$NetBSD: patch-ad,v 1.2 2014/07/22 11:33:47 wiz Exp $

--- grap_lex.ll.orig	2006-01-09 19:42:35.000000000 +0000
+++ grap_lex.ll
@@ -25,7 +25,7 @@ extern "C" {
 #include "grap_draw.h" 
 #include "y.tab.h"
 
-extern int errno;
+#include <errno.h>
 
 #ifndef STRERROR_DECLARED
 #if HAVE_STRERROR