source: MondoRescue/branches/2.2.5/mindi-busybox/scripts/mkconfigs

#!/bin/sh
#
# Copyright (C) 2002 Khalid Aziz <khalid_aziz at hp.com>
# Copyright (C) 2002 Randy Dunlap <rddunlap at osdl.org>
# Copyright (C) 2002 Al Stone <ahs3 at fc.hp.com>
# Copyright (C) 2002 Hewlett-Packard Company
#
#   This program is free software; you can redistribute it and/or modify
#   it under the terms of the GNU General Public License as published by
#   the Free Software Foundation; either version 2 of the License, or
#   (at your option) any later version.
#
#   This program is distributed in the hope that it will be useful,
#   but WITHOUT ANY WARRANTY; without even the implied warranty of
#   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#   GNU General Public License for more details.
#
#   You should have received a copy of the GNU General Public License
#   along with this program; if not, write to the Free Software
#   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
#
#   Busybox version by Matteo Croce <3297627799 at wind.it>
#
# Rules to generate bbconfigopts.h from .config:
#      - Retain lines that begin with "CONFIG_"
#      - Retain lines that begin with "# CONFIG_"
#      - lines that use double-quotes must \\-escape-quote them

config="$1"
if [ $# -lt 1 ]
then
    config=.config
fi

echo "\
#ifndef _BBCONFIGOPTS_H
#define _BBCONFIGOPTS_H
/*
 * busybox configuration settings.
 *
 * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
 *
 * This file is generated automatically by scripts/mkconfigs.
 * Do not edit.
 *
 */
static const char *const bbconfig_config ="

sed 's/\"/\\\"/g' $config | grep "^#\? \?CONFIG_" | awk '{print "\"" $0 "\\n\"";}'

echo ";"
echo "#endif /* _BBCONFIGOPTS_H */"