diff options
Diffstat (limited to 'configure.in')
| -rw-r--r-- | configure.in | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/configure.in b/configure.in index ee41122593..d2af5ab277 100644 --- a/configure.in +++ b/configure.in @@ -1013,6 +1013,48 @@ EOF fi fi + if test $libc_cv_visibility_attribute = yes; then + AC_CACHE_CHECK(for broken __attribute__((visibility())), + libc_cv_broken_visibility_attribute, + [cat > conftest.c <<EOF + int foo (int x); + int bar (int x) __asm__ ("foo") __attribute__ ((visibility ("hidden"))); + int bar (int x) { return x; } +EOF + libc_cv_broken_visibility_attribute=yes + if ${CC-cc} -Werror -S conftest.c -o conftest.s >/dev/null 2>&1; then +changequote(,)dnl + if grep '\.hidden[ _]foo' conftest.s >/dev/null; then +changequote([,])dnl + libc_cv_broken_visibility_attribute=no + fi + fi + rm -f conftest.c conftest.s + ]) + if test $libc_cv_broken_visibility_attribute = yes; then + AC_DEFINE(HAVE_BROKEN_VISIBILITY_ATTRIBUTE) + fi + fi + + AC_CACHE_CHECK(for broken __attribute__((alias())), + libc_cv_broken_alias_attribute, + [cat > conftest.c <<EOF + extern int foo (int x) __asm ("xyzzy"); + int bar (int x) { return x; } + extern __typeof (bar) foo __attribute ((weak, alias ("bar"))); +EOF + libc_cv_broken_alias_attribute=yes + if ${CC-cc} -Werror -S conftest.c -o conftest.s >/dev/null 2>&1; then + if grep 'xyzzy' conftest.s >/dev/null; then + libc_cv_broken_alias_attribute=no + fi + fi + rm -f conftest.c conftest.s + ]) + if test $libc_cv_broken_alias_attribute = yes; then + AC_DEFINE(HAVE_BROKEN_ALIAS_ATTRIBUTE) + fi + if test $libc_cv_visibility_attribute = yes -a $gnu_ld = yes; then AC_CACHE_CHECK(whether to put _rtld_local into .sdata section, libc_cv_have_sdata_section, |