# Copyright 1999-2005 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2
# $Header: $

DESCRIPTION="Giac is a free computer algebra system"
HOMEPAGE="http://xcas.sourceforge.net"
SRC_URI="mirror://sourceforge/xcas/${P}.tar.gz
	 http://www-fourier.ujf-grenoble.fr/~parisse/giacshare.tgz"

LICENSE="GPL-2"
KEYWORDS="~x86 ~ppc ~ia64 ~amd64 ~arm"
IUSE="debug doc mpfr ntl gsl gslcblas"

DEPEND=">=dev-util/bakefile-0.1.8
	>=dev-libs/gmp-4.0
	>=sys-libs/readline-4.3
	ntl? ( >=dev-libs/ntl-5.3.2 )
	gsl? ( >=sci-libs/gsl-1.4 )
	gslcblas? ( >=sci-libs/gsl-1.4 )"

src_unpack() {
	unpack ${A}
}

src_compile() {

	# For pari to work along with giac, one has to copy pariinl.h from giac to /usr/.../include/pari
	# so that it does not redefine things like abs()...
	# That's why pari is not supported by default.

	local myconf

	myconf="${myconf} -DUSE_MPFI=no -DUSE_PARI=no -DUSE_READLINE=yes"
	use debug    && myconf="${myconf} -DBUILD=debug"
	use mpfr     && myconf="${myconf} -DUSE_MPFR=yes"
	use ntl      && myconf="${myconf} -DUSE_NTL=yes" 
	use gsl      && myconf="${myconf} -DUSE_GSL=yes"
	use gslcblas && myconf="${myconf} -DUSE_GSLCBLAS=yes"

	bakefile -f gnu giac.bkl ${myconf} -DCXXFLAGS="${CXXFLAGS}" -DLDFLAGS="${LDFLAGS}" -o Makefile || die

	emake || die
}

src_install() {
	einstall || die

	dosym cas /usr/bin/giac

	use doc && insinto /usr/share/giac/doc
	use doc && doins -r ${WORKDIR}/giac/doc/*

	dodoc README* AUTHORS COPYING NEWS
}