$OpenBSD: patch-gcc_coverage_c,v 1.5 2006/03/05 22:11:15 espie Exp $
--- gcc/coverage.c.orig	Mon Oct 31 19:23:44 2005
+++ gcc/coverage.c	Sat Mar  4 14:34:45 2006
@@ -813,7 +813,7 @@ build_gcov_info (void)
   fields = field;
   filename = getpwd ();
   filename = (filename && da_file_name[0] != '/'
-	      ? concat (filename, "/", da_file_name, NULL)
+	      ? concat (filename, "/", da_file_name, (void *)0)
 	      : da_file_name);
   filename_len = strlen (filename);
   filename_string = build_string (filename_len + 1, filename);
