$OpenBSD: patch-gcc_varasm_c,v 1.4 2009/04/16 18:36:48 espie Exp $
--- gcc/varasm.c.orig	Sat Feb  2 02:42:03 2008
+++ gcc/varasm.c	Tue Apr  7 19:39:00 2009
@@ -396,7 +396,7 @@ 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
