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# Copyright 1999-2025 Gentoo Authors
# Distributed under the terms of the GNU General Public License v2
EAPI=8
inherit flag-o-matic fortran-2 toolchain-funcs
MY_P=OpenBLAS-${PV}
DESCRIPTION="Optimized BLAS library based on GotoBLAS2"
HOMEPAGE="https://github.com/OpenMathLib/OpenBLAS"
SRC_URI="https://github.com/OpenMathLib/OpenBLAS/releases/download/v${PV}/${MY_P}.tar.gz"
S="${WORKDIR}"/${MY_P}
LICENSE="BSD"
SLOT="0"
KEYWORDS="amd64 arm arm64 ~loong ppc ppc64 ~riscv x86 ~x64-macos"
IUSE="cpudetection eselect-ldso index64 openmp pthread relapack test"
REQUIRED_USE="?? ( openmp pthread )"
RESTRICT="!cpudetection? ( bindist ) !test? ( test )"
RDEPEND="
eselect-ldso? (
>=app-eselect/eselect-blas-0.2
>=app-eselect/eselect-lapack-0.2
)
"
BDEPEND="virtual/pkgconfig"
PATCHES=(
"${FILESDIR}/${PN}-0.3.29-shared-blas-lapack.patch"
# 960514 replace by upstream fix in next release. Which reverts to worse cmake-config files.
# https://github.com/OpenMathLib/OpenBLAS/issues/5387
# https://github.com/OpenMathLib/OpenBLAS/pull/5391
"${FILESDIR}/${P}-cmake_libdir.patch"
# https://github.com/OpenMathLib/OpenBLAS/pull/5378
"${FILESDIR}/${P}-lunar-lake.patch"
# https://github.com/OpenMathLib/OpenBLAS/pull/5360
"${FILESDIR}/${P}-arm-assembly.patch"
# https://github.com/OpenMathLib/OpenBLAS/pull/5303
"${FILESDIR}/${P}-enomem-check.patch"
)
pkg_pretend() {
[[ ${MERGE_TYPE} != binary ]] && use openmp && tc-check-openmp
elog "This software has a massive number of options that"
elog "are configurable and it is *impossible* for all of"
elog "those to fit inside any manageable ebuild."
elog "The Gentoo provided package has enough to build"
elog "a fully optimized library for your targeted CPU."
elog "You can set the CPU target using the environment"
elog "variable - OPENBLAS_TARGET or it will be detected"
elog "automatically from the target toolchain (supports"
elog "cross compilation toolchains)."
elog "You can control the maximum number of threads"
elog "using OPENBLAS_NTHREAD, default=64 and number of "
elog "parallel calls to allow before further calls wait"
elog "using OPENBLAS_NPARALLEL, default=8."
}
pkg_setup() {
[[ ${MERGE_TYPE} != binary ]] && use openmp && tc-check-openmp
fortran-2_pkg_setup
}
src_prepare() {
default
# TODO: Unbundle lapack like Fedora does?
# https://src.fedoraproject.org/rpms/openblas/blob/rawhide/f/openblas-0.2.15-system_lapack.patch
# Don't build the tests as part of "make all". We'll do
# it explicitly later if the test phase is enabled.
sed -i -e "/^all :: tests/s: tests::g" Makefile || die
# If 64bit-index is needed, create second library with LIBPREFIX=libopenblas64
if use index64; then
cp -aL "${S}" "${S}-index64" || die
fi
}
src_configure() {
# List of most configurable options is in Makefile.rule.
# Not an easy fix, https://github.com/xianyi/OpenBLAS/issues/4128
filter-lto
tc-export CC FC LD AR AS RANLIB
# HOSTCC is used for scripting
export HOSTCC="$(tc-getBUILD_CC)"
# Threading options
export USE_THREAD=0
export USE_OPENMP=0
if use openmp; then
USE_THREAD=1
USE_OPENMP=1
elif use pthread; then
USE_THREAD=1
USE_OPENMP=0
fi
# Disable submake with -j and default optimization flags in Makefile.system
# Makefile.rule says to not modify COMMON_OPT/FCOMMON_OPT...
export MAKE_NB_JOBS=-1 COMMON_OPT=" " FCOMMON_OPT=" "
# Target CPU ARCH options generally detected automatically from cross toolchain
if use cpudetection ; then
export DYNAMIC_ARCH=1 NO_AFFINITY=1 TARGET=GENERIC
fi
case $(tc-get-ptr-size) in
4)
