$OpenBSD: patch-gcc_varasm_c,v 1.1.1.1 2010/10/10 17:39:06 steven Exp $
--- gcc/varasm.c.orig	Sat Mar 10 01:59:15 2007
+++ gcc/varasm.c	Mon Jun 14 19:23:04 2010
@@ -397,7 +397,7 @@ initialize_cold_section_name (void)
 
       stripped_name = targetm.strip_name_encoding (name);
 
-      buffer = ACONCAT ((stripped_name, "_unlikely", NULL));
+      buffer = ACONCAT ((stripped_name, "_unlikely", (char *)0));
       cfun->unlikely_text_section_name = ggc_strdup (buffer);
     }
   else