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- # Copyright 1999-2025 Gentoo Authors
- # Distributed under the terms of the GNU General Public License v2
- EAPI=8
- LLVM_COMPAT=( 17 )
- PYTHON_COMPAT=( python3_{10..12} )
- RUST_MAX_VER=${PV}
- RUST_MIN_VER="$(ver_cut 1).$(($(ver_cut 2) - 1)).0"
- RUST_OPTIONAL=1
- MRUSTC_VERSION="0.11.2"
- MRUSTC_RUST_VERSION="1.74.0"
- inherit check-reqs cmake edo estack flag-o-matic llvm-r1 multiprocessing multilib multilib-build \
- optfeature python-any-r1 rust rust-toolchain toolchain-funcs verify-sig
- if [[ ${PV} = *beta* ]]; then
- betaver=${PV//*beta}
- BETA_SNAPSHOT="${betaver:0:4}-${betaver:4:2}-${betaver:6:2}"
- MY_P="rustc-beta"
- SRC="${BETA_SNAPSHOT}/rustc-beta-src.tar.xz -> rustc-${PV}-src.tar.xz"
- else
- MY_P="rustc-${PV}"
- SRC="${MY_P}-src.tar.xz"
- KEYWORDS="amd64 arm arm64 ~loong ppc ppc64 ~riscv sparc x86"
- fi
- DESCRIPTION="Language empowering everyone to build reliable and efficient software"
- HOMEPAGE="https://www.rust-lang.org/"
- SRC_URI="
- https://static.rust-lang.org/dist/${SRC}
- verify-sig? ( https://static.rust-lang.org/dist/${SRC}.asc )
- "
- S="${WORKDIR}/${MY_P}-src"
- # keep in sync with llvm ebuild of the same version as bundled one.
- ALL_LLVM_TARGETS=( AArch64 AMDGPU ARC ARM AVR BPF CSKY DirectX Hexagon Lanai
- LoongArch M68k Mips MSP430 NVPTX PowerPC RISCV Sparc SPIRV SystemZ VE
- WebAssembly X86 XCore Xtensa )
- ALL_LLVM_TARGETS=( "${ALL_LLVM_TARGETS[@]/#/llvm_targets_}" )
- LLVM_TARGET_USEDEPS=${ALL_LLVM_TARGETS[@]/%/(-)?}
- ALL_LLVM_EXPERIMENTAL_TARGETS=( ARC CSKY DirectX M68k SPIRV Xtensa )
- LICENSE="|| ( MIT Apache-2.0 ) BSD BSD-1 BSD-2 BSD-4"
- SLOT="${PV}"
- IUSE="big-endian clippy cpu_flags_x86_sse2 debug dist doc llvm-libunwind lto miri mrustc-bootstrap nightly parallel-compiler rustfmt rust-analyzer rust-src system-llvm test wasm ${ALL_LLVM_TARGETS[*]}"
- LLVM_DEPEND=()
- # splitting usedeps needed to avoid CI/pkgcheck's UncheckableDep limitation
- for _x in "${ALL_LLVM_TARGETS[@]}"; do
- LLVM_DEPEND+=( " ${_x}? ( $(llvm_gen_dep "llvm-core/llvm:\${LLVM_SLOT}[${_x}]") )" )
- done
- LLVM_DEPEND+=( " wasm? ( $(llvm_gen_dep 'llvm-core/lld:${LLVM_SLOT}') )" )
- LLVM_DEPEND+=( " $(llvm_gen_dep 'llvm-core/llvm:${LLVM_SLOT}')" )
- BDEPEND="${PYTHON_DEPS}
- app-eselect/eselect-rust
- || (
- >=sys-devel/gcc-4.7
- >=llvm-core/clang-3.5
- )
- !system-llvm? (
- >=dev-build/cmake-3.13.4
- app-alternatives/ninja
- )
- test? ( dev-debug/gdb )
- verify-sig? ( sec-keys/openpgp-keys-rust )
- mrustc-bootstrap? (
- ~dev-lang/mrustc-${MRUSTC_VERSION}
- dev-build/cmake
- sys-devel/gcc:*
- )
- !mrustc-bootstrap? ( ${RUST_DEPEND} )
- "
- DEPEND="
- >=app-arch/xz-utils-5.2
- net-misc/curl:=[http2,ssl]
- sys-libs/zlib:=
- dev-libs/openssl:0=
- system-llvm? (
- ${LLVM_DEPEND[*]}
- llvm-libunwind? ( llvm-runtimes/libunwind:= )
- )
- !system-llvm? (
- !llvm-libunwind? (
- elibc_musl? ( sys-libs/libunwind:= )
- )
- )
- "
- RDEPEND="${DEPEND}
- app-eselect/eselect-rust
- dev-lang/rust-common
- sys-apps/lsb-release
- !dev-lang/rust:stable
- !dev-lang/rust-bin:stable
- "
- REQUIRED_USE="|| ( ${ALL_LLVM_TARGETS[*]} )
- miri? ( nightly )
- parallel-compiler? ( nightly )
- rust-analyzer? ( rust-src )
- test? ( ${ALL_LLVM_TARGETS[*]} )
- wasm? ( llvm_targets_WebAssembly )
- x86? ( cpu_flags_x86_sse2 )
- "
- # we don't use cmake.eclass, but can get a warning
- CMAKE_WARN_UNUSED_CLI=no
- QA_FLAGS_IGNORED="
- usr/lib/${PN}/${PV}/bin/.*
- usr/lib/${PN}/${PV}/libexec/.*
- usr/lib/${PN}/${PV}/lib/lib.*.so
- usr/lib/${PN}/${PV}/lib/rustlib/.*/bin/.*
- usr/lib/${PN}/${PV}/lib/rustlib/.*/lib/lib.*.so
- "
- QA_SONAME="
- usr/lib/${PN}/${PV}/lib/lib.*.so.*
- usr/lib/${PN}/${PV}/lib/rustlib/.*/lib/lib.*.so
- "
- QA_PRESTRIPPED="
- usr/lib/${PN}/${PV}/lib/rustlib/.*/bin/rust-llvm-dwp
- usr/lib/${PN}/${PV}/lib/rustlib/.*/lib/self-contained/crtn.o
- "
- # An rmeta file is custom binary format that contains the metadata for the crate.
- # rmeta files do not support linking, since they do not contain compiled object files.
- # so we can safely silence the warning for this QA check.
