* configure.ac (gcc_cv_lto_plugin): Determine lto plugin support

	from plugin linker.
	* configure: Regenerate.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@174426 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 35 insertions, 10 deletions

diff --git a/gcc/configure b/gcc/configure
index 0873e98212c..a3735188280 100755
--- a/gcc/configure
+++ b/gcc/configure
@@ -23206,14 +23206,38 @@ fi
 $as_echo_n "checking linker plugin support... " >&6; }
 gcc_cv_lto_plugin=0
 if test -f liblto_plugin.la; then
-  if test $in_tree_ld = yes -a x"$ORIGINAL_PLUGIN_LD_FOR_TARGET" = x"$gcc_cv_ld"; then
-    if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 21 -o "$gcc_cv_gld_major_version" -gt 2; then
-      gcc_cv_lto_plugin=2
-    elif test "$ld_is_gold" = yes -a "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -eq 20; then
-      gcc_cv_lto_plugin=1
+  save_ld_ver="$ld_ver"
+  save_ld_vers_major="$ld_vers_major"
+  save_ld_vers_minor="$ld_vers_minor"
+  save_ld_is_gold="$ld_is_gold"
+
+  ld_is_gold=no
 
+  if test $in_tree_ld = yes -a x"$ORIGINAL_PLUGIN_LD_FOR_TARGET" = x"$gcc_cv_ld"; then
+    ld_ver="GNU ld"
+    # FIXME: ld_is_gold?
+    ld_vers_major="$gcc_cv_gld_major_version"
+    ld_vers_minor="$gcc_cv_gld_minor_version"
+  else
+    # Determine plugin linker version.
+    # FIXME: Partial duplicate from above, generalize.
+    ld_ver=`$ORIGINAL_PLUGIN_LD_FOR_TARGET --version 2>/dev/null | sed 1q`
+    if echo "$ld_ver" | grep GNU > /dev/null; then
+      if echo "$ld_ver" | grep "GNU gold" > /dev/null; then
+        ld_is_gold=yes
+        ld_vers=`echo $ld_ver | sed -n \
+    	    -e 's,^[^)]*[	 ]\([0-9][0-9]*\.[0-9][0-9]*[^)]*\)) .*$,\1,p'`
+      else
+        ld_vers=`echo $ld_ver | sed -n \
+    	    -e 's,^.*[	 ]\([0-9][0-9]*\.[0-9][0-9]*.*\)$,\1,p'`
+      fi
+      ld_vers_major=`expr "$ld_vers" : '\([0-9]*\)'`
+      ld_vers_minor=`expr "$ld_vers" : '[0-9]*\.\([0-9]*\)'`
     fi
-  elif test x"$ORIGINAL_PLUGIN_LD_FOR_TARGET" = x"$gcc_cv_ld" && echo "$ld_ver" | grep GNU > /dev/null; then
+  fi
+
+  # Determine plugin support.
+  if echo "$ld_ver" | grep GNU > /dev/null; then
     # Require GNU ld or gold 2.21+ for plugin support by default.
     if test "$ld_vers_major" -eq 2 -a "$ld_vers_minor" -ge 21; then
       gcc_cv_lto_plugin=2
@@ -23221,11 +23245,12 @@ if test -f liblto_plugin.la; then
     elif test "$ld_is_gold" = yes -a "$ld_vers_major" -eq 2 -a "$ld_vers_minor" -eq 20; then
       gcc_cv_lto_plugin=1
     fi
-  elif test x"$ORIGINAL_PLUGIN_LD_FOR_TARGET" != x"$gcc_cv_ld"; then
-    # Allow -fuse-linker-plugin if plugin linker differs from
-    # default/specified linker.
-    gcc_cv_lto_plugin=1
   fi
+
+  ld_ver="$save_ld_ver"
+  ld_vers_major="$save_ld_vers_major"
+  ld_vers_minor="$save_ld_vers_minor"
+  ld_is_gold="$save_ld_is_gold"
 fi
 
 cat >>confdefs.h <<_ACEOF