diff options
Diffstat (limited to 'configure.ac')
| -rw-r--r-- | configure.ac | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/configure.ac b/configure.ac index d89aaf0cdf..65a6c909d6 100644 --- a/configure.ac +++ b/configure.ac @@ -1199,6 +1199,29 @@ EOF fi if test $libc_cv_visibility_attribute = yes; then + AC_CACHE_CHECK(linker support for protected data symbol, + libc_cv_protected_data, + [cat > conftest.c <<EOF + int bar __attribute__ ((visibility ("protected"))) = 1; +EOF + libc_cv_protected_data=no + if AC_TRY_COMMAND(${CC-cc} -nostdlib -nostartfiles -fPIC -shared conftest.c -o conftest.so); then + cat > conftest.c <<EOF + extern int bar; + int main (void) { return bar; } +EOF + if AC_TRY_COMMAND(${CC-cc} -nostdlib -nostartfiles conftest.c -o conftest conftest.so); then + libc_cv_protected_data=yes + fi + fi + rm -f conftest.* + ]) +else + libc_cv_protected_data=no +fi +AC_SUBST(libc_cv_protected_data) + +if test $libc_cv_visibility_attribute = yes; then AC_CACHE_CHECK(for broken __attribute__((visibility())), libc_cv_broken_visibility_attribute, [cat > conftest.c <<EOF |