- QA_EXECSTACK="usr/lib/${PN}/${PV}/lib/rustlib/*/lib*.rlib:lib.rmeta"
- # causes double bootstrap
- RESTRICT="test"
- VERIFY_SIG_OPENPGP_KEY_PATH=/usr/share/openpgp-keys/rust.asc
- PATCHES=(
- "${FILESDIR}"/1.74.1-cross-compile-libz.patch
- #"${FILESDIR}"/1.72.0-bump-libc-deps-to-0.2.146.patch # pending refresh
- "${FILESDIR}"/1.70.0-ignore-broken-and-non-applicable-tests.patch
- "${FILESDIR}"/1.62.1-musl-dynamic-linking.patch
- "${FILESDIR}"/1.67.0-doc-wasm.patch
- )
- clear_vendor_checksums() {
- sed -i 's/\("files":{\)[^}]*/\1/' "vendor/${1}/.cargo-checksum.json" || die
- }
- toml_usex() {
- usex "${1}" true false
- }
- pre_build_checks() {
- local M=9216
- # multiply requirements by 1.3 if we are doing x86-multilib
- if use amd64; then
- M=$(( $(usex abi_x86_32 13 10) * ${M} / 10 ))
- fi
- M=$(( $(usex clippy 128 0) + ${M} ))
- M=$(( $(usex miri 128 0) + ${M} ))
- M=$(( $(usex rustfmt 256 0) + ${M} ))
- # add 2G if we compile llvm and 256M per llvm_target
- if ! use system-llvm; then
- M=$(( 2048 + ${M} ))
- local ltarget
- for ltarget in ${ALL_LLVM_TARGETS[@]}; do
- M=$(( $(usex ${ltarget} 256 0) + ${M} ))
- done
- fi
- M=$(( $(usex wasm 256 0) + ${M} ))
- M=$(( $(usex debug 2 1) * ${M} ))
- eshopts_push -s extglob
- if is-flagq '-g?(gdb)?([1-9])'; then
- M=$(( 15 * ${M} / 10 ))
- fi
- eshopts_pop
- M=$(( $(usex doc 256 0) + ${M} ))
- if use mrustc-bootstrap; then
- M=$(( 2 * ${M} ))
- fi
- CHECKREQS_DISK_BUILD=${M}M check-reqs_pkg_${EBUILD_PHASE}
- }
- llvm_check_deps() {
- has_version -r "llvm-core/llvm:${LLVM_SLOT}[${LLVM_TARGET_USEDEPS// /,}]"
- }
- # Is LLVM being linked against libc++?
- is_libcxx_linked() {
- local code='#include <ciso646>
- #if defined(_LIBCPP_VERSION)
- HAVE_LIBCXX
- #endif
- '
- local out=$($(tc-getCXX) ${CXXFLAGS} ${CPPFLAGS} -x c++ -E -P - <<<"${code}") || return 1
- [[ ${out} == *HAVE_LIBCXX* ]]
- }
- pkg_pretend() {
- pre_build_checks
- }
- pkg_setup() {
- if [[ ${MERGE_TYPE} != binary ]]; then
- pre_build_checks
- python-any-r1_pkg_setup
- export LIBGIT2_NO_PKG_CONFIG=1 #749381
- if tc-is-cross-compiler; then
- use system-llvm && die "USE=system-llvm not allowed when cross-compiling"
- local cross_llvm_target="$(llvm_tuple_to_target "${CBUILD}")"
- use "llvm_targets_${cross_llvm_target}" || \
- die "Must enable LLVM_TARGETS=${cross_llvm_target} matching CBUILD=${CBUILD} when cross-compiling"
- fi
- if use mrustc-bootstrap; then
- echo "yay no gcc dep"
- #if ! tc-is-gcc; then
- # die "USE=mrustc-bootstrap reqires that the build environment use GCC"
- #fi
- else
- rust_pkg_setup
- fi
- if use system-llvm; then
- llvm-r1_pkg_setup
- local llvm_config="$(get_llvm_prefix)/bin/llvm-config"
- export LLVM_LINK_SHARED=1
- export RUSTFLAGS="${RUSTFLAGS} -Lnative=$("${llvm_config}" --libdir)"
- fi
- fi
- }
- src_prepare() {
- default
- # We'll need to revert this after the bootstrap.
- if use mrustc-bootstrap; then
- pushd "${S}" 2>/dev/null || die
- patch -p0 < "${BROOT}"/usr/share/mrustc-${MRUSTC_VERSION}/patches/rustc-${MRUSTC_RUST_VERSION}-src.patch ||
- die "Failed to patch sources to enable bootstrap with mrustc"
- popd 2>/dev/null || die
- fi
- }
- src_configure() {
- if tc-is-cross-compiler; then
- export PKG_CONFIG_ALLOW_CROSS=1
- export PKG_CONFIG_PATH="${ESYSROOT}/usr/$(get_libdir)/pkgconfig"
- export OPENSSL_INCLUDE_DIR="${ESYSROOT}/usr/include"
- export OPENSSL_LIB_DIR="${ESYSROOT}/usr/$(get_libdir)"
- fi
- filter-lto # https://bugs.gentoo.org/862109 https://bugs.gentoo.org/866231
- local rust_target="" rust_targets="" arch_cflags
- # Collect rust target names to compile standard libs for all ABIs.
