137 lines
3.8 KiB
Bash
137 lines
3.8 KiB
Bash
# Copyright 2021-2024 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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LLVM_COMPAT=( 20 )
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LLVM_OPTIONAL=1
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PYTHON_COMPAT=( python3_{10..13} )
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inherit bash-completion-r1 linux-info llvm-r1 python-any-r1 toolchain-funcs
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DESCRIPTION="Tool for inspection and simple manipulation of eBPF programs and maps"
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HOMEPAGE="https://github.com/libbpf/bpftool"
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if [[ ${PV} == *9999* ]] ; then
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inherit git-r3
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EGIT_REPO_URI="https://github.com/libbpf/bpftool.git"
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EGIT_SUBMODULES=(libbpf)
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else
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# bpftool typically vendors whatever libbpf is current at the time
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# of a release, while libbpf publishes minor updates more frequently.
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# Uncomment the following to bundle an updated libbpf e.g. in case of
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# security or crasher bugs in libbpf and to keep the two synchronized.
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# This allows us to quickly update the vendored lib with a revbump.
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# Currently bpftool-x.y vendors libbpf-1.y; DO NOT mix different y versions.
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# See the libbpf repo (https://github.com/libbpf/libbpf) for possible updates.
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# LIBBPF_VERSION=1.5.0
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if [[ ! -z ${LIBBPF_VERSION} ]] ; then
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SRC_URI="https://github.com/libbpf/bpftool/archive/refs/tags/v${PV}.tar.gz -> bpftool-${PV}.tar.gz
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https://github.com/libbpf/libbpf/archive/refs/tags/v${LIBBPF_VERSION}.tar.gz
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-> libbpf-${LIBBPF_VERSION}.tar.gz"
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else
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# use tarball with bundled libbpf
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SRC_URI="https://github.com/libbpf/bpftool/releases/download/v${PV}/bpftool-libbpf-v${PV}-sources.tar.gz"
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S="${WORKDIR}/bpftool-libbpf-v${PV}-sources"
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fi
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KEYWORDS="~amd64 ~arm ~arm64 ~loong ~ppc ~ppc64 ~riscv ~x86"
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fi
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LICENSE="|| ( GPL-2 BSD-2 )"
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SLOT="0"
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IUSE="caps +clang llvm"
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REQUIRED_USE="llvm? ( ${LLVM_REQUIRED_USE} )"
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RDEPEND="
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caps? ( sys-libs/libcap:= )
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llvm? ( $(llvm_gen_dep 'llvm-core/llvm:${LLVM_SLOT}') )
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!llvm? ( sys-libs/binutils-libs:= )
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sys-libs/zlib:=
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virtual/libelf:=
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"
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DEPEND="
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${RDEPEND}
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>=sys-kernel/linux-headers-5.8
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"
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BDEPEND="
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${PYTHON_DEPS}
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app-arch/tar
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dev-python/docutils
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clang? ( $(llvm_gen_dep 'llvm-core/clang:${LLVM_SLOT}[llvm_targets_BPF]') )
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!clang? ( sys-devel/bpf-toolchain )
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"
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CONFIG_CHECK="~DEBUG_INFO_BTF"
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pkg_setup() {
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python-any-r1_pkg_setup
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use llvm && llvm-r1_pkg_setup
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}
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src_prepare() {
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default
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# prepare libbpf if necessary
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if [[ ! -z ${LIBBPF_VERSION} ]] ; then
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rm -rf libbpf || die
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ln -s "${WORKDIR}/libbpf-${LIBBPF_VERSION}" libbpf || die
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fi
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# remove -Werror from libbpf (bug 887981)
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sed -i -e 's/\-Werror//g' libbpf/src/Makefile || die
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# remove -Werror from bpftool feature detection
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sed -i -e 's/-Werror//g' src/Makefile.feature || die
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# remove hardcoded/unhelpful flags from bpftool
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sed -i -e '/CFLAGS += -O2/d' -e 's/-W //g' -e 's/-Wextra //g' src/Makefile || die
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if ! use clang; then
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# remove bpf target & add assembly annotations to fix CO-RE feature detection
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sed -i -e 's/-target bpf/-dA/' src/Makefile.feature || die
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# remove bpf target from skeleton build
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sed -i -e 's/--target=bpf//g' src/Makefile || die
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fi
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# Use rst2man or rst2man.py depending on which one exists (#930076)
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type -P rst2man >/dev/null || sed -i -e 's/rst2man/rst2man.py/g' docs/Makefile || die
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}
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bpftool_make() {
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# which BPF compiler should we use?
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if use clang; then
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export CLANG="$(get_llvm_prefix -b)/bin/clang"
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export LLVM_STRIP="$(get_llvm_prefix -b)/bin/llvm-strip"
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else
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# use bpf-toolchain
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export CLANG="bpf-unknown-none-gcc"
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export LLVM_STRIP="bpf-unknown-none-strip"
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fi
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tc-export AR CC LD
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emake \
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ARCH="$(tc-arch-kernel)" \
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HOSTAR="$(tc-getBUILD_AR)" \
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HOSTCC="$(tc-getBUILD_CC)" \
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HOSTLD="$(tc-getBUILD_LD)" \
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bash_compdir="$(get_bashcompdir)" \
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feature-libcap="$(usex caps 1 0)" \
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feature-llvm="$(usex llvm 1 0)" \
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prefix="${EPREFIX}"/usr \
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V=1 \
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"$@"
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}
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src_compile() {
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bpftool_make -C src
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bpftool_make -C docs
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}
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src_install() {
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bpftool_make DESTDIR="${D}" -C src install
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bpftool_make mandir="${ED}"/usr/share/man -C docs install
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}
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