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# Copyright 1999-2019 Gentoo Authors
# Distributed under the terms of the GNU General Public License v2

EAPI=6

FORTRAN_NEEDED=fortran

inherit cuda eapi7-ver flag-o-matic fortran-2 java-pkg-opt-2 toolchain-funcs multilib multilib-minimal mpi

MY_P=${P/-mpi}
S=${WORKDIR}/${MY_P}

IUSE_OPENMPI_FABRICS="
	openmpi_fabrics_ofed
	openmpi_fabrics_knem
	openmpi_fabrics_psm"

IUSE_OPENMPI_RM="
	openmpi_rm_pbs
	openmpi_rm_slurm"

IUSE_OPENMPI_OFED_FEATURES="
	openmpi_ofed_features_control-hdr-padding
	openmpi_ofed_features_udcm
	openmpi_ofed_features_rdmacm
	openmpi_ofed_features_dynamic-sl"

DESCRIPTION="A high-performance message passing library (MPI)"
HOMEPAGE="http://www.open-mpi.org"
SRC_URI="http://www.open-mpi.org/software/ompi/v$(ver_cut 1-2)/downloads/${MY_P}.tar.bz2"
LICENSE="BSD"
SLOT="0"
KEYWORDS="~amd64 ~x86 ~amd64-linux"
IUSE="cma cuda cxx elibc_FreeBSD fortran heterogeneous ipv6 java romio
	${IUSE_OPENMPI_FABRICS} ${IUSE_OPENMPI_RM} ${IUSE_OPENMPI_OFED_FEATURES}"

REQUIRED_USE="openmpi_rm_slurm? ( !openmpi_rm_pbs )
	openmpi_rm_pbs? ( !openmpi_rm_slurm )
	openmpi_fabrics_psm? ( openmpi_fabrics_ofed )
	openmpi_ofed_features_control-hdr-padding? ( openmpi_fabrics_ofed )
	openmpi_ofed_features_udcm? ( openmpi_fabrics_ofed )
	openmpi_ofed_features_rdmacm? ( openmpi_fabrics_ofed )
	openmpi_ofed_features_dynamic-sl? ( openmpi_fabrics_ofed )"

MPI_UNCLASSED_DEP_STR="
	!sys-cluster/pmix
"

CDEPEND="
	>=dev-libs/libevent-2.0.22[${MULTILIB_USEDEP},threads]
	dev-libs/libltdl:0[${MULTILIB_USEDEP}]
	>=sys-apps/hwloc-2.0.2[${MULTILIB_USEDEP}]
	>=sys-libs/zlib-1.2.8-r1[${MULTILIB_USEDEP}]
	cuda? ( >=dev-util/nvidia-cuda-toolkit-6.5.19-r1:= )
	elibc_FreeBSD? ( dev-libs/libexecinfo )
	openmpi_fabrics_ofed? ( sys-fabric/ofed:* )
	openmpi_fabrics_knem? ( sys-cluster/knem )
	openmpi_fabrics_psm? ( sys-fabric/infinipath-psm:* )
	openmpi_rm_pbs? ( sys-cluster/torque )
	openmpi_rm_slurm? ( sys-cluster/slurm )
	openmpi_ofed_features_rdmacm? ( sys-fabric/librdmacm:* )
	$(mpi_imp_deplist)"

RDEPEND="${CDEPEND}
	java? ( >=virtual/jre-1.6 )"

DEPEND="${CDEPEND}
	java? ( >=virtual/jdk-1.6 )"