- for v in $(multilib_get_enabled_abi_pairs); do
- rust_targets+=",\"$(rust_abi $(get_abi_CHOST ${v##*.}))\""
- done
- if use wasm; then
- rust_targets+=",\"wasm32-unknown-unknown\""
- if use system-llvm; then
- # un-hardcode rust-lld linker for this target
- # https://bugs.gentoo.org/715348
- sed -i '/linker:/ s/rust-lld/wasm-ld/' compiler/rustc_target/src/spec/wasm_base.rs || die
- fi
- fi
- rust_targets="${rust_targets#,}"
- # cargo and rustdoc are mandatory and should always be included
- local tools='"cargo","rustdoc", "rust-demangler"'
- use clippy && tools+=',"clippy"'
- use miri && tools+=',"miri"'
- use rustfmt && tools+=',"rustfmt"'
- use rust-analyzer && tools+=',"rust-analyzer"'
- use rust-src && tools+=',"src"'
- if use mrustc-bootstrap; then
- local rust_stage0_root="${WORKDIR}/bootstrap/rust-${PV}"
- else
- local rust_stage0_root="$(${RUSTC} --print sysroot || die "Can't determine rust's sysroot")"
- # in case of prefix it will be already prefixed, as --print sysroot returns full path
- [[ -d ${rust_stage0_root} ]] || die "${rust_stage0_root} is not a directory"
- fi
- rust_target="$(rust_abi)"
- rust_build="$(rust_abi "${CBUILD}")"
- rust_host="$(rust_abi "${CHOST}")"
- LLVM_EXPERIMENTAL_TARGETS=()
- for _x in "${ALL_LLVM_EXPERIMENTAL_TARGETS[@]}"; do
- if use llvm_targets_${_x} ; then
- LLVM_EXPERIMENTAL_TARGETS+=( ${_x} )
- fi
- done
- LLVM_EXPERIMENTAL_TARGETS=${LLVM_EXPERIMENTAL_TARGETS[@]}
- local cm_btype="$(usex debug DEBUG RELEASE)"
- cat <<- _EOF_ > "${S}"/config.toml
- changelog-seen = 2
- [llvm]
- download-ci-llvm = false
- optimize = $(toml_usex !debug)
- release-debuginfo = $(toml_usex debug)
- assertions = $(toml_usex debug)
- ninja = true
- targets = "${LLVM_TARGETS// /;}"
- experimental-targets = "${LLVM_EXPERIMENTAL_TARGETS// /;}"
- link-shared = $(toml_usex system-llvm)
- $(if is_libcxx_linked; then
- # https://bugs.gentoo.org/732632
- echo "use-libcxx = true"
- echo "static-libstdcpp = false"
- fi)
- $(case "${rust_target}" in
- i586-*-linux-*)
- # https://github.com/rust-lang/rust/issues/93059
- echo 'cflags = "-fcf-protection=none"'
- echo 'cxxflags = "-fcf-protection=none"'
- echo 'ldflags = "-fcf-protection=none"'
- ;;
- *)
- ;;
- esac)
- enable-warnings = false
- [llvm.build-config]
- CMAKE_VERBOSE_MAKEFILE = "ON"
- $(if ! tc-is-cross-compiler; then
- # When cross-compiling, LLVM is compiled twice, once for host and
- # once for target. Unfortunately, this build configuration applies
- # to both, which means any flags applicable to one target but not
- # the other will break. Conditionally disable respecting user
- # flags when cross-compiling.
- echo "CMAKE_C_FLAGS_${cm_btype} = \"${CFLAGS}\""
- echo "CMAKE_CXX_FLAGS_${cm_btype} = \"${CXXFLAGS}\""
- echo "CMAKE_EXE_LINKER_FLAGS_${cm_btype} = \"${LDFLAGS}\""
- echo "CMAKE_MODULE_LINKER_FLAGS_${cm_btype} = \"${LDFLAGS}\""
- echo "CMAKE_SHARED_LINKER_FLAGS_${cm_btype} = \"${LDFLAGS}\""
- echo "CMAKE_STATIC_LINKER_FLAGS_${cm_btype} = \"${ARFLAGS}\""
- fi)
- [build]
- build-stage = 2
- test-stage = 2
- build = "${rust_build}"
- host = ["${rust_host}"]
- target = [${rust_targets}]
- cargo = "${rust_stage0_root}/bin/cargo"
- rustc = "${rust_stage0_root}/bin/rustc"
- rustfmt = "${rust_stage0_root}/bin/rustfmt"
- docs = $(toml_usex doc)
- compiler-docs = false
- submodules = false
- python = "${EPYTHON}"
- locked-deps = true
- vendor = true
- extended = true
- tools = [${tools}]
- verbose = 2
- sanitizers = false
- profiler = true
- cargo-native-static = false
- [install]
- prefix = "${EPREFIX}/usr/lib/${PN}/${PV}"
- sysconfdir = "etc"
- docdir = "share/doc/rust"
- bindir = "bin"
- libdir = "lib"
- mandir = "share/man"
- [rust]
- # https://github.com/rust-lang/rust/issues/54872
- codegen-units-std = 1
- optimize = true
- debug = $(toml_usex debug)
- debug-assertions = $(toml_usex debug)
- debug-assertions-std = $(toml_usex debug)
- debuginfo-level = $(usex debug 2 0)
- debuginfo-level-rustc = $(usex debug 2 0)
- debuginfo-level-std = $(usex debug 2 0)
- debuginfo-level-tools = $(usex debug 2 0)
- debuginfo-level-tests = 0
- backtrace = true
- incremental = false
- $(if ! tc-is-cross-compiler; then
- echo "default-linker = \"$(tc-getCC)\""
- fi)
- parallel-compiler = $(toml_usex parallel-compiler)
- channel = "$(usex nightly nightly stable)"
- description = "gentoo"
- rpath = true
- verbose-tests = true
- optimize-tests = $(toml_usex !debug)
- codegen-tests = true
- dist-src = false
- remap-debuginfo = true
- lld = $(usex system-llvm false $(toml_usex wasm))
- # only deny warnings if doc+wasm are NOT requested, documenting stage0 wasm std fails without it
- # https://github.com/rust-lang/rust/issues/74976
- # https://github.com/rust-lang/rust/issues/76526
- deny-warnings = $(usex wasm $(usex doc false true) true)
- backtrace-on-ice = true
- jemalloc = false
- lto = "$(usex lto fat off)"
- [dist]
- src-tarball = false
- compression-formats = ["xz"]
- compression-profile = "balanced"
- _EOF_
- for v in $(multilib_get_enabled_abi_pairs); do
- rust_target=$(rust_abi $(get_abi_CHOST ${v##*.}))
- arch_cflags="$(get_abi_CFLAGS ${v##*.})"
- export CFLAGS_${rust_target//-/_}="${arch_cflags}"
- cat <<- _EOF_ >> "${S}"/config.toml
- [target.${rust_target}]
- ar = "$(tc-getAR)"
- cc = "$(tc-getCC)"
- cxx = "$(tc-getCXX)"
- linker = "$(tc-getCC)"
- ranlib = "$(tc-getRANLIB)"
- llvm-libunwind = "$(usex llvm-libunwind $(usex system-llvm system in-tree) no)"
- _EOF_
- if use system-llvm; then
- cat <<- _EOF_ >> "${S}"/config.toml
- llvm-config = "$(get_llvm_prefix)/bin/llvm-config"
- _EOF_
- fi
- # by default librustc_target/spec/linux_musl_base.rs sets base.crt_static_default = true;
- # but we patch it and set to false here as well
- if use elibc_musl; then
- cat <<- _EOF_ >> "${S}"/config.toml
- crt-static = false
- _EOF_
- fi
- done
- if use wasm; then
- cat <<- _EOF_ >> "${S}"/config.toml
- [target.wasm32-unknown-unknown]
- linker = "$(usex system-llvm lld rust-lld)"
- # wasm target does not have profiler_builtins https://bugs.gentoo.org/848483
- profiler = false
- _EOF_
- fi
- if [[ -n ${I_KNOW_WHAT_I_AM_DOING_CROSS} ]]; then # whitespace intentionally shifted below
- # experimental cross support
- # discussion: https://bugs.gentoo.org/679878
- # TODO: c*flags, clang, system-llvm, cargo.eclass target support
- # it would be much better if we could split out stdlib
- # complilation to separate ebuild and abuse CATEGORY to
- # just install to /usr/lib/rustlib/<target>
- # extra targets defined as a bash array
- # spec format: <LLVM target>:<rust-target>:<CTARGET>
- # best place would be /etc/portage/env/dev-lang/rust
- # Example:
- # RUST_CROSS_TARGETS=(
- # "AArch64:aarch64-unknown-linux-gnu:aarch64-unknown-linux-gnu"
- # )
- # no extra hand holding is done, no target transformations, all
- # values are passed as-is with just basic checks, so it's up to user to supply correct values
- # valid rust targets can be obtained with
- # rustc --print target-list
- # matching cross toolchain has to be installed
- # matching LLVM_TARGET has to be enabled for both rust and llvm (if using system one)
- # only gcc toolchains installed with crossdev are checked for now.
