$NetBSD: patch-ab,v 1.15 2010/04/14 12:38:23 hans Exp $

--- configure.orig	2009-01-15 04:37:34.000000000 +0100
+++ configure	2010-04-13 20:43:29.487823256 +0200
@@ -474,6 +474,10 @@ do
         subdir_configure_args="$subdir_configure_args $arg"
         makemake_args="$makemake_args $arg" ;;
 
+      --x-*)
+	subdir_configure_args="$subdir_configure_args --with-${arg#--}"
+	makemake_args="$makemake_args --with-${arg#--}" ;;
+
       --enable-* | --disable-*)
         subdir_configure_args="$subdir_configure_args $arg"
         makemake_args="$makemake_args $arg" ;;