--- gcc/config/convex/xm-convex.h	2018/04/24 18:10:25	1.1.1.1
+++ gcc/config/convex/xm-convex.h	2018/04/24 18:15:19	1.1.1.2
@@ -36,11 +36,6 @@ the Free Software Foundation, 675 Mass A
 #define SUCCESS_EXIT_CODE 0
 #define FATAL_EXIT_CODE 33
 
-/* If compiled with GNU C, use the built-in alloca */
-#ifdef __GNUC__
-#define alloca __builtin_alloca
-#endif
-
 /* Convex ships /tmp as a separate file system - thus it
    usually has more free space than /usr/tmp */