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.

diff --git a/libatomic/acinclude.m4 b/libatomic/acinclude.m4
index 3703a43..f35ab5b 100644 (file)
--- a/libatomic/acinclude.m4
+++ b/libatomic/acinclude.m4
@@ -299,6 +299,7 @@ dnl  LD (as a side effect of testing)
 dnl Sets:
 dnl  with_gnu_ld
 dnl  libat_ld_is_gold (possibly)
+dnl  libat_ld_is_mold (possibly)
 dnl  libat_gnu_ld_version (possibly)
 dnl
 dnl The last will be a single integer, e.g., version 1.23.45.0.67.89 will
@@ -331,8 +332,11 @@ AC_DEFUN([LIBAT_CHECK_LINKER_FEATURES], [
   # Start by getting the version number.  I think the libtool test already
   # does some of this, but throws away the result.
   libat_ld_is_gold=no
+  libat_ld_is_mold=no
   if $LD --version 2>/dev/null | grep 'GNU gold'> /dev/null 2>&1; then
     libat_ld_is_gold=yes
+  elif $LD --version 2>/dev/null | grep 'mold' >/dev/null 2>&1; then
+    libat_ld_is_mold=yes
   fi
   changequote(,)
   ldver=`$LD --version 2>/dev/null |
@@ -488,6 +492,8 @@ if test $enable_symvers != no && test $libat_shared_libgcc = yes; then
       enable_symvers=gnu
     elif test $libat_ld_is_gold = yes ; then
       enable_symvers=gnu
+    elif test $libat_ld_is_mold = yes ; then
+      enable_symvers=gnu
     else
       # The right tools, the right setup, but too old.  Fallbacks?
       AC_MSG_WARN(=== Linker version $libat_gnu_ld_version is too old for)

diff --git a/libatomic/configure b/libatomic/configure
index fb920c9..34434d2 100755 (executable)
--- a/libatomic/configure
+++ b/libatomic/configure
@@ -15197,8 +15197,11 @@ with_gnu_ld=$lt_cv_prog_gnu_ld
   # Start by getting the version number.  I think the libtool test already
   # does some of this, but throws away the result.
   libat_ld_is_gold=no
+  libat_ld_is_mold=no
   if $LD --version 2>/dev/null | grep 'GNU gold'> /dev/null 2>&1; then
     libat_ld_is_gold=yes
+  elif $LD --version 2>/dev/null | grep 'mold' >/dev/null 2>&1; then
+    libat_ld_is_mold=yes
   fi
 
   ldver=`$LD --version 2>/dev/null |
@@ -15401,6 +15404,8 @@ if test $enable_symvers != no && test $libat_shared_libgcc = yes; then
       enable_symvers=gnu
     elif test $libat_ld_is_gold = yes ; then
       enable_symvers=gnu
+    elif test $libat_ld_is_mold = yes ; then
+      enable_symvers=gnu
     else
       # The right tools, the right setup, but too old.  Fallbacks?
       { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: === Linker version $libat_gnu_ld_version is too old for" >&5

diff --git a/libgomp/acinclude.m4 b/libgomp/acinclude.m4
index dbf54d0..b8154eb 100644 (file)
--- a/libgomp/acinclude.m4
+++ b/libgomp/acinclude.m4
@@ -117,6 +117,7 @@ dnl  LD (as a side effect of testing)
 dnl Sets:
 dnl  with_gnu_ld
 dnl  libgomp_ld_is_gold (possibly)
+dnl  libgomp_ld_is_mold (possibly)
 dnl  libgomp_gnu_ld_version (possibly)
 dnl
 dnl The last will be a single integer, e.g., version 1.23.45.0.67.89 will
@@ -149,8 +150,11 @@ AC_DEFUN([LIBGOMP_CHECK_LINKER_FEATURES], [
   # Start by getting the version number.  I think the libtool test already
   # does some of this, but throws away the result.
   libgomp_ld_is_gold=no
+  libgomp_ld_is_mold=no
   if $LD --version 2>/dev/null | grep 'GNU gold'> /dev/null 2>&1; then
     libgomp_ld_is_gold=yes
+  elif $LD --version 2>/dev/null | grep 'mold'> /dev/null 2>&1; then
+    libat_ld_is_mold=yes
   fi
   changequote(,)
   ldver=`$LD --version 2>/dev/null |
@@ -306,6 +310,8 @@ if test $enable_symvers != no && test $libgomp_shared_libgcc = yes; then
       enable_symvers=gnu
     elif test $libgomp_ld_is_gold = yes ; then
       enable_symvers=gnu
+    elif test $libgomp_ld_is_mold = yes ; then
+      enable_symvers=gnu
     else
       # The right tools, the right setup, but too old.  Fallbacks?
       AC_MSG_WARN(=== Linker version $libgomp_gnu_ld_version is too old for)

diff --git a/libgomp/configure b/libgomp/configure
index 4bc9b38..37390ce 100755 (executable)
--- a/libgomp/configure
+++ b/libgomp/configure
@@ -15037,7 +15037,7 @@ _ACEOF
 
