#!/bin/sh
#
# mkconfigx
#
# Copyright (c) 2003
# Marc Singer <elf@buici.com>
#
# Generate a configuration file to control building
# (compiling/linking).  The output may be included in Makefiles to
# select which source files to compile and link.
#
# Here, we select configuration entries of the form:
#  
#  #define CONFIG_XXX 1
#
# where XXX is an enabled configuration option.
# 
#
# About CPP
# ---------
#
# The macro CPP may refer to 'gcc -E'.  This definition is not
# compatible with this use of the preprocessor because the input file
# is a header and not a source file.  Should there be a dependency on
# a target-specific macro, another method must be found.
#

CONFIG=configx.mk

CPP=cpp
[ -z "$GREP" ] && GREP=grep
[ -z "$SED" ]  && SED=sed
[ -z "$SORT" ] && SORT=sort

echo > $CONFIG
echo "# Automatically generated - do not edit" >> $CONFIG
echo >> $CONFIG

$CPP -Iinclude -dM include/config.h\
  | $GREP -E "define[ \t]+CONFIG_[^ \t]*[ \t]+1$"\
  | $SED -e "s/.*\(CONFIG_[^ \t]*\).*/\1=y/"\
  | $SORT\
  >> $CONFIG