2012-03-30  Jeff Law  <law@redhat.com>

	* include/features.h: Warn if user requests FORTIFY_SOURCE checking
	but the checks are disabled for any reason.

diff --git a/include/features.h b/include/features.h
index c347555..e3ad8b0 100644
--- a/include/features.h
+++ b/include/features.h
@@ -325,6 +325,10 @@
 # define __USE_FORTIFY_LEVEL 0
 #endif
 
+#if defined _FORTIFY_SOURCE && _FORTIFY_SOURCE > 0 && __USE_FORTIFY_LEVEL == 0
+# warning _FORTIFY_SOURCE requested but disabled, please enable optimizer to restore fortification
+#endif
+
 /* We do support the IEC 559 math functionality, real and complex.  */
 #define __STDC_IEC_559__		1
 #define __STDC_IEC_559_COMPLEX__	1