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# Copyright 1999-2026 Gentoo Authors
# Distributed under the terms of the GNU General Public License v2
EAPI=8
inherit unpacker
# You can find the version suffix in:
# https://apt.repos.intel.com/oneapi/dists/all/main/binary-amd64/Packages.bz2
PN_VER=$(ver_cut 1-2)
MY_PV=$(ver_cut 1-3)-$(ver_cut 4)
DESCRIPTION="Intel Math Kernel Library"
HOMEPAGE="https://www.intel.com/content/www/us/en/developer/tools/oneapi/onemkl.html"
# Upstream packages are a mess -- and most of them are literally empty.
SRC_URI="
https://apt.repos.intel.com/oneapi/pool/main/intel-oneapi-mkl-core-${PN_VER}-${MY_PV}_amd64.deb
https://apt.repos.intel.com/oneapi/pool/main/intel-oneapi-mkl-core-devel-${PN_VER}-${MY_PV}_amd64.deb
https://apt.repos.intel.com/oneapi/pool/main/intel-oneapi-mkl-classic-include-${PN_VER}-${MY_PV}_amd64.deb
"
S="${WORKDIR}"
LICENSE="ISSL"
SLOT="0/3"
KEYWORDS="~amd64"
IUSE="eselect-ldso examples gnu-openmp llvm-openmp static-libs tbb"
RESTRICT="strip"
RDEPEND="
eselect-ldso? (
app-eselect/eselect-blas
app-eselect/eselect-lapack
)
gnu-openmp? ( sys-devel/gcc:*[openmp] )
llvm-openmp? ( llvm-runtimes/openmp )
tbb? ( dev-cpp/tbb )
"
# bug #801460
BDEPEND="
app-arch/xz-utils[extra-filters(+)]
eselect-ldso? (
app-eselect/eselect-blas
app-eselect/eselect-lapack
)
"
QA_PREBUILT="*"
QA_TEXTRELS="*"
QA_SONAME="*"
src_install() {
local libdir=$(get_libdir)
local libroot=opt/intel/oneapi/mkl/${PN_VER}/lib
if ! use static-libs; then
rm -v "${libroot}"/{*.a,pkgconfig/*-static-*.pc} || die
fi
if ! use examples; then
rm -rv "opt/intel/oneapi/mkl/${PN_VER}"/share/{mkl/benchmarks,doc/mkl/examples} || die
fi
if ! use gnu-openmp; then
rm -v "${libroot}"/{*_gnu_thread.*,pkgconfig/*-gomp.pc} || die
fi
if use llvm-openmp; then
# Replace Intel OpenMP with LLVM OpenMP. We could just install
# "openmp.pc" for that, but we don't want random packages
# to start depending on it.
sed -e '/Requires: openmp/d' \
-e '/Libs:/s:$: -lomp:' \
-i "${libroot}"/pkgconfig/*iomp.pc || die
# Install a "libiomp5.so" symlink to make the magical lookup
# in mkl_rt.so happy too.
ln -s "../../../../../../usr/$(get_libdir)/libomp.so" \
"${libroot}"/libiomp5.so || die
else
rm -v "${libroot}"/{*_intel_thread.*,pkgconfig/*-iomp.pc} || die
fi
if ! use tbb; then
rm -v "${libroot}"/{*_tbb_thread.*,pkgconfig/*-tbb.pc} || die
fi
# Symlink pkgconfig and cmake files
pushd "${libroot}/pkgconfig" >/dev/null || die
for file in *.pc; do
dosym "../../../${libroot}/pkgconfig/${file}" \
"/usr/${libdir}/pkgconfig/${file}"
done
popd >/dev/null || die
pushd "${libroot}/cmake/mkl" >/dev/null || die
for file in *.cmake; do
dosym "../../../../${libroot}/cmake/mkl/${file}" \
"/usr/${libdir}/cmake/mkl/${file}"
done
popd >/dev/null || die
# Move everything over to the image directory
mv "${S}/"* "${ED}" || die
# Create convenience symlink that does not include the version number
dosym "${PN_VER}" /opt/intel/oneapi/mkl/latest
if use eselect-ldso; then
local lib=../../../../${libroot}/libmkl_rt.so
dodir "/usr/${libdir}"/{blas,lapack}/mkl
dosym "${lib}" "/usr/${libdir}/blas/mkl/libblas.so"
dosym "${lib}" "/usr/${libdir}/blas/mkl/libblas.so.3"
dosym "${lib}" "/usr/${libdir}/blas/mkl/libcblas.so"
dosym "${lib}" "/usr/${libdir}/blas/mkl/libcblas.so.3"
dosym "${lib}" "/usr/${libdir}/lapack/mkl/liblapack.so"
dosym "${lib}" "/usr/${libdir}/lapack/mkl/liblapack.so.3"
dosym "${lib}" "/usr/${libdir}/lapack/mkl/liblapacke.so"
dosym "${lib}" "/usr/${libdir}/lapack/mkl/liblapacke.so.3"
fi
# https://www.intel.com/content/www/us/en/docs/onemkl/developer-guide-linux/2025-1/dynamic-select-the-interface-and-threading-layer.html
local default_threading_layer
if use llvm-openmp; then
default_threading_layer=INTEL
elif use gnu-openmp; then
default_threading_layer=GNU
elif use tbb; then
default_threading_layer=TBB
else
default_threading_layer=SEQUENTIAL
fi
newenvd - "70intel-mkl" <<-_EOF_
MKLROOT="${EPREFIX}/opt/intel/oneapi/mkl/${PN_VER}"
PATH="${EPREFIX}/opt/intel/oneapi/mkl/${PN_VER}/bin"
# we need to duplicate it in ROOTPATH for Portage to respect...
ROOTPATH="${EPREFIX}/opt/intel/oneapi/mkl/${PN_VER}/bin"
LDPATH="${EPREFIX}/opt/intel/oneapi/mkl/${PN_VER}/lib"
# respect USE flags for defaults
MKL_THREADING_LAYER=${default_threading_layer}
_EOF_
}
pkg_postinst() {
use eselect-ldso || return
local libdir=$(get_libdir) me="mkl"
# 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) -> [${current_blas}]."
else
elog "Current eselect: LAPACK ($libdir) -> [${current_blas}]."
elog "To use lapack [${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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