# Copyright 1999-2007 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2
# $Header: /var/cvsroot/gentoo-x86/sci-libs/gsl/gsl-1.10.ebuild,v 1.2 2007/10/11 16:55:45 bicatali Exp $

inherit eutils flag-o-matic toolchain-funcs autotools

DESCRIPTION="The GNU Scientific Library"
HOMEPAGE="http://www.gnu.org/software/gsl/"
SRC_URI="mirror://gnu/${PN}/${P}.tar.gz"

LICENSE="GPL-3"
SLOT="0"
KEYWORDS="~alpha ~amd64 ~ppc ~ppc64  ~sparc ~x86 ~x86-fbsd"
IUSE="cblas"

RDEPEND="app-admin/eselect-cblas
	cblas? ( virtual/cblas )"

DEPEND="${RDEPEND}
	dev-util/pkgconfig"

pkg_setup() {
	# icc-10.0.026 did not pass rng tests (last check: gsl-1.10)
	if [[ $(tc-getCC) == icc ]]; then
		eerror "icc known to fail tests. Revert to safer compiler and re-emerge."
		die "gsl does not work when compiled with icc"
	fi
}

src_unpack() {
	unpack ${A}
	cd "${S}"
	epatch "${FILESDIR}"/gsl-cblas.patch
	eautoreconf
}

src_compile() {
	# could someone check if they are still needed?
	replace-cpu-flags k6 k6-2 k6-3 i586
	filter-flags -ffast-math
	local myconf=
	use cblas && myconf="--with-cblas=$(pkg-config --libs cblas)"
	econf "${myconf}"|| die "econf failed"
	emake || die "emake failed"
}

src_install() {
	emake install DESTDIR="${D}" || die "emake install failed."
	dodoc AUTHORS BUGS ChangeLog NEWS README SUPPORT \
		THANKS TODO || die "dodoc failed"

	# take care of pkgconfig file for cblas implementation.
	sed -e "s/@LIBDIR@/$(get_libdir)/" \
		-e "s/@PV@/${PV}/" \
		"${FILESDIR}"/cblas.pc.in > cblas.pc \
		|| die "sed cblas.pc failed"
	insinto /usr/$(get_libdir)/blas/gsl
	doins cblas.pc || die "installing cblas.pc failed"
	ESELECT_PROF=gsl
	eselect cblas add $(get_libdir) "${FILESDIR}"/eselect.cblas.gsl ${ESELECT_PROF}
}

pkg_postinst() {
	local p=cblas
	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
}