+      # Best one so far, save it but keep looking for a better one
+      ac_cv_path_FGREP="$ac_path_FGREP"
+      ac_path_FGREP_max=$ac_count
+    fi
+    # 10*(2^10) chars as input seems more than enough
+    test $ac_count -gt 10 && break
+  done
+  rm -f conftest.in conftest.tmp conftest.nl conftest.out;;
+esac
+
+      $ac_path_FGREP_found && break 3
+    done
+  done
+  done
+IFS=$as_save_IFS
+  if test -z "$ac_cv_path_FGREP"; then
+    as_fn_error $? "no acceptable fgrep could be found in $PATH$PATH_SEPARATOR/usr/xpg4/bin" "$LINENO" 5
+  fi
+else
+  ac_cv_path_FGREP=$FGREP
+fi
+
+   fi
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_path_FGREP" >&5
+$as_echo "$ac_cv_path_FGREP" >&6; }
+ FGREP="$ac_cv_path_FGREP"
+
+
+    else
+      # If it succeeded, then it was overridden by the user. We will use it
+      # for the tool.
+
+      # First remove it from the list of overridden variables, so we can test
+      # for unknown variables in the end.
+      CONFIGURE_OVERRIDDEN_VARIABLES="$try_remove_var"
+
+      # Check if the provided tool contains a complete path.
+      tool_specified="$FGREP"
+      tool_basename="${tool_specified##*/}"
+      if test "x$tool_basename" = "x$tool_specified"; then
+        # A command without a complete path is provided, search $PATH.
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool FGREP=$tool_basename" >&5
+$as_echo "$as_me: Will search for user supplied tool FGREP=$tool_basename" >&6;}
+        # Extract the first word of "$tool_basename", so it can be a program name with args.
+set dummy $tool_basename; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_path_FGREP+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $FGREP in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_FGREP="$FGREP" # Let the user override the test with a path.
+  ;;
+  *)
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_path_FGREP="$as_dir/$ac_word$ac_exec_ext"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+  ;;
+esac
+fi
+FGREP=$ac_cv_path_FGREP
+if test -n "$FGREP"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $FGREP" >&5
+$as_echo "$FGREP" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+        if test "x$FGREP" = x; then
+          as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
+        fi
+      else
+        # Otherwise we believe it is a complete path. Use it as it is.
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool FGREP=$tool_specified" >&5
+$as_echo "$as_me: Will use user supplied tool FGREP=$tool_specified" >&6;}
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for FGREP" >&5
+$as_echo_n "checking for FGREP... " >&6; }
+        if test ! -x "$tool_specified"; then
+          { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
+$as_echo "not found" >&6; }
+          as_fn_error $? "User supplied tool FGREP=$tool_specified does not exist or is not executable" "$LINENO" 5
+        fi
+        { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
+$as_echo "$tool_specified" >&6; }
+      fi
+    fi
+  fi
+
 
   if test "x$FGREP" = x; then
-    if test "x" = x; then
-      PROG_NAME=fgrep
-    else
-      PROG_NAME=
-    fi
-    { $as_echo "$as_me:${as_lineno-$LINENO}: Could not find $PROG_NAME!" >&5
-$as_echo "$as_me: Could not find $PROG_NAME!" >&6;}
-    as_fn_error $? "Cannot continue" "$LINENO" 5
-  fi
-
-  { $as_echo "$as_me:${as_lineno-$LINENO}: checking for a sed that does not truncate output" >&5
+    as_fn_error $? "Could not find required tool for FGREP" "$LINENO" 5
+  fi
+
+
+
+
+  # Publish this variable in the help.
+
+
+  if test "x$SED" = x; then
+    # The variable is not set by user, try to locate tool using the code snippet
+    { $as_echo "$as_me:${as_lineno-$LINENO}: checking for a sed that does not truncate output" >&5
 $as_echo_n "checking for a sed that does not truncate output... " >&6; }
 if ${ac_cv_path_SED+:} false; then :
   $as_echo_n "(cached) " >&6
@@ -6381,75 +12165,168 @@
  SED="$ac_cv_path_SED"
   rm -f conftest.sed
 
+  else
+    # The variable is set, but is it from the command line or the environment?
+
+    # Try to remove the string !SED! from our list.
+    try_remove_var=${CONFIGURE_OVERRIDDEN_VARIABLES//!SED!/}
+    if test "x$try_remove_var" = "x$CONFIGURE_OVERRIDDEN_VARIABLES"; then
+      # If it failed, the variable was not from the command line. Ignore it,
+      # but warn the user (except for BASH, which is always set by the calling BASH).
+      if test "xSED" != xBASH; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: Ignoring value of SED from the environment. Use command line variables instead." >&5
+$as_echo "$as_me: WARNING: Ignoring value of SED from the environment. Use command line variables instead." >&2;}
+      fi
+      # Try to locate tool using the code snippet
+      { $as_echo "$as_me:${as_lineno-$LINENO}: checking for a sed that does not truncate output" >&5
+$as_echo_n "checking for a sed that does not truncate output... " >&6; }
+if ${ac_cv_path_SED+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+            ac_script=s/aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa/bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb/
+     for ac_i in 1 2 3 4 5 6 7; do
+       ac_script="$ac_script$as_nl$ac_script"
+     done
+     echo "$ac_script" 2>/dev/null | sed 99q >conftest.sed
+     { ac_script=; unset ac_script;}
+     if test -z "$SED"; then
+  ac_path_SED_found=false
+  # Loop through the user's path and test for each of PROGNAME-LIST
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_prog in sed gsed; do
+    for ac_exec_ext in '' $ac_executable_extensions; do
+      ac_path_SED="$as_dir/$ac_prog$ac_exec_ext"
+      as_fn_executable_p "$ac_path_SED" || continue
+# Check for GNU ac_path_SED and select it if it is found.
+  # Check for GNU $ac_path_SED
+case `"$ac_path_SED" --version 2>&1` in
+*GNU*)
+  ac_cv_path_SED="$ac_path_SED" ac_path_SED_found=:;;
+*)
+  ac_count=0
+  $as_echo_n 0123456789 >"conftest.in"
+  while :
+  do
+    cat "conftest.in" "conftest.in" >"conftest.tmp"
+    mv "conftest.tmp" "conftest.in"
+    cp "conftest.in" "conftest.nl"
+    $as_echo '' >> "conftest.nl"
+    "$ac_path_SED" -f conftest.sed < "conftest.nl" >"conftest.out" 2>/dev/null || break
+    diff "conftest.out" "conftest.nl" >/dev/null 2>&1 || break
+    as_fn_arith $ac_count + 1 && ac_count=$as_val
+    if test $ac_count -gt ${ac_path_SED_max-0}; then
+      # Best one so far, save it but keep looking for a better one
+      ac_cv_path_SED="$ac_path_SED"
+      ac_path_SED_max=$ac_count
+    fi
+    # 10*(2^10) chars as input seems more than enough
+    test $ac_count -gt 10 && break
+  done
+  rm -f conftest.in conftest.tmp conftest.nl conftest.out;;
+esac
+
+      $ac_path_SED_found && break 3
+    done
+  done
+  done
+IFS=$as_save_IFS
+  if test -z "$ac_cv_path_SED"; then
+    as_fn_error $? "no acceptable sed could be found in \$PATH" "$LINENO" 5
+  fi
+else
+  ac_cv_path_SED=$SED
+fi
+
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_path_SED" >&5
+$as_echo "$ac_cv_path_SED" >&6; }
+ SED="$ac_cv_path_SED"
+  rm -f conftest.sed
+
+    else
+      # If it succeeded, then it was overridden by the user. We will use it
+      # for the tool.
+
+      # First remove it from the list of overridden variables, so we can test
+      # for unknown variables in the end.
+      CONFIGURE_OVERRIDDEN_VARIABLES="$try_remove_var"
+
+      # Check if the provided tool contains a complete path.
+      tool_specified="$SED"
+      tool_basename="${tool_specified##*/}"
+      if test "x$tool_basename" = "x$tool_specified"; then
+        # A command without a complete path is provided, search $PATH.
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool SED=$tool_basename" >&5
+$as_echo "$as_me: Will search for user supplied tool SED=$tool_basename" >&6;}
+        # Extract the first word of "$tool_basename", so it can be a program name with args.
+set dummy $tool_basename; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_path_SED+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $SED in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_SED="$SED" # Let the user override the test with a path.
+  ;;
+  *)
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_path_SED="$as_dir/$ac_word$ac_exec_ext"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+  ;;
+esac
+fi
+SED=$ac_cv_path_SED
+if test -n "$SED"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $SED" >&5
+$as_echo "$SED" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+        if test "x$SED" = x; then
+          as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
+        fi
+      else
+        # Otherwise we believe it is a complete path. Use it as it is.
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool SED=$tool_specified" >&5
+$as_echo "$as_me: Will use user supplied tool SED=$tool_specified" >&6;}
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for SED" >&5
+$as_echo_n "checking for SED... " >&6; }
+        if test ! -x "$tool_specified"; then
+          { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
+$as_echo "not found" >&6; }
+          as_fn_error $? "User supplied tool SED=$tool_specified does not exist or is not executable" "$LINENO" 5
+        fi
+        { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
+$as_echo "$tool_specified" >&6; }
+      fi
+    fi
+  fi
+
 
   if test "x$SED" = x; then
-    if test "x" = x; then
-      PROG_NAME=sed
-    else
-      PROG_NAME=
-    fi
-    { $as_echo "$as_me:${as_lineno-$LINENO}: Could not find $PROG_NAME!" >&5
-$as_echo "$as_me: Could not find $PROG_NAME!" >&6;}
-    as_fn_error $? "Cannot continue" "$LINENO" 5
-  fi
-
-
-  for ac_prog in nawk gawk awk
-do
-  # Extract the first word of "$ac_prog", so it can be a program name with args.
-set dummy $ac_prog; ac_word=$2
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
-$as_echo_n "checking for $ac_word... " >&6; }
-if ${ac_cv_path_NAWK+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
-  case $NAWK in
-  [\\/]* | ?:[\\/]*)
-  ac_cv_path_NAWK="$NAWK" # Let the user override the test with a path.
-  ;;
-  *)
-  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
-for as_dir in $PATH
-do
-  IFS=$as_save_IFS
-  test -z "$as_dir" && as_dir=.
-    for ac_exec_ext in '' $ac_executable_extensions; do
-  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
-    ac_cv_path_NAWK="$as_dir/$ac_word$ac_exec_ext"
-    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
-    break 2
-  fi
-done
-  done
-IFS=$as_save_IFS
-
-  ;;
-esac
-fi
-NAWK=$ac_cv_path_NAWK
-if test -n "$NAWK"; then
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $NAWK" >&5
-$as_echo "$NAWK" >&6; }
-else
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
-$as_echo "no" >&6; }
-fi
-
-
-  test -n "$NAWK" && break
-done
-
-
-  if test "x$NAWK" = x; then
-    if test "x" = x; then
-      PROG_NAME=nawk
-    else
-      PROG_NAME=
-    fi
-    { $as_echo "$as_me:${as_lineno-$LINENO}: Could not find $PROG_NAME!" >&5
-$as_echo "$as_me: Could not find $PROG_NAME!" >&6;}
-    as_fn_error $? "Cannot continue" "$LINENO" 5
-  fi
+    as_fn_error $? "Could not find required tool for SED" "$LINENO" 5
+  fi
+
 
 
   # Always force rm.
@@ -6460,8 +12337,133 @@
   THEPWDCMD=pwd
 
   # These are not required on all platforms
-  # Extract the first word of "cygpath", so it can be a program name with args.
-set dummy cygpath; ac_word=$2
+
+
+  # Publish this variable in the help.
+
+
+  if test "x$CYGPATH" = x; then
+    # The variable is not set by user, try to locate tool using the code snippet
+    for ac_prog in cygpath
+do
+  # Extract the first word of "$ac_prog", so it can be a program name with args.
+set dummy $ac_prog; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_path_CYGPATH+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $CYGPATH in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_CYGPATH="$CYGPATH" # Let the user override the test with a path.
+  ;;
+  *)
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_path_CYGPATH="$as_dir/$ac_word$ac_exec_ext"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+  ;;
+esac
+fi
+CYGPATH=$ac_cv_path_CYGPATH
+if test -n "$CYGPATH"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $CYGPATH" >&5
+$as_echo "$CYGPATH" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+  test -n "$CYGPATH" && break
+done
+
+  else
+    # The variable is set, but is it from the command line or the environment?
+
+    # Try to remove the string !CYGPATH! from our list.
+    try_remove_var=${CONFIGURE_OVERRIDDEN_VARIABLES//!CYGPATH!/}
+    if test "x$try_remove_var" = "x$CONFIGURE_OVERRIDDEN_VARIABLES"; then
+      # If it failed, the variable was not from the command line. Ignore it,
+      # but warn the user (except for BASH, which is always set by the calling BASH).
+      if test "xCYGPATH" != xBASH; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: Ignoring value of CYGPATH from the environment. Use command line variables instead." >&5
+$as_echo "$as_me: WARNING: Ignoring value of CYGPATH from the environment. Use command line variables instead." >&2;}
+      fi
+      # Try to locate tool using the code snippet
+      for ac_prog in cygpath
+do
+  # Extract the first word of "$ac_prog", so it can be a program name with args.
+set dummy $ac_prog; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_path_CYGPATH+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $CYGPATH in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_CYGPATH="$CYGPATH" # Let the user override the test with a path.
+  ;;
+  *)
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_path_CYGPATH="$as_dir/$ac_word$ac_exec_ext"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+  ;;
+esac
+fi
+CYGPATH=$ac_cv_path_CYGPATH
+if test -n "$CYGPATH"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $CYGPATH" >&5
+$as_echo "$CYGPATH" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+  test -n "$CYGPATH" && break
+done
+
+    else
+      # If it succeeded, then it was overridden by the user. We will use it
+      # for the tool.
+
+      # First remove it from the list of overridden variables, so we can test
+      # for unknown variables in the end.
+      CONFIGURE_OVERRIDDEN_VARIABLES="$try_remove_var"
+
+      # Check if the provided tool contains a complete path.
+      tool_specified="$CYGPATH"
+      tool_basename="${tool_specified##*/}"
+      if test "x$tool_basename" = "x$tool_specified"; then
+        # A command without a complete path is provided, search $PATH.
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool CYGPATH=$tool_basename" >&5
+$as_echo "$as_me: Will search for user supplied tool CYGPATH=$tool_basename" >&6;}
+        # Extract the first word of "$tool_basename", so it can be a program name with args.
+set dummy $tool_basename; ac_word=$2
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 $as_echo_n "checking for $ac_word... " >&6; }
 if ${ac_cv_path_CYGPATH+:} false; then :
@@ -6500,8 +12502,154 @@
 fi
 
 
-  # Extract the first word of "readlink", so it can be a program name with args.
-set dummy readlink; ac_word=$2
+        if test "x$CYGPATH" = x; then
+          as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
+        fi
+      else
+        # Otherwise we believe it is a complete path. Use it as it is.
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool CYGPATH=$tool_specified" >&5
+$as_echo "$as_me: Will use user supplied tool CYGPATH=$tool_specified" >&6;}
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for CYGPATH" >&5
+$as_echo_n "checking for CYGPATH... " >&6; }
+        if test ! -x "$tool_specified"; then
+          { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
+$as_echo "not found" >&6; }
+          as_fn_error $? "User supplied tool CYGPATH=$tool_specified does not exist or is not executable" "$LINENO" 5
+        fi
+        { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
+$as_echo "$tool_specified" >&6; }
+      fi
+    fi
+  fi
+
+
+
+
+  # Publish this variable in the help.
+
+
+  if test "x$READLINK" = x; then
+    # The variable is not set by user, try to locate tool using the code snippet
+    for ac_prog in greadlink readlink
+do
+  # Extract the first word of "$ac_prog", so it can be a program name with args.
+set dummy $ac_prog; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_path_READLINK+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $READLINK in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_READLINK="$READLINK" # Let the user override the test with a path.
+  ;;
+  *)
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_path_READLINK="$as_dir/$ac_word$ac_exec_ext"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+  ;;
+esac
+fi
+READLINK=$ac_cv_path_READLINK
+if test -n "$READLINK"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $READLINK" >&5
+$as_echo "$READLINK" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+  test -n "$READLINK" && break
+done
+
+  else
+    # The variable is set, but is it from the command line or the environment?
+
+    # Try to remove the string !READLINK! from our list.
+    try_remove_var=${CONFIGURE_OVERRIDDEN_VARIABLES//!READLINK!/}
+    if test "x$try_remove_var" = "x$CONFIGURE_OVERRIDDEN_VARIABLES"; then
+      # If it failed, the variable was not from the command line. Ignore it,
+      # but warn the user (except for BASH, which is always set by the calling BASH).
+      if test "xREADLINK" != xBASH; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: Ignoring value of READLINK from the environment. Use command line variables instead." >&5
+$as_echo "$as_me: WARNING: Ignoring value of READLINK from the environment. Use command line variables instead." >&2;}
+      fi
+      # Try to locate tool using the code snippet
+      for ac_prog in greadlink readlink
+do
+  # Extract the first word of "$ac_prog", so it can be a program name with args.
+set dummy $ac_prog; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_path_READLINK+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $READLINK in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_READLINK="$READLINK" # Let the user override the test with a path.
+  ;;
+  *)
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_path_READLINK="$as_dir/$ac_word$ac_exec_ext"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+  ;;
+esac
+fi
+READLINK=$ac_cv_path_READLINK
+if test -n "$READLINK"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $READLINK" >&5
+$as_echo "$READLINK" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+  test -n "$READLINK" && break
+done
+
+    else
+      # If it succeeded, then it was overridden by the user. We will use it
+      # for the tool.
+
+      # First remove it from the list of overridden variables, so we can test
+      # for unknown variables in the end.
+      CONFIGURE_OVERRIDDEN_VARIABLES="$try_remove_var"
+
+      # Check if the provided tool contains a complete path.
+      tool_specified="$READLINK"
+      tool_basename="${tool_specified##*/}"
+      if test "x$tool_basename" = "x$tool_specified"; then
+        # A command without a complete path is provided, search $PATH.
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool READLINK=$tool_basename" >&5
+$as_echo "$as_me: Will search for user supplied tool READLINK=$tool_basename" >&6;}
+        # Extract the first word of "$tool_basename", so it can be a program name with args.
+set dummy $tool_basename; ac_word=$2
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 $as_echo_n "checking for $ac_word... " >&6; }
 if ${ac_cv_path_READLINK+:} false; then :
@@ -6540,8 +12688,154 @@
 fi
 
