From c99a6eb01536d18e700a3c6935714a0fa0c96340 Mon Sep 17 00:00:00 2001
From: Martin Liska <mliska@suse.cz>
Date: Fri, 21 Jan 2022 17:10:07 +0100
Subject: Add mold detection for libs.

libatomic/ChangeLog:

	* acinclude.m4: Detect *_ld_is_mold and use it.
	* configure: Regenerate.

libgomp/ChangeLog:

	* acinclude.m4: Detect *_ld_is_mold and use it.
	* configure: Regenerate.

libitm/ChangeLog:

	* acinclude.m4: Detect *_ld_is_mold and use it.
	* configure: Regenerate.

libstdc++-v3/ChangeLog:

	* acinclude.m4: Detect *_ld_is_mold and use it.
	* configure: Regenerate.
---
 libstdc++-v3/acinclude.m4 | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

(limited to 'libstdc++-v3/acinclude.m4')

diff --git a/libstdc++-v3/acinclude.m4 b/libstdc++-v3/acinclude.m4
index a93252076b9..32638e6bfc5 100644
--- a/libstdc++-v3/acinclude.m4
+++ b/libstdc++-v3/acinclude.m4
@@ -172,6 +172,7 @@ dnl  LD (as a side effect of testing)
 dnl Sets:
 dnl  with_gnu_ld
 dnl  glibcxx_ld_is_gold (set to "no" or "yes")
+dnl  glibcxx_ld_is_mold (set to "no" or "yes")
 dnl  glibcxx_gnu_ld_version (possibly)
 dnl
 dnl The last will be a single integer, e.g., version 1.23.45.0.67.89 will
@@ -204,11 +205,14 @@ AC_DEFUN([GLIBCXX_CHECK_LINKER_FEATURES], [
   # Start by getting the version number.  I think the libtool test already
   # does some of this, but throws away the result.
   glibcxx_ld_is_gold=no
+  glibcxx_ld_is_mold=no
   if test x"$with_gnu_ld" = x"yes"; then
     AC_MSG_CHECKING([for ld version])
     changequote(,)
     if $LD --version 2>/dev/null | grep 'GNU gold' >/dev/null 2>&1; then
       glibcxx_ld_is_gold=yes
+    elif $LD --version 2>/dev/null | grep 'mold' >/dev/null 2>&1; then
+      glibcxx_ld_is_mold=yes
     fi
     ldver=`$LD --version 2>/dev/null |
 	   sed -e 's/[. ][0-9]\{8\}$//;s/.* \([^ ]\{1,\}\)$/\1/; q'`
@@ -220,7 +224,7 @@ AC_DEFUN([GLIBCXX_CHECK_LINKER_FEATURES], [
 
   # Set --gc-sections.
   glibcxx_have_gc_sections=no
-  if test "$glibcxx_ld_is_gold" = "yes"; then
+  if test "$glibcxx_ld_is_gold" = "yes" || test "$glibcxx_ld_is_mold" = "yes" ; then
     if $LD --help 2>/dev/null | grep gc-sections >/dev/null 2>&1; then
       glibcxx_have_gc_sections=yes
     fi
@@ -3796,6 +3800,8 @@ changequote([,])dnl
     enable_symvers=no
   elif test $glibcxx_ld_is_gold = yes ; then
     : All versions of gold support symbol versioning.
+  elif test $glibcxx_ld_is_mold = yes ; then
+    : All versions of mold support symbol versioning.
   elif test $glibcxx_gnu_ld_version -lt $glibcxx_min_gnu_ld_version ; then
     # The right tools, the right setup, but too old.  Fallbacks?
     AC_MSG_WARN(=== Linker version $glibcxx_gnu_ld_version is too old for)
-- 
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