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-rw-r--r--config/ld-symbolic.m445
1 files changed, 45 insertions, 0 deletions
diff --git a/config/ld-symbolic.m4 b/config/ld-symbolic.m4
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+++ b/config/ld-symbolic.m4
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+dnl Copyright (C) 2007 Free Software Foundation, Inc.
+dnl This file is free software, distributed under the terms of the GNU
+dnl General Public License. As a special exception to the GNU General
+dnl Public License, this file may be distributed as part of a program
+dnl that contains a configuration script generated by Autoconf, under
+dnl the same distribution terms as the rest of that program.
+
+dnl Set SYMBOLIC_LDFLAGS to -Bsymbolic-functions for GNU linker if it
+dnl is supported.
+AC_DEFUN([ACX_PROG_LD_GNU_SYMBOLIC],
+[AC_CACHE_CHECK([if the GNU linker ($LD) supports -Bsymbolic-functions],
+acl_cv_prog_gnu_ld_symbolic, [
+acl_cv_prog_gnu_ld_symbolic=no
+AC_REQUIRE([AC_LIB_PROG_LD_GNU])
+if test x"$with_gnu_ld" = x"yes"; then
+ if $LD --help 2>&1 </dev/null | grep Bsymbolic-functions 1>&5; then
+ acl_cv_prog_gnu_ld_symbolic=yes
+ fi
+fi])
+if test x"$acl_cv_prog_gnu_ld_symbolic" = x"yes"; then
+ SYMBOLIC_LDFLAGS="-Wl,-Bsymbolic-functions"
+else
+ SYMBOLIC_LDFLAGS=''
+fi
+])
+
+dnl Set DYNAMIC_LIST_CPP_NEW_LDFLAGS to --dynamic-list-cpp-new for GNU
+dnl linker if it is supported.
+AC_DEFUN([ACX_PROG_LD_GNU_DYNAMIC_LIST_CPP_NEW],
+[AC_CACHE_CHECK([if the GNU linker ($LD) supports --dynamic-list-cpp-new],
+acl_cv_prog_gnu_ld_dynamic_list_cpp_new, [
+acl_cv_prog_gnu_ld_dynamic_list_cpp_new=no
+AC_REQUIRE([ACX_PROG_LD_GNU_SYMBOLIC])
+if test x"$with_gnu_ld" = x"yes" -a \
+ x"$acl_cv_prog_gnu_ld_symbolic" = x"yes"; then
+ if $LD --help 2>&1 </dev/null | grep dynamic-list-cpp-new 1>&5; then
+ acl_cv_prog_gnu_ld_dynamic_list_cpp_new=yes
+ fi
+fi])
+if test x"$acl_cv_prog_gnu_ld_dynamic_list_cpp_new" = x"yes"; then
+ DYNAMIC_LIST_CPP_NEW_LDFLAGS="$SYMBOLIC_LDFLAGS -Wl,--dynamic-list-cpp-new"
+else
+ DYNAMIC_LIST_CPP_NEW_LDFLAGS=''
+fi
+])