 
-  # Extract the first word of "df", so it can be a program name with args.
-set dummy df; ac_word=$2
+        if test "x$READLINK" = x; then
+          as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
+        fi
+      else
+        # Otherwise we believe it is a complete path. Use it as it is.
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool READLINK=$tool_specified" >&5
+$as_echo "$as_me: Will use user supplied tool READLINK=$tool_specified" >&6;}
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for READLINK" >&5
+$as_echo_n "checking for READLINK... " >&6; }
+        if test ! -x "$tool_specified"; then
+          { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
+$as_echo "not found" >&6; }
+          as_fn_error $? "User supplied tool READLINK=$tool_specified does not exist or is not executable" "$LINENO" 5
+        fi
+        { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
+$as_echo "$tool_specified" >&6; }
+      fi
+    fi
+  fi
+
+
+
+
+  # Publish this variable in the help.
+
+
+  if test "x$DF" = x; then
+    # The variable is not set by user, try to locate tool using the code snippet
+    for ac_prog in df
+do
+  # Extract the first word of "$ac_prog", so it can be a program name with args.
+set dummy $ac_prog; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_path_DF+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $DF in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_DF="$DF" # Let the user override the test with a path.
+  ;;
+  *)
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_path_DF="$as_dir/$ac_word$ac_exec_ext"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+  ;;
+esac
+fi
+DF=$ac_cv_path_DF
+if test -n "$DF"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $DF" >&5
+$as_echo "$DF" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+  test -n "$DF" && break
+done
+
+  else
+    # The variable is set, but is it from the command line or the environment?
+
+    # Try to remove the string !DF! from our list.
+    try_remove_var=${CONFIGURE_OVERRIDDEN_VARIABLES//!DF!/}
+    if test "x$try_remove_var" = "x$CONFIGURE_OVERRIDDEN_VARIABLES"; then
+      # If it failed, the variable was not from the command line. Ignore it,
+      # but warn the user (except for BASH, which is always set by the calling BASH).
+      if test "xDF" != xBASH; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: Ignoring value of DF from the environment. Use command line variables instead." >&5
+$as_echo "$as_me: WARNING: Ignoring value of DF from the environment. Use command line variables instead." >&2;}
+      fi
+      # Try to locate tool using the code snippet
+      for ac_prog in df
+do
+  # Extract the first word of "$ac_prog", so it can be a program name with args.
+set dummy $ac_prog; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_path_DF+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $DF in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_DF="$DF" # Let the user override the test with a path.
+  ;;
+  *)
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_path_DF="$as_dir/$ac_word$ac_exec_ext"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+  ;;
+esac
+fi
+DF=$ac_cv_path_DF
+if test -n "$DF"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $DF" >&5
+$as_echo "$DF" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+  test -n "$DF" && break
+done
+
+    else
+      # If it succeeded, then it was overridden by the user. We will use it
+      # for the tool.
+
+      # First remove it from the list of overridden variables, so we can test
+      # for unknown variables in the end.
+      CONFIGURE_OVERRIDDEN_VARIABLES="$try_remove_var"
+
+      # Check if the provided tool contains a complete path.
+      tool_specified="$DF"
+      tool_basename="${tool_specified##*/}"
+      if test "x$tool_basename" = "x$tool_specified"; then
+        # A command without a complete path is provided, search $PATH.
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool DF=$tool_basename" >&5
+$as_echo "$as_me: Will search for user supplied tool DF=$tool_basename" >&6;}
+        # Extract the first word of "$tool_basename", so it can be a program name with args.
+set dummy $tool_basename; ac_word=$2
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 $as_echo_n "checking for $ac_word... " >&6; }
 if ${ac_cv_path_DF+:} false; then :
@@ -6580,8 +12874,38 @@
 fi
 
 
-  # Extract the first word of "SetFile", so it can be a program name with args.
-set dummy SetFile; ac_word=$2
+        if test "x$DF" = x; then
+          as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
+        fi
+      else
+        # Otherwise we believe it is a complete path. Use it as it is.
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool DF=$tool_specified" >&5
+$as_echo "$as_me: Will use user supplied tool DF=$tool_specified" >&6;}
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for DF" >&5
+$as_echo_n "checking for DF... " >&6; }
+        if test ! -x "$tool_specified"; then
+          { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
+$as_echo "not found" >&6; }
+          as_fn_error $? "User supplied tool DF=$tool_specified does not exist or is not executable" "$LINENO" 5
+        fi
+        { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
+$as_echo "$tool_specified" >&6; }
+      fi
+    fi
+  fi
+
+
+
+
+  # Publish this variable in the help.
+
+
+  if test "x$SETFILE" = x; then
+    # The variable is not set by user, try to locate tool using the code snippet
+    for ac_prog in SetFile
+do
+  # Extract the first word of "$ac_prog", so it can be a program name with args.
+set dummy $ac_prog; ac_word=$2
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 $as_echo_n "checking for $ac_word... " >&6; }
 if ${ac_cv_path_SETFILE+:} false; then :
@@ -6620,6 +12944,143 @@
 fi
 
 
+  test -n "$SETFILE" && break
+done
+
+  else
+    # The variable is set, but is it from the command line or the environment?
+
+    # Try to remove the string !SETFILE! from our list.
+    try_remove_var=${CONFIGURE_OVERRIDDEN_VARIABLES//!SETFILE!/}
+    if test "x$try_remove_var" = "x$CONFIGURE_OVERRIDDEN_VARIABLES"; then
+      # If it failed, the variable was not from the command line. Ignore it,
+      # but warn the user (except for BASH, which is always set by the calling BASH).
+      if test "xSETFILE" != xBASH; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: Ignoring value of SETFILE from the environment. Use command line variables instead." >&5
+$as_echo "$as_me: WARNING: Ignoring value of SETFILE from the environment. Use command line variables instead." >&2;}
+      fi
+      # Try to locate tool using the code snippet
+      for ac_prog in SetFile
+do
+  # Extract the first word of "$ac_prog", so it can be a program name with args.
+set dummy $ac_prog; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_path_SETFILE+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $SETFILE in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_SETFILE="$SETFILE" # Let the user override the test with a path.
+  ;;
+  *)
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_path_SETFILE="$as_dir/$ac_word$ac_exec_ext"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+  ;;
+esac
+fi
+SETFILE=$ac_cv_path_SETFILE
+if test -n "$SETFILE"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $SETFILE" >&5
+$as_echo "$SETFILE" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+  test -n "$SETFILE" && break
+done
+
+    else
+      # If it succeeded, then it was overridden by the user. We will use it
+      # for the tool.
+
+      # First remove it from the list of overridden variables, so we can test
+      # for unknown variables in the end.
+      CONFIGURE_OVERRIDDEN_VARIABLES="$try_remove_var"
+
+      # Check if the provided tool contains a complete path.
+      tool_specified="$SETFILE"
+      tool_basename="${tool_specified##*/}"
+      if test "x$tool_basename" = "x$tool_specified"; then
+        # A command without a complete path is provided, search $PATH.
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool SETFILE=$tool_basename" >&5
+$as_echo "$as_me: Will search for user supplied tool SETFILE=$tool_basename" >&6;}
+        # Extract the first word of "$tool_basename", so it can be a program name with args.
+set dummy $tool_basename; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_path_SETFILE+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $SETFILE in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_SETFILE="$SETFILE" # Let the user override the test with a path.
+  ;;
+  *)
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_path_SETFILE="$as_dir/$ac_word$ac_exec_ext"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+  ;;
+esac
+fi
+SETFILE=$ac_cv_path_SETFILE
+if test -n "$SETFILE"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $SETFILE" >&5
+$as_echo "$SETFILE" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+        if test "x$SETFILE" = x; then
+          as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
+        fi
+      else
+        # Otherwise we believe it is a complete path. Use it as it is.
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool SETFILE=$tool_specified" >&5
+$as_echo "$as_me: Will use user supplied tool SETFILE=$tool_specified" >&6;}
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for SETFILE" >&5
+$as_echo_n "checking for SETFILE... " >&6; }
+        if test ! -x "$tool_specified"; then
+          { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
+$as_echo "not found" >&6; }
+          as_fn_error $? "User supplied tool SETFILE=$tool_specified does not exist or is not executable" "$LINENO" 5
+        fi
+        { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
+$as_echo "$tool_specified" >&6; }
+      fi
+    fi
+  fi
+
+
 
 
 # Now we can determine OpenJDK build and target platforms. This is required to
@@ -10139,7 +16600,72 @@
   # These tools might not be installed by default,
   # need hint on how to install them.
 
-  for ac_prog in unzip
+
+
+  # Publish this variable in the help.
+
+
+  if test "x$UNZIP" = x; then
+    # The variable is not set by user, try to locate tool using the code snippet
+    for ac_prog in unzip
+do
+  # Extract the first word of "$ac_prog", so it can be a program name with args.
+set dummy $ac_prog; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_path_UNZIP+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $UNZIP in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_UNZIP="$UNZIP" # Let the user override the test with a path.
+  ;;
+  *)
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_path_UNZIP="$as_dir/$ac_word$ac_exec_ext"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+  ;;
+esac
+fi
+UNZIP=$ac_cv_path_UNZIP
+if test -n "$UNZIP"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $UNZIP" >&5
+$as_echo "$UNZIP" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+  test -n "$UNZIP" && break
+done
+
+  else
+    # The variable is set, but is it from the command line or the environment?
+
+    # Try to remove the string !UNZIP! from our list.
+    try_remove_var=${CONFIGURE_OVERRIDDEN_VARIABLES//!UNZIP!/}
+    if test "x$try_remove_var" = "x$CONFIGURE_OVERRIDDEN_VARIABLES"; then
+      # If it failed, the variable was not from the command line. Ignore it,
+      # but warn the user (except for BASH, which is always set by the calling BASH).
+      if test "xUNZIP" != xBASH; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: Ignoring value of UNZIP from the environment. Use command line variables instead." >&5
+$as_echo "$as_me: WARNING: Ignoring value of UNZIP from the environment. Use command line variables instead." >&2;}
+      fi
+      # Try to locate tool using the code snippet
+      for ac_prog in unzip
 do
   # Extract the first word of "$ac_prog", so it can be a program name with args.
 set dummy $ac_prog; ac_word=$2
@@ -10184,21 +16710,155 @@
   test -n "$UNZIP" && break
 done
 
+    else
+      # If it succeeded, then it was overridden by the user. We will use it
+      # for the tool.
+
+      # First remove it from the list of overridden variables, so we can test
+      # for unknown variables in the end.
+      CONFIGURE_OVERRIDDEN_VARIABLES="$try_remove_var"
+
+      # Check if the provided tool contains a complete path.
+      tool_specified="$UNZIP"
+      tool_basename="${tool_specified##*/}"
+      if test "x$tool_basename" = "x$tool_specified"; then
+        # A command without a complete path is provided, search $PATH.
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool UNZIP=$tool_basename" >&5
+$as_echo "$as_me: Will search for user supplied tool UNZIP=$tool_basename" >&6;}
+        # Extract the first word of "$tool_basename", so it can be a program name with args.
+set dummy $tool_basename; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_path_UNZIP+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $UNZIP in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_UNZIP="$UNZIP" # Let the user override the test with a path.
+  ;;
+  *)
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_path_UNZIP="$as_dir/$ac_word$ac_exec_ext"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+  ;;
+esac
+fi
+UNZIP=$ac_cv_path_UNZIP
+if test -n "$UNZIP"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $UNZIP" >&5
+$as_echo "$UNZIP" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+        if test "x$UNZIP" = x; then
+          as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
+        fi
+      else
+        # Otherwise we believe it is a complete path. Use it as it is.
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool UNZIP=$tool_specified" >&5
+$as_echo "$as_me: Will use user supplied tool UNZIP=$tool_specified" >&6;}
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for UNZIP" >&5
+$as_echo_n "checking for UNZIP... " >&6; }
+        if test ! -x "$tool_specified"; then
+          { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
+$as_echo "not found" >&6; }
+          as_fn_error $? "User supplied tool UNZIP=$tool_specified does not exist or is not executable" "$LINENO" 5
+        fi
+        { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
+$as_echo "$tool_specified" >&6; }
+      fi
+    fi
+  fi
+
+
 
   if test "x$UNZIP" = x; then
-    if test "xunzip" = x; then
-      PROG_NAME=unzip
-    else
-      PROG_NAME=unzip
-    fi
-    { $as_echo "$as_me:${as_lineno-$LINENO}: Could not find $PROG_NAME!" >&5
-$as_echo "$as_me: Could not find $PROG_NAME!" >&6;}
-    as_fn_error $? "Cannot continue" "$LINENO" 5
-  fi
-
-
-
-  for ac_prog in zip
+    as_fn_error $? "Could not find required tool for UNZIP" "$LINENO" 5
+  fi
+
+
+
+
+
+  # Publish this variable in the help.
+
+
+  if test "x$ZIP" = x; then
+    # The variable is not set by user, try to locate tool using the code snippet
+    for ac_prog in zip
+do
+  # Extract the first word of "$ac_prog", so it can be a program name with args.
+set dummy $ac_prog; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_path_ZIP+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $ZIP in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_ZIP="$ZIP" # Let the user override the test with a path.
+  ;;
+  *)
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_path_ZIP="$as_dir/$ac_word$ac_exec_ext"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+  ;;
+esac
+fi
+ZIP=$ac_cv_path_ZIP
+if test -n "$ZIP"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ZIP" >&5
+$as_echo "$ZIP" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+  test -n "$ZIP" && break
+done
+
+  else
+    # The variable is set, but is it from the command line or the environment?
+
+    # Try to remove the string !ZIP! from our list.
+    try_remove_var=${CONFIGURE_OVERRIDDEN_VARIABLES//!ZIP!/}
+    if test "x$try_remove_var" = "x$CONFIGURE_OVERRIDDEN_VARIABLES"; then
+      # If it failed, the variable was not from the command line. Ignore it,
+      # but warn the user (except for BASH, which is always set by the calling BASH).
+      if test "xZIP" != xBASH; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: Ignoring value of ZIP from the environment. Use command line variables instead." >&5
+$as_echo "$as_me: WARNING: Ignoring value of ZIP from the environment. Use command line variables instead." >&2;}
+      fi
+      # Try to locate tool using the code snippet
+      for ac_prog in zip
 do
   # Extract the first word of "$ac_prog", so it can be a program name with args.
 set dummy $ac_prog; ac_word=$2
@@ -10243,24 +16903,218 @@
   test -n "$ZIP" && break
 done
 
+    else
+      # If it succeeded, then it was overridden by the user. We will use it
+      # for the tool.
+
+      # First remove it from the list of overridden variables, so we can test
+      # for unknown variables in the end.
+      CONFIGURE_OVERRIDDEN_VARIABLES="$try_remove_var"
+
+      # Check if the provided tool contains a complete path.
+      tool_specified="$ZIP"
+      tool_basename="${tool_specified##*/}"
+      if test "x$tool_basename" = "x$tool_specified"; then
+        # A command without a complete path is provided, search $PATH.
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool ZIP=$tool_basename" >&5
+$as_echo "$as_me: Will search for user supplied tool ZIP=$tool_basename" >&6;}
+        # Extract the first word of "$tool_basename", so it can be a program name with args.
+set dummy $tool_basename; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_path_ZIP+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $ZIP in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_ZIP="$ZIP" # Let the user override the test with a path.
+  ;;
+  *)
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_path_ZIP="$as_dir/$ac_word$ac_exec_ext"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+  ;;
+esac
+fi
+ZIP=$ac_cv_path_ZIP
+if test -n "$ZIP"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ZIP" >&5
+$as_echo "$ZIP" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+        if test "x$ZIP" = x; then
+          as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
+        fi
+      else
+        # Otherwise we believe it is a complete path. Use it as it is.
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool ZIP=$tool_specified" >&5
+$as_echo "$as_me: Will use user supplied tool ZIP=$tool_specified" >&6;}
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for ZIP" >&5
+$as_echo_n "checking for ZIP... " >&6; }
+        if test ! -x "$tool_specified"; then
+          { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
+$as_echo "not found" >&6; }
+          as_fn_error $? "User supplied tool ZIP=$tool_specified does not exist or is not executable" "$LINENO" 5
+        fi
+        { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
+$as_echo "$tool_specified" >&6; }
+      fi
+    fi
+  fi
+
+
 
   if test "x$ZIP" = x; then
-    if test "xzip" = x; then
-      PROG_NAME=zip
-    else
-      PROG_NAME=zip
-    fi
-    { $as_echo "$as_me:${as_lineno-$LINENO}: Could not find $PROG_NAME!" >&5
-$as_echo "$as_me: Could not find $PROG_NAME!" >&6;}
-    as_fn_error $? "Cannot continue" "$LINENO" 5
+    as_fn_error $? "Could not find required tool for ZIP" "$LINENO" 5
   fi
 
 
 
   # Non-required basic tools
 
-  # Extract the first word of "ldd", so it can be a program name with args.
-set dummy ldd; ac_word=$2
+
+
+  # Publish this variable in the help.
+
+
+  if test "x$LDD" = x; then
+    # The variable is not set by user, try to locate tool using the code snippet
+    for ac_prog in ldd
+do
+  # Extract the first word of "$ac_prog", so it can be a program name with args.
+set dummy $ac_prog; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_path_LDD+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $LDD in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_LDD="$LDD" # Let the user override the test with a path.
+  ;;
+  *)
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_path_LDD="$as_dir/$ac_word$ac_exec_ext"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+  ;;
+esac
+fi
+LDD=$ac_cv_path_LDD
+if test -n "$LDD"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $LDD" >&5
+$as_echo "$LDD" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+  test -n "$LDD" && break
+done
+
+  else
+    # The variable is set, but is it from the command line or the environment?
+
+    # Try to remove the string !LDD! from our list.
+    try_remove_var=${CONFIGURE_OVERRIDDEN_VARIABLES//!LDD!/}
+    if test "x$try_remove_var" = "x$CONFIGURE_OVERRIDDEN_VARIABLES"; then
+      # If it failed, the variable was not from the command line. Ignore it,
+      # but warn the user (except for BASH, which is always set by the calling BASH).
+      if test "xLDD" != xBASH; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: Ignoring value of LDD from the environment. Use command line variables instead." >&5
+$as_echo "$as_me: WARNING: Ignoring value of LDD from the environment. Use command line variables instead." >&2;}
+      fi
+      # Try to locate tool using the code snippet
+      for ac_prog in ldd
+do
+  # Extract the first word of "$ac_prog", so it can be a program name with args.
+set dummy $ac_prog; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_path_LDD+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $LDD in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_LDD="$LDD" # Let the user override the test with a path.
+  ;;
+  *)
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_path_LDD="$as_dir/$ac_word$ac_exec_ext"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+  ;;
+esac
+fi
+LDD=$ac_cv_path_LDD
+if test -n "$LDD"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $LDD" >&5
+$as_echo "$LDD" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+  test -n "$LDD" && break
+done
+
+    else
+      # If it succeeded, then it was overridden by the user. We will use it
+      # for the tool.
+
+      # First remove it from the list of overridden variables, so we can test
+      # for unknown variables in the end.
+      CONFIGURE_OVERRIDDEN_VARIABLES="$try_remove_var"
+
+      # Check if the provided tool contains a complete path.
+      tool_specified="$LDD"
+      tool_basename="${tool_specified##*/}"
+      if test "x$tool_basename" = "x$tool_specified"; then
+        # A command without a complete path is provided, search $PATH.
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool LDD=$tool_basename" >&5
+$as_echo "$as_me: Will search for user supplied tool LDD=$tool_basename" >&6;}
+        # Extract the first word of "$tool_basename", so it can be a program name with args.
+set dummy $tool_basename; ac_word=$2
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 $as_echo_n "checking for $ac_word... " >&6; }
 if ${ac_cv_path_LDD+:} false; then :
@@ -10299,14 +17153,102 @@
 fi
 
