| # Copyright 2022 The Chromium OS Authors. All rights reserved. |
| # Distributed under the terms of the GNU General Public License v2 |
| |
| # @ECLASS: cros-rustc.eclass |
| # @MAINTAINER: |
| # The Chromium OS Toolchain Team <chromeos-toolchain@google.com> |
| # @BUGREPORTS: |
| # Please report bugs via |
| # https://issuetracker.google.com/issues/new?component=1038090&template=1576440 |
| # @VCSURL: https://chromium.googlesource.com/chromiumos/overlays/chromiumos-overlay/+/HEAD/eclass/@ECLASS@ |
| # @BLURB: Eclass for building CrOS' Rust toolchain. |
| # @DESCRIPTION: |
| # This eclass is used to build both dev-lang/rust-host and dev-lang/rust. |
| # |
| # dev-lang/rust-host is an ebuild that provides all artifacts necessary for |
| # building Rust for the host. dev-lang/rust supplements this with libraries for |
| # cross-compiling. We maintain this split because we need to build Rust |
| # binaries for the host prior to cross-* libraries being available. |
| # |
| # An important concept when building dev-lang/rust-host and dev-lang/rust is |
| # continuity: these packages are expected to be built from _identical_ Rust |
| # sources. This assumption: |
| # - doesn't restrict us in any meaningful way, |
| # - keeps us more consistent with upstream flows for building `rustc`, and |
| # - allows us to significantly cut down on the build time of dev-lang/rust, |
| # since dev-lang/rust can skip unpacking sources, configuring them, and |
| # rebuilding LLVM + stage0 + stage1. |
| # |
| # Moreover, if you want to make meaningful changes to Rust, you'll need to |
| # always reemerge _both_ dev-lang/rust-host and dev-lang/rust. dev-lang/rust |
| # assumes that the sources unpacked by dev-lang/rust-host, if present, are |
| # identical to the ones it will build. dev-lang/rust-host always starts with a |
| # clean slate. |
| |
| if [[ -z ${_ECLASS_CROS_RUSTC} ]]; then |
| _ECLASS_CROS_RUSTC="1" |
| |
| # Check for EAPI 7+. |
| case "${EAPI:-0}" in |
| [0123456]) die "unsupported EAPI (${EAPI}) in eclass (${ECLASS})" ;; |
| esac |
| |
| EXPORT_FUNCTIONS pkg_setup src_unpack src_prepare src_configure src_compile |
| |
| PYTHON_COMPAT=( python3_{6..9} ) |
| inherit python-any-r1 toolchain-funcs |
| |
| # @ECLASS-VARIABLE: RUSTC_TARGET_TRIPLES |
| # @DEFAULT_UNSET |
| # @REQUIRED |
| # @DESCRIPTION: |
| # This is the list of target triples for rustc as they appear in the cros_sdk. |
| # cros-rust_src_configure instructs cros-rust_src_compile to use |
| # "${triple}-clang" when building each one of these. |
| |
| # @ECLASS-VARIABLE: RUSTC_BARE_TARGET_TRIPLES |
| # @DEFAULT_UNSET |
| # @DESCRIPTION: |
| # These are the triples we use GCC with. `*-cros-*` triples should not be |
| # included here. |
| |
| # There's a fair amount of direct commonality between dev-lang/rust and |
| # dev-lang/rust-host. Capture that here. |
| ABI_VER="$(ver_cut 1-2)" |
| SLOT="stable/${ABI_VER}" |
| MY_P="rustc-${PV}" |
| SRC="${MY_P}-src.tar.gz" |
| |
| # The version of rust-bootstrap that we're using to build our current Rust |
| # toolchain. This is generally the version released prior to the current one, |
| # since Rust uses the beta compiler to build the nightly compiler. |
| BOOTSTRAP_VERSION="1.57.0" |
| |
| HOMEPAGE="https://www.rust-lang.org/" |
| |
| SRC_URI="https://static.rust-lang.org/dist/${SRC} -> rustc-${PV}-src.tar.gz" |
