$OpenBSD: patch-gcc_tree-mudflap_c,v 1.1.1.1 2010/10/10 17:39:06 steven Exp $
--- gcc/tree-mudflap.c.orig	Mon Oct  9 15:58:10 2006
+++ gcc/tree-mudflap.c	Mon Jun 14 19:23:04 2010
@@ -236,7 +236,7 @@ mf_file_function_line_tree (location_t location)
   else
     op = name = cp = "";
 
-  string = concat (file, colon, line, op, name, cp, NULL);
+  string = concat (file, colon, line, op, name, cp, (void *)0);
   result = mf_build_string (string);
   free (string);