# Copyright 1999-2005 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2
# $Header: /var/cvsroot/gentoo-x86/sci-chemistry/gromacs/gromacs-3.3.ebuild,v 1.1 2005/10/14 00:44:11 spyderous Exp $

inherit eutils

IUSE="altivec mpi 3dnow sse double-precision threads"

DESCRIPTION="The ultimate molecular dynamics simulation package"
SRC_URI="ftp://ftp.gromacs.org/pub/${PN}/${P}.tar.gz"
HOMEPAGE="http://www.gromacs.org/"

LICENSE="GPL-2"
SLOT="0"
KEYWORDS="~x86 ~amd64 ~ppc64 ~ia64"

#mpi is a local USE flag now
#May become official when situation with mpich is cleared (now the only mpi implementation awailable is lam-mpi)
DEPEND="sci-libs/fftw
	mpi? ( sys-cluster/lam-mpi )
	>=sys-devel/binutils-2.12
	app-shells/tcsh"

src_compile() {
	local flag
	flag=`usev x86 amd64 ppc64 ia64`
	case "${flag}" in
	x86)
		econf \
			--libdir=/usr/lib \
			$(use_enable mpi) \
			$(use_enable double-precision double) \
			$(use_enable threads) \
			$(use_enable 3dnow ia32-3dnow) \
			$(use_enable sse ia32-sse) || die "configure failed"
		;;
	amd64)
		econf \
			--libdir=/usr/lib \
			$(use_enable mpi) \
			$(use_enable double-precision double) \
			$(use_enable threads) \
			$(use_enable sse x86-64-sse) || die "configure failed"
		;;
	ppc64)
		econf \
			--libdir=/usr/lib \
			$(use_enable mpi) \
			$(use_enable double-precision double) \
			$(use_enable threads) \
			$(use_enable altivec ppc-altivec) || die "configure failed"
		;;
	ia64)
		econf \
			--libdir=/usr/lib \
			--enable-ia64-asm \
			$(use_enable double-precision double) \
			$(use_enable threads) \
			$(use_enable mpi) || die "configure failed"
		;;
	*)
		econf \
			--enable-fortran
			--libdir=/usr/lib \
			$(use_enable double-precision double) \
			$(use_enable threads) \
			$(use_enable mpi) || die "configure failed"
		;;
	esac
	
	emake || die
}

src_install () {
	make DESTDIR=${D} install || die

	# Install documentation.
	dodoc AUTHORS COPYING INSTALL README

	#move html docs under /usr/share/doc
	mv ${D}/usr/share/gromacs/html ${D}/usr/share/doc/${PF}/
}