- # BUG: we can't pass host flags to cross compiler, so just filter for now
- # BUG: this should be more fine-grained.
- filter-flags '-mcpu=*' '-march=*' '-mtune=*'
- local cross_target_spec
- for cross_target_spec in "${RUST_CROSS_TARGETS[@]}";do
- # extracts first element form <LLVM target>:<rust-target>:<CTARGET>
- local cross_llvm_target="${cross_target_spec%%:*}"
- # extracts toolchain triples, <rust-target>:<CTARGET>
- local cross_triples="${cross_target_spec#*:}"
- # extracts first element after before : separator
- local cross_rust_target="${cross_triples%%:*}"
- # extracts last element after : separator
- local cross_toolchain="${cross_triples##*:}"
- use llvm_targets_${cross_llvm_target} || die "need llvm_targets_${cross_llvm_target} target enabled"
- command -v ${cross_toolchain}-gcc > /dev/null 2>&1 || die "need ${cross_toolchain} cross toolchain"
- cat <<- _EOF_ >> "${S}"/config.toml
- [target.${cross_rust_target}]
- ar = "${cross_toolchain}-ar"
- cc = "${cross_toolchain}-gcc"
- cxx = "${cross_toolchain}-g++"
- linker = "${cross_toolchain}-gcc"
- ranlib = "${cross_toolchain}-ranlib"
- _EOF_
- if use system-llvm; then
- cat <<- _EOF_ >> "${S}"/config.toml
- llvm-config = "$(get_llvm_prefix)/bin/llvm-config"
- _EOF_
- fi
- if [[ "${cross_toolchain}" == *-musl* ]]; then
- cat <<- _EOF_ >> "${S}"/config.toml
- musl-root = "$(${cross_toolchain}-gcc -print-sysroot)/usr"
- _EOF_
- fi
- # append cross target to "normal" target list
- # example 'target = ["powerpc64le-unknown-linux-gnu"]'
- # becomes 'target = ["powerpc64le-unknown-linux-gnu","aarch64-unknown-linux-gnu"]'
- rust_targets="${rust_targets},\"${cross_rust_target}\""
- sed -i "/^target = \[/ s#\[.*\]#\[${rust_targets}\]#" config.toml || die
- ewarn
- ewarn "Enabled ${cross_rust_target} rust target"
- ewarn "Using ${cross_toolchain} cross toolchain"
- ewarn
- if ! has_version -b 'sys-devel/binutils[multitarget]' ; then
- ewarn "'sys-devel/binutils[multitarget]' is not installed"
- ewarn "'strip' will be unable to strip cross libraries"
- ewarn "cross targets will be installed with full debug information"
- ewarn "enable 'multitarget' USE flag for binutils to be able to strip object files"
- ewarn
- ewarn "Alternatively llvm-strip can be used, it supports stripping any target"
- ewarn "define STRIP=\"llvm-strip\" to use it (experimental)"
- ewarn
- fi
- done
- fi # I_KNOW_WHAT_I_AM_DOING_CROSS
- einfo "Rust configured with the following flags:"
- echo
- echo RUSTFLAGS="\"${RUSTFLAGS}\""
- echo RUSTFLAGS_BOOTSTRAP="\"${RUSTFLAGS_BOOTSTRAP}\""
- echo RUSTFLAGS_NOT_BOOTSTRAP="\"${RUSTFLAGS_NOT_BOOTSTRAP}\""
- echo MAGIC_EXTRA_RUSTFLAGS="\"${MAGIC_EXTRA_RUSTFLAGS}\""
- env | grep "CARGO_TARGET_.*_RUSTFLAGS="
- env | grep "CFLAGS_.*"
- echo
- einfo "config.toml contents:"
- cat "${S}"/config.toml || die
- echo
- }
- # Build a very minimal llvm that we can use for bootstrap rustc codegen
- llvm_bootstrap() {
- # Reference ${P}/src/bootstrap/native.rs for these values
- local llvm_cmake_opts=(
- "-G Ninja"
- "-DLLVM_TARGET_ARCH=${CFG_COMPILER_HOST_TRIPLE%%-*}"
- "-DLLVM_DEFAULT_TARGET_TRIPLE=${CFG_COMPILER_HOST_TRIPLE}"
- "-DLLVM_TARGETS_TO_BUILD=${BOOTSTRAP_LLVM_TARGETS:=X86;ARM;AArch64}" #;Mips;PowerPC;SystemZ;JSBackend;MSP430;Sparc;NVPTX
- "-DLLVM_ENABLE_ASSERTIONS=OFF"
- "-DLLVM_INCLUDE_EXAMPLES=OFF"
- "-DLLVM_INCLUDE_TESTS=OFF"
- "-DLLVM_INCLUDE_DOCS=OFF"
- "-DLLVM_INCLUDE_BENCHMARKS=OFF"
- "-DLLVM_ENABLE_ZLIB=OFF"
- "-DLLVM_ENABLE_TERMINFO=OFF"
- "-DLLVM_ENABLE_LIBEDIT=OFF"
- "-DCMAKE_CXX_COMPILER=$(tc-getCXX)"
- "-DCMAKE_C_COMPILER=$(tc-getCC)"
- "-DCMAKE_BUILD_TYPE=Release"
- )
- if [[ -z "${LLVM_CMAKE_OPTS_EXTRA}" ]]; then
- llvm_cmake_opts+=( "${LLVM_CMAKE_OPTS_EXTRA}")
- fi
- elog "Building bootstrap llvm ..."
