--- a/make/Init.gmk	Thu Oct 26 10:39:59 2017 +0200
+++ b/make/Init.gmk	Thu Oct 26 13:20:47 2017 +0200
@@ -223,9 +223,6 @@
   # Our helper functions.
   include $(TOPDIR)/make/InitSupport.gmk
 
-  # Verify that the spec file we included seems okay.
-  $(eval $(call CheckSpecSanity))
-
   # Parse COMPARE_BUILD (for makefile development)
   $(eval $(call ParseCompareBuild))
 

--- a/make/InitSupport.gmk	Thu Oct 26 10:39:59 2017 +0200
+++ b/make/InitSupport.gmk	Thu Oct 26 13:20:47 2017 +0200
@@ -359,23 +359,6 @@
 
   BUILD_LOG_PIPE := > >($(TEE) -a $(BUILD_LOG)) 2> >($(TEE) -a $(BUILD_LOG) >&2) && wait
 
-  # Sanity check the spec file, so it matches this source code
-  define CheckSpecSanity
-    ifneq ($$(ACTUAL_TOPDIR), $$(TOPDIR))
-      ifneq ($$(ACTUAL_TOPDIR), $$(ORIGINAL_TOPDIR))
-        ifneq ($$(ACTUAL_TOPDIR), $$(CANONICAL_TOPDIR))
-          $$(info Error: SPEC mismatch! Current working directory)
-          $$(info $$(ACTUAL_TOPDIR))
-          $$(info does not match either TOPDIR, ORIGINAL_TOPDIR or CANONICAL_TOPDIR)
-          $$(info $$(TOPDIR))
-          $$(info $$(ORIGINAL_TOPDIR))
-          $$(info $$(CANONICAL_TOPDIR))
-          $$(error Cannot continue)
-        endif
-      endif
-    endif
-  endef
-
   # Parse COMPARE_BUILD into COMPARE_BUILD_*
   # Syntax: COMPARE_BUILD=CONF=<configure options>:PATCH=<patch file>:
   #         MAKE=<make targets>:COMP_OPTS=<compare script options>:

--- a/make/autoconf/basics.m4	Thu Oct 26 10:39:59 2017 +0200
+++ b/make/autoconf/basics.m4	Thu Oct 26 13:20:47 2017 +0200
@@ -561,19 +561,10 @@
   AC_MSG_RESULT([$TOPDIR])
   AC_SUBST(TOPDIR)
 
-  # Save the original version of TOPDIR for string comparisons
-  ORIGINAL_TOPDIR="$TOPDIR"
-  AC_SUBST(ORIGINAL_TOPDIR)
-
   # We can only call BASIC_FIXUP_PATH after BASIC_CHECK_PATHS_WINDOWS.
   BASIC_FIXUP_PATH(CURDIR)
   BASIC_FIXUP_PATH(TOPDIR)
 
-  # Calculate a canonical version of TOPDIR for string comparisons
-  CANONICAL_TOPDIR=$TOPDIR
-  BASIC_REMOVE_SYMBOLIC_LINKS([CANONICAL_TOPDIR])
-  AC_SUBST(CANONICAL_TOPDIR)
-
   # Locate the directory of this script.
   AUTOCONF_DIR=$TOPDIR/make/autoconf
 

--- a/make/autoconf/generated-configure.sh	Thu Oct 26 10:39:59 2017 +0200
+++ b/make/autoconf/generated-configure.sh	Thu Oct 26 13:20:47 2017 +0200
@@ -965,8 +965,6 @@
 HOTSPOT_DEBUG_LEVEL
 JDK_VARIANT
 USERNAME
-CANONICAL_TOPDIR
-ORIGINAL_TOPDIR
 TOPDIR
 PATH_SEP
 HOTSPOT_BUILD_CPU_DEFINE
@@ -5117,7 +5115,7 @@
 #CUSTOM_AUTOCONF_INCLUDE
 
 # Do not change or remove the following line, it is needed for consistency checks:
-DATE_WHEN_GENERATED=1508746828
+DATE_WHEN_GENERATED=1509013542
 
 ###############################################################################
 #
@@ -16536,10 +16534,6 @@
 $as_echo "$TOPDIR" >&6; }
 
 
-  # Save the original version of TOPDIR for string comparisons
-  ORIGINAL_TOPDIR="$TOPDIR"
-
-
   # We can only call BASIC_FIXUP_PATH after BASIC_CHECK_PATHS_WINDOWS.
 
   # Only process if variable expands to non-empty
@@ -16806,58 +16800,6 @@
   fi
 
 
-  # Calculate a canonical version of TOPDIR for string comparisons
-  CANONICAL_TOPDIR=$TOPDIR
-
-  if test "x$OPENJDK_BUILD_OS" != xwindows; then
-    # Follow a chain of symbolic links. Use readlink
-    # where it exists, else fall back to horribly
-    # complicated shell code.
-    if test "x$READLINK_TESTED" != yes; then
-      # On MacOSX there is a readlink tool with a different
-      # purpose than the GNU readlink tool. Check the found readlink.
-      ISGNU=`$READLINK --version 2>&1 | $GREP GNU`
-      if test "x$ISGNU" = x; then
-        # A readlink that we do not know how to use.
-        # Are there other non-GNU readlinks out there?
-        READLINK_TESTED=yes
-        READLINK=
-      fi
-    fi
-
-    if test "x$READLINK" != x; then
-      CANONICAL_TOPDIR=`$READLINK -f $CANONICAL_TOPDIR`
-    else
-      # Save the current directory for restoring afterwards
-      STARTDIR=$PWD
-      COUNTER=0
-      sym_link_dir=`$DIRNAME $CANONICAL_TOPDIR`
-      sym_link_file=`$BASENAME $CANONICAL_TOPDIR`
-      cd $sym_link_dir
-      # Use -P flag to resolve symlinks in directories.
-      cd `$THEPWDCMD -P`
-      sym_link_dir=`$THEPWDCMD -P`
-      # Resolve file symlinks
-      while test $COUNTER -lt 20; do
-        ISLINK=`$LS -l $sym_link_dir/$sym_link_file | $GREP '\->' | $SED -e 's/.*-> \(.*\)/\1/'`
-        if test "x$ISLINK" == x; then
-          # This is not a symbolic link! We are done!
-          break
-        fi
-        # Again resolve directory symlinks since the target of the just found
-        # link could be in a different directory
-        cd `$DIRNAME $ISLINK`
-        sym_link_dir=`$THEPWDCMD -P`
-        sym_link_file=`$BASENAME $ISLINK`
-        let COUNTER=COUNTER+1
-      done
-      cd $STARTDIR
-      CANONICAL_TOPDIR=$sym_link_dir/$sym_link_file
-    fi
-  fi
-
-
-
   # Locate the directory of this script.
   AUTOCONF_DIR=$TOPDIR/make/autoconf
 

--- a/make/autoconf/spec.gmk.in	Thu Oct 26 10:39:59 2017 +0200
+++ b/make/autoconf/spec.gmk.in	Thu Oct 26 13:20:47 2017 +0200
@@ -127,9 +127,6 @@
 
 # The top-level directory of the source repository
 TOPDIR:=@TOPDIR@
-# These two versions of TOPDIR are used in string comparisons
-ORIGINAL_TOPDIR:=@ORIGINAL_TOPDIR@
-CANONICAL_TOPDIR:=@CANONICAL_TOPDIR@
 
 
 IMPORT_MODULES_CLASSES:=@IMPORT_MODULES_CLASSES@