 
+        if test "x$LDD" = x; then
+          as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
+        fi
+      else
+        # Otherwise we believe it is a complete path. Use it as it is.
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool LDD=$tool_specified" >&5
+$as_echo "$as_me: Will use user supplied tool LDD=$tool_specified" >&6;}
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for LDD" >&5
+$as_echo_n "checking for LDD... " >&6; }
+        if test ! -x "$tool_specified"; then
+          { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
+$as_echo "not found" >&6; }
+          as_fn_error $? "User supplied tool LDD=$tool_specified does not exist or is not executable" "$LINENO" 5
+        fi
+        { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
+$as_echo "$tool_specified" >&6; }
+      fi
+    fi
+  fi
+
+
   if test "x$LDD" = "x"; then
     # List shared lib dependencies is used for
     # debug output and checking for forbidden dependencies.
     # We can build without it.
     LDD="true"
   fi
-  # Extract the first word of "otool", so it can be a program name with args.
-set dummy otool; ac_word=$2
+
+
+  # Publish this variable in the help.
+
+
+  if test "x$OTOOL" = x; then
+    # The variable is not set by user, try to locate tool using the code snippet
+    for ac_prog in otool
+do
+  # Extract the first word of "$ac_prog", so it can be a program name with args.
+set dummy $ac_prog; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_path_OTOOL+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $OTOOL in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_OTOOL="$OTOOL" # Let the user override the test with a path.
+  ;;
+  *)
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_path_OTOOL="$as_dir/$ac_word$ac_exec_ext"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+  ;;
+esac
+fi
+OTOOL=$ac_cv_path_OTOOL
+if test -n "$OTOOL"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $OTOOL" >&5
+$as_echo "$OTOOL" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+  test -n "$OTOOL" && break
+done
+
+  else
+    # The variable is set, but is it from the command line or the environment?
+
+    # Try to remove the string !OTOOL! from our list.
+    try_remove_var=${CONFIGURE_OVERRIDDEN_VARIABLES//!OTOOL!/}
+    if test "x$try_remove_var" = "x$CONFIGURE_OVERRIDDEN_VARIABLES"; then
+      # If it failed, the variable was not from the command line. Ignore it,
+      # but warn the user (except for BASH, which is always set by the calling BASH).
+      if test "xOTOOL" != xBASH; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: Ignoring value of OTOOL from the environment. Use command line variables instead." >&5
+$as_echo "$as_me: WARNING: Ignoring value of OTOOL from the environment. Use command line variables instead." >&2;}
+      fi
+      # Try to locate tool using the code snippet
+      for ac_prog in otool
+do
+  # Extract the first word of "$ac_prog", so it can be a program name with args.
+set dummy $ac_prog; ac_word=$2
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 $as_echo_n "checking for $ac_word... " >&6; }
 if ${ac_cv_path_OTOOL+:} false; then :
@@ -10345,10 +17287,154 @@
 fi
 
 
+  test -n "$OTOOL" && break
+done
+
+    else
+      # If it succeeded, then it was overridden by the user. We will use it
+      # for the tool.
+
+      # First remove it from the list of overridden variables, so we can test
+      # for unknown variables in the end.
+      CONFIGURE_OVERRIDDEN_VARIABLES="$try_remove_var"
+
+      # Check if the provided tool contains a complete path.
+      tool_specified="$OTOOL"
+      tool_basename="${tool_specified##*/}"
+      if test "x$tool_basename" = "x$tool_specified"; then
+        # A command without a complete path is provided, search $PATH.
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool OTOOL=$tool_basename" >&5
+$as_echo "$as_me: Will search for user supplied tool OTOOL=$tool_basename" >&6;}
+        # Extract the first word of "$tool_basename", so it can be a program name with args.
+set dummy $tool_basename; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_path_OTOOL+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $OTOOL in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_OTOOL="$OTOOL" # Let the user override the test with a path.
+  ;;
+  *)
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_path_OTOOL="$as_dir/$ac_word$ac_exec_ext"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+  ;;
+esac
+fi
+OTOOL=$ac_cv_path_OTOOL
+if test -n "$OTOOL"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $OTOOL" >&5
+$as_echo "$OTOOL" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+        if test "x$OTOOL" = x; then
+          as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
+        fi
+      else
+        # Otherwise we believe it is a complete path. Use it as it is.
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool OTOOL=$tool_specified" >&5
+$as_echo "$as_me: Will use user supplied tool OTOOL=$tool_specified" >&6;}
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for OTOOL" >&5
+$as_echo_n "checking for OTOOL... " >&6; }
+        if test ! -x "$tool_specified"; then
+          { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
+$as_echo "not found" >&6; }
+          as_fn_error $? "User supplied tool OTOOL=$tool_specified does not exist or is not executable" "$LINENO" 5
+        fi
+        { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
+$as_echo "$tool_specified" >&6; }
+      fi
+    fi
+  fi
+
+
   if test "x$OTOOL" = "x"; then
     OTOOL="true"
   fi
-  for ac_prog in readelf greadelf
+
+
+  # Publish this variable in the help.
+
+
+  if test "x$READELF" = x; then
+    # The variable is not set by user, try to locate tool using the code snippet
+    for ac_prog in greadelf readelf
+do
+  # Extract the first word of "$ac_prog", so it can be a program name with args.
+set dummy $ac_prog; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_path_READELF+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $READELF in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_READELF="$READELF" # Let the user override the test with a path.
+  ;;
+  *)
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_path_READELF="$as_dir/$ac_word$ac_exec_ext"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+  ;;
+esac
+fi
+READELF=$ac_cv_path_READELF
+if test -n "$READELF"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $READELF" >&5
+$as_echo "$READELF" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+  test -n "$READELF" && break
+done
+
+  else
+    # The variable is set, but is it from the command line or the environment?
+
+    # Try to remove the string !READELF! from our list.
+    try_remove_var=${CONFIGURE_OVERRIDDEN_VARIABLES//!READELF!/}
+    if test "x$try_remove_var" = "x$CONFIGURE_OVERRIDDEN_VARIABLES"; then
+      # If it failed, the variable was not from the command line. Ignore it,
+      # but warn the user (except for BASH, which is always set by the calling BASH).
+      if test "xREADELF" != xBASH; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: Ignoring value of READELF from the environment. Use command line variables instead." >&5
+$as_echo "$as_me: WARNING: Ignoring value of READELF from the environment. Use command line variables instead." >&2;}
+      fi
+      # Try to locate tool using the code snippet
+      for ac_prog in greadelf readelf
 do
   # Extract the first word of "$ac_prog", so it can be a program name with args.
 set dummy $ac_prog; ac_word=$2
@@ -10393,8 +17479,209 @@
   test -n "$READELF" && break
 done
 
-  # Extract the first word of "hg", so it can be a program name with args.
-set dummy hg; ac_word=$2
+    else
+      # If it succeeded, then it was overridden by the user. We will use it
+      # for the tool.
+
+      # First remove it from the list of overridden variables, so we can test
+      # for unknown variables in the end.
+      CONFIGURE_OVERRIDDEN_VARIABLES="$try_remove_var"
+
+      # Check if the provided tool contains a complete path.
+      tool_specified="$READELF"
+      tool_basename="${tool_specified##*/}"
+      if test "x$tool_basename" = "x$tool_specified"; then
+        # A command without a complete path is provided, search $PATH.
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool READELF=$tool_basename" >&5
+$as_echo "$as_me: Will search for user supplied tool READELF=$tool_basename" >&6;}
+        # Extract the first word of "$tool_basename", so it can be a program name with args.
+set dummy $tool_basename; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_path_READELF+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $READELF in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_READELF="$READELF" # Let the user override the test with a path.
+  ;;
+  *)
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_path_READELF="$as_dir/$ac_word$ac_exec_ext"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+  ;;
+esac
+fi
+READELF=$ac_cv_path_READELF
+if test -n "$READELF"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $READELF" >&5
+$as_echo "$READELF" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+        if test "x$READELF" = x; then
+          as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
+        fi
+      else
+        # Otherwise we believe it is a complete path. Use it as it is.
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool READELF=$tool_specified" >&5
+$as_echo "$as_me: Will use user supplied tool READELF=$tool_specified" >&6;}
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for READELF" >&5
+$as_echo_n "checking for READELF... " >&6; }
+        if test ! -x "$tool_specified"; then
+          { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
+$as_echo "not found" >&6; }
+          as_fn_error $? "User supplied tool READELF=$tool_specified does not exist or is not executable" "$LINENO" 5
+        fi
+        { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
+$as_echo "$tool_specified" >&6; }
+      fi
+    fi
+  fi
+
+
+
+
+  # Publish this variable in the help.
+
+
+  if test "x$HG" = x; then
+    # The variable is not set by user, try to locate tool using the code snippet
+    for ac_prog in hg
+do
+  # Extract the first word of "$ac_prog", so it can be a program name with args.
+set dummy $ac_prog; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_path_HG+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $HG in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_HG="$HG" # Let the user override the test with a path.
+  ;;
+  *)
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_path_HG="$as_dir/$ac_word$ac_exec_ext"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+  ;;
+esac
+fi
+HG=$ac_cv_path_HG
+if test -n "$HG"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $HG" >&5
+$as_echo "$HG" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+  test -n "$HG" && break
+done
+
+  else
+    # The variable is set, but is it from the command line or the environment?
+
+    # Try to remove the string !HG! from our list.
+    try_remove_var=${CONFIGURE_OVERRIDDEN_VARIABLES//!HG!/}
+    if test "x$try_remove_var" = "x$CONFIGURE_OVERRIDDEN_VARIABLES"; then
+      # If it failed, the variable was not from the command line. Ignore it,
+      # but warn the user (except for BASH, which is always set by the calling BASH).
+      if test "xHG" != xBASH; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: Ignoring value of HG from the environment. Use command line variables instead." >&5
+$as_echo "$as_me: WARNING: Ignoring value of HG from the environment. Use command line variables instead." >&2;}
+      fi
+      # Try to locate tool using the code snippet
+      for ac_prog in hg
+do
+  # Extract the first word of "$ac_prog", so it can be a program name with args.
+set dummy $ac_prog; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_path_HG+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $HG in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_HG="$HG" # Let the user override the test with a path.
+  ;;
+  *)
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_path_HG="$as_dir/$ac_word$ac_exec_ext"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+  ;;
+esac
+fi
+HG=$ac_cv_path_HG
+if test -n "$HG"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $HG" >&5
+$as_echo "$HG" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+  test -n "$HG" && break
+done
+
+    else
+      # If it succeeded, then it was overridden by the user. We will use it
+      # for the tool.
+
+      # First remove it from the list of overridden variables, so we can test
+      # for unknown variables in the end.
+      CONFIGURE_OVERRIDDEN_VARIABLES="$try_remove_var"
+
+      # Check if the provided tool contains a complete path.
+      tool_specified="$HG"
+      tool_basename="${tool_specified##*/}"
+      if test "x$tool_basename" = "x$tool_specified"; then
+        # A command without a complete path is provided, search $PATH.
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool HG=$tool_basename" >&5
+$as_echo "$as_me: Will search for user supplied tool HG=$tool_basename" >&6;}
+        # Extract the first word of "$tool_basename", so it can be a program name with args.
+set dummy $tool_basename; ac_word=$2
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 $as_echo_n "checking for $ac_word... " >&6; }
 if ${ac_cv_path_HG+:} false; then :
@@ -10433,8 +17720,154 @@
 fi
 
 
-  # Extract the first word of "stat", so it can be a program name with args.
-set dummy stat; ac_word=$2
+        if test "x$HG" = x; then
+          as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
+        fi
+      else
+        # Otherwise we believe it is a complete path. Use it as it is.
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool HG=$tool_specified" >&5
+$as_echo "$as_me: Will use user supplied tool HG=$tool_specified" >&6;}
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for HG" >&5
+$as_echo_n "checking for HG... " >&6; }
+        if test ! -x "$tool_specified"; then
+          { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
+$as_echo "not found" >&6; }
+          as_fn_error $? "User supplied tool HG=$tool_specified does not exist or is not executable" "$LINENO" 5
+        fi
+        { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
+$as_echo "$tool_specified" >&6; }
+      fi
+    fi
+  fi
+
+
+
+
+  # Publish this variable in the help.
+
+
+  if test "x$STAT" = x; then
+    # The variable is not set by user, try to locate tool using the code snippet
+    for ac_prog in stat
+do
+  # Extract the first word of "$ac_prog", so it can be a program name with args.
+set dummy $ac_prog; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_path_STAT+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $STAT in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_STAT="$STAT" # Let the user override the test with a path.
+  ;;
+  *)
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_path_STAT="$as_dir/$ac_word$ac_exec_ext"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+  ;;
+esac
+fi
+STAT=$ac_cv_path_STAT
+if test -n "$STAT"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $STAT" >&5
+$as_echo "$STAT" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+  test -n "$STAT" && break
+done
+
+  else
+    # The variable is set, but is it from the command line or the environment?
+
+    # Try to remove the string !STAT! from our list.
+    try_remove_var=${CONFIGURE_OVERRIDDEN_VARIABLES//!STAT!/}
+    if test "x$try_remove_var" = "x$CONFIGURE_OVERRIDDEN_VARIABLES"; then
+      # If it failed, the variable was not from the command line. Ignore it,
+      # but warn the user (except for BASH, which is always set by the calling BASH).
+      if test "xSTAT" != xBASH; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: Ignoring value of STAT from the environment. Use command line variables instead." >&5
+$as_echo "$as_me: WARNING: Ignoring value of STAT from the environment. Use command line variables instead." >&2;}
+      fi
+      # Try to locate tool using the code snippet
+      for ac_prog in stat
+do
+  # Extract the first word of "$ac_prog", so it can be a program name with args.
+set dummy $ac_prog; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_path_STAT+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $STAT in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_STAT="$STAT" # Let the user override the test with a path.
+  ;;
+  *)
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_path_STAT="$as_dir/$ac_word$ac_exec_ext"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+  ;;
+esac
+fi
+STAT=$ac_cv_path_STAT
+if test -n "$STAT"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $STAT" >&5
+$as_echo "$STAT" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+  test -n "$STAT" && break
+done
+
+    else
+      # If it succeeded, then it was overridden by the user. We will use it
+      # for the tool.
+
+      # First remove it from the list of overridden variables, so we can test
+      # for unknown variables in the end.
+      CONFIGURE_OVERRIDDEN_VARIABLES="$try_remove_var"
+
+      # Check if the provided tool contains a complete path.
+      tool_specified="$STAT"
+      tool_basename="${tool_specified##*/}"
+      if test "x$tool_basename" = "x$tool_specified"; then
+        # A command without a complete path is provided, search $PATH.
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool STAT=$tool_basename" >&5
+$as_echo "$as_me: Will search for user supplied tool STAT=$tool_basename" >&6;}
+        # Extract the first word of "$tool_basename", so it can be a program name with args.
+set dummy $tool_basename; ac_word=$2
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 $as_echo_n "checking for $ac_word... " >&6; }
 if ${ac_cv_path_STAT+:} false; then :
@@ -10473,8 +17906,38 @@
 fi
 
 
-  # Extract the first word of "time", so it can be a program name with args.
-set dummy time; ac_word=$2
+        if test "x$STAT" = x; then
+          as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
+        fi
+      else
+        # Otherwise we believe it is a complete path. Use it as it is.
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool STAT=$tool_specified" >&5
+$as_echo "$as_me: Will use user supplied tool STAT=$tool_specified" >&6;}
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for STAT" >&5
+$as_echo_n "checking for STAT... " >&6; }
+        if test ! -x "$tool_specified"; then
+          { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
+$as_echo "not found" >&6; }
+          as_fn_error $? "User supplied tool STAT=$tool_specified does not exist or is not executable" "$LINENO" 5
+        fi
+        { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
+$as_echo "$tool_specified" >&6; }
+      fi
+    fi
+  fi
+
+
+
+
+  # Publish this variable in the help.
+
+
+  if test "x$TIME" = x; then
+    # The variable is not set by user, try to locate tool using the code snippet
+    for ac_prog in time
+do
+  # Extract the first word of "$ac_prog", so it can be a program name with args.
+set dummy $ac_prog; ac_word=$2
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 $as_echo_n "checking for $ac_word... " >&6; }
 if ${ac_cv_path_TIME+:} false; then :
@@ -10513,6 +17976,143 @@
 fi
 
 
+  test -n "$TIME" && break
+done
+
+  else
+    # The variable is set, but is it from the command line or the environment?
+
+    # Try to remove the string !TIME! from our list.
+    try_remove_var=${CONFIGURE_OVERRIDDEN_VARIABLES//!TIME!/}
+    if test "x$try_remove_var" = "x$CONFIGURE_OVERRIDDEN_VARIABLES"; then
+      # If it failed, the variable was not from the command line. Ignore it,
+      # but warn the user (except for BASH, which is always set by the calling BASH).
+      if test "xTIME" != xBASH; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: Ignoring value of TIME from the environment. Use command line variables instead." >&5
+$as_echo "$as_me: WARNING: Ignoring value of TIME from the environment. Use command line variables instead." >&2;}
+      fi
+      # Try to locate tool using the code snippet
+      for ac_prog in time
+do
+  # Extract the first word of "$ac_prog", so it can be a program name with args.
+set dummy $ac_prog; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_path_TIME+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $TIME in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_TIME="$TIME" # Let the user override the test with a path.
+  ;;
+  *)
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_path_TIME="$as_dir/$ac_word$ac_exec_ext"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+  ;;
+esac
+fi
+TIME=$ac_cv_path_TIME
+if test -n "$TIME"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $TIME" >&5
+$as_echo "$TIME" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+  test -n "$TIME" && break
+done
+
+    else
+      # If it succeeded, then it was overridden by the user. We will use it
+      # for the tool.
+
+      # First remove it from the list of overridden variables, so we can test
+      # for unknown variables in the end.
+      CONFIGURE_OVERRIDDEN_VARIABLES="$try_remove_var"
+
+      # Check if the provided tool contains a complete path.
+      tool_specified="$TIME"
+      tool_basename="${tool_specified##*/}"
+      if test "x$tool_basename" = "x$tool_specified"; then
+        # A command without a complete path is provided, search $PATH.
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool TIME=$tool_basename" >&5
+$as_echo "$as_me: Will search for user supplied tool TIME=$tool_basename" >&6;}
+        # Extract the first word of "$tool_basename", so it can be a program name with args.
+set dummy $tool_basename; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_path_TIME+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $TIME in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_TIME="$TIME" # Let the user override the test with a path.
+  ;;
+  *)
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_path_TIME="$as_dir/$ac_word$ac_exec_ext"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+  ;;
+esac
+fi
+TIME=$ac_cv_path_TIME
+if test -n "$TIME"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $TIME" >&5
+$as_echo "$TIME" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+        if test "x$TIME" = x; then
+          as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
+        fi
+      else
+        # Otherwise we believe it is a complete path. Use it as it is.
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool TIME=$tool_specified" >&5
+$as_echo "$as_me: Will use user supplied tool TIME=$tool_specified" >&6;}
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for TIME" >&5
+$as_echo_n "checking for TIME... " >&6; }
+        if test ! -x "$tool_specified"; then
+          { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
+$as_echo "not found" >&6; }
+          as_fn_error $? "User supplied tool TIME=$tool_specified does not exist or is not executable" "$LINENO" 5
+        fi
+        { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
+$as_echo "$tool_specified" >&6; }
+      fi
+    fi
+  fi
+
+
   # Check if it's GNU time
   IS_GNU_TIME=`$TIME --version 2>&1 | $GREP 'GNU time'`
   if test "x$IS_GNU_TIME" != x; then
@@ -10524,7 +18124,14 @@
 
   if test "x$OPENJDK_TARGET_OS" = "xwindows"; then
 
-  for ac_prog in comm
+
+
+  # Publish this variable in the help.
+
+
+  if test "x$COMM" = x; then
+    # The variable is not set by user, try to locate tool using the code snippet
+    for ac_prog in comm
 do
   # Extract the first word of "$ac_prog", so it can be a program name with args.
 set dummy $ac_prog; ac_word=$2
@@ -10569,16 +18176,143 @@
   test -n "$COMM" && break
 done
 