 # Plugins for offload execution, configure.ac fragment.  -*- mode: autoconf -*-
 #
-# Copyright (C) 2014-2021 Free Software Foundation, Inc.
+# Copyright (C) 2014-2022 Free Software Foundation, Inc.
 #
 # Contributed by Mentor Embedded.
 #
@@ -16231,8 +16231,11 @@ with_gnu_ld=$lt_cv_prog_gnu_ld
   # Start by getting the version number.  I think the libtool test already
   # does some of this, but throws away the result.
   libgomp_ld_is_gold=no
+  libgomp_ld_is_mold=no
   if $LD --version 2>/dev/null | grep 'GNU gold'> /dev/null 2>&1; then
     libgomp_ld_is_gold=yes
+  elif $LD --version 2>/dev/null | grep 'mold'> /dev/null 2>&1; then
+    libat_ld_is_mold=yes
   fi
 
   ldver=`$LD --version 2>/dev/null |
@@ -16435,6 +16438,8 @@ if test $enable_symvers != no && test $libgomp_shared_libgcc = yes; then
       enable_symvers=gnu
     elif test $libgomp_ld_is_gold = yes ; then
       enable_symvers=gnu
+    elif test $libgomp_ld_is_mold = yes ; then
+      enable_symvers=gnu
     else
       # The right tools, the right setup, but too old.  Fallbacks?
       { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: === Linker version $libgomp_gnu_ld_version is too old for" >&5

diff --git a/libitm/acinclude.m4 b/libitm/acinclude.m4
index 8efbee9..9fd12e6 100644 (file)
--- a/libitm/acinclude.m4
+++ b/libitm/acinclude.m4
@@ -210,6 +210,7 @@ dnl  LD (as a side effect of testing)
 dnl Sets:
 dnl  with_gnu_ld
 dnl  libitm_ld_is_gold (possibly)
+dnl  libitm_ld_is_mold (possibly)
 dnl  libitm_gnu_ld_version (possibly)
 dnl
 dnl The last will be a single integer, e.g., version 1.23.45.0.67.89 will
@@ -242,8 +243,11 @@ AC_DEFUN([LIBITM_CHECK_LINKER_FEATURES], [
   # Start by getting the version number.  I think the libtool test already
   # does some of this, but throws away the result.
   libitm_ld_is_gold=no
+  libitm_ld_is_mold=no
   if $LD --version 2>/dev/null | grep 'GNU gold'> /dev/null 2>&1; then
     libitm_ld_is_gold=yes
+  elif $LD --version 2>/dev/null | grep 'mold' >/dev/null 2>&1; then
+    libitm_ld_is_mold=yes
   fi
   changequote(,)
   ldver=`$LD --version 2>/dev/null |
@@ -399,6 +403,8 @@ if test $enable_symvers != no && test $libitm_shared_libgcc = yes; then
       enable_symvers=gnu
     elif test $libitm_ld_is_gold = yes ; then
       enable_symvers=gnu
+    elif test $libitm_ld_is_mold = yes ; then
+      enable_symvers=gnu
     else
       # The right tools, the right setup, but too old.  Fallbacks?
       AC_MSG_WARN(=== Linker version $libitm_gnu_ld_version is too old for)

diff --git a/libitm/configure b/libitm/configure
index b8f1e23..966bf40 100755 (executable)
--- a/libitm/configure
+++ b/libitm/configure
@@ -12056,7 +12056,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<_LT_EOF
-#line 12069 "configure"
+#line 12059 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -12162,7 +12162,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<_LT_EOF
-#line 12175 "configure"
+#line 12165 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -14901,16 +14901,6 @@ freebsd* | dragonfly*)
   esac
   ;;
 
