$NetBSD: patch-af,v 1.3 2005/07/25 13:41:54 thomasklausner Exp $

--- configure.orig	2005-05-01 06:59:59.000000000 +0200
+++ configure
@@ -5769,7 +5769,7 @@ fi
 done
 test -n "$YACC" || YACC="yacc"
 
-	expr z"$YACC" : z"bison.*" >/dev/null || { { echo "$as_me:$LINENO: error: bison not found (and yacc will not work)" >&5
+	expr "$YACC" : ".*bison.*" >/dev/null || { { echo "$as_me:$LINENO: error: bison not found (and yacc will not work)" >&5
 echo "$as_me: error: bison not found (and yacc will not work)" >&2;}
    { (exit 1); exit 1; }; }