Missed half the support for __USE_ISOC11

diff --git a/include/features.h b/include/features.h
index 173afc1..7bb27c5 100644 (file)
--- a/include/features.h
+++ b/include/features.h
@@ -194,6 +194,8 @@
 /* This is to enable the ISO C11 extension.  */
 #if (defined _ISOC11_SOURCE \
      || (defined __STDC_VERSION__ && __STDC_VERSION__ >= 201112L))
+# define __USE_ISOC11  1
+#endif
 
 /* This is to enable the ISO C99 extension.  */
 #if (defined _ISOC99_SOURCE || defined _ISOC11_SOURCE \