| |
| LICENSE="|| ( MIT Apache-2.0 ) BSD-1 BSD-2 BSD-4 UoI-NCSA" |
| |
| RESTRICT="binchecks strip" |
| |
| DEPEND="${PYTHON_DEPS} |
| >=dev-libs/libxml2-2.9.6 |
| >=dev-lang/perl-5.0 |
| " |
| |
| BDEPEND="dev-lang/rust-bootstrap:${BOOTSTRAP_VERSION}" |
| |
| PATCHES=( |
| "${FILESDIR}/rust-${PV}-add-cros-targets.patch" |
| "${FILESDIR}/rust-${PV}-fix-rpath.patch" |
| "${FILESDIR}/rust-${PV}-Revert-CMake-Unconditionally-add-.h-and-.td-files-to.patch" |
| "${FILESDIR}/rust-${PV}-no-test-on-build.patch" |
| "${FILESDIR}/rust-${PV}-sanitizer-supported.patch" |
| "${FILESDIR}/rust-${PV}-cc.patch" |
| "${FILESDIR}/rust-${PV}-revert-libunwind-build.patch" |
| "${FILESDIR}/rust-${PV}-ld-argv0.patch" |
| "${FILESDIR}/rust-${PV}-Handle-sparse-git-repo-without-erroring.patch" |
| "${FILESDIR}/rust-${PV}-disable-mutable-noalias.patch" |
| "${FILESDIR}/rust-${PV}-add-armv7a-sanitizers.patch" |
| "${FILESDIR}/rust-${PV}-fix-libunwind-backtrace-visibility.patch" |
| ) |
| |
| # Locations where we cache our build/src dirs. |
| CROS_RUSTC_DIR="${SYSROOT}/var/cache/portage/${CATEGORY}/rust-artifacts" |
| CROS_RUSTC_BUILD_DIR="${CROS_RUSTC_DIR}/build" |
| CROS_RUSTC_SRC_DIR="${CROS_RUSTC_DIR}/src" |
| |
| S="${CROS_RUSTC_SRC_DIR}/${MY_P}-src" |
| |
| _CROS_RUSTC_PREPARED_STAMP="${CROS_RUSTC_SRC_DIR}/cros-rust-prepared" |
| _CROS_RUSTC_STAGE1_EXISTS_STAMP="${CROS_RUSTC_BUILD_DIR}/cros-rust-has-stage1-build" |
| |
| # @FUNCTION: cros-rustc_has_existing_checkout |
| # @DESCRIPTION: |
| # Tests whether we have a properly src_prepare'd checkout in ${CROS_RUSTC_DIR}. |
| cros-rustc_has_existing_checkout() { |
| [[ -e "${_CROS_RUSTC_PREPARED_STAMP}" ]] |
| } |
| |
| # @FUNCTION: cros-rustc_has_existing_stage1_build |
| # @DESCRIPTION: |
| # Tests whether ${CROS_RUSTC_BUILD_DIR} has a valid stage1 toolchain available. |
| cros-rustc_has_existing_stage1_build() { |
| [[ -e "${_CROS_RUSTC_STAGE1_EXISTS_STAMP}" ]] |
| } |
| |
| cros-rustc_pkg_setup() { |
| python-any-r1_pkg_setup |
| |
| if [[ ${MERGE_TYPE} != "binary" ]]; then |
| addwrite "${CROS_RUSTC_DIR}" |
| mkdir -p -m 755 "${CROS_RUSTC_DIR}" |
| chown "${PORTAGE_USERNAME}:${PORTAGE_GRPNAME}" "${CROS_RUSTC_DIR}" |
| fi |
| } |
| |
| cros-rustc_src_unpack() { |
| local dirs=( "${CROS_RUSTC_BUILD_DIR}" "${CROS_RUSTC_SRC_DIR}" ) |
| if [[ -e "${CROS_RUSTC_SRC_DIR}" || -e "${CROS_RUSTC_BUILD_DIR}" ]]; then |
| einfo "Removing old source/build directories..." |
| rm -rf "${dirs[@]}" |
| fi |
| |
| mkdir -p -m 755 "${dirs[@]}" |
| (cd "${CROS_RUSTC_SRC_DIR}" && default) |
| } |
| |
| cros-rustc_src_prepare() { |
| # Copy "unknown" vendor targets to create cros_sdk target triple |
| # variants as referred to in 0001-add-cros-targets.patch and |
| # RUSTC_TARGET_TRIPLES. armv7a is treated specially because the cros |
| # toolchain differs in more than just the vendor part of the target |
| # triple. The arch is armv7a in cros versus armv7. |
| pushd compiler/rustc_target/src/spec || die |
| sed -e 's:"unknown":"pc":g' x86_64_unknown_linux_gnu.rs >x86_64_pc_linux_gnu.rs || die |
| sed -e 's:"unknown":"cros":g' x86_64_unknown_linux_gnu.rs >x86_64_cros_linux_gnu.rs || die |
| sed -e 's:"unknown":"cros":g' armv7_unknown_linux_gnueabihf.rs >armv7a_cros_linux_gnueabihf.rs || die |
| sed -e 's:"unknown":"cros":g' aarch64_unknown_linux_gnu.rs >aarch64_cros_linux_gnu.rs || die |
