configure

#!/bin/sh

DEST=Makefile
LOG=config.log

usage()
{
	echo "Usage:"
	echo "   ./configure [options]"
	echo "Options:"
	echo "   --enable-fltk-run (default)"
	echo "   --disable-fltk-run"
	echo "   --disable-prebuild"
	echo "   --enable-slow-cpu"
	echo "   --disable-slow-cpu (default)"
	echo "   --disable-xrandr"
	echo "   --with-fltk-dir=FLTK_DIR (default empty, means use installed version)"
}

log()
{
	echo "$1"
	echo "$1" >> $LOG
}

destwrite()
{
	log "Write '$1'"
	echo "$1" >> $DEST
}

USE_FLTK_RUN=1
HAVE_SLOW_CPU=0
FLTK_DIR=""
HAVE_XRANDR=1
PREBUILD_LANDSCAPE=1

rm -f $LOG

log "# input parameters"
if [ "$1" = "" ]; then
log "(none)"
fi
while [ "$1" != "" ]; do
	PARAM=`echo $1 | awk -F= '{print $1}'`
	VALUE=`echo $1 | awk -F= '{print $2}'`
	log "$PARAM $VALUE"
	case $PARAM in
		--enable-fltk-run )
				USE_FLTK_RUN=1
				;;
		--enable-slow-cpu )
				HAVE_SLOW_CPU=1
				;;
		--disable-fltk-run )
				USE_FLTK_RUN=0
				;;
		--disable-prebuild )
				PREBUILD_LANDSCAPE=0
				;;
		--disable-slow-cpu )
				HAVE_SLOW_CPU=0
				;;
		--disable-xrandr )
				HAVE_XRANDR=0
				;;
		--with-fltk-dir )
				FLTK_DIR=$VALUE
				;;
		-h | --help )
				usage
				exit 1
				;;
		*)
			log "ERROR: unknown parameter \"$PARAM\""
			usage
			exit 1
			;;
	esac
	shift
done

rm -f $DEST

# strip a trailing '/' from FLTK_DIR
lastchr=${FLTK_DIR#${FLTK_DIR%?}}
if [ "$lastchr" = "/" ]; then
	FLTK_DIR=${FLTK_DIR%?}
fi

log "# output"
if [ "$FLTK_DIR" != "" ]; then
fltk_config=$FLTK_DIR/fltk-config
else
fltk_config=`which fltk-config`
fi

if [ "$fltk_config" = "" ]; then
log "FLTK not found!"
exit 1
fi

log "Using $fltk_config"
fltk_version=`$fltk_config --version`
log "FLTK version $fltk_version"
if [ "$fltk_version" = "" ]; then
log "FLTK version not found!"
exit 1
fi

if [ "$fltk_version" \< "1.3" ]; then
log "FLTK 1.3 or above needed"
exit 1
fi

if [ $HAVE_XRANDR = "1" ]; then
if [ ! -e "/usr/include/X11/extensions/Xrandr.h" ]; then
	HAVE_XRANDR=0
	log "No fullscreen support (install libxrandr-dev package if required)"
else
	log "xrandr will be used for switching to fullscreen."
fi
fi


destwrite "# $DEST created by $0"
log "FLTK_DIR=\"$FLTK_DIR\""
if [ "$FLTK_DIR" != "" ]; then
destwrite "FLTK_DIR=$FLTK_DIR/"
else
destwrite "FLTK_DIR="
fi
destwrite "USE_FLTK_RUN=$USE_FLTK_RUN"
destwrite "HAVE_SLOW_CPU=$HAVE_SLOW_CPU"
if [ "$PREBUILD_LANDSCAPE" = "0" ]; then
destwrite "PREBUILD_LANDSCAPE=0"
fi
if [ "$HAVE_XRANDR" = "1" ]; then
destwrite "HAVE_XRANDR=1"
fi

APLAY_HAVE_PIDFILE=`man aplay | grep "process-id-file"`
if [ "$APLAY_HAVE_PIDFILE" != "" ]; then
destwrite "APLAY_HAVE_PIDFILE=1"
fi

FLTK_USES_XRENDER=`$fltk_config --ldflags | grep "Xrender"`
if [ "$FLTK_USES_XRENDER" != "" ]; then
destwrite "FLTK_USES_XRENDER=1"
fi

cat Makefile.in >>$DEST
log "$DEST written successfully."
# force complete rebuild
log "# postprocessing"
log "make clean"
make clean >> $LOG
log "Success - you can run make now!"