--- configure.ac.orig	2015-04-26 13:55:34.199166493 +0100
+++ configure.ac	2015-04-26 13:56:50.633303028 +0100
@@ -1,83 +1,12 @@
 # configure.ac  -*- Autoconf -*-
 # Process this file with autoconf, to generate a configure script.
-#
-# $Id: configure.ac,v 1.2 2007/05/03 22:46:09 keithmarshall Exp $
-#
-# Copyright (C) 2007, MinGW Project
-# Written by Keith Marshall <keithmarshall@users.sourceforge.net>
-#
-# Package identification.
-#
-# This is configure.ac for the MinGW `libgnurx' package.
-# BASENAME, VERSION_MAJOR and VERSION_MINOR are required tags;
-# complete `Value' fields as appropriate.
-#
-#                            Tag              Value
-#                            ---------------  ----------
-  MINGW_AC_DEFINE_PACKAGE_ID([BASENAME],      [libgnurx])
-  MINGW_AC_DEFINE_PACKAGE_ID([VERSION_MAJOR], [2])
-  MINGW_AC_DEFINE_PACKAGE_ID([VERSION_MINOR], [5])
-#
-# PATCHLEVEL is optional; comment/uncomment and adjust as required.
-#
-  MINGW_AC_DEFINE_PACKAGE_ID([PATCHLEVEL],    [1])
-#
-# DLL_VERSION is required; installed DLLs will be versioned, by
-# appending a hyphen, the specified tag value, and then the `.dll'
-# file name extension, to the base name of each generated DLL.
-#
-  MINGW_AC_DEFINE_PACKAGE_ID([DLL_VERSION],   [0])
-#
-#
-# libgnurx is an adaptation of Tor Lillqvist's original port of the
-# regex functions from GNU libc, for use on native Woe32 platforms.
-#
-# The original sources, on which this port is based, remain copyright
-# of their respective authors, or of the Free Software Foundation Inc.,
-# as indicated in individual file headers; all are redistributed with
-# permission, as granted by the GNU Lesser General Public License.
-#
-# This is free software.  It is provided AS IS, in the hope that it may
-# be useful, but WITHOUT WARRANTY OF ANY KIND, not even an IMPLIED WARRANTY
-# of MERCHANTABILITY, nor of FITNESS FOR ANY PARTICULAR PURPOSE.
-#
-# Permission is granted to redistribute this software, either "as is" or
-# in modified form, under the terms of the GNU Lesser General Public License,
-# as published by the Free Software Foundation; either version 2.1, or (at
-# your option) any later version.
-#
-# You should have received a copy of the GNU Lesser General Public License
-# along with this software; see the file COPYING.LIB.  If not, write to the
-# Free Software Foundation, 51 Franklin St - Fifth Floor, Boston,
-# MA 02110-1301, USA.
 
-# Autoconf initialisation.
-#
-  AC_PREREQ([2.59])
-  AC_INIT(__MINGW_AC_PACKAGE_IDENTIFICATION__)
+AC_INIT(libgnurx, 2.5.1)
+AM_INIT_AUTOMAKE
+AC_PROG_INSTALL
+AC_LIBTOOL_DLOPEN
+AC_LIBTOOL_WIN32_DLL
+AC_PROG_LIBTOOL
 
-# Compiler and build tool checks.
-#
-  AC_PROG_CC
-  MINGW_AC_PROG_CC_OPTIONS([CC_QUALIFIED], [-m], [threads tune=pentium3])
+AC_OUTPUT([Makefile])
 
-# Set the release version for the resultant DLL.
-#
-  AC_SUBST([DLLVERSION], [__MINGW_AC_PACKAGE_DLL_VERSION__])
-
-# User configuration options.
-#
-  MINGW_AC_DISTRIBUTION_TYPE([tar])
-  MINGW_AC_MSVC_IMPORT_LIBS([GNURX_LIB], [gnurx.lib])
-  MINGW_AC_DEV_INSTALL_OPTION
-
-# Configuration output.
-#
-  AC_SUBST([GNURX_LIB])
-  AC_SUBST([CC_QUALIFIED], ["$CC $CC_QUALIFIED"])
-  LDFLAGS="$LDFLAGS -Wl,--enable-auto-image-base -Wl,--out-implib,libgnurx.dll.a"
-  test -n "${GNURX_LIB}" && LDFLAGS="$LDFLAGS -Wl,--output-def,libgnurx.def"
-  AC_CONFIG_FILES([Makefile])
-  AC_OUTPUT
-#
-# $RCSfile: configure.ac,v $Revision: 1.2 $: end of file