+  else
+    # The variable is set, but is it from the command line or the environment?
+
+    # Try to remove the string !COMM! from our list.
+    try_remove_var=${CONFIGURE_OVERRIDDEN_VARIABLES//!COMM!/}
+    if test "x$try_remove_var" = "x$CONFIGURE_OVERRIDDEN_VARIABLES"; then
+      # If it failed, the variable was not from the command line. Ignore it,
+      # but warn the user (except for BASH, which is always set by the calling BASH).
+      if test "xCOMM" != xBASH; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: Ignoring value of COMM from the environment. Use command line variables instead." >&5
+$as_echo "$as_me: WARNING: Ignoring value of COMM from the environment. Use command line variables instead." >&2;}
+      fi
+      # Try to locate tool using the code snippet
+      for ac_prog in comm
+do
+  # Extract the first word of "$ac_prog", so it can be a program name with args.
+set dummy $ac_prog; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_path_COMM+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $COMM in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_COMM="$COMM" # Let the user override the test with a path.
+  ;;
+  *)
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_path_COMM="$as_dir/$ac_word$ac_exec_ext"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+  ;;
+esac
+fi
+COMM=$ac_cv_path_COMM
+if test -n "$COMM"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $COMM" >&5
+$as_echo "$COMM" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+  test -n "$COMM" && break
+done
+
+    else
+      # If it succeeded, then it was overridden by the user. We will use it
+      # for the tool.
+
+      # First remove it from the list of overridden variables, so we can test
+      # for unknown variables in the end.
+      CONFIGURE_OVERRIDDEN_VARIABLES="$try_remove_var"
+
+      # Check if the provided tool contains a complete path.
+      tool_specified="$COMM"
+      tool_basename="${tool_specified##*/}"
+      if test "x$tool_basename" = "x$tool_specified"; then
+        # A command without a complete path is provided, search $PATH.
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool COMM=$tool_basename" >&5
+$as_echo "$as_me: Will search for user supplied tool COMM=$tool_basename" >&6;}
+        # Extract the first word of "$tool_basename", so it can be a program name with args.
+set dummy $tool_basename; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_path_COMM+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $COMM in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_COMM="$COMM" # Let the user override the test with a path.
+  ;;
+  *)
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_path_COMM="$as_dir/$ac_word$ac_exec_ext"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+  ;;
+esac
+fi
+COMM=$ac_cv_path_COMM
+if test -n "$COMM"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $COMM" >&5
+$as_echo "$COMM" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+        if test "x$COMM" = x; then
+          as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
+        fi
+      else
+        # Otherwise we believe it is a complete path. Use it as it is.
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool COMM=$tool_specified" >&5
+$as_echo "$as_me: Will use user supplied tool COMM=$tool_specified" >&6;}
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for COMM" >&5
+$as_echo_n "checking for COMM... " >&6; }
+        if test ! -x "$tool_specified"; then
+          { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
+$as_echo "not found" >&6; }
+          as_fn_error $? "User supplied tool COMM=$tool_specified does not exist or is not executable" "$LINENO" 5
+        fi
+        { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
+$as_echo "$tool_specified" >&6; }
+      fi
+    fi
+  fi
+
+
 
   if test "x$COMM" = x; then
-    if test "xcomm" = x; then
-      PROG_NAME=comm
-    else
-      PROG_NAME=comm
-    fi
-    { $as_echo "$as_me:${as_lineno-$LINENO}: Could not find $PROG_NAME!" >&5
-$as_echo "$as_me: Could not find $PROG_NAME!" >&6;}
-    as_fn_error $? "Cannot continue" "$LINENO" 5
+    as_fn_error $? "Could not find required tool for COMM" "$LINENO" 5
   fi
 
 
@@ -10586,7 +18320,72 @@
 
   if test "x$OPENJDK_TARGET_OS" = "xmacosx"; then
 
-  for ac_prog in dsymutil
+
+
+  # Publish this variable in the help.
+
+
+  if test "x$DSYMUTIL" = x; then
+    # The variable is not set by user, try to locate tool using the code snippet
+    for ac_prog in dsymutil
+do
+  # Extract the first word of "$ac_prog", so it can be a program name with args.
+set dummy $ac_prog; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_path_DSYMUTIL+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $DSYMUTIL in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_DSYMUTIL="$DSYMUTIL" # Let the user override the test with a path.
+  ;;
+  *)
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_path_DSYMUTIL="$as_dir/$ac_word$ac_exec_ext"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+  ;;
+esac
+fi
+DSYMUTIL=$ac_cv_path_DSYMUTIL
+if test -n "$DSYMUTIL"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $DSYMUTIL" >&5
+$as_echo "$DSYMUTIL" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+  test -n "$DSYMUTIL" && break
+done
+
+  else
+    # The variable is set, but is it from the command line or the environment?
+
+    # Try to remove the string !DSYMUTIL! from our list.
+    try_remove_var=${CONFIGURE_OVERRIDDEN_VARIABLES//!DSYMUTIL!/}
+    if test "x$try_remove_var" = "x$CONFIGURE_OVERRIDDEN_VARIABLES"; then
+      # If it failed, the variable was not from the command line. Ignore it,
+      # but warn the user (except for BASH, which is always set by the calling BASH).
+      if test "xDSYMUTIL" != xBASH; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: Ignoring value of DSYMUTIL from the environment. Use command line variables instead." >&5
+$as_echo "$as_me: WARNING: Ignoring value of DSYMUTIL from the environment. Use command line variables instead." >&2;}
+      fi
+      # Try to locate tool using the code snippet
+      for ac_prog in dsymutil
 do
   # Extract the first word of "$ac_prog", so it can be a program name with args.
 set dummy $ac_prog; ac_word=$2
@@ -10631,21 +18430,155 @@
   test -n "$DSYMUTIL" && break
 done
 
+    else
+      # If it succeeded, then it was overridden by the user. We will use it
+      # for the tool.
+
+      # First remove it from the list of overridden variables, so we can test
+      # for unknown variables in the end.
+      CONFIGURE_OVERRIDDEN_VARIABLES="$try_remove_var"
+
+      # Check if the provided tool contains a complete path.
+      tool_specified="$DSYMUTIL"
+      tool_basename="${tool_specified##*/}"
+      if test "x$tool_basename" = "x$tool_specified"; then
+        # A command without a complete path is provided, search $PATH.
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool DSYMUTIL=$tool_basename" >&5
+$as_echo "$as_me: Will search for user supplied tool DSYMUTIL=$tool_basename" >&6;}
+        # Extract the first word of "$tool_basename", so it can be a program name with args.
+set dummy $tool_basename; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_path_DSYMUTIL+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $DSYMUTIL in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_DSYMUTIL="$DSYMUTIL" # Let the user override the test with a path.
+  ;;
+  *)
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_path_DSYMUTIL="$as_dir/$ac_word$ac_exec_ext"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+  ;;
+esac
+fi
+DSYMUTIL=$ac_cv_path_DSYMUTIL
+if test -n "$DSYMUTIL"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $DSYMUTIL" >&5
+$as_echo "$DSYMUTIL" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+        if test "x$DSYMUTIL" = x; then
+          as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
+        fi
+      else
+        # Otherwise we believe it is a complete path. Use it as it is.
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool DSYMUTIL=$tool_specified" >&5
+$as_echo "$as_me: Will use user supplied tool DSYMUTIL=$tool_specified" >&6;}
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for DSYMUTIL" >&5
+$as_echo_n "checking for DSYMUTIL... " >&6; }
+        if test ! -x "$tool_specified"; then
+          { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
+$as_echo "not found" >&6; }
+          as_fn_error $? "User supplied tool DSYMUTIL=$tool_specified does not exist or is not executable" "$LINENO" 5
+        fi
+        { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
+$as_echo "$tool_specified" >&6; }
+      fi
+    fi
+  fi
+
+
 
   if test "x$DSYMUTIL" = x; then
-    if test "xdsymutil" = x; then
-      PROG_NAME=dsymutil
-    else
-      PROG_NAME=dsymutil
-    fi
-    { $as_echo "$as_me:${as_lineno-$LINENO}: Could not find $PROG_NAME!" >&5
-$as_echo "$as_me: Could not find $PROG_NAME!" >&6;}
-    as_fn_error $? "Cannot continue" "$LINENO" 5
-  fi
-
-
-
-  for ac_prog in xattr
+    as_fn_error $? "Could not find required tool for DSYMUTIL" "$LINENO" 5
+  fi
+
+
+
+
+
+  # Publish this variable in the help.
+
+
+  if test "x$XATTR" = x; then
+    # The variable is not set by user, try to locate tool using the code snippet
+    for ac_prog in xattr
+do
+  # Extract the first word of "$ac_prog", so it can be a program name with args.
+set dummy $ac_prog; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_path_XATTR+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $XATTR in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_XATTR="$XATTR" # Let the user override the test with a path.
+  ;;
+  *)
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_path_XATTR="$as_dir/$ac_word$ac_exec_ext"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+  ;;
+esac
+fi
+XATTR=$ac_cv_path_XATTR
+if test -n "$XATTR"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $XATTR" >&5
+$as_echo "$XATTR" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+  test -n "$XATTR" && break
+done
+
+  else
+    # The variable is set, but is it from the command line or the environment?
+
+    # Try to remove the string !XATTR! from our list.
+    try_remove_var=${CONFIGURE_OVERRIDDEN_VARIABLES//!XATTR!/}
+    if test "x$try_remove_var" = "x$CONFIGURE_OVERRIDDEN_VARIABLES"; then
+      # If it failed, the variable was not from the command line. Ignore it,
+      # but warn the user (except for BASH, which is always set by the calling BASH).
+      if test "xXATTR" != xBASH; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: Ignoring value of XATTR from the environment. Use command line variables instead." >&5
+$as_echo "$as_me: WARNING: Ignoring value of XATTR from the environment. Use command line variables instead." >&2;}
+      fi
+      # Try to locate tool using the code snippet
+      for ac_prog in xattr
 do
   # Extract the first word of "$ac_prog", so it can be a program name with args.
 set dummy $ac_prog; ac_word=$2
@@ -10690,21 +18623,99 @@
   test -n "$XATTR" && break
 done
 
+    else
+      # If it succeeded, then it was overridden by the user. We will use it
+      # for the tool.
+
+      # First remove it from the list of overridden variables, so we can test
+      # for unknown variables in the end.
+      CONFIGURE_OVERRIDDEN_VARIABLES="$try_remove_var"
+
+      # Check if the provided tool contains a complete path.
+      tool_specified="$XATTR"
+      tool_basename="${tool_specified##*/}"
+      if test "x$tool_basename" = "x$tool_specified"; then
+        # A command without a complete path is provided, search $PATH.
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool XATTR=$tool_basename" >&5
+$as_echo "$as_me: Will search for user supplied tool XATTR=$tool_basename" >&6;}
+        # Extract the first word of "$tool_basename", so it can be a program name with args.
+set dummy $tool_basename; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_path_XATTR+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $XATTR in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_XATTR="$XATTR" # Let the user override the test with a path.
+  ;;
+  *)
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_path_XATTR="$as_dir/$ac_word$ac_exec_ext"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+  ;;
+esac
+fi
+XATTR=$ac_cv_path_XATTR
+if test -n "$XATTR"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $XATTR" >&5
+$as_echo "$XATTR" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+        if test "x$XATTR" = x; then
+          as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
+        fi
+      else
+        # Otherwise we believe it is a complete path. Use it as it is.
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool XATTR=$tool_specified" >&5
+$as_echo "$as_me: Will use user supplied tool XATTR=$tool_specified" >&6;}
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for XATTR" >&5
+$as_echo_n "checking for XATTR... " >&6; }
+        if test ! -x "$tool_specified"; then
+          { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
+$as_echo "not found" >&6; }
+          as_fn_error $? "User supplied tool XATTR=$tool_specified does not exist or is not executable" "$LINENO" 5
+        fi
+        { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
+$as_echo "$tool_specified" >&6; }
+      fi
+    fi
+  fi
+
+
 
   if test "x$XATTR" = x; then
-    if test "xxattr" = x; then
-      PROG_NAME=xattr
-    else
-      PROG_NAME=xattr
-    fi
-    { $as_echo "$as_me:${as_lineno-$LINENO}: Could not find $PROG_NAME!" >&5
-$as_echo "$as_me: Could not find $PROG_NAME!" >&6;}
-    as_fn_error $? "Cannot continue" "$LINENO" 5
-  fi
-
-
-    # Extract the first word of "codesign", so it can be a program name with args.
-set dummy codesign; ac_word=$2
+    as_fn_error $? "Could not find required tool for XATTR" "$LINENO" 5
+  fi
+
+
+
+
+  # Publish this variable in the help.
+
+
+  if test "x$CODESIGN" = x; then
+    # The variable is not set by user, try to locate tool using the code snippet
+    for ac_prog in codesign
+do
+  # Extract the first word of "$ac_prog", so it can be a program name with args.
+set dummy $ac_prog; ac_word=$2
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 $as_echo_n "checking for $ac_word... " >&6; }
 if ${ac_cv_path_CODESIGN+:} false; then :
@@ -10743,6 +18754,143 @@
 fi
 
 
+  test -n "$CODESIGN" && break
+done
+
+  else
+    # The variable is set, but is it from the command line or the environment?
+
+    # Try to remove the string !CODESIGN! from our list.
+    try_remove_var=${CONFIGURE_OVERRIDDEN_VARIABLES//!CODESIGN!/}
+    if test "x$try_remove_var" = "x$CONFIGURE_OVERRIDDEN_VARIABLES"; then
+      # If it failed, the variable was not from the command line. Ignore it,
+      # but warn the user (except for BASH, which is always set by the calling BASH).
+      if test "xCODESIGN" != xBASH; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: Ignoring value of CODESIGN from the environment. Use command line variables instead." >&5
+$as_echo "$as_me: WARNING: Ignoring value of CODESIGN from the environment. Use command line variables instead." >&2;}
+      fi
+      # Try to locate tool using the code snippet
+      for ac_prog in codesign
+do
+  # Extract the first word of "$ac_prog", so it can be a program name with args.
+set dummy $ac_prog; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_path_CODESIGN+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $CODESIGN in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_CODESIGN="$CODESIGN" # Let the user override the test with a path.
+  ;;
+  *)
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_path_CODESIGN="$as_dir/$ac_word$ac_exec_ext"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+  ;;
+esac
+fi
+CODESIGN=$ac_cv_path_CODESIGN
+if test -n "$CODESIGN"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $CODESIGN" >&5
+$as_echo "$CODESIGN" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+  test -n "$CODESIGN" && break
+done
+
+    else
+      # If it succeeded, then it was overridden by the user. We will use it
+      # for the tool.
+
+      # First remove it from the list of overridden variables, so we can test
+      # for unknown variables in the end.
+      CONFIGURE_OVERRIDDEN_VARIABLES="$try_remove_var"
+
+      # Check if the provided tool contains a complete path.
+      tool_specified="$CODESIGN"
+      tool_basename="${tool_specified##*/}"
+      if test "x$tool_basename" = "x$tool_specified"; then
+        # A command without a complete path is provided, search $PATH.
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool CODESIGN=$tool_basename" >&5
+$as_echo "$as_me: Will search for user supplied tool CODESIGN=$tool_basename" >&6;}
+        # Extract the first word of "$tool_basename", so it can be a program name with args.
+set dummy $tool_basename; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_path_CODESIGN+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $CODESIGN in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_CODESIGN="$CODESIGN" # Let the user override the test with a path.
+  ;;
+  *)
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_path_CODESIGN="$as_dir/$ac_word$ac_exec_ext"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+  ;;
+esac
+fi
+CODESIGN=$ac_cv_path_CODESIGN
+if test -n "$CODESIGN"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $CODESIGN" >&5
+$as_echo "$CODESIGN" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+        if test "x$CODESIGN" = x; then
+          as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
+        fi
+      else
+        # Otherwise we believe it is a complete path. Use it as it is.
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool CODESIGN=$tool_specified" >&5
+$as_echo "$as_me: Will use user supplied tool CODESIGN=$tool_specified" >&6;}
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for CODESIGN" >&5
+$as_echo_n "checking for CODESIGN... " >&6; }
+        if test ! -x "$tool_specified"; then
+          { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
+$as_echo "not found" >&6; }
+          as_fn_error $? "User supplied tool CODESIGN=$tool_specified does not exist or is not executable" "$LINENO" 5
+        fi
+        { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
+$as_echo "$tool_specified" >&6; }
+      fi
+    fi
+  fi
+
+
     if test "x$CODESIGN" != "x"; then
       # Verify that the openjdk_codesign certificate is present
       { $as_echo "$as_me:${as_lineno-$LINENO}: checking if openjdk_codesign certificate is present" >&5
@@ -16673,7 +24821,14 @@
     else
       # try to find jtreg on path
 
-  for ac_prog in jtreg
+
+
+  # Publish this variable in the help.
+
+
+  if test "x$JTREGEXE" = x; then
+    # The variable is not set by user, try to locate tool using the code snippet
+    for ac_prog in jtreg
 do
   # Extract the first word of "$ac_prog", so it can be a program name with args.
 set dummy $ac_prog; ac_word=$2
@@ -16718,16 +24873,143 @@
   test -n "$JTREGEXE" && break
 done
 
+  else
+    # The variable is set, but is it from the command line or the environment?
+
+    # Try to remove the string !JTREGEXE! from our list.
+    try_remove_var=${CONFIGURE_OVERRIDDEN_VARIABLES//!JTREGEXE!/}
+    if test "x$try_remove_var" = "x$CONFIGURE_OVERRIDDEN_VARIABLES"; then
+      # If it failed, the variable was not from the command line. Ignore it,
+      # but warn the user (except for BASH, which is always set by the calling BASH).
+      if test "xJTREGEXE" != xBASH; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: Ignoring value of JTREGEXE from the environment. Use command line variables instead." >&5
+$as_echo "$as_me: WARNING: Ignoring value of JTREGEXE from the environment. Use command line variables instead." >&2;}
+      fi
+      # Try to locate tool using the code snippet
+      for ac_prog in jtreg
+do
+  # Extract the first word of "$ac_prog", so it can be a program name with args.
+set dummy $ac_prog; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_path_JTREGEXE+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $JTREGEXE in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_JTREGEXE="$JTREGEXE" # Let the user override the test with a path.
+  ;;
+  *)
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_path_JTREGEXE="$as_dir/$ac_word$ac_exec_ext"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+  ;;
+esac
+fi
+JTREGEXE=$ac_cv_path_JTREGEXE
+if test -n "$JTREGEXE"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $JTREGEXE" >&5
+$as_echo "$JTREGEXE" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+  test -n "$JTREGEXE" && break
+done
+
+    else
+      # If it succeeded, then it was overridden by the user. We will use it
+      # for the tool.
+
+      # First remove it from the list of overridden variables, so we can test
+      # for unknown variables in the end.
+      CONFIGURE_OVERRIDDEN_VARIABLES="$try_remove_var"
+
+      # Check if the provided tool contains a complete path.
+      tool_specified="$JTREGEXE"
+      tool_basename="${tool_specified##*/}"
+      if test "x$tool_basename" = "x$tool_specified"; then
+        # A command without a complete path is provided, search $PATH.
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool JTREGEXE=$tool_basename" >&5
+$as_echo "$as_me: Will search for user supplied tool JTREGEXE=$tool_basename" >&6;}
+        # Extract the first word of "$tool_basename", so it can be a program name with args.
+set dummy $tool_basename; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_path_JTREGEXE+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $JTREGEXE in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_JTREGEXE="$JTREGEXE" # Let the user override the test with a path.
+  ;;
+  *)
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_path_JTREGEXE="$as_dir/$ac_word$ac_exec_ext"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+  ;;
+esac
+fi
+JTREGEXE=$ac_cv_path_JTREGEXE
+if test -n "$JTREGEXE"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $JTREGEXE" >&5
+$as_echo "$JTREGEXE" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+        if test "x$JTREGEXE" = x; then
+          as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
+        fi
+      else
+        # Otherwise we believe it is a complete path. Use it as it is.
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool JTREGEXE=$tool_specified" >&5
+$as_echo "$as_me: Will use user supplied tool JTREGEXE=$tool_specified" >&6;}
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for JTREGEXE" >&5
+$as_echo_n "checking for JTREGEXE... " >&6; }
+        if test ! -x "$tool_specified"; then
+          { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
+$as_echo "not found" >&6; }
+          as_fn_error $? "User supplied tool JTREGEXE=$tool_specified does not exist or is not executable" "$LINENO" 5
+        fi
+        { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
+$as_echo "$tool_specified" >&6; }
+      fi
+    fi
+  fi
+
+
 
   if test "x$JTREGEXE" = x; then
-    if test "xjtreg" = x; then
-      PROG_NAME=jtregexe
-    else
-      PROG_NAME=jtreg
-    fi
-    { $as_echo "$as_me:${as_lineno-$LINENO}: Could not find $PROG_NAME!" >&5
-$as_echo "$as_me: Could not find $PROG_NAME!" >&6;}
-    as_fn_error $? "Cannot continue" "$LINENO" 5
+    as_fn_error $? "Could not find required tool for JTREGEXE" "$LINENO" 5
   fi
 
