# Copyright 1999-2008 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2

inherit eutils

IUSE="fullconfig"

DESCRIPTION="research tool for polyhedral geometry"
SRC_URI="http://www.math.tu-berlin.de/polymake/download/polymake-2.3.tar.bz2"

HOMEPAGE="http://www.math.tu-berlin.de/polymake"

SLOT="0"
LICENSE="GPL-3"
KEYWORDS="~x86 ~amd64"

DEPEND="dev-libs/gmp
	>=sys-devel/gcc-4.1.2"

src_compile(){
	# The first configure prepares perl stuff and 
	# does not accept the answerfile
	touch answers || die "Cannot touch file for answers"
	emake configure < answers

	# Interactive Configuration
	if use fullconfig; then 
		emake configure || die "configuration failed"
	else
		# Preparing answers for configuration 
		echo "/usr/polymake" >> answers
		echo "/usr/polymake/bin" >> answers
		echo "/usr/polymake/doc" >> answers
		echo "g++" >> answers 
		echo "gcc" >> answers 
		echo "-O3" >> answers 
		# We rely on GCC using the LAST -O option
		echo $CXXFLAGS "-O3" >> answers 
		echo $CFLAGS "-O3" >> answers 
		echo $LDFLAGS >> answers 
		echo "none" >> answers 
		echo "none" >> answers 
		emake configure < answers
		rm answers
	fi

	einfo "During compile this package uses up to"
	einfo "300MB of RAM per process. Use MAKEOPTS=\"-j1\" if"
	einfo "you run into trouble."

	if ! use fullconfig; then 
		elog "Polymake will be built with -O3 which is considered safe"
		elog "Set useflag fullconfig to change"
	fi

	emake || die "emake failed"
}

src_install(){
	emake DESTDIR="${D}" install || die "install failed"
}

pkg_postinst(){
	elog "You will need to set up your PATH to use Polymake"
	elog "If you use bash add "
	elog "PATH=\$PATH:/usr/polymake/bin;"
	elog "to your .bashrc"

	elog "Polymake uses precompiled Perl Modules"
	elog "If something does not work after an upgrade of Perl re-emerge"
}