# Copyright 1999-2009 Gentoo Foundation

# Distributed under the terms of the GNU General Public License v2

# $Header: /var/cvsroot/gentoo-x86/sci-libs/blas-goto/blas-goto-1.26.ebuild,v 1.2 2009/08/18 14:22:19 bicatali Exp $

inherit eutils fortran flag-o-matic toolchain-funcs

EAPI="2"

MY_PN="GotoBLAS2"

MY_P="${MY_PN}-${PV}"

DESCRIPTION="Fast implementations of the Basic Linear Algebra Subroutines"

HOMEPAGE="http://www.tacc.utexas.edu/research-development/tacc-projects/"

SRC_URI="${MY_P}.tar.gz"

LICENSE="tacc"

SLOT="0"

KEYWORDS="~x86 ~amd64"

IUSE="int64 threads doc openmp"

RESTRICT="fetch"

DOWNLOAD_URL="${HOMEPAGE}"

RDEPEND="app-admin/eselect-blas

	doc? ( app-doc/blas-docs )

	openmp? ( >=sys-devel/gcc-4.3[openmp] )"

DEPEND="app-admin/eselect-blas

	>=sys-devel/binutils-2.17"

S="${WORKDIR}/${MY_PN}"

FORTRAN="gfortran g77 ifc"

ESELECT_PROF=goto

pkg_nofetch() {

	einfo "Please download ${SRC_URI} from"

	einfo "${DOWNLOAD_URL}"

	einfo "and place it in ${DISTDIR}."

}

src_unpack() {

	unpack ${A}

	cd "${S}"

	# patch to link with m and fortran libs, works with asneeded

	epatch "${FILESDIR}"/${P}-sharedlibs.patch

	# Get and test C (cross-) compiler

	C_COMPILER=$(tc-getCC)	

	if [[ $(tc-getCC) != *gcc ]]; then

		ewarn "Your C compiler is set to $(tc-getCC)."

		ewarn "${PN} needs gcc to inline assembler, others compilers have reported failures."

		die "Incompatible C compiler, need gcc."

	fi

	# Get Fortran compiler

	case ${FORTRANC} in

		g77) F_COMPILER=G77;;

		gfortran) F_COMPILER=GFORTRAN;;

		ifc|ifort) F_COMPILER=INTEL;;

		*)

			die "Invalid Fortran compiler: ${FORTRANC}; valid are ${FORTRAN}."

	esac

	# Set compilers

	sed -i \

		-e "s:^# \(CC\s*=\).*:\1 ${C_COMPILER}:g" \

		-e "s:^# \(FC\s*=\).*:\1 ${F_COMPILER}:g" \

		Makefile.rule \

		|| die "sed for compilers failed"

	# Set Threads

	use threads && THREADS=1 || THREADS=0

	sed -i \

		-e "s:^# \(USE_THREAD\s*=\).*:\1 ${THREADS}:g" \

		Makefile.rule \

		|| die "sed for threads failed"

	# Set BINARY

	use amd64 && BINARY=64 || BINARY=32

	sed -i \

		-e "s:^# \(BINARY\s*=\).*:\1 ${BINARY}:g" \

		Makefile.rule \

		|| die "sed for binary failed"

	# Set integer interface

	use int64 && INT64=1 || INT64=0

	use int64 && ESELECT_PROF="${ESELECT_PROF}-int64"

	sed -i \

		-e "s:^# \(INTERFACE64\s*=\).*:\1 ${INT64}:g" \

		Makefile.rule \

		|| die "sed for 64 integers failed"

	# Set OpenMP

	use openmp && OPENMP=1 || OPENMP=0

	sed -i \

		-e "s:^# \(USE_OPENMP\s*=\).*:\1 ${OPENMP}:g" \

		Makefile.rule \

		|| die "sed for 64 binary failed"

}

src_compile() {

	# Make static library

	emake LDFLAGS="$(raw-ldflags)" || die "emake failed"

	# Make shared library

	cd exports

	emake so -j1 || die "emake failed"

}

src_test() {

	cd test

	emake || die "emake test failed"

	make clean

}

src_install() {

	local install_dir=/usr/$(get_libdir)/blas/goto

	dodir ${install_dir}

	# dolib.so doesn't support our alternate locations

	exeinto ${install_dir}

	doexe libgoto2_*.so || die "installing shared lib failed"

	dosym libgoto2_*.so ${install_dir}/libgoto2.so

	dosym libgoto2_*.so ${install_dir}/libgoto2.so.0

	dosym libgoto2_*.so ${install_dir}/libgoto2.so.0.0.0

	# dolib.a doesn't support our alternate locations

	insinto ${install_dir}

	doins libgoto2_*.a || die "installing static lib failed"

	dosym libgoto2_*.a ${install_dir}/libgoto2.a

	dodoc 01Readme.txt 03FAQ.txt || die

	cp "${FILESDIR}"/blas.pc.in blas.pc

	local extlibs=""

	use threads && extlibs="${extlibs} -lpthread"

	sed -i \

		-e "s/@LIBDIR@/$(get_libdir)/" \

		-e "s/@PV@/${PV}/" \

		-e "s/@EXTLIBS@/${extlibs}/" \

		blas.pc || die "sed blas.pc failed"

	insinto /usr/$(get_libdir)/blas/goto

	doins blas.pc

	eselect blas add $(get_libdir) "${FILESDIR}"/eselect.blas.goto ${ESELECT_PROF}

}

pkg_postinst() {

	local p=blas

	local current_lib=$(eselect ${p} show | cut -d' ' -f2)

	if [[ ${current_lib} == ${ESELECT_PROF} || -z ${current_lib} ]]; then

		# work around eselect bug #189942

		local configfile="${ROOT}"/etc/env.d/${p}/$(get_libdir)/config

		[[ -e ${configfile} ]] && rm -f ${configfile}

		eselect ${p} set ${ESELECT_PROF}

		elog "${p} has been eselected to ${ESELECT_PROF}"

	else

		elog "Current eselected ${p} is ${current_lib}"

		elog "To use ${p} ${ESELECT_PROF} implementation, you have to issue (as root):"

		elog "\t eselect ${p} set ${ESELECT_PROF}"

	fi

}