configure

#!/bin/sh
#
# Copyright (C) 2012 Mark Hills <mark@xwax.org>
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License version 2, as
# published by the Free Software Foundation.
#
# 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 version 2 for more details.
#
# You should have received a copy of the GNU General Public License
# version 2 along with this program; if not, write to the Free
# Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
# MA 02110-1301, USA.
#

OUTPUT=.config

usage()
{
cat <<EOF
Usage: configure [options]

Options:
  --prefix <dir>   Set the install prefix
  --enable-alsa    Enable ALSA audio device
  --enable-jack    Enable JACK audio device
  --enable-oss     Enable OSS audio device
  --debug          Debug build
  --profile        Profile build
EOF
}

# Set some defaults and parse the command line

PREFIX=
ALSA=false
JACK=false
OSS=false
DEBUG=false
PROFILE=false

while [ $# -ge 1 ]; do
	case $1 in
	--help)
		usage
		exit 0
		;;
	--enable-alsa)
		ALSA=true
		;;
	--enable-jack)
		JACK=true
		;;
	--enable-oss)
		OSS=true
		;;
	--prefix)
		if [ -z "$2" ]; then
			echo "--prefix requires a pathname argument" >&2
			exit 1
		fi
		PREFIX=$2
		shift
		;;
	--debug)
		DEBUG=true
		;;
	--profile)
		PROFILE=true
		;;
	esac

	shift
done

# Construct the output file

> $OUTPUT

if [ -n "$PREFIX" ]; then
	echo "Installation prefix $PREFIX"
	echo "PREFIX = $PREFIX" >> $OUTPUT
fi

if $ALSA; then
	echo "ALSA enabled"
	echo "ALSA = yes" >> $OUTPUT
else
	echo "ALSA disabled"
fi

if $JACK; then
	echo "JACK enabled"
	echo "JACK = yes" >> $OUTPUT
else
	echo "JACK disabled"
fi

if $OSS; then
	echo "OSS enabled"
	echo "OSS = yes" >> $OUTPUT
else
	echo "OSS disabled"
fi

if $DEBUG && $PROFILE; then
	echo "Debug and profile build cannot be used together" >&2
	exit 1
fi

if $DEBUG; then
	echo "Debug build"
	echo "CFLAGS += -O0 -g" >> $OUTPUT
fi

if $PROFILE; then
	echo "Profile build"
	echo "CFLAGS += -g -fno-inline-functions -fno-inline-functions-called-once -fno-optimize-sibling-calls" >> $OUTPUT
fi

# Explain the next step

echo "Be sure to run 'make clean' if you have changed the configuration."
echo "Run 'make' to compile xwax."