- mkdir -p "${WORKDIR}/bootstrap/llvm" || die
- pushd "${WORKDIR}/bootstrap/llvm" 2>/dev/null || die
- edo cmake ${llvm_cmake_opts[*]} "${S}/src/llvm-project/llvm"
- eninja || die "Failed to build bootstrap llvm"
- popd 2>/dev/null || die
- }
- # High level steps:
- # Our system mrustc package has built stdlib for our current platform.
- # - Step 1: Use system-installed mrustc, (m)rust(c) stdlib, and minicargo to
- # bootstrap a `cargo` and `rustc` (mrustc-stage0)
- # - Step 2: Use minicargo and the built `rustc` to build a working `sysroot`
- # (includes `std`, `panic_unwind``, `test`, etc.) (mrustc-stage0)
- # - Step 3: Build build libs again (this time using `cargo` and `rustc`) (mrustc-stage1)
- # - Step 4: Build a `rustc` using those libs (mrustc-stage1)
- # - Done so there's an optimised rustc arollvm_cmake_optsund (mrustc is bad at codegen)
- # - Step 5: Build `libstd` with this `rustc` (mrustc-stage2)
- # - Needed to match ABIs
- # Stages:
- # - mrustc-stage0: mrustc-built cargo and rustc
- # - mrustc-stage1: rustc and sysroot built with mrustc-stage0
- # - mrustc-stage2: rustc from stage1 with sysroot built with stage0
- # See:
- # - https://github.com/thepowersgang/mrustc/blob/master/run_rustc/Makefile
- # - https://github.com/thepowersgang/mrustc/blob/master/TestRustcBootstrap.sh
- # - Upstream Windows .cmd files are also a good reference for early bootstrap
- mrustc_bootstrap() {
- export RUSTC_BOOTSTRAP=1 # Possibly the only intended use of this variable in ::gentoo
- # export these variables now and unset them at the end of the function so they don't leak
- # into the rest of the build.
- export CFG_COMPILER_HOST_TRIPLE="$(rust_abi)"
- export CFG_RELEASE="${MRUSTC_RUST_VERSION}" # Let's pretend we're 1.74.0
- export CFG_RELEASE_CHANNEL="stable"
- export CFG_VERSION="${MRUSTC_RUST_VERSION}-stable-mrustc"
- export CFG_PREFIX="mrustc"
- export CFG_LIBDIR_RELATIVE="lib"
- export RUSTC_INSTALL_BINDIR="bin"
- export REAL_LIBRARY_PATH_VAR="LD_LIBRARY_PATH"
- # These flags are used in every invocation of our bootstrap `cargo`.
- local cargo_flags="--target ${CFG_COMPILER_HOST_TRIPLE} -j $(makeopts_jobs) --release --verbose"
- if use system-llvm; then
- export LLVM_CONFIG="$(get_llvm_prefix)/bin/llvm-config"
- else
- llvm_bootstrap
- export LLVM_CONFIG="${WORKDIR}/bootstrap/llvm/bin/llvm-config"
- fi
- # define the mrustc sysroot and common minicargo arguments.
- local mrustc_sysroot="${BROOT}/usr/lib/rust/mrustc-${MRUSTC_VERSION}/lib/rustlib/${CFG_COMPILER_HOST_TRIPLE}/lib"
- local minicargo_common_args=(
- "-L" "${mrustc_sysroot}"
- "-j" "$(makeopts_jobs)"
- "--vendor-dir" "${S}/vendor"
- "--manifest-overrides"
- "${BROOT}/usr/share/mrustc-${MRUSTC_VERSION}/patches/rustc-${MRUSTC_RUST_VERSION}-overrides.toml"
- )
- # There's a very good chance that minicargo and mrustc are not in the PATH.
- if ! command -v minicargo &> /dev/null; then
- export PATH="${BROOT}/usr/lib/rust/mrustc-${MRUSTC_VERSION}/bin:${PATH}"
- fi
- # Sanity check our bootstrap compiler & stdlib.
- elog "Sanity checking mrustc and stdlib ..."
- edo mrustc "${S}/tests/ui/hello_world/main.rs" -L "${mrustc_sysroot}" -o "${T}"/hello -g
- "${T}"/hello || die "Failed to run hello_world"
- # Seems fine, let's build some tools!
- # Step 1: Build a `cargo` and `rustc` using system-installed mrustc
- # Anything we produce is going to be terribly unoptimised; mrustc does not do fantastic codegen.
- # It's good enough to bootstrap the "real" rustc though.
- elog "Building bootstrap cargo and rustc using mrustc and minicargo (mrustc-stage0) ..."
- local stage0="${WORKDIR}/bootstrap/mrustc-stage0"
- mkdir -p "${stage0}" || die
- edo minicargo "${S}"/src/tools/cargo --output-dir "${stage0}"/cargo-build ${minicargo_common_args[*]}
- "${stage0}"/cargo-build/cargo --version || die "Bootstrap cargo failed basic sanity check"
- edo minicargo "${S}"/compiler/rustc --output-dir "${stage0}"/rustc-build ${minicargo_common_args[*]} \
- --features llvm
- "${stage0}"/rustc-build/rustc_main --version || die "Bootstrap rustc failed basic sanity check"
- # minicargo has special-casing for `rustc` so we need to rename it.
- mv "${stage0}"/rustc-build/rustc_main "${stage0}"/rustc-build/rustc || die "Failed to rename rustc_main to rustc"
- # rustc wants these here
- mkdir -p "${stage0}"/codegen-backends || die
- mv "${stage0}"/rustc-build/librustc_codegen_llvm.* "${stage0}"/codegen-backends || die
- # Step 2: use the bootstrapped rustc to build sysroot; we need to use `minicargo` for this -
- # mrustc does not accept all of the arguments that rustc does, even with the rustc_proxy wrapper.
