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# Copyright 2021-2024 Gentoo Authors
# Distributed under the terms of the GNU General Public License v2
EAPI=8
PYTHON_COMPAT=( python3_{10..12} )
inherit estack linux-info optfeature python-any-r1 bash-completion-r1 toolchain-funcs
MY_PV="${PV/_/-}"
MY_PV="${MY_PV/-pre/-git}"
DESCRIPTION="Tool for inspection and simple manipulation of eBPF programs and maps"
HOMEPAGE="https://kernel.org/"
LINUX_V="${PV:0:1}.x"
LINUX_VER=$(ver_cut 1-2)
LINUX_PATCH=patch-${PV}.xz
SRC_URI="https://www.kernel.org/pub/linux/kernel/v${LINUX_V}/${LINUX_PATCH}"
LINUX_SOURCES="linux-${LINUX_VER}.tar.xz"
SRC_URI+=" https://www.kernel.org/pub/linux/kernel/v${LINUX_V}/${LINUX_SOURCES}"
S_K="${WORKDIR}/linux-${LINUX_VER}"
S="${S_K}/tools/bpf/bpftool"
LICENSE="GPL-2"
SLOT="0"
KEYWORDS="~amd64 ~arm ~arm64 ~loong ~ppc ~ppc64 ~riscv ~x86"
IUSE="caps +llvm"
RDEPEND="
sys-libs/binutils-libs:=
sys-libs/zlib:=
virtual/libelf:=
caps? ( sys-libs/libcap:= )
llvm? ( sys-devel/llvm:= )
"
DEPEND="
${RDEPEND}
>=sys-kernel/linux-headers-5.8
"
BDEPEND="
${LINUX_PATCH+dev-util/patchutils}
${PYTHON_DEPS}
app-arch/tar
dev-python/docutils
"
CONFIG_CHECK="~DEBUG_INFO_BTF"
# src_unpack and src_prepare are copied from dev-util/perf since
# it's building from the same tarball, please keep it in sync with perf
src_unpack() {
local paths=(
tools/bpf kernel/bpf
tools/{arch,build,include,lib,perf,scripts} {scripts,include,lib} "arch/*/lib"
)
# We expect the tar implementation to support the -j and --wildcards option
echo ">>> Unpacking ${LINUX_SOURCES} (${paths[*]}) to ${PWD}"
gtar --wildcards -xpf "${DISTDIR}"/${LINUX_SOURCES} \
"${paths[@]/#/linux-${LINUX_VER}/}" || die
if [[ -n ${LINUX_PATCH} ]] ; then
eshopts_push -o noglob
ebegin "Filtering partial source patch"
filterdiff -p1 ${paths[@]/#/-i } -z "${DISTDIR}"/${LINUX_PATCH} \
> ${P}.patch
eend $? || die "filterdiff failed"
eshopts_pop
fi
local a
for a in ${A}; do
[[ ${a} == ${LINUX_SOURCES} ]] && continue
[[ ${a} == ${LINUX_PATCH} ]] && continue
unpack ${a}
done
}
src_prepare() {
default
if [[ -n ${LINUX_PATCH} ]] ; then
pushd "${S_K}" >/dev/null || die
eapply "${WORKDIR}"/${P}.patch
popd || die
fi
# Use rst2man or rst2man.py depending on which one exists (#930076)
type -P rst2man >/dev/null || sed -i -e 's/rst2man/rst2man.py/g'
# remove -Werror (bug 887981)
sed -i -e 's/\-Werror//g' ../../lib/bpf/Makefile || die
}
bpftool_make() {
local arch=$(tc-arch-kernel)
tc-export AR CC LD
emake V=1 VF=1 \
HOSTCC="$(tc-getBUILD_CC)" HOSTLD="$(tc-getBUILD_LD)" \
EXTRA_CFLAGS="${CFLAGS}" ARCH="${arch}" BPFTOOL_VERSION="${MY_PV}" \
prefix="${EPREFIX}"/usr \
bash_compdir="$(get_bashcompdir)" \
feature-libcap="$(usex caps 1 0)" \
feature-llvm="$(usex llvm 1 0)" \
"$@"
}
src_compile() {
bpftool_make
bpftool_make -C Documentation
}
src_install() {
bpftool_make DESTDIR="${D}" install
bpftool_make mandir="${ED}"/usr/share/man -C Documentation install
}
pkg_postinst() {
optfeature "clang-bpf-co-re support" sys-devel/clang[llvm_targets_BPF]
}
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