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# Copyright 1999-2026 Gentoo Authors
# Distributed under the terms of the GNU General Public License v2
EAPI=8
ROCM_SKIP_GLOBALS=1
inherit cmake edob rocm flag-o-matic
DESCRIPTION="ROCm Communication Collectives Library (RCCL)"
HOMEPAGE="https://github.com/ROCm/rocm-systems/tree/develop/projects/rccl"
SRC_URI="https://github.com/ROCm/rocm-systems/releases/download/therock-${PV%.0}/rccl.tar.gz -> ${P}.tar.gz"
S="${WORKDIR}/rccl"
LICENSE="BSD"
SLOT="0/$(ver_cut 1-2)"
KEYWORDS="~amd64"
# DEFAULT_GPUS from CMakeLists.txt
IUSE_TARGETS=(
gfx906 gfx908 gfx90a gfx942 gfx950 gfx1030
gfx1100 gfx1101 gfx1102 gfx1151 gfx1200 gfx1201
)
IUSE_TARGETS=( "${IUSE_TARGETS[@]/#/amdgpu_targets_}" )
ROCM_USEDEP_OPTFLAGS=${IUSE_TARGETS[*]/%/(-)?}
ROCM_USEDEP=${ROCM_USEDEP_OPTFLAGS// /,}
ROCM_REQUIRED_USE=" || ( ${IUSE_TARGETS[*]} )"
IUSE="${IUSE_TARGETS[*]/#/+} roctracer test"
REQUIRED_USE="${ROCM_REQUIRED_USE}"
RDEPEND="
dev-libs/rocm-core:${SLOT}
dev-util/hip:${SLOT}
dev-util/amdsmi:${SLOT}
roctracer? ( dev-util/roctracer:${SLOT} )
"
DEPEND="${RDEPEND}
sys-libs/binutils-libs
dev-libs/libfmt:=
"
BDEPEND="
dev-build/rocm-cmake:${SLOT}
dev-util/hipify-clang:${SLOT}
test? ( dev-cpp/gtest )"
RESTRICT="!test? ( test )"
PATCHES=(
"${FILESDIR}"/${P}-no-roctx.patch
"${FILESDIR}"/${P}-llvm-23-gfx942.patch
)
src_prepare() {
# libstdc++ visibility workaround includes a libstdc++-internal header; <cstddef> includes
# it with libstdc++ (__has_include does not help: clang's cuda_wrappers provide a wrapper)
sed -e 's:^#include <bits/c++config.h>$:#include <cstddef>:' -i src/include/nccl_common.h || die
# libc++ does not include <chrono> transitively
sed -e "/#include <thread>/i #include <chrono>" -i test/common/TestBedChild.cpp || die
# std::memcpy in a kernel resolves to the host function with libc++
sed -e "s/std::memcpy(/__builtin_memcpy(/" -i test/device/TestOp128.cpp || die
# allow to redefine CMAKE_INSTALL_LIBDIR from lib to $(get_libdir)
sed -e '/CMAKE_INSTALL_LIBDIR/ s/ FORCE//' -i cmake/Dependencies.cmake || die
cmake_src_prepare
}
src_configure() {
rocm_use_clang
# lto flags make compilation fail with "undefined hidden symbol"
filter-lto
local mycmakeargs=(
-DCMAKE_SKIP_RPATH=ON
-DGPU_TARGETS="$(get_amdgpu_flags)"
-DBUILD_TESTS=$(usex test ON OFF)
-DROCM_SYMLINK_LIBS=OFF
-DROCM_PATH="${EPREFIX}/usr"
-DCMAKE_INSTALL_LIBDIR="$(get_libdir)"
-DRCCL_ROCPROFILER_REGISTER=OFF
-DROCTX=$(usex roctracer ON OFF)
-DEXPLICIT_ROCM_VERSION="${PV}"
-Wno-dev
)
cmake_src_configure
}
src_test() {
check_amdgpu
cd "${BUILD_DIR}" || die
# APU (as second device, if any) expectedly breaks tests
HIP_VISIBLE_DEVICES=0 LD_LIBRARY_PATH="${BUILD_DIR}" edob test/rccl-UnitTests
}
src_install() {
cmake_src_install
# don't install tests
if use test; then
rm -r "${ED}"/usr/bin/{rccl,rccl-UnitTests*,librccl-test-profiler-stub.so} || die
fi
}
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