- # `--script-overrides`: If the overrides are available, build scripts (and build-deps) are not built
- # which is good since we don't have a working compiler yet, and can't build them.
- local stage0_sysroot_lib="${stage0}/lib/rustlib/${CFG_COMPILER_HOST_TRIPLE}/lib"
- # minicargo <= 0.11.2 doesn't create this directory and silently fails, besides it's better to be explicit, right?
- mkdir -p "${stage0_sysroot_lib}" || die "Failed to create stage0 directory"
- elog "Building 'sysroot' using bootstrap rustc (mrustc-stage0) ..."
- edo env MRUSTC_PATH="${stage0}/rustc-build/rustc" minicargo -j $(makeopts_jobs) --vendor-dir "${S}"/vendor \
- --script-overrides "${BROOT}/usr/share/mrustc-0.11.2/script-overrides/stable-${MRUSTC_RUST_VERSION}-linux/" \
- --output-dir "${stage0_sysroot_lib}" "${S}"/library/sysroot ||
- die "Failed to build sysroot with bootstrap rust (mrustc-stage0)"
- elog "Sanity checking sysroot and rustc ..."
- mkdir -p "${T}"/stage0-hello || die
- edo "${stage0}"/rustc-build/rustc -L "${stage0_sysroot_lib}" -g "${S}/tests/ui/hello_world/main.rs" \
- -o "${T}"/stage0-hello/hello
- "${T}"/stage0-hello/hello || die "Failed to run hello_world built with bootstrap rust stage0"
- elog "mrustc bootstrap stage0 complete!"
- # Step 3: Build a "proper" libstd, including dynamic libs using our bootstrap cargo and rustc.
- elog "Building 'sysroot' with the stage0 rustc (mrustc-stage1) ..."
- local stage1="${WORKDIR}/bootstrap/mrustc-stage1"
- local stage1_sysroot_lib="${stage1}/lib/rustlib/${CFG_COMPILER_HOST_TRIPLE}/lib"
- mkdir -p "${stage1_sysroot_lib}" || die "Failed to create stage1 directory"
- mkdir -p "${stage1}/bin" || die
- # Simplified to avoid calling rustc_proxy; We don't need stage1 rustc until after this is built...
- edo env RUSTFLAGS="-Z force-unstable-if-unmarked" CARGO_TARGET_DIR="${stage1}/sysroot-build" \
- RUSTC="${stage0}/rustc-build/rustc" "${stage0}"/cargo-build/cargo build ${cargo_flags} \
- --manifest-path "${S}/library/sysroot/Cargo.toml" --features panic-unwind
- # Move the built libs into the sysroot libdir.
- mv "${stage1}/sysroot-build/${CFG_COMPILER_HOST_TRIPLE}/release/deps"/*.{rlib,rmeta,so} \
- "${stage1_sysroot_lib}" || die "Failed to move stage1 libs to stage1 sysroot"
- # We need to copy the stage0 rustc to the stage1 sysroot; this "updates" the sysroot location and enables
- # resolution of stage1 libs. (run `rustc --print sysroot` on stage0 and stage1 rustc to verify)
- cp "${stage0}/rustc-build/rustc" "${stage1}/bin/rustc" || die "Failed to copy rustc to stage1 sysroot"
- # Step 4: Build `rustc` with itself, so we have a rustc with the right ABI.
- # This will be our final `rustc` for the bootstrap process.
- elog "Building rustc with stage1 libs (mrustc-stage1) ..."
- mkdir -p "${stage1}/rustc-build" || die
- edo env RUSTFLAGS="-Z force-unstable-if-unmarked -C link_args=-Wl,-rpath,\$ORIGIN/../lib" \
- LD_LIBRARY_PATH="${stage2_sysroot_lib}" CARGO_TARGET_DIR="${stage1}/rustc-build" \
- RUSTC="${stage1}/bin/rustc" TMPDIR="${T}" "${stage0}"/cargo-build/cargo build ${cargo_flags} \
- --manifest-path "${S}/compiler/rustc/Cargo.toml" --features llvm
- # Step 5: Build `sysroot` with this `rustc` - Needed to match ABI
- # We need to use the previous sysroot; we could reuse that dir but it's easier to just copy it.
- elog "Building final 'sysroot' with the final rustc (mrustc-stage2) ..."
- local stage2="${WORKDIR}/bootstrap/mrustc-stage2"
- local stage2_sysroot_lib="${stage2}/lib/rustlib/${CFG_COMPILER_HOST_TRIPLE}/lib"
- mkdir -p "${stage2_sysroot_lib}" || die "Failed to create stage2 directory"
- mkdir -p "${stage2}/bin" || die
- # Copy required files from stage1 to stage2 sysroot
- cp "${stage1}/rustc-build/${CFG_COMPILER_HOST_TRIPLE}"/release/rustc-main "${stage2}/bin/rustc_binary" ||
- die "Failed to copy final rustc to stage2 sysroot"
- cp "${stage1}/rustc-build/${CFG_COMPILER_HOST_TRIPLE}"/release/librustc_driver.so "${stage2}/lib" ||
- die "Failed to copy librustc_driver to sysroot"
- cp "${stage1}/rustc-build/${CFG_COMPILER_HOST_TRIPLE}"/release/deps/*.{rlib,so} "${stage2_sysroot_lib}" ||
- die "Failed to copy final rustc libs to stage2 sysroot"
- cp "${stage1_sysroot_lib}"/* "${stage2_sysroot_lib}" || die "Failed to copy stage1 so files to stage2 sysroot"
- # There's a magic script used in place of rustc so that libs can be found
- cat <<- EOF > "${stage2}/bin/rustc" || die "Failed to create rustc wrapper"
- #!/bin/sh
- LD_LIBRARY_PATH="${stage2}/lib:${stage2_sysroot_lib}" ${stage2}/bin/rustc_binary "\$@"
- EOF
- chmod +x "${stage2}/bin/rustc" || die "Failed to make rustc wrapper executable"
- # Use rustc to build 'sysroot'; this is the final step in the bootstrap process.
- # rpath probably isn't needed here, but it doesn't hurt.
