Forcing POSIX 1003.2-1992 removes locale_t from <locale.h>.
This breaks including libintl.h, since gettext is built with locale_t
in view.

Index: src/normalize.c
--- src/normalize.c.orig
+++ src/normalize.c
@@ -15,7 +15,7 @@
    along with this program; if not, write to the Free Software
    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA*/
 
-#define _POSIX_C_SOURCE 2
+/* #define _POSIX_C_SOURCE 2 */
 
 #include "config.h"
 