 
@@ -18016,6 +26298,13 @@
     # otherwise we might pick up cross-compilers which don't use standard naming.
     # Otherwise, we'll set the BUILD_tools to the native tools, but that'll have
     # to wait until they are properly discovered.
+
+
+  # Publish this variable in the help.
+
+
+  if test "x$BUILD_CC" = x; then
+    # The variable is not set by user, try to locate tool using the code snippet
     for ac_prog in cl cc gcc
 do
   # Extract the first word of "$ac_prog", so it can be a program name with args.
@@ -18061,6 +26350,140 @@
   test -n "$BUILD_CC" && break
 done
 
+  else
+    # The variable is set, but is it from the command line or the environment?
+
+    # Try to remove the string !BUILD_CC! from our list.
+    try_remove_var=${CONFIGURE_OVERRIDDEN_VARIABLES//!BUILD_CC!/}
+    if test "x$try_remove_var" = "x$CONFIGURE_OVERRIDDEN_VARIABLES"; then
+      # If it failed, the variable was not from the command line. Ignore it,
+      # but warn the user (except for BASH, which is always set by the calling BASH).
+      if test "xBUILD_CC" != xBASH; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: Ignoring value of BUILD_CC from the environment. Use command line variables instead." >&5
+$as_echo "$as_me: WARNING: Ignoring value of BUILD_CC from the environment. Use command line variables instead." >&2;}
+      fi
+      # Try to locate tool using the code snippet
+      for ac_prog in cl cc gcc
+do
+  # Extract the first word of "$ac_prog", so it can be a program name with args.
+set dummy $ac_prog; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_path_BUILD_CC+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $BUILD_CC in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_BUILD_CC="$BUILD_CC" # Let the user override the test with a path.
+  ;;
+  *)
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_path_BUILD_CC="$as_dir/$ac_word$ac_exec_ext"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+  ;;
+esac
+fi
+BUILD_CC=$ac_cv_path_BUILD_CC
+if test -n "$BUILD_CC"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $BUILD_CC" >&5
+$as_echo "$BUILD_CC" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+  test -n "$BUILD_CC" && break
+done
+
+    else
+      # If it succeeded, then it was overridden by the user. We will use it
+      # for the tool.
+
+      # First remove it from the list of overridden variables, so we can test
+      # for unknown variables in the end.
+      CONFIGURE_OVERRIDDEN_VARIABLES="$try_remove_var"
+
+      # Check if the provided tool contains a complete path.
+      tool_specified="$BUILD_CC"
+      tool_basename="${tool_specified##*/}"
+      if test "x$tool_basename" = "x$tool_specified"; then
+        # A command without a complete path is provided, search $PATH.
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool BUILD_CC=$tool_basename" >&5
+$as_echo "$as_me: Will search for user supplied tool BUILD_CC=$tool_basename" >&6;}
+        # Extract the first word of "$tool_basename", so it can be a program name with args.
+set dummy $tool_basename; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_path_BUILD_CC+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $BUILD_CC in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_BUILD_CC="$BUILD_CC" # Let the user override the test with a path.
+  ;;
+  *)
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_path_BUILD_CC="$as_dir/$ac_word$ac_exec_ext"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+  ;;
+esac
+fi
+BUILD_CC=$ac_cv_path_BUILD_CC
+if test -n "$BUILD_CC"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $BUILD_CC" >&5
+$as_echo "$BUILD_CC" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+        if test "x$BUILD_CC" = x; then
+          as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
+        fi
+      else
+        # Otherwise we believe it is a complete path. Use it as it is.
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool BUILD_CC=$tool_specified" >&5
+$as_echo "$as_me: Will use user supplied tool BUILD_CC=$tool_specified" >&6;}
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for BUILD_CC" >&5
+$as_echo_n "checking for BUILD_CC... " >&6; }
+        if test ! -x "$tool_specified"; then
+          { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
+$as_echo "not found" >&6; }
+          as_fn_error $? "User supplied tool BUILD_CC=$tool_specified does not exist or is not executable" "$LINENO" 5
+        fi
+        { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
+$as_echo "$tool_specified" >&6; }
+      fi
+    fi
+  fi
+
+
 
   if test "x$OPENJDK_BUILD_OS_ENV" = "xwindows.cygwin"; then
 
@@ -18327,6 +26750,13 @@
 $as_echo "$as_me: Rewriting BUILD_CC to \"$new_complete\"" >&6;}
   fi
 
+
+
+  # Publish this variable in the help.
+
+
+  if test "x$BUILD_CXX" = x; then
+    # The variable is not set by user, try to locate tool using the code snippet
     for ac_prog in cl CC g++
 do
   # Extract the first word of "$ac_prog", so it can be a program name with args.
@@ -18372,6 +26802,140 @@
   test -n "$BUILD_CXX" && break
 done
 
+  else
+    # The variable is set, but is it from the command line or the environment?
+
+    # Try to remove the string !BUILD_CXX! from our list.
+    try_remove_var=${CONFIGURE_OVERRIDDEN_VARIABLES//!BUILD_CXX!/}
+    if test "x$try_remove_var" = "x$CONFIGURE_OVERRIDDEN_VARIABLES"; then
+      # If it failed, the variable was not from the command line. Ignore it,
+      # but warn the user (except for BASH, which is always set by the calling BASH).
+      if test "xBUILD_CXX" != xBASH; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: Ignoring value of BUILD_CXX from the environment. Use command line variables instead." >&5
+$as_echo "$as_me: WARNING: Ignoring value of BUILD_CXX from the environment. Use command line variables instead." >&2;}
+      fi
+      # Try to locate tool using the code snippet
+      for ac_prog in cl CC g++
+do
+  # Extract the first word of "$ac_prog", so it can be a program name with args.
+set dummy $ac_prog; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_path_BUILD_CXX+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $BUILD_CXX in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_BUILD_CXX="$BUILD_CXX" # Let the user override the test with a path.
+  ;;
+  *)
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_path_BUILD_CXX="$as_dir/$ac_word$ac_exec_ext"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+  ;;
+esac
+fi
+BUILD_CXX=$ac_cv_path_BUILD_CXX
+if test -n "$BUILD_CXX"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $BUILD_CXX" >&5
+$as_echo "$BUILD_CXX" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+  test -n "$BUILD_CXX" && break
+done
+
+    else
+      # If it succeeded, then it was overridden by the user. We will use it
+      # for the tool.
+
+      # First remove it from the list of overridden variables, so we can test
+      # for unknown variables in the end.
+      CONFIGURE_OVERRIDDEN_VARIABLES="$try_remove_var"
+
+      # Check if the provided tool contains a complete path.
+      tool_specified="$BUILD_CXX"
+      tool_basename="${tool_specified##*/}"
+      if test "x$tool_basename" = "x$tool_specified"; then
+        # A command without a complete path is provided, search $PATH.
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool BUILD_CXX=$tool_basename" >&5
+$as_echo "$as_me: Will search for user supplied tool BUILD_CXX=$tool_basename" >&6;}
+        # Extract the first word of "$tool_basename", so it can be a program name with args.
+set dummy $tool_basename; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_path_BUILD_CXX+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $BUILD_CXX in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_BUILD_CXX="$BUILD_CXX" # Let the user override the test with a path.
+  ;;
+  *)
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_path_BUILD_CXX="$as_dir/$ac_word$ac_exec_ext"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+  ;;
+esac
+fi
+BUILD_CXX=$ac_cv_path_BUILD_CXX
+if test -n "$BUILD_CXX"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $BUILD_CXX" >&5
+$as_echo "$BUILD_CXX" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+        if test "x$BUILD_CXX" = x; then
+          as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
+        fi
+      else
+        # Otherwise we believe it is a complete path. Use it as it is.
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool BUILD_CXX=$tool_specified" >&5
+$as_echo "$as_me: Will use user supplied tool BUILD_CXX=$tool_specified" >&6;}
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for BUILD_CXX" >&5
+$as_echo_n "checking for BUILD_CXX... " >&6; }
+        if test ! -x "$tool_specified"; then
+          { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
+$as_echo "not found" >&6; }
+          as_fn_error $? "User supplied tool BUILD_CXX=$tool_specified does not exist or is not executable" "$LINENO" 5
+        fi
+        { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
+$as_echo "$tool_specified" >&6; }
+      fi
+    fi
+  fi
+
+
 
   if test "x$OPENJDK_BUILD_OS_ENV" = "xwindows.cygwin"; then
 
@@ -18638,8 +27202,17 @@
 $as_echo "$as_me: Rewriting BUILD_CXX to \"$new_complete\"" >&6;}
   fi
 
-    # Extract the first word of "ld", so it can be a program name with args.
-set dummy ld; ac_word=$2
+
+
+  # Publish this variable in the help.
+
+
+  if test "x$BUILD_LD" = x; then
+    # The variable is not set by user, try to locate tool using the code snippet
+    for ac_prog in ld
+do
+  # Extract the first word of "$ac_prog", so it can be a program name with args.
+set dummy $ac_prog; ac_word=$2
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 $as_echo_n "checking for $ac_word... " >&6; }
 if ${ac_cv_path_BUILD_LD+:} false; then :
@@ -18678,6 +27251,143 @@
 fi
 
 
+  test -n "$BUILD_LD" && break
+done
+
+  else
+    # The variable is set, but is it from the command line or the environment?
+
+    # Try to remove the string !BUILD_LD! from our list.
+    try_remove_var=${CONFIGURE_OVERRIDDEN_VARIABLES//!BUILD_LD!/}
+    if test "x$try_remove_var" = "x$CONFIGURE_OVERRIDDEN_VARIABLES"; then
+      # If it failed, the variable was not from the command line. Ignore it,
+      # but warn the user (except for BASH, which is always set by the calling BASH).
+      if test "xBUILD_LD" != xBASH; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: Ignoring value of BUILD_LD from the environment. Use command line variables instead." >&5
+$as_echo "$as_me: WARNING: Ignoring value of BUILD_LD from the environment. Use command line variables instead." >&2;}
+      fi
+      # Try to locate tool using the code snippet
+      for ac_prog in ld
+do
+  # Extract the first word of "$ac_prog", so it can be a program name with args.
+set dummy $ac_prog; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_path_BUILD_LD+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $BUILD_LD in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_BUILD_LD="$BUILD_LD" # Let the user override the test with a path.
+  ;;
+  *)
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_path_BUILD_LD="$as_dir/$ac_word$ac_exec_ext"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+  ;;
+esac
+fi
+BUILD_LD=$ac_cv_path_BUILD_LD
+if test -n "$BUILD_LD"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $BUILD_LD" >&5
+$as_echo "$BUILD_LD" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+  test -n "$BUILD_LD" && break
+done
+
+    else
+      # If it succeeded, then it was overridden by the user. We will use it
+      # for the tool.
+
+      # First remove it from the list of overridden variables, so we can test
+      # for unknown variables in the end.
+      CONFIGURE_OVERRIDDEN_VARIABLES="$try_remove_var"
+
+      # Check if the provided tool contains a complete path.
+      tool_specified="$BUILD_LD"
+      tool_basename="${tool_specified##*/}"
+      if test "x$tool_basename" = "x$tool_specified"; then
+        # A command without a complete path is provided, search $PATH.
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool BUILD_LD=$tool_basename" >&5
+$as_echo "$as_me: Will search for user supplied tool BUILD_LD=$tool_basename" >&6;}
+        # Extract the first word of "$tool_basename", so it can be a program name with args.
+set dummy $tool_basename; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_path_BUILD_LD+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $BUILD_LD in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_BUILD_LD="$BUILD_LD" # Let the user override the test with a path.
+  ;;
+  *)
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_path_BUILD_LD="$as_dir/$ac_word$ac_exec_ext"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+  ;;
+esac
+fi
+BUILD_LD=$ac_cv_path_BUILD_LD
+if test -n "$BUILD_LD"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $BUILD_LD" >&5
+$as_echo "$BUILD_LD" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+        if test "x$BUILD_LD" = x; then
+          as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
+        fi
+      else
+        # Otherwise we believe it is a complete path. Use it as it is.
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool BUILD_LD=$tool_specified" >&5
+$as_echo "$as_me: Will use user supplied tool BUILD_LD=$tool_specified" >&6;}
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for BUILD_LD" >&5
+$as_echo_n "checking for BUILD_LD... " >&6; }
+        if test ! -x "$tool_specified"; then
+          { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
+$as_echo "not found" >&6; }
+          as_fn_error $? "User supplied tool BUILD_LD=$tool_specified does not exist or is not executable" "$LINENO" 5
+        fi
+        { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
+$as_echo "$tool_specified" >&6; }
+      fi
+    fi
+  fi
+
+
 
   if test "x$OPENJDK_BUILD_OS_ENV" = "xwindows.cygwin"; then
 
@@ -22654,9 +31364,18 @@
 
 
   if test "x$OPENJDK_TARGET_OS" != xwindows; then
+
+
+  # Publish this variable in the help.
+
+
+  if test "x$AR" = x; then
+    # The variable is not set by user, try to locate tool using the code snippet
     if test -n "$ac_tool_prefix"; then
-  # Extract the first word of "${ac_tool_prefix}ar", so it can be a program name with args.
-set dummy ${ac_tool_prefix}ar; ac_word=$2
+  for ac_prog in ar
+  do
+    # Extract the first word of "$ac_tool_prefix$ac_prog", so it can be a program name with args.
+set dummy $ac_tool_prefix$ac_prog; ac_word=$2
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 $as_echo_n "checking for $ac_word... " >&6; }
 if ${ac_cv_prog_AR+:} false; then :
@@ -22672,7 +31391,7 @@
   test -z "$as_dir" && as_dir=.
     for ac_exec_ext in '' $ac_executable_extensions; do
   if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
-    ac_cv_prog_AR="${ac_tool_prefix}ar"
+    ac_cv_prog_AR="$ac_tool_prefix$ac_prog"
     $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
     break 2
   fi
@@ -22692,11 +31411,15 @@
 fi
 
 
-fi
-if test -z "$ac_cv_prog_AR"; then
+    test -n "$AR" && break
+  done
+fi
+if test -z "$AR"; then
   ac_ct_AR=$AR
-  # Extract the first word of "ar", so it can be a program name with args.
-set dummy ar; ac_word=$2
+  for ac_prog in ar
+do
+  # Extract the first word of "$ac_prog", so it can be a program name with args.
+set dummy $ac_prog; ac_word=$2
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 $as_echo_n "checking for $ac_word... " >&6; }
 if ${ac_cv_prog_ac_ct_AR+:} false; then :
@@ -22712,7 +31435,7 @@
   test -z "$as_dir" && as_dir=.
     for ac_exec_ext in '' $ac_executable_extensions; do
   if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
-    ac_cv_prog_ac_ct_AR="ar"
+    ac_cv_prog_ac_ct_AR="$ac_prog"
     $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
     break 2
   fi
@@ -22731,6 +31454,10 @@
 $as_echo "no" >&6; }
 fi
 
+
+  test -n "$ac_ct_AR" && break
+done
+
   if test "x$ac_ct_AR" = x; then
     AR=""
   else
@@ -22742,9 +31469,196 @@
 esac
     AR=$ac_ct_AR
   fi
-else
-  AR="$ac_cv_prog_AR"
-fi
+fi
+
+  else
+    # The variable is set, but is it from the command line or the environment?
+
+    # Try to remove the string !AR! from our list.
+    try_remove_var=${CONFIGURE_OVERRIDDEN_VARIABLES//!AR!/}
+    if test "x$try_remove_var" = "x$CONFIGURE_OVERRIDDEN_VARIABLES"; then
+      # If it failed, the variable was not from the command line. Ignore it,
+      # but warn the user (except for BASH, which is always set by the calling BASH).
+      if test "xAR" != xBASH; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: Ignoring value of AR from the environment. Use command line variables instead." >&5
+$as_echo "$as_me: WARNING: Ignoring value of AR from the environment. Use command line variables instead." >&2;}
+      fi
+      # Try to locate tool using the code snippet
+      if test -n "$ac_tool_prefix"; then
+  for ac_prog in ar
+  do
+    # Extract the first word of "$ac_tool_prefix$ac_prog", so it can be a program name with args.
+set dummy $ac_tool_prefix$ac_prog; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_prog_AR+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  if test -n "$AR"; then
+  ac_cv_prog_AR="$AR" # Let the user override the test.
+else
+as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_prog_AR="$ac_tool_prefix$ac_prog"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+fi
+fi
+AR=$ac_cv_prog_AR
+if test -n "$AR"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $AR" >&5
+$as_echo "$AR" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+    test -n "$AR" && break
+  done
+fi
+if test -z "$AR"; then
+  ac_ct_AR=$AR
+  for ac_prog in ar
+do
+  # Extract the first word of "$ac_prog", so it can be a program name with args.
+set dummy $ac_prog; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_prog_ac_ct_AR+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  if test -n "$ac_ct_AR"; then
+  ac_cv_prog_ac_ct_AR="$ac_ct_AR" # Let the user override the test.
+else
+as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_prog_ac_ct_AR="$ac_prog"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+fi
+fi
+ac_ct_AR=$ac_cv_prog_ac_ct_AR
+if test -n "$ac_ct_AR"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_ct_AR" >&5
+$as_echo "$ac_ct_AR" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+  test -n "$ac_ct_AR" && break
+done
+
+  if test "x$ac_ct_AR" = x; then
+    AR=""
+  else
+    case $cross_compiling:$ac_tool_warned in
+yes:)
+{ $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5
+$as_echo "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;}
+ac_tool_warned=yes ;;
+esac
+    AR=$ac_ct_AR
+  fi
+fi
+
+    else
+      # If it succeeded, then it was overridden by the user. We will use it
+      # for the tool.
+
+      # First remove it from the list of overridden variables, so we can test
+      # for unknown variables in the end.
+      CONFIGURE_OVERRIDDEN_VARIABLES="$try_remove_var"
+
+      # Check if the provided tool contains a complete path.
+      tool_specified="$AR"
+      tool_basename="${tool_specified##*/}"
+      if test "x$tool_basename" = "x$tool_specified"; then
+        # A command without a complete path is provided, search $PATH.
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool AR=$tool_basename" >&5
+$as_echo "$as_me: Will search for user supplied tool AR=$tool_basename" >&6;}
+        # Extract the first word of "$tool_basename", so it can be a program name with args.
+set dummy $tool_basename; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_path_AR+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $AR in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_AR="$AR" # Let the user override the test with a path.
+  ;;
+  *)
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_path_AR="$as_dir/$ac_word$ac_exec_ext"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+  ;;
+esac
+fi
+AR=$ac_cv_path_AR
+if test -n "$AR"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $AR" >&5
+$as_echo "$AR" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+        if test "x$AR" = x; then
+          as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
+        fi
+      else
+        # Otherwise we believe it is a complete path. Use it as it is.
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool AR=$tool_specified" >&5
+$as_echo "$as_me: Will use user supplied tool AR=$tool_specified" >&6;}
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for AR" >&5
+$as_echo_n "checking for AR... " >&6; }
+        if test ! -x "$tool_specified"; then
+          { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
+$as_echo "not found" >&6; }
+          as_fn_error $? "User supplied tool AR=$tool_specified does not exist or is not executable" "$LINENO" 5
+        fi
+        { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
+$as_echo "$tool_specified" >&6; }
+      fi
+    fi
+  fi
+
 
 
   if test "x$OPENJDK_BUILD_OS_ENV" = "xwindows.cygwin"; then
@@ -25534,8 +34448,17 @@
 
