#!/bin/sh
#
#   'configure' script for Parenthetcl 
#
# Copyright (c) 2004-2006 Henry Strickland
#
# Permission is hereby granted, free of charge, to any person obtaining a
# copy of this software and associated documentation files (the "Software"),
# to deal in the Software without restriction, including without limitation
# the rights to use, copy, modify, merge, publish, distribute, sublicense,
# and/or sell copies of the Software, and to permit persons to whom the
# Software is furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included
# in all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
# THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
# OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
# ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
# OTHER DEALINGS IN THE SOFTWARE.
#
#         (* http://www.opensource.org/licenses/mit-license.php *)


PREFIX=${PREFIX:-/usr/local}
TCLSH=${TCLSH:-tclsh8.4}
CC=${CC:-gcc}


for x
do
    case "$x" in

	--prefix=* )

	    PREFIX=`expr "X$x" : 'X--prefix=\(.*\)'`
	    ;;

	--tclsh=* )

	    TCLSH=`expr "X$x" : 'X--tclsh=\(.*\)'`
	    ;;

	--cc=* )

	    CC=`expr "X$x" : 'X--cc=\(.*\)'`
	    ;;

	* )
	    echo "This is a very simple configure script, not the usual one." >&2
	    echo "The --prefix= option specifies the install location, as usual." >&2
	    echo "Use --tclsh= and --cc= options to specify your tclsh and gcc commands" >&2
	    echo "if 'tclsh8.4' and 'gcc' are not correct in your PATH." >&2
	    echo "" >&2
	    echo "Usage:   $0  --prefix=/usr/local --tclsh=tclsh8.4  --cc=gcc " >&2
	    echo "" >&2
	    exit 1
	    ;;
    esac
done

echo "  ... prefix = $PREFIX"
echo "  ... tclsh = $TCLSH"
echo "  ... cc = $CC"

test -d "$PREFIX" || { echo "ERROR: Prefix directory does not exist: $PREFIX" >&2 ; exit 1 ; }
$TCLSH </dev/null || { echo "ERROR: Executable not found: $TCLSH" >&2 ; exit 1 ; }

case "$TCLSH" in
  /* )
	# absolute path
	tclbin=`dirname $TCLSH`
	TCLROOT=`dirname $tclbin`
	;;
  * )
	# relative path
	tcllib=`echo 'puts [info library]' | $TCLSH`
	uplib=`dirname $tcllib`
	TCLROOT=`dirname $uplib`
	;;
esac

echo "  ... TCLROOT = $TCLROOT"

test ! -z "$TCLROOT" || { echo "ERROR: Empty TCLROOT; try using --tclsh=/path/to/tclsh" >&2 ; exit 1 ; }
test -d "$TCLROOT" || { echo "ERROR: TCLROOT does not exist; try using --tclsh=/path/to/tclsh" >&2 ; exit 1 ; }

for z in Makefile p7c tests/mk-makefile.sh
do
    echo "Creating $z" >&2
    rm -f $z
    sed -e "s,@CC@,$CC,g" -e "s,@TCLROOT@,$TCLROOT,g" -e "s,@TCLSH@,$TCLSH,g" -e "s,@PREFIX@,$PREFIX,g" < $z.in > $z
    # so we dont forget and edit the product:
    chmod -w $z
done
echo "Creating tests/Makefile" >&2
( cd tests && rm -f Makefile && sh mk-makefile.sh > Makefile && chmod -w Makefile ) || exit $?

chmod +x p7c

rm -f .config.sh
echo $0 $* > .config.sh

echo ""
echo "OKAY.  Now run   make clean all test install" >&2