diff options
Diffstat (limited to 'gcc/configure.ac')
| -rw-r--r-- | gcc/configure.ac | 60 |
1 files changed, 60 insertions, 0 deletions
diff --git a/gcc/configure.ac b/gcc/configure.ac index 140b9f9ac90..998499ed82d 100644 --- a/gcc/configure.ac +++ b/gcc/configure.ac @@ -274,6 +274,11 @@ AC_ARG_WITH(gnu-ld, gnu_ld_flag="$with_gnu_ld", gnu_ld_flag=no) +case $target in + *darwin*) ld64_flag=yes;; # Darwin can only use a ld64-compatible linker. + *) ld64_flag=no;; +esac + # With pre-defined ld AC_ARG_WITH(ld, [AS_HELP_STRING([--with-ld], [arrange to use the specified ld (full pathname)])], @@ -283,6 +288,8 @@ if test x"${DEFAULT_LINKER+set}" = x"set"; then AC_MSG_ERROR([cannot execute: $DEFAULT_LINKER: check --with-ld or env. var. DEFAULT_LINKER]) elif $DEFAULT_LINKER -v < /dev/null 2>&1 | grep GNU > /dev/null; then gnu_ld_flag=yes + elif $DEFAULT_LINKER -v < /dev/null 2>&1 | grep ld64- > /dev/null; then + ld64_flag=yes fi AC_DEFINE_UNQUOTED(DEFAULT_LINKER,"$DEFAULT_LINKER", [Define to enable the use of a default linker.]) @@ -5266,6 +5273,59 @@ AC_DEFINE_UNQUOTED(LD_COMPRESS_DEBUG_OPTION, "$gcc_cv_ld_compress_debug_option", [Define to the linker option to enable compressed debug sections.]) AC_MSG_RESULT($gcc_cv_ld_compress_debug) +if test x"$ld64_flag" = x"yes"; then + + # Set defaults for possibly untestable items. + gcc_cv_ld64_export_dynamic=0 + + if test "$build" = "$host"; then + darwin_try_test=1 + else + darwin_try_test=0 + fi + + # On Darwin, because of FAT library support, it is often possible to execute + # exes from compatible archs even when the host differs from the build system. + case "$build","$host" in + x86_64-*-darwin*,i?86-*-darwin* | powerpc64*-*-darwin*,powerpc*-*-darwin*) + darwin_try_test=1;; + *) ;; + esac + + # If the configurer specified a minimum ld64 version to be supported, then use + # that to determine feature support. + if test x"${gcc_cv_ld64_version}" != x; then + AC_MSG_CHECKING(ld64 major version) + IFS=. read gcc_cv_ld64_major gcc_cv_ld64_minor <<< "${gcc_cv_ld64_version}" + AC_MSG_RESULT($gcc_cv_ld64_major) + if test "$gcc_cv_ld64_major" -ge 236; then + gcc_cv_ld64_export_dynamic=1 + fi + elif test -x "$gcc_cv_ld" -a "$darwin_try_test" -eq 1; then + # If the version was not specified, try to find it. + AC_MSG_CHECKING(linker version) + if test x"${gcc_cv_ld64_version}" = x; then + gcc_cv_ld64_version=`$gcc_cv_ld -v 2>&1 | grep ld64 | sed s/.*ld64-// | awk '{print $1}'` + fi + AC_MSG_RESULT($gcc_cv_ld64_version) + + AC_MSG_CHECKING(linker for -export_dynamic support) + gcc_cv_ld64_export_dynamic=1 + if $gcc_cv_ld -export_dynamic < /dev/null 2>&1 | grep 'unknown option' > /dev/null; then + gcc_cv_ld64_export_dynamic=0 + fi + AC_MSG_RESULT($gcc_cv_ld64_export_dynamic) + fi + + if test x"${gcc_cv_ld64_version}" != x; then + AC_DEFINE_UNQUOTED(LD64_VERSION, "${gcc_cv_ld64_version}", + [Define to ld64 version.]) + fi + + AC_DEFINE_UNQUOTED(LD64_HAS_EXPORT_DYNAMIC, $gcc_cv_ld64_export_dynamic, + [Define to 1 if ld64 supports '-export_dynamic'.]) +fi + # -------- # UNSORTED # -------- |