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# Copyright 2022-2025 Gentoo Authors
# Distributed under the terms of the GNU General Public License v2
EAPI=8
DISTUTILS_USE_PEP517=setuptools
PYTHON_COMPAT=( python3_{11..13} )
DISTUTILS_SINGLE_IMPL=1
DISTUTILS_EXT=1
inherit distutils-r1 prefix
DESCRIPTION="Tensors and Dynamic neural networks in Python"
HOMEPAGE="https://pytorch.org/"
SRC_URI="https://github.com/pytorch/${PN}/archive/refs/tags/v${PV}.tar.gz
-> ${P}.tar.gz"
LICENSE="BSD"
SLOT="0"
KEYWORDS="~amd64 ~arm64"
RESTRICT="test"
REQUIRED_USE=${PYTHON_REQUIRED_USE}
RDEPEND="
${PYTHON_DEPS}
~sci-ml/caffe2-${PV}[${PYTHON_SINGLE_USEDEP}]
$(python_gen_cond_dep '
dev-python/sympy[${PYTHON_USEDEP}]
dev-python/typing-extensions[${PYTHON_USEDEP}]
')
"
DEPEND="${RDEPEND}
$(python_gen_cond_dep '
dev-python/pyyaml[${PYTHON_USEDEP}]
')
"
PATCHES=(
"${FILESDIR}"/${PN}-2.6.0-dontbuildagain.patch
"${FILESDIR}"/${PN}-2.7.1-cpp-extension-libcxx.patch
"${FILESDIR}"/${PN}-2.7.1-cpp-extension-multilib.patch
)
src_prepare() {
# Replace placeholders added by cpp-extension.patch
sed -e "s|%LIB_DIR%|$(get_libdir)|g" \
-i torch/utils/cpp_extension.py || die
# Set build dir for pytorch's setup
sed -e "/BUILD_DIR/s|build|/var/lib/caffe2/|" \
-i tools/setup_helpers/env.py || die
# Drop legacy from pyproject.toml
sed -e "/build-backend/s|:__legacy__||" \
-i pyproject.toml || die
distutils-r1_src_prepare
# Get object file from caffe2
cp "${ESYSROOT}"/var/lib/caffe2/functorch.so functorch/functorch.so || die
hprefixify tools/setup_helpers/env.py
}
python_compile() {
PYTORCH_BUILD_VERSION=${PV} \
PYTORCH_BUILD_NUMBER=0 \
USE_SYSTEM_LIBS=ON \
CMAKE_BUILD_DIR="${BUILD_DIR}" \
distutils-r1_python_compile develop sdist
}
python_install() {
USE_SYSTEM_LIBS=ON distutils-r1_python_install
}
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