MULTILIB_WRAPPED_HEADERS=(
	/usr/include/mpi.h
	/usr/include/openmpi/ompi/mpi/java/mpiJava.h
)

pkg_setup() {
	fortran-2_pkg_setup
	java-pkg-opt-2_pkg_setup
	MPI_ESELECT_FILE="eselect.mpi.openmpi"

	elog
	elog "OpenMPI has an overwhelming count of configuration options."
	elog "Don't forget the EXTRA_ECONF environment variable can let you"
	elog "specify configure options if you find them necessary."
	elog
}

src_prepare() {
	default

	# Necessary for scalibility, see
	# http://www.open-mpi.org/community/lists/users/2008/09/6514.php
	echo 'oob_tcp_listen_mode = listen_thread' \
		>> opal/etc/openmpi-mca-params.conf || die
}

multilib_src_configure() {
	if use java; then
		# We must always build with the right -source and -target
		# flags. Passing flags to javac isn't explicitly supported here
		# but we can cheat by overriding the configure test for javac.
		export ac_cv_path_JAVAC="$(java-pkg_get-javac) $(java-pkg_javac-args)"
	fi

	ECONF_SOURCE=${S} econf $(mpi_econf_args) \
		--sysconfdir="${EPREFIX}/etc/${PN}" \
		--enable-pretty-print-stacktrace \
		--enable-orterun-prefix-by-default \
		--with-hwloc="${EPREFIX}/usr" \
		--with-hwloc-libdir="${EPREFIX}/usr/$(get_libdir)" \
		--with-libltdl="${EPREFIX}/usr" \
		--with-libevent="${EPREFIX}/usr" \
		--with-libevent-libdir="${EPREFIX}/usr/$(get_libdir)" \
		--enable-mpi-fortran=$(usex fortran all no) \
		$(use_enable cxx mpi-cxx) \
		$(use_with cma) \
		$(multilib_native_use_with cuda cuda "${EPREFIX}"/opt/cuda) \
		$(use_enable romio io-romio) \
		$(use_enable heterogeneous) \
		$(use_enable ipv6) \
		$(multilib_native_use_enable java mpi-java) \
		$(multilib_native_use_with openmpi_fabrics_ofed verbs "${EPREFIX}"/usr) \
		$(multilib_native_use_with openmpi_fabrics_knem knem "${EPREFIX}"/usr) \
		$(multilib_native_use_with openmpi_fabrics_psm psm "${EPREFIX}"/usr) \
		$(multilib_native_use_enable openmpi_ofed_features_control-hdr-padding openib-control-hdr-padding) \
		$(multilib_native_use_enable openmpi_ofed_features_rdmacm openib-rdmacm) \
		$(multilib_native_use_enable openmpi_ofed_features_udcm openib-udcm) \
		$(multilib_native_use_enable openmpi_ofed_features_dynamic-sl openib-dynamic-sl) \
		$(multilib_native_use_with openmpi_rm_pbs tm) \
		$(multilib_native_use_with openmpi_rm_slurm slurm)
}

multilib_src_test() {
	# Doesn't work with the default src_test as the dry run (-n) fails.
	emake -j1 check
}

multilib_src_install() {
	default

	# fortran header cannot be wrapped (bug #540508), workaround part 1
	if multilib_is_native_abi && use fortran; then
		mkdir "${T}"/fortran || die
		mv "${ED}"/$(mpi_root)/usr/include/mpif* "${T}"/fortran || die
	else
		# some fortran files get installed unconditionally
		rm \
			"${ED}"/$(mpi_root)/usr/include/mpif* \
			"${ED}"/$(mpi_root)/usr/bin/mpif* \
			|| die
	fi
}

multilib_src_install_all() {
	# fortran header cannot be wrapped (bug #540508), workaround part 2
	if use fortran; then
		mv "${T}"/fortran/mpif* "${ED}"/$(mpi_root)/usr/include || die
	fi

	# Remove la files, no static libs are installed and we have pkg-config
	find "${ED}" -name '*.la' -delete || die

	if use java; then
		local mpi_jar="${ED}"/$(mpi_root)/usr/$(get_libdir)/mpi.jar
		java-pkg_dojar "${mpi_jar}"
		# We don't want to install the jar file twice
		# so let's clean after ourselves.
		rm "${mpi_jar}" || die
	fi

	mpi_dodoc README AUTHORS NEWS VERSION
	mpi_imp_add_eselect
}