-gnu*)
-  version_type=linux
-  need_lib_prefix=no
-  need_version=no
-  library_names_spec='${libname}${release}${shared_ext}$versuffix ${libname}${release}${shared_ext}${major} ${libname}${shared_ext}'
-  soname_spec='${libname}${release}${shared_ext}$major'
-  shlibpath_var=LD_LIBRARY_PATH
-  hardcode_into_libs=yes
-  ;;
-
 haiku*)
   version_type=linux
   need_lib_prefix=no
@@ -15032,7 +15022,7 @@ linux*oldld* | linux*aout* | linux*coff*)
 # project, but have not yet been accepted: they are GCC-local changes
 # for the time being.  (See
 # https://lists.gnu.org/archive/html/libtool-patches/2018-05/msg00000.html)
-linux* | k*bsd*-gnu | kopensolaris*-gnu | uclinuxfdpiceabi)
+linux* | k*bsd*-gnu | kopensolaris*-gnu | gnu* | uclinuxfdpiceabi)
   version_type=linux
   need_lib_prefix=no
   need_version=no
@@ -17085,8 +17075,11 @@ fi
   # Start by getting the version number.  I think the libtool test already
   # does some of this, but throws away the result.
   libitm_ld_is_gold=no
+  libitm_ld_is_mold=no
   if $LD --version 2>/dev/null | grep 'GNU gold'> /dev/null 2>&1; then
     libitm_ld_is_gold=yes
+  elif $LD --version 2>/dev/null | grep 'mold' >/dev/null 2>&1; then
+    libitm_ld_is_mold=yes
   fi
 
   ldver=`$LD --version 2>/dev/null |
@@ -17289,6 +17282,8 @@ if test $enable_symvers != no && test $libitm_shared_libgcc = yes; then
       enable_symvers=gnu
     elif test $libitm_ld_is_gold = yes ; then
       enable_symvers=gnu
+    elif test $libitm_ld_is_mold = yes ; then
+      enable_symvers=gnu
     else
       # The right tools, the right setup, but too old.  Fallbacks?
       { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: === Linker version $libitm_gnu_ld_version is too old for" >&5
@@ -17882,7 +17877,7 @@ case "$host" in
     case "$enable_cet" in
       auto)
        # Check if target supports multi-byte NOPs
-       # and if assembler supports CET insn.
+       # and if compiler and assembler support CET insn.
        cet_save_CFLAGS="$CFLAGS"
        CFLAGS="$CFLAGS -fcf-protection"
        cat confdefs.h - <<_ACEOF >conftest.$ac_ext

diff --git a/libstdc++-v3/acinclude.m4 b/libstdc++-v3/acinclude.m4
index a932520..32638e6 100644 (file)
--- 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)

diff --git a/libstdc++-v3/configure b/libstdc++-v3/configure
index 2b2f857..de6eb1c 100755 (executable)
--- a/libstdc++-v3/configure
+++ b/libstdc++-v3/configure
@@ -22157,12 +22157,15 @@ with_gnu_ld=$lt_cv_prog_gnu_ld
   # Start by getting the version number.  I think the libtool test already
   # does some of this, but throws away the result.
   glibcxx_ld_is_gold=no
+  glibcxx_ld_is_mold=no
   if test x"$with_gnu_ld" = x"yes"; then
     { $as_echo "$as_me:${as_lineno-$LINENO}: checking for ld version" >&5
 $as_echo_n "checking for ld version... " >&6; }
 
     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'`
@@ -22175,7 +22178,7 @@ $as_echo "$glibcxx_gnu_ld_version" >&6; }
 
   # 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 $LD --help 2>/dev/null | grep gc-sections >/dev/null 2>&1; then
       glibcxx_have_gc_sections=yes
     fi
@@ -29371,12 +29374,15 @@ ac_compiler_gnu=$ac_cv_c_compiler_gnu
   # 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
     { $as_echo "$as_me:${as_lineno-$LINENO}: checking for ld version" >&5
 $as_echo_n "checking for ld version... " >&6; }
 
     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'`
@@ -29389,7 +29395,7 @@ $as_echo "$glibcxx_gnu_ld_version" >&6; }
 
   # 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 $LD --help 2>/dev/null | grep gc-sections >/dev/null 2>&1; then
       glibcxx_have_gc_sections=yes
     fi
@@ -35303,12 +35309,15 @@ done
   # Start by getting the version number.  I think the libtool test already
   # does some of this, but throws away the result.
   glibcxx_ld_is_gold=no
+  glibcxx_ld_is_mold=no
   if test x"$with_gnu_ld" = x"yes"; then
     { $as_echo "$as_me:${as_lineno-$LINENO}: checking for ld version" >&5
 $as_echo_n "checking for ld version... " >&6; }
 
     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'`
@@ -35321,7 +35330,7 @@ $as_echo "$glibcxx_gnu_ld_version" >&6; }
 
   # 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 $LD --help 2>/dev/null | grep gc-sections >/dev/null 2>&1; then
       glibcxx_have_gc_sections=yes
     fi
@@ -47234,12 +47243,15 @@ done
   # Start by getting the version number.  I think the libtool test already
   # does some of this, but throws away the result.
   glibcxx_ld_is_gold=no
+  glibcxx_ld_is_mold=no
   if test x"$with_gnu_ld" = x"yes"; then
     { $as_echo "$as_me:${as_lineno-$LINENO}: checking for ld version" >&5
 $as_echo_n "checking for ld version... " >&6; }
 
