--- a/common/autoconf/generated-configure.sh	Tue Feb 21 13:47:27 2017 +0100
+++ b/common/autoconf/generated-configure.sh	Thu Feb 23 16:38:37 2017 +0100
@@ -5043,7 +5043,7 @@
 #
 # $1 = compiler to test (CC or CXX)
 # $2 = human readable name of compiler (C or C++)
-# $3 = list of compiler names to search for
+# $3 = compiler name to search for
 
 
 # Detect the core components of the toolchain, i.e. the compilers (CC and CXX),
@@ -5170,7 +5170,7 @@
 #CUSTOM_AUTOCONF_INCLUDE
 
 # Do not change or remove the following line, it is needed for consistency checks:
-DATE_WHEN_GENERATED=1486679715
+DATE_WHEN_GENERATED=1487864263
 
 ###############################################################################
 #
@@ -33138,10 +33138,9 @@
     if test -n "$TOOLCHAIN_PATH"; then
       PATH_save="$PATH"
       PATH="$TOOLCHAIN_PATH"
-      for ac_prog in $SEARCH_LIST
-do
-  # Extract the first word of "$ac_prog", so it can be a program name with args.
-set dummy $ac_prog; ac_word=$2
+      if test -n "$ac_tool_prefix"; then
+  # Extract the first word of "${ac_tool_prefix}$SEARCH_LIST", so it can be a program name with args.
+set dummy ${ac_tool_prefix}$SEARCH_LIST; 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_TOOLCHAIN_PATH_CC+:} false; then :
@@ -33180,20 +33179,73 @@
 fi
 
 
-  test -n "$TOOLCHAIN_PATH_CC" && break
-done
+fi
+if test -z "$ac_cv_path_TOOLCHAIN_PATH_CC"; then
+  ac_pt_TOOLCHAIN_PATH_CC=$TOOLCHAIN_PATH_CC
+  # Extract the first word of "$SEARCH_LIST", so it can be a program name with args.
+set dummy $SEARCH_LIST; 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_ac_pt_TOOLCHAIN_PATH_CC+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $ac_pt_TOOLCHAIN_PATH_CC in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_ac_pt_TOOLCHAIN_PATH_CC="$ac_pt_TOOLCHAIN_PATH_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_ac_pt_TOOLCHAIN_PATH_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
+ac_pt_TOOLCHAIN_PATH_CC=$ac_cv_path_ac_pt_TOOLCHAIN_PATH_CC
+if test -n "$ac_pt_TOOLCHAIN_PATH_CC"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_pt_TOOLCHAIN_PATH_CC" >&5
+$as_echo "$ac_pt_TOOLCHAIN_PATH_CC" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+  if test "x$ac_pt_TOOLCHAIN_PATH_CC" = x; then
+    TOOLCHAIN_PATH_CC=""
+  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
+    TOOLCHAIN_PATH_CC=$ac_pt_TOOLCHAIN_PATH_CC
+  fi
+else
+  TOOLCHAIN_PATH_CC="$ac_cv_path_TOOLCHAIN_PATH_CC"
+fi
 
       CC=$TOOLCHAIN_PATH_CC
       PATH="$PATH_save"
     fi
 
-    # AC_PATH_PROGS can't be run multiple times with the same variable,
+    # AC_PATH_TOOL can't be run multiple times with the same variable,
     # so create a new name for this run.
     if test "x$CC" = x; then
-      for ac_prog in $SEARCH_LIST
-do
-  # Extract the first word of "$ac_prog", so it can be a program name with args.
-set dummy $ac_prog; ac_word=$2
+      if test -n "$ac_tool_prefix"; then
+  # Extract the first word of "${ac_tool_prefix}$SEARCH_LIST", so it can be a program name with args.
+set dummy ${ac_tool_prefix}$SEARCH_LIST; 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_POTENTIAL_CC+:} false; then :
@@ -33232,8 +33284,62 @@
 fi
 
 
-  test -n "$POTENTIAL_CC" && break
-done
+fi
+if test -z "$ac_cv_path_POTENTIAL_CC"; then
+  ac_pt_POTENTIAL_CC=$POTENTIAL_CC
+  # Extract the first word of "$SEARCH_LIST", so it can be a program name with args.
+set dummy $SEARCH_LIST; 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_ac_pt_POTENTIAL_CC+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $ac_pt_POTENTIAL_CC in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_ac_pt_POTENTIAL_CC="$ac_pt_POTENTIAL_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_ac_pt_POTENTIAL_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
+ac_pt_POTENTIAL_CC=$ac_cv_path_ac_pt_POTENTIAL_CC
+if test -n "$ac_pt_POTENTIAL_CC"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_pt_POTENTIAL_CC" >&5
+$as_echo "$ac_pt_POTENTIAL_CC" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+  if test "x$ac_pt_POTENTIAL_CC" = x; then
+    POTENTIAL_CC=""
+  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
+    POTENTIAL_CC=$ac_pt_POTENTIAL_CC
+  fi
+else
+  POTENTIAL_CC="$ac_cv_path_POTENTIAL_CC"
+fi
 
       CC=$POTENTIAL_CC
     fi
@@ -34439,10 +34545,9 @@
     if test -n "$TOOLCHAIN_PATH"; then
       PATH_save="$PATH"
       PATH="$TOOLCHAIN_PATH"
-      for ac_prog in $SEARCH_LIST
-do
-  # Extract the first word of "$ac_prog", so it can be a program name with args.
-set dummy $ac_prog; ac_word=$2
+      if test -n "$ac_tool_prefix"; then
+  # Extract the first word of "${ac_tool_prefix}$SEARCH_LIST", so it can be a program name with args.
+set dummy ${ac_tool_prefix}$SEARCH_LIST; 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_TOOLCHAIN_PATH_CXX+:} false; then :
@@ -34481,20 +34586,73 @@
 fi
 
