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# Copyright 1999-2014 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2

EAPI=5

FORTRAN_NEEDED=fortran

inherit eutils fortran-2 toolchain-funcs

DESCRIPTION="Parallel matrix preconditioners library"
HOMEPAGE="http://acts.nersc.gov/hypre/"
SRC_URI="https://computation.llnl.gov/casc/hypre/download/${P}.tar.gz"

LICENSE="LGPL-2.1"
SLOT="0/${PV}"
KEYWORDS="~amd64 ~x86 ~amd64-linux ~x86-linux"
IUSE="doc examples fortran mpi"

RDEPEND="
	sci-libs/superlu:0=
	virtual/blas
	virtual/lapack
	mpi? ( virtual/mpi )"
DEPEND="${RDEPEND}
	virtual/pkgconfig"

DOCS=( "${WORKDIR}"/${P}/{CHANGELOG,COPYRIGHT,README} )

S="${WORKDIR}/${P}/src"

src_prepare() {
	# link with system superlu and propagate LDFLAGS
	sed -i \
		-e 's:@LIBS@:@LIBS@ -lsuperlu:' \
		-e 's:_SHARED@:_SHARED@ $(LDFLAGS):g' \
		config/Makefile.config.in || die
	sed -i \
		-e '/HYPRE_ARCH/s: = :=:g' \
		configure || die
	# link with system blas and lapack
	sed -i \
		-e '/^BLASFILES/d' \
		-e '/^LAPACKFILES/d' \
		lib/Makefile || die
	use mpi && export CC=mpicc CXX=mpicxx FC=mpif77
	tc-export CC CXX
}

src_configure() {
	local myeconfargs=(
		--enable-shared
		--without-superlu
		--with-blas-libs="$($(tc-getPKG_CONFIG) --libs-only-l blas | sed -e 's/-l//g')"
		--with-blas-lib-dirs="$($(tc-getPKG_CONFIG) --libs-only-L blas | sed -e 's/-L//g')"
		--with-lapack-libs="$($(tc-getPKG_CONFIG) --libs-only-l lapack | sed -e 's/-l//g')"
		--with-lapack-lib-dirs="$($(tc-getPKG_CONFIG) --libs-only-L lapack | sed -e 's/-L//g')"
		$(use_enable fortran)
		$(use_with mpi MPI)
	)
	econf "${myeconfargs[@]}"
}

src_install() {
	dolib.so hypre/lib/lib*
	insinto /usr/include/hypre
	doins -r hypre/include/*

	use doc && dodoc "${WORKDIR}"/${P}/docs/*.pdf
	if use examples; then
		insinto /usr/share/doc/${PF}
		doins -r examples
	fi
}