   # Find the right assembler.
   if test "x$OPENJDK_TARGET_OS" = xsolaris; then
-    # Extract the first word of "as", so it can be a program name with args.
-set dummy as; ac_word=$2
+
+
+  # Publish this variable in the help.
+
+
+  if test "x$AS" = x; then
+    # The variable is not set by user, try to locate tool using the code snippet
+    for ac_prog in as
+do
+  # Extract the first word of "$ac_prog", so it can be a program name with args.
+set dummy $ac_prog; ac_word=$2
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 $as_echo_n "checking for $ac_word... " >&6; }
 if ${ac_cv_path_AS+:} false; then :
@@ -25574,6 +34497,143 @@
 fi
 
 
+  test -n "$AS" && break
+done
+
+  else
+    # The variable is set, but is it from the command line or the environment?
+
+    # Try to remove the string !AS! from our list.
+    try_remove_var=${CONFIGURE_OVERRIDDEN_VARIABLES//!AS!/}
+    if test "x$try_remove_var" = "x$CONFIGURE_OVERRIDDEN_VARIABLES"; then
+      # If it failed, the variable was not from the command line. Ignore it,
+      # but warn the user (except for BASH, which is always set by the calling BASH).
+      if test "xAS" != xBASH; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: Ignoring value of AS from the environment. Use command line variables instead." >&5
+$as_echo "$as_me: WARNING: Ignoring value of AS from the environment. Use command line variables instead." >&2;}
+      fi
+      # Try to locate tool using the code snippet
+      for ac_prog in as
+do
+  # Extract the first word of "$ac_prog", so it can be a program name with args.
+set dummy $ac_prog; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_path_AS+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $AS in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_AS="$AS" # Let the user override the test with a path.
+  ;;
+  *)
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_path_AS="$as_dir/$ac_word$ac_exec_ext"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+  ;;
+esac
+fi
+AS=$ac_cv_path_AS
+if test -n "$AS"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $AS" >&5
+$as_echo "$AS" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+  test -n "$AS" && break
+done
+
+    else
+      # If it succeeded, then it was overridden by the user. We will use it
+      # for the tool.
+
+      # First remove it from the list of overridden variables, so we can test
+      # for unknown variables in the end.
+      CONFIGURE_OVERRIDDEN_VARIABLES="$try_remove_var"
+
+      # Check if the provided tool contains a complete path.
+      tool_specified="$AS"
+      tool_basename="${tool_specified##*/}"
+      if test "x$tool_basename" = "x$tool_specified"; then
+        # A command without a complete path is provided, search $PATH.
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool AS=$tool_basename" >&5
+$as_echo "$as_me: Will search for user supplied tool AS=$tool_basename" >&6;}
+        # Extract the first word of "$tool_basename", so it can be a program name with args.
+set dummy $tool_basename; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_path_AS+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $AS in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_AS="$AS" # Let the user override the test with a path.
+  ;;
+  *)
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_path_AS="$as_dir/$ac_word$ac_exec_ext"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+  ;;
+esac
+fi
+AS=$ac_cv_path_AS
+if test -n "$AS"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $AS" >&5
+$as_echo "$AS" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+        if test "x$AS" = x; then
+          as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
+        fi
+      else
+        # Otherwise we believe it is a complete path. Use it as it is.
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool AS=$tool_specified" >&5
+$as_echo "$as_me: Will use user supplied tool AS=$tool_specified" >&6;}
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for AS" >&5
+$as_echo_n "checking for AS... " >&6; }
+        if test ! -x "$tool_specified"; then
+          { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
+$as_echo "not found" >&6; }
+          as_fn_error $? "User supplied tool AS=$tool_specified does not exist or is not executable" "$LINENO" 5
+        fi
+        { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
+$as_echo "$tool_specified" >&6; }
+      fi
+    fi
+  fi
+
+
 
   if test "x$OPENJDK_BUILD_OS_ENV" = "xwindows.cygwin"; then
 
@@ -25846,8 +34906,17 @@
 
 
   if test "x$OPENJDK_TARGET_OS" = xsolaris; then
-    # Extract the first word of "nm", so it can be a program name with args.
-set dummy nm; ac_word=$2
+
+
+  # Publish this variable in the help.
+
+
+  if test "x$NM" = x; then
+    # The variable is not set by user, try to locate tool using the code snippet
+    for ac_prog in nm
+do
+  # Extract the first word of "$ac_prog", so it can be a program name with args.
+set dummy $ac_prog; ac_word=$2
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 $as_echo_n "checking for $ac_word... " >&6; }
 if ${ac_cv_path_NM+:} false; then :
@@ -25886,6 +34955,143 @@
 fi
 
 
+  test -n "$NM" && break
+done
+
+  else
+    # The variable is set, but is it from the command line or the environment?
+
+    # Try to remove the string !NM! from our list.
+    try_remove_var=${CONFIGURE_OVERRIDDEN_VARIABLES//!NM!/}
+    if test "x$try_remove_var" = "x$CONFIGURE_OVERRIDDEN_VARIABLES"; then
+      # If it failed, the variable was not from the command line. Ignore it,
+      # but warn the user (except for BASH, which is always set by the calling BASH).
+      if test "xNM" != xBASH; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: Ignoring value of NM from the environment. Use command line variables instead." >&5
+$as_echo "$as_me: WARNING: Ignoring value of NM from the environment. Use command line variables instead." >&2;}
+      fi
+      # Try to locate tool using the code snippet
+      for ac_prog in nm
+do
+  # Extract the first word of "$ac_prog", so it can be a program name with args.
+set dummy $ac_prog; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_path_NM+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $NM in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_NM="$NM" # Let the user override the test with a path.
+  ;;
+  *)
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_path_NM="$as_dir/$ac_word$ac_exec_ext"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+  ;;
+esac
+fi
+NM=$ac_cv_path_NM
+if test -n "$NM"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $NM" >&5
+$as_echo "$NM" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+  test -n "$NM" && break
+done
+
+    else
+      # If it succeeded, then it was overridden by the user. We will use it
+      # for the tool.
+
+      # First remove it from the list of overridden variables, so we can test
+      # for unknown variables in the end.
+      CONFIGURE_OVERRIDDEN_VARIABLES="$try_remove_var"
+
+      # Check if the provided tool contains a complete path.
+      tool_specified="$NM"
+      tool_basename="${tool_specified##*/}"
+      if test "x$tool_basename" = "x$tool_specified"; then
+        # A command without a complete path is provided, search $PATH.
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool NM=$tool_basename" >&5
+$as_echo "$as_me: Will search for user supplied tool NM=$tool_basename" >&6;}
+        # Extract the first word of "$tool_basename", so it can be a program name with args.
+set dummy $tool_basename; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_path_NM+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $NM in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_NM="$NM" # Let the user override the test with a path.
+  ;;
+  *)
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_path_NM="$as_dir/$ac_word$ac_exec_ext"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+  ;;
+esac
+fi
+NM=$ac_cv_path_NM
+if test -n "$NM"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $NM" >&5
+$as_echo "$NM" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+        if test "x$NM" = x; then
+          as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
+        fi
+      else
+        # Otherwise we believe it is a complete path. Use it as it is.
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool NM=$tool_specified" >&5
+$as_echo "$as_me: Will use user supplied tool NM=$tool_specified" >&6;}
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for NM" >&5
+$as_echo_n "checking for NM... " >&6; }
+        if test ! -x "$tool_specified"; then
+          { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
+$as_echo "not found" >&6; }
+          as_fn_error $? "User supplied tool NM=$tool_specified does not exist or is not executable" "$LINENO" 5
+        fi
+        { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
+$as_echo "$tool_specified" >&6; }
+      fi
+    fi
+  fi
+
+
 
   if test "x$OPENJDK_BUILD_OS_ENV" = "xwindows.cygwin"; then
 
@@ -26152,8 +35358,17 @@
 $as_echo "$as_me: Rewriting NM to \"$new_complete\"" >&6;}
   fi
 
-    # Extract the first word of "gnm", so it can be a program name with args.
-set dummy gnm; ac_word=$2
+
+
+  # Publish this variable in the help.
+
+
+  if test "x$GNM" = x; then
+    # The variable is not set by user, try to locate tool using the code snippet
+    for ac_prog in gnm
+do
+  # Extract the first word of "$ac_prog", so it can be a program name with args.
+set dummy $ac_prog; ac_word=$2
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 $as_echo_n "checking for $ac_word... " >&6; }
 if ${ac_cv_path_GNM+:} false; then :
@@ -26192,6 +35407,143 @@
 fi
 
 
+  test -n "$GNM" && break
+done
+
+  else
+    # The variable is set, but is it from the command line or the environment?
+
+    # Try to remove the string !GNM! from our list.
+    try_remove_var=${CONFIGURE_OVERRIDDEN_VARIABLES//!GNM!/}
+    if test "x$try_remove_var" = "x$CONFIGURE_OVERRIDDEN_VARIABLES"; then
+      # If it failed, the variable was not from the command line. Ignore it,
+      # but warn the user (except for BASH, which is always set by the calling BASH).
+      if test "xGNM" != xBASH; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: Ignoring value of GNM from the environment. Use command line variables instead." >&5
+$as_echo "$as_me: WARNING: Ignoring value of GNM from the environment. Use command line variables instead." >&2;}
+      fi
+      # Try to locate tool using the code snippet
+      for ac_prog in gnm
+do
+  # Extract the first word of "$ac_prog", so it can be a program name with args.
+set dummy $ac_prog; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_path_GNM+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $GNM in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_GNM="$GNM" # Let the user override the test with a path.
+  ;;
+  *)
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_path_GNM="$as_dir/$ac_word$ac_exec_ext"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+  ;;
+esac
+fi
+GNM=$ac_cv_path_GNM
+if test -n "$GNM"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $GNM" >&5
+$as_echo "$GNM" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+  test -n "$GNM" && break
+done
+
+    else
+      # If it succeeded, then it was overridden by the user. We will use it
+      # for the tool.
+
+      # First remove it from the list of overridden variables, so we can test
+      # for unknown variables in the end.
+      CONFIGURE_OVERRIDDEN_VARIABLES="$try_remove_var"
+
+      # Check if the provided tool contains a complete path.
+      tool_specified="$GNM"
+      tool_basename="${tool_specified##*/}"
+      if test "x$tool_basename" = "x$tool_specified"; then
+        # A command without a complete path is provided, search $PATH.
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool GNM=$tool_basename" >&5
+$as_echo "$as_me: Will search for user supplied tool GNM=$tool_basename" >&6;}
+        # Extract the first word of "$tool_basename", so it can be a program name with args.
+set dummy $tool_basename; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_path_GNM+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $GNM in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_GNM="$GNM" # Let the user override the test with a path.
+  ;;
+  *)
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_path_GNM="$as_dir/$ac_word$ac_exec_ext"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+  ;;
+esac
+fi
+GNM=$ac_cv_path_GNM
+if test -n "$GNM"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $GNM" >&5
+$as_echo "$GNM" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+        if test "x$GNM" = x; then
+          as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
+        fi
+      else
+        # Otherwise we believe it is a complete path. Use it as it is.
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool GNM=$tool_specified" >&5
+$as_echo "$as_me: Will use user supplied tool GNM=$tool_specified" >&6;}
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for GNM" >&5
+$as_echo_n "checking for GNM... " >&6; }
+        if test ! -x "$tool_specified"; then
+          { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
+$as_echo "not found" >&6; }
+          as_fn_error $? "User supplied tool GNM=$tool_specified does not exist or is not executable" "$LINENO" 5
+        fi
+        { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
+$as_echo "$tool_specified" >&6; }
+      fi
+    fi
+  fi
+
+
 
   if test "x$OPENJDK_BUILD_OS_ENV" = "xwindows.cygwin"; then
 
@@ -26458,8 +35810,17 @@
 $as_echo "$as_me: Rewriting GNM to \"$new_complete\"" >&6;}
   fi
 
-    # Extract the first word of "strip", so it can be a program name with args.
-set dummy strip; ac_word=$2
+
+
+  # Publish this variable in the help.
+
+
+  if test "x$STRIP" = x; then
+    # The variable is not set by user, try to locate tool using the code snippet
+    for ac_prog in strip
+do
+  # Extract the first word of "$ac_prog", so it can be a program name with args.
+set dummy $ac_prog; ac_word=$2
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 $as_echo_n "checking for $ac_word... " >&6; }
 if ${ac_cv_path_STRIP+:} false; then :
@@ -26498,6 +35859,143 @@
 fi
 
 
+  test -n "$STRIP" && break
+done
+
+  else
+    # The variable is set, but is it from the command line or the environment?
+
+    # Try to remove the string !STRIP! from our list.
+    try_remove_var=${CONFIGURE_OVERRIDDEN_VARIABLES//!STRIP!/}
+    if test "x$try_remove_var" = "x$CONFIGURE_OVERRIDDEN_VARIABLES"; then
+      # If it failed, the variable was not from the command line. Ignore it,
+      # but warn the user (except for BASH, which is always set by the calling BASH).
+      if test "xSTRIP" != xBASH; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: Ignoring value of STRIP from the environment. Use command line variables instead." >&5
+$as_echo "$as_me: WARNING: Ignoring value of STRIP from the environment. Use command line variables instead." >&2;}
+      fi
+      # Try to locate tool using the code snippet
+      for ac_prog in strip
+do
+  # Extract the first word of "$ac_prog", so it can be a program name with args.
+set dummy $ac_prog; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_path_STRIP+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $STRIP in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_STRIP="$STRIP" # Let the user override the test with a path.
+  ;;
+  *)
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_path_STRIP="$as_dir/$ac_word$ac_exec_ext"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+  ;;
+esac
+fi
+STRIP=$ac_cv_path_STRIP
+if test -n "$STRIP"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $STRIP" >&5
+$as_echo "$STRIP" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+  test -n "$STRIP" && break
+done
+
+    else
+      # If it succeeded, then it was overridden by the user. We will use it
+      # for the tool.
+
+      # First remove it from the list of overridden variables, so we can test
+      # for unknown variables in the end.
+      CONFIGURE_OVERRIDDEN_VARIABLES="$try_remove_var"
+
+      # Check if the provided tool contains a complete path.
+      tool_specified="$STRIP"
+      tool_basename="${tool_specified##*/}"
+      if test "x$tool_basename" = "x$tool_specified"; then
+        # A command without a complete path is provided, search $PATH.
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool STRIP=$tool_basename" >&5
+$as_echo "$as_me: Will search for user supplied tool STRIP=$tool_basename" >&6;}
+        # Extract the first word of "$tool_basename", so it can be a program name with args.
+set dummy $tool_basename; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_path_STRIP+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $STRIP in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_STRIP="$STRIP" # Let the user override the test with a path.
+  ;;
+  *)
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_path_STRIP="$as_dir/$ac_word$ac_exec_ext"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+  ;;
+esac
+fi
+STRIP=$ac_cv_path_STRIP
+if test -n "$STRIP"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $STRIP" >&5
+$as_echo "$STRIP" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+        if test "x$STRIP" = x; then
+          as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
+        fi
+      else
+        # Otherwise we believe it is a complete path. Use it as it is.
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool STRIP=$tool_specified" >&5
+$as_echo "$as_me: Will use user supplied tool STRIP=$tool_specified" >&6;}
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for STRIP" >&5
+$as_echo_n "checking for STRIP... " >&6; }
+        if test ! -x "$tool_specified"; then
+          { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
+$as_echo "not found" >&6; }
+          as_fn_error $? "User supplied tool STRIP=$tool_specified does not exist or is not executable" "$LINENO" 5
+        fi
+        { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
+$as_echo "$tool_specified" >&6; }
+      fi
+    fi
+  fi
+
+
 
   if test "x$OPENJDK_BUILD_OS_ENV" = "xwindows.cygwin"; then
 
@@ -26764,8 +36262,17 @@
 $as_echo "$as_me: Rewriting STRIP to \"$new_complete\"" >&6;}
   fi
 
-    # Extract the first word of "mcs", so it can be a program name with args.
-set dummy mcs; ac_word=$2
+
+
+  # Publish this variable in the help.
+
+
+  if test "x$MCS" = x; then
+    # The variable is not set by user, try to locate tool using the code snippet
+    for ac_prog in mcs
+do
+  # Extract the first word of "$ac_prog", so it can be a program name with args.
+set dummy $ac_prog; ac_word=$2
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 $as_echo_n "checking for $ac_word... " >&6; }
 if ${ac_cv_path_MCS+:} false; then :
@@ -26804,6 +36311,143 @@
 fi
 
