hurd: Add OPTION_GLIBC_P and OPTION_GLIBC

GNU/Hurd uses glibc just like GNU/Linux.

This is needed for gcc to notice that glibc supports split stack in
finish_options.

	PR go/104290
gcc/ChangeLog:
	* config/gnu.h (OPTION_GLIBC_P, OPTION_GLIBC): Define.

(cherry picked from commit 29eacf043b6e8560c5c42d67f7f9b11e4e2cb156)

diff --git a/gcc/config/gnu.h b/gcc/config/gnu.h
index e2a33baf0402e5c6eb10b5c9331a16e04440ea25..4e921e0d51e4e5760b02ccaba89f15c6911404f3 100644 (file)
--- a/gcc/config/gnu.h
+++ b/gcc/config/gnu.h
@@ -19,6 +19,10 @@ You should have received a copy of the GNU General Public License
 along with GCC.  If not, see <http://www.gnu.org/licenses/>.
 */
 
+/* C libraries used on GNU/Hurd.  */
+#define OPTION_GLIBC_P(opts)   (DEFAULT_LIBC == LIBC_GLIBC)
+#define OPTION_GLIBC           OPTION_GLIBC_P (&global_options)
+
 #undef GNU_USER_TARGET_OS_CPP_BUILTINS
 #define GNU_USER_TARGET_OS_CPP_BUILTINS()              \
     do {                                       \