 
-  test -n "$TOOLCHAIN_PATH_CXX" && break
-done
+fi
+if test -z "$ac_cv_path_TOOLCHAIN_PATH_CXX"; then
+  ac_pt_TOOLCHAIN_PATH_CXX=$TOOLCHAIN_PATH_CXX
+  # Extract the first word of "$SEARCH_LIST", so it can be a program name with args.
+set dummy $SEARCH_LIST; 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_ac_pt_TOOLCHAIN_PATH_CXX+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $ac_pt_TOOLCHAIN_PATH_CXX in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_ac_pt_TOOLCHAIN_PATH_CXX="$ac_pt_TOOLCHAIN_PATH_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_ac_pt_TOOLCHAIN_PATH_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
+ac_pt_TOOLCHAIN_PATH_CXX=$ac_cv_path_ac_pt_TOOLCHAIN_PATH_CXX
+if test -n "$ac_pt_TOOLCHAIN_PATH_CXX"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_pt_TOOLCHAIN_PATH_CXX" >&5
+$as_echo "$ac_pt_TOOLCHAIN_PATH_CXX" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+  if test "x$ac_pt_TOOLCHAIN_PATH_CXX" = x; then
+    TOOLCHAIN_PATH_CXX=""
+  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
+    TOOLCHAIN_PATH_CXX=$ac_pt_TOOLCHAIN_PATH_CXX
+  fi
+else
+  TOOLCHAIN_PATH_CXX="$ac_cv_path_TOOLCHAIN_PATH_CXX"
+fi
 
       CXX=$TOOLCHAIN_PATH_CXX
       PATH="$PATH_save"
     fi
 
-    # AC_PATH_PROGS can't be run multiple times with the same variable,
+    # AC_PATH_TOOL can't be run multiple times with the same variable,
     # so create a new name for this run.
     if test "x$CXX" = x; then
-      for ac_prog in $SEARCH_LIST
-do
-  # Extract the first word of "$ac_prog", so it can be a program name with args.
-set dummy $ac_prog; ac_word=$2
+      if test -n "$ac_tool_prefix"; then
+  # Extract the first word of "${ac_tool_prefix}$SEARCH_LIST", so it can be a program name with args.
+set dummy ${ac_tool_prefix}$SEARCH_LIST; 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_POTENTIAL_CXX+:} false; then :
@@ -34533,8 +34691,62 @@
 fi
 
 
-  test -n "$POTENTIAL_CXX" && break
-done
+fi
+if test -z "$ac_cv_path_POTENTIAL_CXX"; then
+  ac_pt_POTENTIAL_CXX=$POTENTIAL_CXX
+  # Extract the first word of "$SEARCH_LIST", so it can be a program name with args.
+set dummy $SEARCH_LIST; 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_ac_pt_POTENTIAL_CXX+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $ac_pt_POTENTIAL_CXX in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_ac_pt_POTENTIAL_CXX="$ac_pt_POTENTIAL_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_ac_pt_POTENTIAL_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
+ac_pt_POTENTIAL_CXX=$ac_cv_path_ac_pt_POTENTIAL_CXX
+if test -n "$ac_pt_POTENTIAL_CXX"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_pt_POTENTIAL_CXX" >&5
+$as_echo "$ac_pt_POTENTIAL_CXX" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+  if test "x$ac_pt_POTENTIAL_CXX" = x; then
+    POTENTIAL_CXX=""
+  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
+    POTENTIAL_CXX=$ac_pt_POTENTIAL_CXX
+  fi
+else
+  POTENTIAL_CXX="$ac_cv_path_POTENTIAL_CXX"
+fi
 
       CXX=$POTENTIAL_CXX
     fi

--- a/common/autoconf/toolchain.m4	Tue Feb 21 13:47:27 2017 +0100
+++ b/common/autoconf/toolchain.m4	Thu Feb 23 16:38:37 2017 +0100
@@ -440,7 +440,7 @@
 #
 # $1 = compiler to test (CC or CXX)
 # $2 = human readable name of compiler (C or C++)
-# $3 = list of compiler names to search for
+# $3 = compiler name to search for
 AC_DEFUN([TOOLCHAIN_FIND_COMPILER],
 [
   COMPILER_NAME=$2
@@ -482,15 +482,15 @@
     if test -n "$TOOLCHAIN_PATH"; then
       PATH_save="$PATH"
       PATH="$TOOLCHAIN_PATH"
-      AC_PATH_PROGS(TOOLCHAIN_PATH_$1, $SEARCH_LIST)
+      AC_PATH_TOOL(TOOLCHAIN_PATH_$1, $SEARCH_LIST)
       $1=$TOOLCHAIN_PATH_$1
       PATH="$PATH_save"
     fi
 
-    # AC_PATH_PROGS can't be run multiple times with the same variable,
+    # AC_PATH_TOOL can't be run multiple times with the same variable,
     # so create a new name for this run.
     if test "x[$]$1" = x; then
-      AC_PATH_PROGS(POTENTIAL_$1, $SEARCH_LIST)
+      AC_PATH_TOOL(POTENTIAL_$1, $SEARCH_LIST)
       $1=$POTENTIAL_$1
     fi