# Copyright 1999-2007 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2
# $Header: /var/cvsroot/gentoo-x86/sci-libs/acml/acml-3.1.0-r1.ebuild,v 1.4 2006/08/17 20:06:58 dberkholz Exp $

inherit eutils fortran

DESCRIPTION="The AMD Core Math Library (ACML) is a set of numerical routines tuned specifically for AMD64 platform processors (including Opteron and Athlon64 )."
HOMEPAGE="http://developer.amd.com/acml.jsp"

MY_PV=${PV//\./\-}

# We need a FORTRAN compiler.
FORTRAN="gfortran g77 ifc"
fortran_pkg_setup >/dev/null

RESTRICT="fetch nostrip"
LICENSE="ACML"
KEYWORDS="~amd64 ~x86"
SLOT="0"
IUSE="$FORTRAN int64 openmp example"
RDEPEND="app-admin/eselect-blas
		app-admin/eselect-cblas
		app-admin/eselect-lapack"

# Having at least one FORTRAN compiler.
# set $FORT according to the USE flags: ensure only one is enabled
use gfortran && ! use g77 && ! use ifc && FORT=gfortran
! use gfortran && use g77 && ! use ifc && FORT=gnu
! use gfortran && ! use g77 && use ifc && FORT=ifort

# If none or more than one FORTRAN USE flags are enabled, give a message
# and set $FORT according to $FORTRANC
if [[ -z $FORT ]] ; then
	einfo "You have enabled none or more than one FORTRAN USE flags,"
	einfo "\ti.e. gfortran, g77 and ifc."
	einfo "We will use the first availible Fortran compiler in"
	einfo "\tgfortran, g77, ifc."
	einfo "If you don't want this, please enable exactly ONE"
	einfo "\tof those FORTRAN related USE flags. "
	epause
	
	[[ $FORTRANC = "gfortran" ]] && FORT=gfortran
	[[ $FORTRANC = "g77" ]] && FORT=gnu
	[[ $FORTRANC = "ifc" ]] && FORT=ifort
fi

# $BITS 
[[ ${ARCH} = "amd64" ]] && BITS=64
[[ ${ARCH} = "x86" ]] && BITS=32

# $INT64
use int64 && [[ $FORT = "gfortran" ]] && INT64="-int64"

# Specific for acml 3.6.1, remove it for other versions!!!
[[ ${PV} = 3.6.1 ]] && [[ $FORT != gfortran ]] && MY_PV=${MY_PV//1/0} 

# Finally!
SRC_URI="acml-${MY_PV}-${FORT}-${BITS}bit${INT64}.tgz"

pkg_nofetch() {
	einfo "Please download the ACML from:"
	einfo "${HOMEPAGE}"
	einfo "and place it in ${DISTDIR}"
	einfo "The previous version could be found at"
	einfo "http://developer.amd.com/acmlarchive.jsp"
}

S=${WORKDIR}
src_unpack() {
	ewarn "From version 3.5.0 on, ACML no longer supports"
	ewarn "hardware without SSE/SSE2 instructions. "
	ewarn "For older 32-bit hardware that does not support SSE/SSE2,"
	ewarn "you must continue to use an older version (ACML 3.1.0 and ealier)."
	epause

	unpack ${A}
	(DISTDIR="${S}" unpack contents-acml-${MY_PV}-${FORT}-${BITS}bit${INT64}.tgz)
}

src_compile() {
	return
}

src_install() {
	if [[ $FORT = gfortran ]] ; then
		use int64 && INT64="_int64"
		use openmp && MP="_mp"
	fi
	
	DIR=${S}/${FORT}${BITS}${MP}${INT64}

	# Documentation
	cd ${S}/Doc
	dohtml html/*
	dodoc acml.txt
	doinfo acml.info*
	insinto /usr/share/doc/${PF}
	doins acml.pdf

	# Headers
	dodir /usr/include/acml
	insinto /usr/include/acml
	doins ${DIR}/include/*
	for FILE in `ls /usr/include/acml`;
		do dosym /usr/include/acml/${FILE} /usr/include/${FILE}
	done

	# Libraries
	dolib ${DIR}/lib/*

	# Examples
	if use example ; then
		insinto /usr/share/doc/${PF}/examples
		doins examples/*
	fi

	# eselect files
	eselect blas add $(get_libdir) ${FILESDIR}/eselect.blas acml
	eselect cblas add $(get_libdir) ${FILESDIR}/eselect.cblas acml
	eselect lapack add $(get_libdir) ${FILESDIR}/eselect.lapack acml
}

pkg_postinst() {
	if [[ -z "$(eselect blas show)" ]]; then
		eselect blas set acml
	fi
	if [[ -z "$(eselect cblas show)" ]]; then
		eselect cblas set acml
	fi
	if [[ -z "$(eselect lapack show)" ]]; then
		eselect lapack set acml
	fi

	elog "To use ACML's BLAS features, you have to issue (as root):"
	elog "\n\teselect blas set acml"
	elog "To use ACML's CBLAS features, you have to issue (as root):"
	elog "\n\teselect cblas set acml"
	elog "To use ACML's LAPACK features, you have to issue (as root):"
	elog "\n\teselect lapack set acml"
}