diff -ur cmocka-0.4.1.orig/include/cmocka.h cmocka-0.4.1/include/cmocka.h
--- cmocka-0.4.1.orig/include/cmocka.h	2014-05-20 11:03:36.000000000 +0200
+++ cmocka-0.4.1/include/cmocka.h	2015-04-25 00:32:45.199424822 +0200
@@ -49,7 +49,11 @@
 
 /* For those who are used to __func__ from gcc. */
 #ifndef __func__
-#define __func__ __FUNCTION__
+# if __GNUC__ >= 5
+#  define __func__ __extension__ __FUNCTION__
+# else
+#  define __func__ __FUNCTION__
+# endif
 #endif
 
 /* GCC have printf type attribute check.  */
Only in cmocka-0.4.1.orig/include: .cmocka.h.swp