$OpenBSD: patch-gcc_diagnostic_c,v 1.1.1.1 2009/06/22 22:37:32 sthen Exp $
--- gcc/diagnostic.c.orig	Wed Jul 11 22:32:42 2007
+++ gcc/diagnostic.c	Mon Jun 22 00:53:59 2009
@@ -430,7 +430,7 @@ diagnostic_report_diagnostic (diagnostic_context *cont
       if (context->show_option_requested && diagnostic->option_index)
 	diagnostic->message.format_spec
 	  = ACONCAT ((diagnostic->message.format_spec,
-		      " [", cl_options[diagnostic->option_index].opt_text, "]", NULL));
+		      " [", cl_options[diagnostic->option_index].opt_text, "]", (char *)0));
 
       diagnostic->message.locus = &diagnostic->location;
       pp_format (context->printer, &diagnostic->message);
