ECH=0
DEBUG=0
OPENGLINCL=""
VRML97COMP=0
TR=0
TRINCL=""
TRLIBS=""
PNG=0
TDM=0
TDMINCL=""
TDMLIBS=""
CFLAG="-DWIN32 -DMAV_CYGWIN"

if [ $ECH = "1" ] ; then echo; echo Processing options; echo Options are `echo $* | sed 's/--/:/g'` ; fi

IFS=:
for i in `echo $* --fin | sed 's/--/:/g'`
do 
    if [ "$i" != "" ] ; then 
    if [ $ECH = "1" ] ; then echo; echo Processing option $i ; fi

    case $i in
    "fin")
	;;

    "debug ")
	if [ $ECH = "1" ] ; then echo Debug option detected ; fi
	DEBUG=1;
	;;

    TRLIBS*)
	if [ $ECH = "1" ] ; then echo TR library path detected ; fi
	TR=1
	TRLIBS=`echo $i | cut -f2 -d"=" | awk '{print substr($0, 1, length-1)}'`
	if [ $ECH = "1" ] ; then echo TR library path set to "["$TRLIBS"]" ; fi
	;;

    TRINCL*)
	if [ $ECH = "1" ] ; then echo TR include path detected ; fi
	TR=1
	TRINCL=`echo $i | cut -f2 -d"=" | awk '{print substr($0, 1, length-1)}'`
	if [ $ECH = "1" ] ; then echo TR include path set to "["$TRINCL"]" ; fi
	;;

    "PNG ")
       if [ $ECH = "1" ] ; then echo PNG option detected ; fi
       PNG=1
       ;;
 
    OPENGLINCL*)
	OPENGLINCL=`echo $i | cut -f2 -d"=" | awk '{print substr($0, 1, length-1)}'`
	;;

    "VRML97 ")
	if [ $ECH = "1" ] ; then echo VRML97 option detected ; fi
	VRML97COMP=1
	;;

    TDMLIBS*)
	if [ $ECH = "1" ] ; then echo TDM library path detected ; fi
	TDM=1
	TDMLIBS=`echo $i | cut -f2 -d"=" | awk '{print substr($0, 1, length-1)}'`
	if [ $ECH = "1" ] ; then echo TDM library path set to "["$TDMLIBS"]" ; fi
	;;

    TDMINCL*)
	if [ $ECH = "1" ] ; then echo TDM include path detected ; fi
	TDM=1
	TDMINCL=`echo $i | cut -f2 -d"=" | awk '{print substr($0, 1, length-1)}'`
	if [ $ECH = "1" ] ; then echo TDM include path set to "["$TDMINCL"]" ; fi
	;;

    "help ")
	echo "Usage $0 [options]"
	echo "Where options are:"
	echo "  --debug"
	echo "  --OPENGLINCL=<include command> e.g. -I/someplace/incl"
	echo "  --TRINCL=<include command> (e.g. -I/home/keatesm/tr-1.1)"
	echo "  --TRLIBS=<link command> (e.g. /home/keatesm/tr-1.1/tr.o)"
	echo "  --VRML97 (requires a C++ compiler, flex and bison)"
	echo "  --PNG (requires png and zlib libraries)"
	echo "  --TDMINCL=<include command>"
	echo "  --TDMLIBS=<link command>"
	exit 1
	;;

    *)
	echo Unknown option $i
	echo Try $0 --help
	exit 1
	;;
    esac
    fi
done

    if [ "$DEBUG" = "1" ] ; then
	CFLAG="-Wall -g $CFLAG"
    else
	CFLAG="-Wall -O2 -fomit-frame-pointer -funroll-loops -finline-functions $CFLAG"
    fi

cat << EOF >Makefile
all:    plat

libs:
	cd src; make

egs:
	cd examples; make

dems:
	cd demos; make

clean:
	cd src; make clean
	cd examples; make clean
	cd demos; make clean

plat:
	make libs \\
	"CC= gcc" \\
	"CFLAG= ${CFLAG}" \\
	"OPENGLINCL= ${OPENGLINCL}" \\
	"CXX= g++" \\
	"CXXFLAG= " \\
EOF

if [ $TDM = "1" ] ; then
cat <<EOF >>Makefile
	"TDMINCL= -DMAV_TDM ${TDMINCL}" \\
	"TDMLIBS= ${TDMLIBS}" \\
EOF
fi

if [ $TR = "1" ] ; then
cat <<EOF >>Makefile
	"TRINCL = -DMAV_TR ${TRINCL}" \\
	"TRLIBS = ${TRLIBS}" \\
EOF
fi

if [ $PNG = "1" ] ; then
cat <<EOF >>Makefile
	"PNGINCL= -DMAV_PNG" \\
EOF
fi

cat <<EOF >>Makefile
	"VRML97COMP= ${VRML97COMP}"
	make egs \\
	MAV_HOME=`pwd` \\
	"CC= gcc"
	make dems \\
	MAV_HOME=`pwd` \\
	"CC= gcc -DWIN32" \\
	"OPENGLINCL= ${OPENGLINCL}" 
EOF