# NUM_BUFFERS = MAX(50, (2*NUM_PARALLEL*NUM_THREADS)
# BUFFER_SIZE = (16 << 20) (on x86)
# NUM_BUFFERS * BUFFER_SIZE is allocated and must be
# <4GiB on 32-bit arches (bug #967251).
#
# Scale down to 2*8*(16 << 20) = 256MiB for 32-bit
# arches. This avoids spinning in blas_memory_alloc
# which doesn't handle ENOMEM.
export NUM_PARALLEL=${OPENBLAS_NPARALLEL:-2}
export NUM_THREADS=${OPENBLAS_NTHREAD:-8}
;;
8)
# XXX: The current values here rely on overcommit
# for most systems (bug #967026).
export NUM_PARALLEL=${OPENBLAS_NPARALLEL:-8}
export NUM_THREADS=${OPENBLAS_NTHREAD:-64}
;;
*)
die "Unexpected tc-get-ptr-size. Please file a bug."
;;
esac
# Allow setting OPENBLAS_TARGET to override auto detection in case the
# toolchain is not enough to detect.
# https://github.com/xianyi/OpenBLAS/blob/develop/TargetList.txt
if ! use cpudetection ; then
if [[ -n "${OPENBLAS_TARGET}" ]] ; then
export TARGET="${OPENBLAS_TARGET}"
elif [[ ${CBUILD} != ${CHOST} ]] ; then
case ${CHOST} in
aarch64-*)
export TARGET="ARMV8"
export BINARY="64"
;;
powerpc64le-*)
export TARGET="POWER8"
export BUILD_BFLOAT16=1
export BINARY=64
;;
esac
fi
fi
export NO_STATIC=1
export BUILD_RELAPACK=$(usex relapack 1 0)
export PREFIX="${EPREFIX}/usr"
}
emake64() {
emake -C "${S}-index64" \
INTERFACE64=1 \
LIBNAMESUFFIX=64 \
"${@}"
}
src_compile() {
emake shared
use eselect-ldso && emake -C interface shared-blas-lapack
if use index64; then
emake64 shared
fi
}
src_test() {
emake tests
if use index64; then
emake64 tests
fi
}
src_install() {
local libdir=$(get_libdir)
emake install \
DESTDIR="${D}" \
OPENBLAS_INCLUDE_DIR='$(PREFIX)'/include/openblas \
OPENBLAS_LIBRARY_DIR='$(PREFIX)'/${libdir}
dodoc GotoBLAS_*.txt *.md Changelog.txt
if use index64; then
emake64 install \
DESTDIR="${D}" \
OPENBLAS_INCLUDE_DIR='$(PREFIX)'/include/openblas64 \
OPENBLAS_LIBRARY_DIR='$(PREFIX)'/${libdir}
fi
if use eselect-ldso; then
exeinto /usr/${libdir}/blas/openblas/
doexe interface/lib{,c}blas.so.3
dosym libblas.so.3 /usr/${libdir}/blas/openblas/libblas.so
dosym libcblas.so.3 /usr/${libdir}/blas/openblas/libcblas.so
exeinto /usr/${libdir}/lapack/openblas/
doexe interface/liblapack{,e}.so.3
dosym liblapack.so.3 /usr/${libdir}/lapack/openblas/liblapack.so
dosym liblapacke.so.3 /usr/${libdir}/lapack/openblas/liblapacke.so
fi
}
pkg_postinst() {
use eselect-ldso || return
local libdir=$(get_libdir) me="openblas"
# check blas
eselect blas add ${libdir} "${EROOT}"/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} ${me}
elog "Current eselect: BLAS/CBLAS ($libdir) -> [${current_blas}]."
else
elog "Current eselect: BLAS/CBLAS ($libdir) -> [${current_blas}]."
elog "To use blas [${me}] implementation, you have to issue (as root):"
elog "\t eselect blas set ${libdir} ${me}"
fi
# check lapack
eselect lapack add ${libdir} "${EROOT}"/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() {
if use eselect-ldso; then
eselect blas validate
eselect lapack validate
fi
}
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