| popd || die |
| |
| # The miri tool is built because of 'extended = true' in |
| # cros-config.toml, but the build is busted. See the upstream issue: |
| # [https://github.com/rust- lang/rust/issues/56576]. Because miri isn't |
| # installed or needed, this sed script eradicates the command that |
| # builds it during the bootstrap script. |
| pushd src/bootstrap || die |
| sed -i 's@tool::Miri,@@g' builder.rs |
| popd || die |
| |
| # Tsk. Tsk. The rust makefile for LLVM's compiler-rt uses -ffreestanding |
| # but one of the files includes <stdlib.h> causing occasional problems |
| # with MB_LEN_MAX. See crbug.com/730845 for the thrilling details. This |
| # line patches over the problematic include. |
| sed -e 's:#include <stdlib.h>:void abort(void);:g' \ |
| -i "${ECONF_SOURCE:-.}"/src/llvm-project/compiler-rt/lib/builtins/int_util.c || die |
| |
| # For the rustc_llvm module, the build will link with -nodefaultlibs and |
| # manually choose the std C++ library. For x86_64 Linux, the build |
| # script always chooses libstdc++ which will not work if LLVM was built |
| # with USE="default-libcxx". This snippet changes that choice to libc++ |
| # in the case that clang++ defaults to libc++. |
| if "${CXX}" -### -x c++ - < /dev/null 2>&1 | grep -q -e '-lc++'; then |
| sed -i 's:"stdc++":"c++":g' compiler/rustc_llvm/build.rs || die |
| fi |
| |
| default |
| |
| touch "${_CROS_RUSTC_PREPARED_STAMP}" |
| } |
| |
| cros-rustc_src_configure() { |
| tc-export PKG_CONFIG |
| |
| local targets="" |
| local tt |
| for tt in "${RUSTC_TARGET_TRIPLES[@]}" "${RUSTC_BARE_TARGET_TRIPLES[@]}" ; do |
| targets+="\"${tt}\", " |
| done |
| |
| local config=cros-config.toml |
| cat > "${config}" <<EOF |
| [build] |
| target = [${targets}] |
| cargo = "/opt/rust-bootstrap-${BOOTSTRAP_VERSION}/bin/cargo" |
| rustc = "/opt/rust-bootstrap-${BOOTSTRAP_VERSION}/bin/rustc" |
| docs = false |
| submodules = false |
| python = "${EPYTHON}" |
| vendor = true |
| extended = true |
| tools = ["cargo", "rustfmt", "clippy", "cargofmt"] |
| sanitizers = true |
| profiler = true |
| build-dir = "${CROS_RUSTC_BUILD_DIR}" |
| |
| [llvm] |
| ninja = true |
| targets = "AArch64;ARM;X86" |
| |
| [install] |
| prefix = "${ED}usr" |
| libdir = "$(get_libdir)" |
| mandir = "share/man" |
| |
| [rust] |
| default-linker = "${CBUILD}-clang" |
| description = "${PF}" |
| channel = "nightly" |
| codegen-units = 0 |
| llvm-libunwind = 'in-tree' |
| codegen-tests = false |
| new-symbol-mangling = true |
| |
| EOF |
| |
| for tt in "${RUSTC_TARGET_TRIPLES[@]}" ; do |
| cat >> "${config}" <<EOF |
| [target."${tt}"] |
| cc = "${tt}-clang" |
| cxx = "${tt}-clang++" |
| linker = "${tt}-clang++" |
| |
| EOF |
| done |
| } |
| |
| cros-rustc_src_compile() { |
| ${EPYTHON} x.py build --stage 2 --config cros-config.toml "$@" || die |
| |
| # Remove the src/rust symlink which will be dangling after sources are |
| # removed, and the containing src directory. |
| rm "${CROS_RUSTC_BUILD_DIR}/x86_64-unknown-linux-gnu/stage2/lib/rustlib/src/rust" || die |
| rmdir "${CROS_RUSTC_BUILD_DIR}/x86_64-unknown-linux-gnu/stage2/lib/rustlib/src" || die |
| |
| # Since we always build for stage2, we're guaranteed that stage1 exists |
| # at this point. |
| touch "${_CROS_RUSTC_STAGE1_EXISTS_STAMP}" |
| } |
| fi |