 
+  test -n "$MCS" && break
+done
+
+  else
+    # The variable is set, but is it from the command line or the environment?
+
+    # Try to remove the string !MCS! from our list.
+    try_remove_var=${CONFIGURE_OVERRIDDEN_VARIABLES//!MCS!/}
+    if test "x$try_remove_var" = "x$CONFIGURE_OVERRIDDEN_VARIABLES"; then
+      # If it failed, the variable was not from the command line. Ignore it,
+      # but warn the user (except for BASH, which is always set by the calling BASH).
+      if test "xMCS" != xBASH; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: Ignoring value of MCS from the environment. Use command line variables instead." >&5
+$as_echo "$as_me: WARNING: Ignoring value of MCS from the environment. Use command line variables instead." >&2;}
+      fi
+      # Try to locate tool using the code snippet
+      for ac_prog in mcs
+do
+  # Extract the first word of "$ac_prog", so it can be a program name with args.
+set dummy $ac_prog; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_path_MCS+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $MCS in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_MCS="$MCS" # Let the user override the test with a path.
+  ;;
+  *)
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_path_MCS="$as_dir/$ac_word$ac_exec_ext"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+  ;;
+esac
+fi
+MCS=$ac_cv_path_MCS
+if test -n "$MCS"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $MCS" >&5
+$as_echo "$MCS" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+  test -n "$MCS" && break
+done
+
+    else
+      # If it succeeded, then it was overridden by the user. We will use it
+      # for the tool.
+
+      # First remove it from the list of overridden variables, so we can test
+      # for unknown variables in the end.
+      CONFIGURE_OVERRIDDEN_VARIABLES="$try_remove_var"
+
+      # Check if the provided tool contains a complete path.
+      tool_specified="$MCS"
+      tool_basename="${tool_specified##*/}"
+      if test "x$tool_basename" = "x$tool_specified"; then
+        # A command without a complete path is provided, search $PATH.
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool MCS=$tool_basename" >&5
+$as_echo "$as_me: Will search for user supplied tool MCS=$tool_basename" >&6;}
+        # Extract the first word of "$tool_basename", so it can be a program name with args.
+set dummy $tool_basename; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_path_MCS+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $MCS in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_MCS="$MCS" # Let the user override the test with a path.
+  ;;
+  *)
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_path_MCS="$as_dir/$ac_word$ac_exec_ext"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+  ;;
+esac
+fi
+MCS=$ac_cv_path_MCS
+if test -n "$MCS"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $MCS" >&5
+$as_echo "$MCS" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+        if test "x$MCS" = x; then
+          as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
+        fi
+      else
+        # Otherwise we believe it is a complete path. Use it as it is.
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool MCS=$tool_specified" >&5
+$as_echo "$as_me: Will use user supplied tool MCS=$tool_specified" >&6;}
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for MCS" >&5
+$as_echo_n "checking for MCS... " >&6; }
+        if test ! -x "$tool_specified"; then
+          { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
+$as_echo "not found" >&6; }
+          as_fn_error $? "User supplied tool MCS=$tool_specified does not exist or is not executable" "$LINENO" 5
+        fi
+        { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
+$as_echo "$tool_specified" >&6; }
+      fi
+    fi
+  fi
+
+
 
   if test "x$OPENJDK_BUILD_OS_ENV" = "xwindows.cygwin"; then
 
@@ -27071,9 +36715,18 @@
   fi
 
   elif test "x$OPENJDK_TARGET_OS" != xwindows; then
+
+
+  # Publish this variable in the help.
+
+
+  if test "x$NM" = x; then
+    # The variable is not set by user, try to locate tool using the code snippet
     if test -n "$ac_tool_prefix"; then
-  # Extract the first word of "${ac_tool_prefix}nm", so it can be a program name with args.
-set dummy ${ac_tool_prefix}nm; ac_word=$2
+  for ac_prog in nm
+  do
+    # Extract the first word of "$ac_tool_prefix$ac_prog", so it can be a program name with args.
+set dummy $ac_tool_prefix$ac_prog; ac_word=$2
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 $as_echo_n "checking for $ac_word... " >&6; }
 if ${ac_cv_prog_NM+:} false; then :
@@ -27089,7 +36742,7 @@
   test -z "$as_dir" && as_dir=.
     for ac_exec_ext in '' $ac_executable_extensions; do
   if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
-    ac_cv_prog_NM="${ac_tool_prefix}nm"
+    ac_cv_prog_NM="$ac_tool_prefix$ac_prog"
     $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
     break 2
   fi
@@ -27109,11 +36762,15 @@
 fi
 
 
-fi
-if test -z "$ac_cv_prog_NM"; then
+    test -n "$NM" && break
+  done
+fi
+if test -z "$NM"; then
   ac_ct_NM=$NM
-  # Extract the first word of "nm", so it can be a program name with args.
-set dummy nm; ac_word=$2
+  for ac_prog in nm
+do
+  # Extract the first word of "$ac_prog", so it can be a program name with args.
+set dummy $ac_prog; ac_word=$2
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 $as_echo_n "checking for $ac_word... " >&6; }
 if ${ac_cv_prog_ac_ct_NM+:} false; then :
@@ -27129,7 +36786,7 @@
   test -z "$as_dir" && as_dir=.
     for ac_exec_ext in '' $ac_executable_extensions; do
   if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
-    ac_cv_prog_ac_ct_NM="nm"
+    ac_cv_prog_ac_ct_NM="$ac_prog"
     $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
     break 2
   fi
@@ -27148,6 +36805,10 @@
 $as_echo "no" >&6; }
 fi
 
+
+  test -n "$ac_ct_NM" && break
+done
+
   if test "x$ac_ct_NM" = x; then
     NM=""
   else
@@ -27159,9 +36820,196 @@
 esac
     NM=$ac_ct_NM
   fi
-else
-  NM="$ac_cv_prog_NM"
-fi
+fi
+
+  else
+    # The variable is set, but is it from the command line or the environment?
+
+    # Try to remove the string !NM! from our list.
+    try_remove_var=${CONFIGURE_OVERRIDDEN_VARIABLES//!NM!/}
+    if test "x$try_remove_var" = "x$CONFIGURE_OVERRIDDEN_VARIABLES"; then
+      # If it failed, the variable was not from the command line. Ignore it,
+      # but warn the user (except for BASH, which is always set by the calling BASH).
+      if test "xNM" != xBASH; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: Ignoring value of NM from the environment. Use command line variables instead." >&5
+$as_echo "$as_me: WARNING: Ignoring value of NM from the environment. Use command line variables instead." >&2;}
+      fi
+      # Try to locate tool using the code snippet
+      if test -n "$ac_tool_prefix"; then
+  for ac_prog in nm
+  do
+    # Extract the first word of "$ac_tool_prefix$ac_prog", so it can be a program name with args.
+set dummy $ac_tool_prefix$ac_prog; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_prog_NM+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  if test -n "$NM"; then
+  ac_cv_prog_NM="$NM" # Let the user override the test.
+else
+as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_prog_NM="$ac_tool_prefix$ac_prog"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+fi
+fi
+NM=$ac_cv_prog_NM
+if test -n "$NM"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $NM" >&5
+$as_echo "$NM" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+    test -n "$NM" && break
+  done
+fi
+if test -z "$NM"; then
+  ac_ct_NM=$NM
+  for ac_prog in nm
+do
+  # Extract the first word of "$ac_prog", so it can be a program name with args.
+set dummy $ac_prog; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_prog_ac_ct_NM+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  if test -n "$ac_ct_NM"; then
+  ac_cv_prog_ac_ct_NM="$ac_ct_NM" # Let the user override the test.
+else
+as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_prog_ac_ct_NM="$ac_prog"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+fi
+fi
+ac_ct_NM=$ac_cv_prog_ac_ct_NM
+if test -n "$ac_ct_NM"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_ct_NM" >&5
+$as_echo "$ac_ct_NM" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+  test -n "$ac_ct_NM" && break
+done
+
+  if test "x$ac_ct_NM" = x; then
+    NM=""
+  else
+    case $cross_compiling:$ac_tool_warned in
+yes:)
+{ $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5
+$as_echo "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;}
+ac_tool_warned=yes ;;
+esac
+    NM=$ac_ct_NM
+  fi
+fi
+
+    else
+      # If it succeeded, then it was overridden by the user. We will use it
+      # for the tool.
+
+      # First remove it from the list of overridden variables, so we can test
+      # for unknown variables in the end.
+      CONFIGURE_OVERRIDDEN_VARIABLES="$try_remove_var"
+
+      # Check if the provided tool contains a complete path.
+      tool_specified="$NM"
+      tool_basename="${tool_specified##*/}"
+      if test "x$tool_basename" = "x$tool_specified"; then
+        # A command without a complete path is provided, search $PATH.
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool NM=$tool_basename" >&5
+$as_echo "$as_me: Will search for user supplied tool NM=$tool_basename" >&6;}
+        # Extract the first word of "$tool_basename", so it can be a program name with args.
+set dummy $tool_basename; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_path_NM+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $NM in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_NM="$NM" # Let the user override the test with a path.
+  ;;
+  *)
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_path_NM="$as_dir/$ac_word$ac_exec_ext"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+  ;;
+esac
+fi
+NM=$ac_cv_path_NM
+if test -n "$NM"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $NM" >&5
+$as_echo "$NM" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+        if test "x$NM" = x; then
+          as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
+        fi
+      else
+        # Otherwise we believe it is a complete path. Use it as it is.
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool NM=$tool_specified" >&5
+$as_echo "$as_me: Will use user supplied tool NM=$tool_specified" >&6;}
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for NM" >&5
+$as_echo_n "checking for NM... " >&6; }
+        if test ! -x "$tool_specified"; then
+          { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
+$as_echo "not found" >&6; }
+          as_fn_error $? "User supplied tool NM=$tool_specified does not exist or is not executable" "$LINENO" 5
+        fi
+        { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
+$as_echo "$tool_specified" >&6; }
+      fi
+    fi
+  fi
+
 
 
   if test "x$OPENJDK_BUILD_OS_ENV" = "xwindows.cygwin"; then
@@ -27431,9 +37279,18 @@
 
     GNM="$NM"
 
+
+
+  # Publish this variable in the help.
+
+
+  if test "x$STRIP" = x; then
+    # The variable is not set by user, try to locate tool using the code snippet
     if test -n "$ac_tool_prefix"; then
-  # Extract the first word of "${ac_tool_prefix}strip", so it can be a program name with args.
-set dummy ${ac_tool_prefix}strip; ac_word=$2
+  for ac_prog in strip
+  do
+    # Extract the first word of "$ac_tool_prefix$ac_prog", so it can be a program name with args.
+set dummy $ac_tool_prefix$ac_prog; ac_word=$2
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 $as_echo_n "checking for $ac_word... " >&6; }
 if ${ac_cv_prog_STRIP+:} false; then :
@@ -27449,7 +37306,7 @@
   test -z "$as_dir" && as_dir=.
     for ac_exec_ext in '' $ac_executable_extensions; do
   if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
-    ac_cv_prog_STRIP="${ac_tool_prefix}strip"
+    ac_cv_prog_STRIP="$ac_tool_prefix$ac_prog"
     $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
     break 2
   fi
@@ -27469,11 +37326,15 @@
 fi
 
 
-fi
-if test -z "$ac_cv_prog_STRIP"; then
+    test -n "$STRIP" && break
+  done
+fi
+if test -z "$STRIP"; then
   ac_ct_STRIP=$STRIP
-  # Extract the first word of "strip", so it can be a program name with args.
-set dummy strip; ac_word=$2
+  for ac_prog in strip
+do
+  # Extract the first word of "$ac_prog", so it can be a program name with args.
+set dummy $ac_prog; ac_word=$2
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 $as_echo_n "checking for $ac_word... " >&6; }
 if ${ac_cv_prog_ac_ct_STRIP+:} false; then :
@@ -27489,7 +37350,7 @@
   test -z "$as_dir" && as_dir=.
     for ac_exec_ext in '' $ac_executable_extensions; do
   if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
-    ac_cv_prog_ac_ct_STRIP="strip"
+    ac_cv_prog_ac_ct_STRIP="$ac_prog"
     $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
     break 2
   fi
@@ -27508,6 +37369,10 @@
 $as_echo "no" >&6; }
 fi
 
+
+  test -n "$ac_ct_STRIP" && break
+done
+
   if test "x$ac_ct_STRIP" = x; then
     STRIP=""
   else
@@ -27519,9 +37384,196 @@
 esac
     STRIP=$ac_ct_STRIP
   fi
-else
-  STRIP="$ac_cv_prog_STRIP"
-fi
+fi
+
+  else
+    # The variable is set, but is it from the command line or the environment?
+
+    # Try to remove the string !STRIP! from our list.
+    try_remove_var=${CONFIGURE_OVERRIDDEN_VARIABLES//!STRIP!/}
+    if test "x$try_remove_var" = "x$CONFIGURE_OVERRIDDEN_VARIABLES"; then
+      # If it failed, the variable was not from the command line. Ignore it,
+      # but warn the user (except for BASH, which is always set by the calling BASH).
+      if test "xSTRIP" != xBASH; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: Ignoring value of STRIP from the environment. Use command line variables instead." >&5
+$as_echo "$as_me: WARNING: Ignoring value of STRIP from the environment. Use command line variables instead." >&2;}
+      fi
+      # Try to locate tool using the code snippet
+      if test -n "$ac_tool_prefix"; then
+  for ac_prog in strip
+  do
+    # Extract the first word of "$ac_tool_prefix$ac_prog", so it can be a program name with args.
+set dummy $ac_tool_prefix$ac_prog; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_prog_STRIP+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  if test -n "$STRIP"; then
+  ac_cv_prog_STRIP="$STRIP" # Let the user override the test.
+else
+as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_prog_STRIP="$ac_tool_prefix$ac_prog"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+fi
+fi
+STRIP=$ac_cv_prog_STRIP
+if test -n "$STRIP"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $STRIP" >&5
+$as_echo "$STRIP" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+    test -n "$STRIP" && break
+  done
+fi
+if test -z "$STRIP"; then
+  ac_ct_STRIP=$STRIP
+  for ac_prog in strip
+do
+  # Extract the first word of "$ac_prog", so it can be a program name with args.
+set dummy $ac_prog; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_prog_ac_ct_STRIP+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  if test -n "$ac_ct_STRIP"; then
+  ac_cv_prog_ac_ct_STRIP="$ac_ct_STRIP" # Let the user override the test.
+else
+as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_prog_ac_ct_STRIP="$ac_prog"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+fi
+fi
+ac_ct_STRIP=$ac_cv_prog_ac_ct_STRIP
+if test -n "$ac_ct_STRIP"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_ct_STRIP" >&5
+$as_echo "$ac_ct_STRIP" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+  test -n "$ac_ct_STRIP" && break
+done
+
+  if test "x$ac_ct_STRIP" = x; then
+    STRIP=""
+  else
+    case $cross_compiling:$ac_tool_warned in
+yes:)
+{ $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5
+$as_echo "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;}
+ac_tool_warned=yes ;;
+esac
+    STRIP=$ac_ct_STRIP
+  fi
+fi
+
+    else
+      # If it succeeded, then it was overridden by the user. We will use it
+      # for the tool.
+
+      # First remove it from the list of overridden variables, so we can test
+      # for unknown variables in the end.
+      CONFIGURE_OVERRIDDEN_VARIABLES="$try_remove_var"
+
+      # Check if the provided tool contains a complete path.
+      tool_specified="$STRIP"
+      tool_basename="${tool_specified##*/}"
+      if test "x$tool_basename" = "x$tool_specified"; then
+        # A command without a complete path is provided, search $PATH.
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool STRIP=$tool_basename" >&5
+$as_echo "$as_me: Will search for user supplied tool STRIP=$tool_basename" >&6;}
+        # Extract the first word of "$tool_basename", so it can be a program name with args.
+set dummy $tool_basename; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_path_STRIP+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $STRIP in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_STRIP="$STRIP" # Let the user override the test with a path.
+  ;;
+  *)
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_path_STRIP="$as_dir/$ac_word$ac_exec_ext"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+  ;;
+esac
+fi
+STRIP=$ac_cv_path_STRIP
+if test -n "$STRIP"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $STRIP" >&5
+$as_echo "$STRIP" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+        if test "x$STRIP" = x; then
+          as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
+        fi
+      else
+        # Otherwise we believe it is a complete path. Use it as it is.
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool STRIP=$tool_specified" >&5
+$as_echo "$as_me: Will use user supplied tool STRIP=$tool_specified" >&6;}
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for STRIP" >&5
+$as_echo_n "checking for STRIP... " >&6; }
+        if test ! -x "$tool_specified"; then
+          { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
+$as_echo "not found" >&6; }
+          as_fn_error $? "User supplied tool STRIP=$tool_specified does not exist or is not executable" "$LINENO" 5
+        fi
+        { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
+$as_echo "$tool_specified" >&6; }
+      fi
+    fi
+  fi
+
 
 
   if test "x$OPENJDK_BUILD_OS_ENV" = "xwindows.cygwin"; then
@@ -27794,6 +37846,13 @@
   # objcopy is used for moving debug symbols to separate files when
   # full debug symbols are enabled.
   if test "x$OPENJDK_TARGET_OS" = xsolaris || test "x$OPENJDK_TARGET_OS" = xlinux; then
+
+
+  # Publish this variable in the help.
+
+
+  if test "x$OBJCOPY" = x; then
+    # The variable is not set by user, try to locate tool using the code snippet
     if test -n "$ac_tool_prefix"; then
   for ac_prog in gobjcopy objcopy
   do
@@ -27894,6 +37953,195 @@
   fi
 fi
 
+  else
+    # The variable is set, but is it from the command line or the environment?
+
+    # Try to remove the string !OBJCOPY! from our list.
+    try_remove_var=${CONFIGURE_OVERRIDDEN_VARIABLES//!OBJCOPY!/}
+    if test "x$try_remove_var" = "x$CONFIGURE_OVERRIDDEN_VARIABLES"; then
+      # If it failed, the variable was not from the command line. Ignore it,
+      # but warn the user (except for BASH, which is always set by the calling BASH).
+      if test "xOBJCOPY" != xBASH; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: Ignoring value of OBJCOPY from the environment. Use command line variables instead." >&5
+$as_echo "$as_me: WARNING: Ignoring value of OBJCOPY from the environment. Use command line variables instead." >&2;}
+      fi
+      # Try to locate tool using the code snippet
+      if test -n "$ac_tool_prefix"; then
+  for ac_prog in gobjcopy objcopy
+  do
+    # Extract the first word of "$ac_tool_prefix$ac_prog", so it can be a program name with args.
+set dummy $ac_tool_prefix$ac_prog; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_prog_OBJCOPY+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  if test -n "$OBJCOPY"; then
+  ac_cv_prog_OBJCOPY="$OBJCOPY" # Let the user override the test.
+else
+as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_prog_OBJCOPY="$ac_tool_prefix$ac_prog"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+fi
+fi
+OBJCOPY=$ac_cv_prog_OBJCOPY
+if test -n "$OBJCOPY"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $OBJCOPY" >&5
+$as_echo "$OBJCOPY" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+    test -n "$OBJCOPY" && break
+  done
+fi
+if test -z "$OBJCOPY"; then
+  ac_ct_OBJCOPY=$OBJCOPY
+  for ac_prog in gobjcopy objcopy
+do
+  # Extract the first word of "$ac_prog", so it can be a program name with args.
+set dummy $ac_prog; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_prog_ac_ct_OBJCOPY+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  if test -n "$ac_ct_OBJCOPY"; then
+  ac_cv_prog_ac_ct_OBJCOPY="$ac_ct_OBJCOPY" # Let the user override the test.
+else
+as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_prog_ac_ct_OBJCOPY="$ac_prog"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+fi
+fi
+ac_ct_OBJCOPY=$ac_cv_prog_ac_ct_OBJCOPY
+if test -n "$ac_ct_OBJCOPY"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_ct_OBJCOPY" >&5
+$as_echo "$ac_ct_OBJCOPY" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+  test -n "$ac_ct_OBJCOPY" && break
+done
+
+  if test "x$ac_ct_OBJCOPY" = x; then
+    OBJCOPY=""
+  else
+    case $cross_compiling:$ac_tool_warned in
+yes:)
+{ $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5
+$as_echo "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;}
+ac_tool_warned=yes ;;
+esac
+    OBJCOPY=$ac_ct_OBJCOPY
+  fi
+fi
+
+    else
+      # If it succeeded, then it was overridden by the user. We will use it
+      # for the tool.
+
+      # First remove it from the list of overridden variables, so we can test
+      # for unknown variables in the end.
+      CONFIGURE_OVERRIDDEN_VARIABLES="$try_remove_var"
+
+      # Check if the provided tool contains a complete path.
+      tool_specified="$OBJCOPY"
+      tool_basename="${tool_specified##*/}"
+      if test "x$tool_basename" = "x$tool_specified"; then
+        # A command without a complete path is provided, search $PATH.
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool OBJCOPY=$tool_basename" >&5
+$as_echo "$as_me: Will search for user supplied tool OBJCOPY=$tool_basename" >&6;}
+        # Extract the first word of "$tool_basename", so it can be a program name with args.
+set dummy $tool_basename; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_path_OBJCOPY+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $OBJCOPY in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_OBJCOPY="$OBJCOPY" # Let the user override the test with a path.
+  ;;
+  *)
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_path_OBJCOPY="$as_dir/$ac_word$ac_exec_ext"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+  ;;
+esac
+fi
+OBJCOPY=$ac_cv_path_OBJCOPY
+if test -n "$OBJCOPY"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $OBJCOPY" >&5
+$as_echo "$OBJCOPY" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+        if test "x$OBJCOPY" = x; then
+          as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
+        fi
+      else
+        # Otherwise we believe it is a complete path. Use it as it is.
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool OBJCOPY=$tool_specified" >&5
+$as_echo "$as_me: Will use user supplied tool OBJCOPY=$tool_specified" >&6;}
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for OBJCOPY" >&5
+$as_echo_n "checking for OBJCOPY... " >&6; }
+        if test ! -x "$tool_specified"; then
+          { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
+$as_echo "not found" >&6; }
+          as_fn_error $? "User supplied tool OBJCOPY=$tool_specified does not exist or is not executable" "$LINENO" 5
+        fi
+        { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
+$as_echo "$tool_specified" >&6; }
+      fi
+    fi
+  fi
+
+
     # Only call fixup if objcopy was found.
     if test -n "$OBJCOPY"; then
 