- edo env RUSTFLAGS="-Z force-unstable-if-unmarked -C link_args=-Wl,-rpath,\$ORIGIN/../lib" \
- CARGO_TARGET_DIR="${stage2}/stdlib-build" RUSTC="${stage2}/bin/rustc" \
- "${stage0}"/cargo-build/cargo build ${cargo_flags} --manifest-path "${S}/library/sysroot/Cargo.toml" \
- --features panic-unwind
- # Build our final output sysroot
- local output="${WORKDIR}/bootstrap/rust-${PV}"
- local output_sysroot_lib="${output}/lib/rustlib/${CFG_COMPILER_HOST_TRIPLE}/lib"
- mkdir -p "${output_sysroot_lib}" || die "Failed to create output directory"
- mkdir -p "${output}/bin" || die "Failed to create output directory"
- # Copy our various output files into the output sysroot
- # rustc
- cp "${stage1}/rustc-build/${CFG_COMPILER_HOST_TRIPLE}"/release/rustc-main "${output}/bin/rustc_binary" ||
- die "Failed to copy final rustc to output"
- cp "${stage1}/rustc-build/${CFG_COMPILER_HOST_TRIPLE}"/release/librustc_driver.so "${output}/lib" ||
- die "Failed to copy librustc_driver to output"
- cp "${stage1}/rustc-build/${CFG_COMPILER_HOST_TRIPLE}"/release/deps/*.{rlib,so} "${output_sysroot_lib}" ||
- die "Failed to copy final rustc libs to output"
- # cargo; no need to build an optimised cargo if we're using this to build a complelety new Rust.
- cp "${stage0}/cargo-build/cargo" "${output}/bin/cargo" || die "Failed to copy cargo to output"
- # libs
- mv "${stage2}/stdlib-build/${CFG_COMPILER_HOST_TRIPLE}/release/deps"/*.{rlib,rmeta,so} "${output_sysroot_lib}" ||
- die "Failed to copy stage2 libs to output"
- # Our trusty rustc wrapper
- cat <<- EOF > "${output}/bin/rustc" || die "Failed to create rustc wrapper"
- #!/bin/sh
- LD_LIBRARY_PATH="${output}/lib:${output_sysroot_lib}" ${output}/bin/rustc_binary "\$@"
- EOF
- chmod +x "${output}/bin/rustc" || die "Failed to make rustc wrapper executable"
- # Perform a sanity check on the final Rust.
- mkdir -p "${T}"/output-hello || die
- edo "${output}/bin/rustc" -L "${output_sysroot_lib}" -g "${S}/tests/ui/hello_world/main.rs" \
- -o "${T}"/output-hello/hello
- "${T}"/output-hello/hello || die "Failed to run hello_world built with bootstrapped Rust"
- elog "Successfully bootstrapped Rust using mrustc!"
- # Note: The Rust sysroot that we've produced is pretty close to what we'd expect from a normal Rust build.
- # If someone was so inclined they could build an optimised cargo using the stage2 rustc and sysroot,
- # and install the output directly. This is untested, as I'm sure there's more to it than that.
- # I'm satisfied with being able to build Rust normally at this point.
- # Tidy up the Rust sources; revert mrustc changes so Rust can be built normally.
- pushd "${S}" 2>/dev/null || die
- patch -R -p0 < "${BROOT}"/usr/share/mrustc-${MRUSTC_VERSION}/patches/rustc-${MRUSTC_RUST_VERSION}-src.patch ||
- die "Failed to revert mrustc patches"
- popd 2>/dev/null || die
- # Tidy up any environment variables we've set in the bootstrap process.
- unset CFG_COMPILER_HOST_TRIPLE CFG_RELEASE CFG_RELEASE_CHANNEL CFG_PREFIX CFG_VERSION
- unset CFG_LIBDIR_RELATIVE LLVM_CONFIG REAL_LIBRARY_PATH_VAR RUSTFLAGS RUSTC_BOOTSTRAP RUSTC_INSTALL_BINDIR
- }
- src_compile() {
- use mrustc-bootstrap && mrustc_bootstrap
- RUST_BACKTRACE=1 "${EPYTHON}" ./x.py build -vvv --config="${S}"/config.toml -j$(makeopts_jobs) || die
- }
- src_test() {
- # https://rustc-dev-guide.rust-lang.org/tests/intro.html
- # those are basic and codegen tests.
- local tests=(
- codegen
- codegen-units
- compile-fail
- incremental
- mir-opt
- pretty
- run-make
- )
- # fails if llvm is not built with ALL targets.
- # and known to fail with system llvm sometimes.
- use system-llvm || tests+=( assembly )
- # fragile/expensive/less important tests
- # or tests that require extra builds
- # TODO: instead of skipping, just make some nonfatal.
- if [[ ${ERUST_RUN_EXTRA_TESTS:-no} != no ]]; then
- tests+=(
- rustdoc
- rustdoc-js
- rustdoc-js-std
- rustdoc-ui
- run-make-fulldeps
- ui
- ui-fulldeps
- )
- fi
- local i failed=()
- einfo "rust_src_test: enabled tests ${tests[@]/#/src/test/}"
- for i in "${tests[@]}"; do
- local t="src/test/${i}"
- einfo "rust_src_test: running ${t}"
- if ! RUST_BACKTRACE=1 "${EPYTHON}" ./x.py test -vv --config="${S}"/config.toml \
- -j$(makeopts_jobs) --no-doc --no-fail-fast "${t}"
- then
- failed+=( "${t}" )
- eerror "rust_src_test: ${t} failed"
- fi
- done
- if [[ ${#failed[@]} -ne 0 ]]; then
- eerror "rust_src_test: failure summary: ${failed[@]}"
- die "aborting due to test failures"
- fi
- }
- src_install() {
- DESTDIR="${D}" "${EPYTHON}" ./x.py install -vv --config="${S}"/config.toml -j$(makeopts_jobs) || die
- # bug #689562, #689160
- rm -v "${ED}/usr/lib/${PN}/${PV}/etc/bash_completion.d/cargo" || die
- rmdir -v "${ED}/usr/lib/${PN}/${PV}"/etc{/bash_completion.d,} || die
- local symlinks=(
- cargo
- rustc
- rustdoc
- rust-gdb
- rust-gdbgui
- rust-lldb
- rust-demangler
- )
- use clippy && symlinks+=( clippy-driver cargo-clippy )
- use miri && symlinks+=( miri cargo-miri )
- use rustfmt && symlinks+=( rustfmt cargo-fmt )
- use rust-analyzer && symlinks+=( rust-analyzer )
- einfo "installing eselect-rust symlinks and paths: ${symlinks[@]}"
- local i
- for i in "${symlinks[@]}"; do
- # we need realpath on /usr/bin/* symlink return version-appended binary path.
