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Diffstat (limited to 'm4/gcc4_visibility.m4')
| -rw-r--r-- | m4/gcc4_visibility.m4 | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/m4/gcc4_visibility.m4 b/m4/gcc4_visibility.m4 index 708d42b..e58a0d7 100644 --- a/m4/gcc4_visibility.m4 +++ b/m4/gcc4_visibility.m4 @@ -19,3 +19,24 @@ AC_DEFUN([CHECK_GCC_FVISIBILITY], [ CFLAGS="$saved_CFLAGS" AC_LANG_POP([C]) ]) + +AC_DEFUN([CHECK_LD_SYMVERS], [ + AC_MSG_CHECKING([linker support for symbol maps]) + echo '{global:*;};' >conftest.map + saved_LDFLAGS="$LDFLAGS" + LDFLAGS="$LDFLAGS -Wl,--version-script=conftest.map" + AC_LINK_IFELSE([AC_LANG_SOURCE([ int main() { return 0; } ])], + [with_ldsym=yes], [with_ldsym=no]) + LDFLAGS="$saved_LDFLAGS" + rm conftest.map + AM_CONDITIONAL([WITH_LDSYM], [test "$with_ldsym" = yes]) + AS_IF([test -n "$LD" && $LD -z help >/dev/null 2>/dev/null], [with_sun_ld=yes], [with_sun_ld=no]) + AM_CONDITIONAL([WITH_SUN_LD], [test "$with_sun_ld" = yes]) + AS_IF([test "$with_ldsym" = yes], [ + AC_MSG_RESULT([-Wl,--version-script]) + ], [test "$with_sun_ld" = yes], [ + AC_MSG_RESULT([-M]) + ], [ + AC_MSG_RESULT([no]) + ]) +]) |