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# Copyright 1999-2025 Gentoo Authors
# Distributed under the terms of the GNU General Public License v2
EAPI=8
# Some additional tests are run if Python is found
PYTHON_COMPAT=( python3_{11..14} )
inherit cmake flag-o-matic fortran-2 python-any-r1
DESCRIPTION="BLAS, CBLAS, LAPACK, LAPACKE reference implementations"
HOMEPAGE="https://www.netlib.org/lapack/"
SRC_URI="https://github.com/Reference-LAPACK/lapack/archive/v${PV}.tar.gz -> ${P}.tar.gz"
LICENSE="BSD"
SLOT="0"
KEYWORDS="~alpha amd64 arm arm64 ~hppa ~loong ~mips ppc ppc64 ~riscv ~s390 ~sparc x86 ~amd64-linux ~x86-linux ~arm64-macos ~ppc-macos ~x64-macos"
IUSE="flexiblas lapacke deprecated doc eselect-ldso index64 test"
REQUIRED_USE="flexiblas? ( deprecated !eselect-ldso )"
RESTRICT="!test? ( test )"
RDEPEND="
!app-eselect/eselect-cblas
virtual/fortran
eselect-ldso? (
>=app-eselect/eselect-blas-0.2
>=app-eselect/eselect-lapack-0.2
)
doc? ( app-doc/blas-docs )
"
DEPEND="${RDEPEND}"
BDEPEND="
virtual/pkgconfig
test? ( ${PYTHON_DEPS} )
"
PDEPEND="
flexiblas? (
sci-libs/flexiblas[system-blas(-)]
)
"
PATCHES=(
"${FILESDIR}"/${PN}-3.12.1-broken-flow.patch
"${FILESDIR}"/${PN}-3.12.1-broken-flow-deux.patch
"${FILESDIR}"/${PN}-3.12.1-broken-flow-trois.patch
"${FILESDIR}"/${PN}-3.12.1-lapack64-pc.patch
)
pkg_setup() {
fortran-2_pkg_setup
use test && python-any-r1_pkg_setup
}
src_prepare() {
cmake_src_prepare
if use flexiblas; then
# install libraries renamed to '*-reference'
sed -i -e '/set([A-Z]*LIB/s:"):-reference"):' CMakeLists.txt || die
fi
}
src_configure() {
# bug #878891
filter-lto
local mycmakeargs=(
-DCBLAS=ON
-DLAPACKE=$(usex lapacke)
-DBUILD_DEPRECATED=$(usex deprecated)
-DBUILD_SHARED_LIBS=ON
-DBUILD_TESTING=$(usex test)
-DLAPACK_TESTING_USE_PYTHON=$(usex test)
# Breaks cross
-DTEST_FORTRAN_COMPILER=OFF
)
if use flexiblas; then
mycmakeargs+=(
-DCMAKE_INSTALL_INCLUDEDIR=include/lapack-reference
# Disable the additional ILP64 symbols in LP64 libraries
# for now, to save time. FlexiBLAS cannot use them
# at the moment.
-DBUILD_INDEX64_EXT_API=OFF
)
fi
cmake_src_configure
if use index64; then
mycmakeargs+=(
-DBUILD_INDEX64=ON
)
BUILD_DIR=${BUILD_DIR}-ilp64 cmake_src_configure
fi
}
src_compile() {
cmake_src_compile
use index64 && BUILD_DIR=${BUILD_DIR}-ilp64 cmake_src_compile
}
src_install() {
cmake_src_install
use index64 && BUILD_DIR=${BUILD_DIR}-ilp64 cmake_src_install
use eselect-ldso || return
# Create private lib directory for eselect::blas (ld.so.conf)
dodir /usr/$(get_libdir)/blas/reference
dosym -r /usr/$(get_libdir)/libblas.so /usr/$(get_libdir)/blas/reference/libblas.so
dosym -r /usr/$(get_libdir)/libblas.so.3 /usr/$(get_libdir)/blas/reference/libblas.so.3
dosym -r /usr/$(get_libdir)/libcblas.so /usr/$(get_libdir)/blas/reference/libcblas.so
dosym -r /usr/$(get_libdir)/libcblas.so.3 /usr/$(get_libdir)/blas/reference/libcblas.so.3
# Create private lib directory for eselect::lapack (ld.so.conf)
dodir /usr/$(get_libdir)/lapack/reference
dosym -r /usr/$(get_libdir)/liblapack.so /usr/$(get_libdir)/lapack/reference/liblapack.so
dosym -r /usr/$(get_libdir)/liblapack.so.3 /usr/$(get_libdir)/lapack/reference/liblapack.so.3
}
pkg_postinst() {
use eselect-ldso || return
local me=reference libdir=$(get_libdir)
# check eselect-blas
eselect blas add ${libdir} "${EPREFIX}"/usr/${libdir}/blas/${me} ${me}
local current_blas=$(eselect blas show ${libdir} | cut -d' ' -f2)
if [[ ${current_blas} == ${me} || -z ${current_blas} ]]; then
eselect blas set ${libdir} ${me}
elog "Current eselect: BLAS ($libdir) -> [${current_blas}]."
else
elog "Current eselect: BLAS ($libdir) -> [${current_blas}]."
elog "To use blas [${me}] implementation, you have to issue (as root):"
elog "\t eselect blas set ${libdir} ${me}"
fi
# check eselect-lapack
eselect lapack add ${libdir} "${EPREFIX}"/usr/${libdir}/lapack/${me} ${me}
local current_lapack=$(eselect lapack show ${libdir} | cut -d' ' -f2)
if [[ ${current_lapack} == ${me} || -z ${current_lapack} ]]; then
eselect lapack set ${libdir} ${me}
elog "Current eselect: LAPACK ($libdir) -> [${current_lapack}]."
else
elog "Current eselect: LAPACK ($libdir) -> [${current_lapack}]."
elog "To use lapack [${me}] implementation, you have to issue (as root):"
elog "\t eselect lapack set ${libdir} ${me}"
fi
}
pkg_postrm() {
use eselect-ldso || return
eselect blas validate
eselect lapack validate
}
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