# Copyright 2019-2022 Gentoo Authors
# Distributed under the terms of the GNU General Public License v2

EAPI=8

inherit autotools

DESCRIPTION="runtime that implements the OmpSs-2 parallel programming model"
HOMEPAGE="https://github.com/bsc-pm/nanos6"
SRC_URI="https://github.com/bsc-pm/nanos6/archive/refs/tags/version-${PV}.tar.gz -> ${P}.tar.gz"
S="${WORKDIR}/${PN}-version-${PV}"

LICENSE="GPL-3"
SLOT="0"
KEYWORDS="~amd64"
IUSE="ctf2prv debug +dependency-delayed-operations dlb execution-workflow extrae mercurium papi pqos test unwind"
#jemalloc require custom jemalloc
#TODO: cuda
#TODO: llvm-libunwind

RDEPEND="
	>=dev-libs/boost-1.59:=
	sys-apps/hwloc
	sys-process/numactl
	virtual/libelf

	ctf2prv? ( dev-util/babeltrace2 )
	dlb? ( sys-cluster/dlb )
	extrae? ( sys-cluster/extrae[nanos] )
	mercurium? ( sys-cluster/mcxx[ompss2] )
	papi? ( dev-libs/papi )
	pqos? ( sys-apps/intel-cmt-cat )
	unwind? ( sys-libs/libunwind )
"
DEPEND="${RDEPEND}"

RESTRICT="!test? ( test )"
REQUIRED_USE="test? ( !mercurium )" # https://github.com/bsc-pm/nanos6/issues/3

# debug and lint variant add custom cflags
QA_FLAGS_IGNORED="
	libnanos6-debug-*.so*
	libnanos6-optimized-*-lint.so*
"

src_prepare() {
	default
	eautoreconf
}

src_configure() {
	local myconf=(
		--disable-embed-code-changes
		--disable-openacc
		--disable-static

		--enable-shared

		--with-boost="${EPREFIX}/usr"
		--with-libnuma="${EPREFIX}/usr"

		--without-git
		--without-k1om
		--without-nanos6-clang
		--without-pgi

		$(use_enable debug extra-debug)
		$(use_enable dependency-delayed-operations)
	)

	# https://github.com/bsc-pm/nanos6/issues/6
	use ctf2prv && myconf+=( "--with-babeltrace2=${EPREFIX}/usr" )
	use dlb && myconf+=( "--with-dlb=${EPREFIX}/usr" )
	use pqos && myconf+=( "--with-pqos=${EPREFIX}/usr" )

	if use extrae; then
		myconf+=( "--with-extrae=${EPREFIX}/usr" )
	else
		myconf+=( "--without-extrae" )
	fi
#	if use jemalloc; then
#		myconf+=( "--with-jemalloc=${EPREFIX}/usr" )
#	else
#		myconf+=( "--without-jemalloc" )
#	fi
	if use mercurium; then
		myconf+=( "--with-nanos6-mercurium=${EPREFIX}/usr" )
	else
		myconf+=( "--without-nanos6-mercurium" )
	fi
	if use papi; then
		myconf+=( "--with-papi=${EPREFIX}/usr" )
	else
		myconf+=( "--without-papi" )
	fi
	if use unwind; then
		myconf+=( "--with-libunwind=${EPREFIX}/usr" )
	else
		myconf+=( "--without-libunwind" )
	fi

	econf "${myconf[@]}"
}

src_install() {
	default
	dodoc CHANGELOG.md
	rm -r docs/Doxyfile* || die
	dodoc -r docs/.

	docompress -x "/usr/share/doc/${PF}/paraver-cfg"
	docompress -x "/usr/share/doc/${PF}/scripts"

	find "${ED}" -name '*.la' -delete || die
}

pkg_postinst() {
	elog "install media-gfx/graphviz and app-text/pdfjam or >=app-text/texlive-core-2021 to generate graphical representations of the dependency graph"
	elog "install sys-process/parallel to generate the graph representation in parallel"
}