- # so /usr/bin/rustc should point to /usr/lib/rust/<ver>/bin/rustc-<ver>
- # need to fix eselect-rust to remove this hack.
- local ver_i="${i}-${PV}"
- if [[ -f "${ED}/usr/lib/${PN}/${PV}/bin/${i}" ]]; then
- einfo "Installing ${i} symlink"
- ln -v "${ED}/usr/lib/${PN}/${PV}/bin/${i}" "${ED}/usr/lib/${PN}/${PV}/bin/${ver_i}" || die
- else
- ewarn "${i} symlink requested, but source file not found"
- ewarn "please report this"
- fi
- dosym "../lib/${PN}/${PV}/bin/${ver_i}" "/usr/bin/${ver_i}"
- done
- # symlinks to switch components to active rust in eselect
- dosym "${PV}/lib" "/usr/lib/${PN}/lib-${PV}"
- use rust-analyzer && dosym "${PV}/libexec" "/usr/lib/${PN}/libexec-${PV}"
- dosym "${PV}/share/man" "/usr/lib/${PN}/man-${PV}"
- dosym "rust/${PV}/lib/rustlib" "/usr/lib/rustlib-${PV}"
- dosym "../../lib/${PN}/${PV}/share/doc/rust" "/usr/share/doc/${P}"
- newenvd - "50${P}" <<-_EOF_
- MANPATH="${EPREFIX}/usr/lib/rust/man-${PV}"
- _EOF_
- rm -rf "${ED}/usr/lib/${PN}/${PV}"/*.old || die
- rm -rf "${ED}/usr/lib/${PN}/${PV}/bin"/*.old || die
- rm -rf "${ED}/usr/lib/${PN}/${PV}/doc"/*.old || die
- # note: eselect-rust adds EROOT to all paths below
- cat <<-_EOF_ > "${T}/provider-${P}"
- /usr/bin/cargo
- /usr/bin/rustdoc
- /usr/bin/rust-demangler
- /usr/bin/rust-gdb
- /usr/bin/rust-gdbgui
- /usr/bin/rust-lldb
- /usr/lib/rustlib
- /usr/lib/rust/lib
- /usr/lib/rust/man
- /usr/share/doc/rust
- _EOF_
- if use clippy; then
- echo /usr/bin/clippy-driver >> "${T}/provider-${P}"
- echo /usr/bin/cargo-clippy >> "${T}/provider-${P}"
- fi
- if use miri; then
- echo /usr/bin/miri >> "${T}/provider-${P}"
- echo /usr/bin/cargo-miri >> "${T}/provider-${P}"
- fi
- if use rustfmt; then
- echo /usr/bin/rustfmt >> "${T}/provider-${P}"
- echo /usr/bin/cargo-fmt >> "${T}/provider-${P}"
- fi
- if use rust-analyzer; then
- echo /usr/lib/rust/libexec >> "${T}/provider-${P}"
- echo /usr/bin/rust-analyzer >> "${T}/provider-${P}"
- fi
- insinto /etc/env.d/rust
- doins "${T}/provider-${P}"
- if use dist; then
- insinto "/usr/lib/${PN}/${PV}/dist"
- doins -r "${S}/build/dist/."
- fi
- }
- pkg_preinst() {
- # 943308 and friends; basically --keep-going can forget to unmerge old rust
- # but the soft blocker allows us to install conflicting files.
- # This results in duplicated .{rlib,so} files which confuses rustc and results in
- # the need for manual intervention.
- if has_version -b "dev-lang/rust:stable/$(ver_cut 1-2)"; then
- # we need to find all .{rlib,so} files in the old rust lib directory
- # and store them in an array for later use
- readarray -d '' old_rust_libs < <(
- find "${EROOT}/usr/lib/rust/${PV}/lib/rustlib" \
- -type f \( -name '*.rlib' -o -name '*.so' \) -print0)
- export old_rust_libs
- if [[ ${#old_rust_libs[@]} -gt 0 ]]; then
- einfo "Found old .rlib and .so files in the old rust lib directory"
- else
- die "Found no old .rlib and .so files but old rust version is installed. Bailing!"
- fi
- fi
- }
- pkg_postinst() {
- local old_rust="dev-lang/rust:stable/$(ver_cut 1-2)"
- if has_version -b ${old_rust}; then
- # Be _extra_ careful here as we're removing files from the live filesystem
- local f
- local only_one_file=()
- einfo "Tidying up libraries files from non-slotted \`${old_rust}\`."
- for f in "${old_rust_libs[@]}"; do
- [[ -f ${f} ]] || die "old_rust_libs array contains non-existent file"
- local base_name="${f%-*}"
- local ext="${f##*.}"
- local matching_files=("${base_name}"-*.${ext})
- case ${#matching_files[@]} in
- 2)
- einfo "Removing old .${ext}: ${f}"
- rm "${f}" || die
- ;;
- 1)
- # Turns out fingerprints are not as unique as we'd thought, _sometimes_ they collide,
- # so we may have already installed over the old file.
- # We'll warn about this just in case, but it's probably fine.
- only_one_file+=( "${matching_files[0]}" )
- ;;
- *)
- die "Expected one or two files matching ${base_name}-\*.rlib, but found ${#matching_files[@]}"
- ;;
- esac
- done
- if [[ ${#only_one_file} -gt 0 ]]; then
- einfo "While tidying up non-slotted rust libraries for \`${old_rust}\`,"
- einfo "the following file(s) did not have a duplicate where one was expected:"
- for f in "${only_one_file[@]}"; do
- einfo " * ${f}"
- done
- einfo ""
- einfo "This is unlikely to cause problems; the fingerprint for the library ended up being the same."
- einfo "However, if you encounter any issues please report them to the Gentoo Rust Team."
- fi
- fi
- eselect rust update
- if has_version dev-debug/gdb || has_version llvm-core/lldb; then
- elog "Rust installs helper scripts for calling GDB and LLDB,"
- elog "for convenience they are installed under /usr/bin/rust-{gdb,lldb}-${PV}."
- fi
- optfeature "Emacs support" "app-emacs/rust-mode"
- optfeature "Vim support" "app-vim/rust-vim"
- }
- pkg_postrm() {
- eselect rust cleanup
- }
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