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# Copyright 2021 Gentoo Authors
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# Distributed under the terms of the GNU General Public License v2
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EAPI=8
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PYTHON_COMPAT=( python3_{8..10} )
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inherit estack linux-info optfeature python-any-r1 toolchain-funcs
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MY_PV="${PV/_/-}"
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MY_PV="${MY_PV/-pre/-git}"
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DESCRIPTION="Tool for inspection and simple manipulation of eBPF programs and maps"
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HOMEPAGE="https://kernel.org/"
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LINUX_V="${PV:0:1}.x"
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LINUX_VER=$(ver_cut 1-2)
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LINUX_PATCH=patch-${PV}.xz
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SRC_URI="https://www.kernel.org/pub/linux/kernel/v${LINUX_V}/${LINUX_PATCH}"
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LINUX_SOURCES="linux-${LINUX_VER}.tar.xz"
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SRC_URI+=" https://www.kernel.org/pub/linux/kernel/v${LINUX_V}/${LINUX_SOURCES}"
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S_K="${WORKDIR}/linux-${LINUX_VER}"
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S="${S_K}/tools/bpf/bpftool"
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LICENSE="GPL-2"
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SLOT="0"
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KEYWORDS="amd64 ~x86"
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IUSE="caps"
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RDEPEND="
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sys-libs/binutils-libs:=
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sys-libs/zlib:=
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virtual/libelf:=
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caps? ( sys-libs/libcap:= )
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"
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DEPEND="
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${RDEPEND}
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>=sys-kernel/linux-headers-5.8
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"
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BDEPEND="
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${LINUX_PATCH+dev-util/patchutils}
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${PYTHON_DEPS}
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dev-python/docutils
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"
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CONFIG_CHECK="~DEBUG_INFO_BTF"
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# src_unpack and src_prepare are copied from dev-util/perf since
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# it's building from the same tarball, please keep it in sync with perf
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src_unpack() {
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local paths=(
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tools/bpf kernel/bpf
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tools/{arch,build,include,lib,perf,scripts} {scripts,include,lib} "arch/*/lib"
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)
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# We expect the tar implementation to support the -j option (both
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# GNU tar and libarchive's tar support that).
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echo ">>> Unpacking ${LINUX_SOURCES} (${paths[*]}) to ${PWD}"
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tar --wildcards -xpf "${DISTDIR}"/${LINUX_SOURCES} \
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"${paths[@]/#/linux-${LINUX_VER}/}" || die
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if [[ -n ${LINUX_PATCH} ]] ; then
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eshopts_push -o noglob
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ebegin "Filtering partial source patch"
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filterdiff -p1 ${paths[@]/#/-i } -z "${DISTDIR}"/${LINUX_PATCH} \
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> ${P}.patch
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eend $? || die "filterdiff failed"
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eshopts_pop
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fi
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local a
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for a in ${A}; do
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[[ ${a} == ${LINUX_SOURCES} ]] && continue
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[[ ${a} == ${LINUX_PATCH} ]] && continue
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unpack ${a}
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done
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}
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src_prepare() {
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default
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if [[ -n ${LINUX_PATCH} ]] ; then
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pushd "${S_K}" >/dev/null || die
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eapply "${WORKDIR}"/${P}.patch
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popd || die
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fi
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# dev-python/docutils installs rst2man.py, not rst2man
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sed -i -e 's/rst2man/rst2man.py/g' Documentation/Makefile || die
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}
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bpftool_make() {
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local arch=$(tc-arch-kernel)
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tc-export AR CC LD
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emake V=1 VF=1 \
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HOSTCC="$(tc-getBUILD_CC)" HOSTLD="$(tc-getBUILD_LD)" \
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EXTRA_CFLAGS="${CFLAGS}" ARCH="${arch}" BPFTOOL_VERSION="${MY_PV}" \
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prefix="${EPREFIX}"/usr \
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feature-libcap="$(usex caps 1 0)" \
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"$@"
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}
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src_compile() {
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bpftool_make
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bpftool_make -C Documentation
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}
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src_install() {
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bpftool_make DESTDIR="${D}" install
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bpftool_make mandir="${ED}"/usr/share/man -C Documentation install
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}
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pkg_postinst() {
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optfeature "clang-bpf-co-re support" sys-devel/clang[llvm_targets_BPF]
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}
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