@@ -28165,7 +38413,14 @@
     fi
   fi
 
-  if test -n "$ac_tool_prefix"; then
+
+
+  # Publish this variable in the help.
+
+
+  if test "x$OBJDUMP" = x; then
+    # The variable is not set by user, try to locate tool using the code snippet
+    if test -n "$ac_tool_prefix"; then
   for ac_prog in gobjdump objdump
   do
     # Extract the first word of "$ac_tool_prefix$ac_prog", so it can be a program name with args.
@@ -28265,6 +38520,195 @@
   fi
 fi
 
+  else
+    # The variable is set, but is it from the command line or the environment?
+
+    # Try to remove the string !OBJDUMP! from our list.
+    try_remove_var=${CONFIGURE_OVERRIDDEN_VARIABLES//!OBJDUMP!/}
+    if test "x$try_remove_var" = "x$CONFIGURE_OVERRIDDEN_VARIABLES"; then
+      # If it failed, the variable was not from the command line. Ignore it,
+      # but warn the user (except for BASH, which is always set by the calling BASH).
+      if test "xOBJDUMP" != xBASH; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: Ignoring value of OBJDUMP from the environment. Use command line variables instead." >&5
+$as_echo "$as_me: WARNING: Ignoring value of OBJDUMP from the environment. Use command line variables instead." >&2;}
+      fi
+      # Try to locate tool using the code snippet
+      if test -n "$ac_tool_prefix"; then
+  for ac_prog in gobjdump objdump
+  do
+    # Extract the first word of "$ac_tool_prefix$ac_prog", so it can be a program name with args.
+set dummy $ac_tool_prefix$ac_prog; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_prog_OBJDUMP+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  if test -n "$OBJDUMP"; then
+  ac_cv_prog_OBJDUMP="$OBJDUMP" # Let the user override the test.
+else
+as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_prog_OBJDUMP="$ac_tool_prefix$ac_prog"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+fi
+fi
+OBJDUMP=$ac_cv_prog_OBJDUMP
+if test -n "$OBJDUMP"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $OBJDUMP" >&5
+$as_echo "$OBJDUMP" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+    test -n "$OBJDUMP" && break
+  done
+fi
+if test -z "$OBJDUMP"; then
+  ac_ct_OBJDUMP=$OBJDUMP
+  for ac_prog in gobjdump objdump
+do
+  # Extract the first word of "$ac_prog", so it can be a program name with args.
+set dummy $ac_prog; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_prog_ac_ct_OBJDUMP+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  if test -n "$ac_ct_OBJDUMP"; then
+  ac_cv_prog_ac_ct_OBJDUMP="$ac_ct_OBJDUMP" # Let the user override the test.
+else
+as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_prog_ac_ct_OBJDUMP="$ac_prog"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+fi
+fi
+ac_ct_OBJDUMP=$ac_cv_prog_ac_ct_OBJDUMP
+if test -n "$ac_ct_OBJDUMP"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_ct_OBJDUMP" >&5
+$as_echo "$ac_ct_OBJDUMP" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+  test -n "$ac_ct_OBJDUMP" && break
+done
+
+  if test "x$ac_ct_OBJDUMP" = x; then
+    OBJDUMP=""
+  else
+    case $cross_compiling:$ac_tool_warned in
+yes:)
+{ $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5
+$as_echo "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;}
+ac_tool_warned=yes ;;
+esac
+    OBJDUMP=$ac_ct_OBJDUMP
+  fi
+fi
+
+    else
+      # If it succeeded, then it was overridden by the user. We will use it
+      # for the tool.
+
+      # First remove it from the list of overridden variables, so we can test
+      # for unknown variables in the end.
+      CONFIGURE_OVERRIDDEN_VARIABLES="$try_remove_var"
+
+      # Check if the provided tool contains a complete path.
+      tool_specified="$OBJDUMP"
+      tool_basename="${tool_specified##*/}"
+      if test "x$tool_basename" = "x$tool_specified"; then
+        # A command without a complete path is provided, search $PATH.
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool OBJDUMP=$tool_basename" >&5
+$as_echo "$as_me: Will search for user supplied tool OBJDUMP=$tool_basename" >&6;}
+        # Extract the first word of "$tool_basename", so it can be a program name with args.
+set dummy $tool_basename; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_path_OBJDUMP+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $OBJDUMP in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_OBJDUMP="$OBJDUMP" # Let the user override the test with a path.
+  ;;
+  *)
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_path_OBJDUMP="$as_dir/$ac_word$ac_exec_ext"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+  ;;
+esac
+fi
+OBJDUMP=$ac_cv_path_OBJDUMP
+if test -n "$OBJDUMP"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $OBJDUMP" >&5
+$as_echo "$OBJDUMP" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+        if test "x$OBJDUMP" = x; then
+          as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
+        fi
+      else
+        # Otherwise we believe it is a complete path. Use it as it is.
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool OBJDUMP=$tool_specified" >&5
+$as_echo "$as_me: Will use user supplied tool OBJDUMP=$tool_specified" >&6;}
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for OBJDUMP" >&5
+$as_echo_n "checking for OBJDUMP... " >&6; }
+        if test ! -x "$tool_specified"; then
+          { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
+$as_echo "not found" >&6; }
+          as_fn_error $? "User supplied tool OBJDUMP=$tool_specified does not exist or is not executable" "$LINENO" 5
+        fi
+        { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
+$as_echo "$tool_specified" >&6; }
+      fi
+    fi
+  fi
+
+
   if test "x$OBJDUMP" != x; then
     # Only used for compare.sh; we can live without it. BASIC_FIXUP_EXECUTABLE bails if argument is missing.
 
@@ -28536,8 +38980,17 @@
   fi
 
   if test "x$OPENJDK_TARGET_OS" = "xmacosx"; then
-    # Extract the first word of "lipo", so it can be a program name with args.
-set dummy lipo; ac_word=$2
+
+
+  # Publish this variable in the help.
+
+
+  if test "x$LIPO" = x; then
+    # The variable is not set by user, try to locate tool using the code snippet
+    for ac_prog in lipo
+do
+  # Extract the first word of "$ac_prog", so it can be a program name with args.
+set dummy $ac_prog; ac_word=$2
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 $as_echo_n "checking for $ac_word... " >&6; }
 if ${ac_cv_path_LIPO+:} false; then :
@@ -28576,6 +39029,143 @@
 fi
 
 
+  test -n "$LIPO" && break
+done
+
+  else
+    # The variable is set, but is it from the command line or the environment?
+
+    # Try to remove the string !LIPO! from our list.
+    try_remove_var=${CONFIGURE_OVERRIDDEN_VARIABLES//!LIPO!/}
+    if test "x$try_remove_var" = "x$CONFIGURE_OVERRIDDEN_VARIABLES"; then
+      # If it failed, the variable was not from the command line. Ignore it,
+      # but warn the user (except for BASH, which is always set by the calling BASH).
+      if test "xLIPO" != xBASH; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: Ignoring value of LIPO from the environment. Use command line variables instead." >&5
+$as_echo "$as_me: WARNING: Ignoring value of LIPO from the environment. Use command line variables instead." >&2;}
+      fi
+      # Try to locate tool using the code snippet
+      for ac_prog in lipo
+do
+  # Extract the first word of "$ac_prog", so it can be a program name with args.
+set dummy $ac_prog; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_path_LIPO+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $LIPO in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_LIPO="$LIPO" # Let the user override the test with a path.
+  ;;
+  *)
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_path_LIPO="$as_dir/$ac_word$ac_exec_ext"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+  ;;
+esac
+fi
+LIPO=$ac_cv_path_LIPO
+if test -n "$LIPO"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $LIPO" >&5
+$as_echo "$LIPO" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+  test -n "$LIPO" && break
+done
+
+    else
+      # If it succeeded, then it was overridden by the user. We will use it
+      # for the tool.
+
+      # First remove it from the list of overridden variables, so we can test
+      # for unknown variables in the end.
+      CONFIGURE_OVERRIDDEN_VARIABLES="$try_remove_var"
+
+      # Check if the provided tool contains a complete path.
+      tool_specified="$LIPO"
+      tool_basename="${tool_specified##*/}"
+      if test "x$tool_basename" = "x$tool_specified"; then
+        # A command without a complete path is provided, search $PATH.
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Will search for user supplied tool LIPO=$tool_basename" >&5
+$as_echo "$as_me: Will search for user supplied tool LIPO=$tool_basename" >&6;}
+        # Extract the first word of "$tool_basename", so it can be a program name with args.
+set dummy $tool_basename; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_path_LIPO+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $LIPO in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_LIPO="$LIPO" # Let the user override the test with a path.
+  ;;
+  *)
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_path_LIPO="$as_dir/$ac_word$ac_exec_ext"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+  ;;
+esac
+fi
+LIPO=$ac_cv_path_LIPO
+if test -n "$LIPO"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $LIPO" >&5
+$as_echo "$LIPO" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+        if test "x$LIPO" = x; then
+          as_fn_error $? "User supplied tool $tool_basename could not be found" "$LINENO" 5
+        fi
+      else
+        # Otherwise we believe it is a complete path. Use it as it is.
+        { $as_echo "$as_me:${as_lineno-$LINENO}: Will use user supplied tool LIPO=$tool_specified" >&5
+$as_echo "$as_me: Will use user supplied tool LIPO=$tool_specified" >&6;}
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for LIPO" >&5
+$as_echo_n "checking for LIPO... " >&6; }
+        if test ! -x "$tool_specified"; then
+          { $as_echo "$as_me:${as_lineno-$LINENO}: result: not found" >&5
+$as_echo "not found" >&6; }
+          as_fn_error $? "User supplied tool LIPO=$tool_specified does not exist or is not executable" "$LINENO" 5
+        fi
+        { $as_echo "$as_me:${as_lineno-$LINENO}: result: $tool_specified" >&5
+$as_echo "$tool_specified" >&6; }
+      fi
+    fi
+  fi
+
+
 
   if test "x$OPENJDK_BUILD_OS_ENV" = "xwindows.cygwin"; then
 
@@ -36180,65 +46770,7 @@
     if test "x$TOOLS_DIR" != x; then
       PATH=$TOOLS_DIR:$PATH
     fi
-
-  for ac_prog in ccache
-do
-  # Extract the first word of "$ac_prog", so it can be a program name with args.
-set dummy $ac_prog; ac_word=$2
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
-$as_echo_n "checking for $ac_word... " >&6; }
-if ${ac_cv_path_CCACHE+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
-  case $CCACHE in
-  [\\/]* | ?:[\\/]*)
-  ac_cv_path_CCACHE="$CCACHE" # Let the user override the test with a path.
-  ;;
-  *)
-  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
-for as_dir in $PATH
-do
-  IFS=$as_save_IFS
-  test -z "$as_dir" && as_dir=.
-    for ac_exec_ext in '' $ac_executable_extensions; do
-  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
-    ac_cv_path_CCACHE="$as_dir/$ac_word$ac_exec_ext"
-    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
-    break 2
-  fi
-done
-  done
-IFS=$as_save_IFS
-
-  ;;
-esac
-fi
-CCACHE=$ac_cv_path_CCACHE
-if test -n "$CCACHE"; then
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $CCACHE" >&5
-$as_echo "$CCACHE" >&6; }
-else
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
-$as_echo "no" >&6; }
-fi
-
-
-  test -n "$CCACHE" && break
-done
-
-
-  if test "x$CCACHE" = x; then
-    if test "xccache" = x; then
-      PROG_NAME=ccache
-    else
-      PROG_NAME=ccache
-    fi
-    { $as_echo "$as_me:${as_lineno-$LINENO}: Could not find $PROG_NAME!" >&5
-$as_echo "$as_me: Could not find $PROG_NAME!" >&6;}
-    as_fn_error $? "Cannot continue" "$LINENO" 5
-  fi
-
-
+    BASIC_REQUIRE_PROG(CCACHE, ccache)
     CCACHE_STATUS="enabled"
     PATH="$OLD_PATH"
   elif test "x$enable_ccache" = xno; then
@@ -36351,6 +46883,15 @@
   fi
 
 
+  # Did user specify any unknown variables?
+
+  if test "x$CONFIGURE_OVERRIDDEN_VARIABLES" != x; then
+    # Replace the separating ! with spaces before presenting for end user.
+    unknown_variables=${CONFIGURE_OVERRIDDEN_VARIABLES//!/ }
+    as_fn_error $? "The following variables are unknown to configure: $unknown_variables" "$LINENO" 5
+  fi
+
+
   { $as_echo "$as_me:${as_lineno-$LINENO}: checking if build directory is on local disk" >&5
 $as_echo_n "checking if build directory is on local disk... " >&6; }
 
--- a/common/autoconf/toolchain.m4	Wed Jan 29 11:04:37 2014 +0100
+++ b/common/autoconf/toolchain.m4	Wed Jan 29 11:21:54 2014 +0100
@@ -238,11 +238,11 @@
     # otherwise we might pick up cross-compilers which don't use standard naming.
     # Otherwise, we'll set the BUILD_tools to the native tools, but that'll have
     # to wait until they are properly discovered.
-    AC_PATH_PROGS(BUILD_CC, [cl cc gcc])
+    BASIC_PATH_PROGS(BUILD_CC, [cl cc gcc])
     BASIC_FIXUP_EXECUTABLE(BUILD_CC)
-    AC_PATH_PROGS(BUILD_CXX, [cl CC g++])
+    BASIC_PATH_PROGS(BUILD_CXX, [cl CC g++])
     BASIC_FIXUP_EXECUTABLE(BUILD_CXX)
-    AC_PATH_PROG(BUILD_LD, ld)
+    BASIC_PATH_PROGS(BUILD_LD, ld)
     BASIC_FIXUP_EXECUTABLE(BUILD_LD)
   fi
   AC_SUBST(BUILD_CC)
@@ -353,7 +353,7 @@
   AC_SUBST(LDEXECXX)
 
   if test "x$OPENJDK_TARGET_OS" != xwindows; then
-    AC_CHECK_TOOL(AR, ar)
+    BASIC_CHECK_TOOLS(AR, ar)
     BASIC_FIXUP_EXECUTABLE(AR)
   fi
   if test "x$OPENJDK_TARGET_OS" = xmacosx; then
@@ -480,7 +480,7 @@
 
   # Find the right assembler.
   if test "x$OPENJDK_TARGET_OS" = xsolaris; then
-    AC_PATH_PROG(AS, as)
+    BASIC_PATH_PROGS(AS, as)
     BASIC_FIXUP_EXECUTABLE(AS)
   else
     AS="$CC -c"
@@ -488,41 +488,41 @@
   AC_SUBST(AS)
 
   if test "x$OPENJDK_TARGET_OS" = xsolaris; then
-    AC_PATH_PROG(NM, nm)
+    BASIC_PATH_PROGS(NM, nm)
     BASIC_FIXUP_EXECUTABLE(NM)
-    AC_PATH_PROG(GNM, gnm)
+    BASIC_PATH_PROGS(GNM, gnm)
     BASIC_FIXUP_EXECUTABLE(GNM)
-    AC_PATH_PROG(STRIP, strip)
+    BASIC_PATH_PROGS(STRIP, strip)
     BASIC_FIXUP_EXECUTABLE(STRIP)
-    AC_PATH_PROG(MCS, mcs)
+    BASIC_PATH_PROGS(MCS, mcs)
     BASIC_FIXUP_EXECUTABLE(MCS)
   elif test "x$OPENJDK_TARGET_OS" != xwindows; then
-    AC_CHECK_TOOL(NM, nm)
+    BASIC_CHECK_TOOLS(NM, nm)
     BASIC_FIXUP_EXECUTABLE(NM)
     GNM="$NM"
     AC_SUBST(GNM)
-    AC_CHECK_TOOL(STRIP, strip)
+    BASIC_CHECK_TOOLS(STRIP, strip)
     BASIC_FIXUP_EXECUTABLE(STRIP)
   fi
 
   # objcopy is used for moving debug symbols to separate files when
   # full debug symbols are enabled.
   if test "x$OPENJDK_TARGET_OS" = xsolaris || test "x$OPENJDK_TARGET_OS" = xlinux; then
-    AC_CHECK_TOOLS(OBJCOPY, [gobjcopy objcopy])
+    BASIC_CHECK_TOOLS(OBJCOPY, [gobjcopy objcopy])
     # Only call fixup if objcopy was found.
     if test -n "$OBJCOPY"; then
       BASIC_FIXUP_EXECUTABLE(OBJCOPY)
     fi
   fi
 
-  AC_CHECK_TOOLS(OBJDUMP, [gobjdump objdump])
+  BASIC_CHECK_TOOLS(OBJDUMP, [gobjdump objdump])
   if test "x$OBJDUMP" != x; then
     # Only used for compare.sh; we can live without it. BASIC_FIXUP_EXECUTABLE bails if argument is missing.
     BASIC_FIXUP_EXECUTABLE(OBJDUMP)
   fi
 
   if test "x$OPENJDK_TARGET_OS" = "xmacosx"; then
-    AC_PATH_PROG(LIPO, lipo)
+    BASIC_PATH_PROGS(LIPO, lipo)
     BASIC_FIXUP_EXECUTABLE(LIPO)
   fi
 
@@ -1244,7 +1244,7 @@
       AC_MSG_RESULT($JTREGEXE)
     else
       # try to find jtreg on path
-      BASIC_REQUIRE_PROG(JTREGEXE, jtreg)
+      BASIC_REQUIRE_PROGS(JTREGEXE, jtreg)
       JT_HOME="`$DIRNAME $JTREGEXE`"
     fi
   fi