     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'`
@@ -47252,7 +47264,7 @@ $as_echo "$glibcxx_gnu_ld_version" >&6; }
 
   # 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 $LD --help 2>/dev/null | grep gc-sections >/dev/null 2>&1; then
       glibcxx_have_gc_sections=yes
     fi
@@ -47519,12 +47531,15 @@ done
   # Start by getting the version number.  I think the libtool test already
   # does some of this, but throws away the result.
   glibcxx_ld_is_gold=no
+  glibcxx_ld_is_mold=no
   if test x"$with_gnu_ld" = x"yes"; then
     { $as_echo "$as_me:${as_lineno-$LINENO}: checking for ld version" >&5
 $as_echo_n "checking for ld version... " >&6; }
 
     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'`
@@ -47537,7 +47552,7 @@ $as_echo "$glibcxx_gnu_ld_version" >&6; }
 
   # 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 $LD --help 2>/dev/null | grep gc-sections >/dev/null 2>&1; then
       glibcxx_have_gc_sections=yes
     fi
@@ -47995,12 +48010,15 @@ ac_compiler_gnu=$ac_cv_c_compiler_gnu
   # 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
     { $as_echo "$as_me:${as_lineno-$LINENO}: checking for ld version" >&5
 $as_echo_n "checking for ld version... " >&6; }
 
     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'`
@@ -48013,7 +48031,7 @@ $as_echo "$glibcxx_gnu_ld_version" >&6; }
 
   # 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 $LD --help 2>/dev/null | grep gc-sections >/dev/null 2>&1; then
       glibcxx_have_gc_sections=yes
     fi
@@ -54383,12 +54401,15 @@ _ACEOF
   # Start by getting the version number.  I think the libtool test already
   # does some of this, but throws away the result.
   glibcxx_ld_is_gold=no
+  glibcxx_ld_is_mold=no
   if test x"$with_gnu_ld" = x"yes"; then
     { $as_echo "$as_me:${as_lineno-$LINENO}: checking for ld version" >&5
 $as_echo_n "checking for ld version... " >&6; }
 
     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'`
@@ -54401,7 +54422,7 @@ $as_echo "$glibcxx_gnu_ld_version" >&6; }
 
   # 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
@@ -60531,12 +60552,15 @@ $as_echo "#define HAVE_TLS 1" >>confdefs.h
   # Start by getting the version number.  I think the libtool test already
   # does some of this, but throws away the result.
   glibcxx_ld_is_gold=no
+  glibcxx_ld_is_mold=no
   if test x"$with_gnu_ld" = x"yes"; then
     { $as_echo "$as_me:${as_lineno-$LINENO}: checking for ld version" >&5
 $as_echo_n "checking for ld version... " >&6; }
 
     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'`
@@ -60549,7 +60573,7 @@ $as_echo "$glibcxx_gnu_ld_version" >&6; }
 
   # 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 $LD --help 2>/dev/null | grep gc-sections >/dev/null 2>&1; then
       glibcxx_have_gc_sections=yes
     fi
@@ -60741,12 +60765,15 @@ done
   # Start by getting the version number.  I think the libtool test already
   # does some of this, but throws away the result.
   glibcxx_ld_is_gold=no
+  glibcxx_ld_is_mold=no
   if test x"$with_gnu_ld" = x"yes"; then
     { $as_echo "$as_me:${as_lineno-$LINENO}: checking for ld version" >&5
 $as_echo_n "checking for ld version... " >&6; }
 
     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'`
@@ -60759,7 +60786,7 @@ $as_echo "$glibcxx_gnu_ld_version" >&6; }
 
   # 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 $LD --help 2>/dev/null | grep gc-sections >/dev/null 2>&1; then
       glibcxx_have_gc_sections=yes
     fi
@@ -60970,12 +60997,15 @@ ac_compiler_gnu=$ac_cv_c_compiler_gnu
   # 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
     { $as_echo "$as_me:${as_lineno-$LINENO}: checking for ld version" >&5
 $as_echo_n "checking for ld version... " >&6; }
 
     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'`
@@ -60988,7 +61018,7 @@ $as_echo "$glibcxx_gnu_ld_version" >&6; }
 
   # 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
@@ -74929,6 +74959,8 @@ $as_echo "$as_me: WARNING: === Symbol versioning will be disabled." >&2;}
     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?
     { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: === Linker version $glibcxx_gnu_ld_version is too old for" >&5