1 //! Compilation of native dependencies like LLVM.
3 //! Native projects like LLVM unfortunately aren't suited just yet for
4 //! compilation in build scripts that Cargo has. This is because the
5 //! compilation takes a *very* long time but also because we don't want to
6 //! compile LLVM 3 times as part of a normal bootstrap (we want it cached).
8 //! LLVM and compiler-rt are essentially just wired up to everything else to
9 //! ensure that they're always in place if needed.
12 use std::env::consts::EXE_EXTENSION;
13 use std::ffi::OsString;
14 use std::fs::{self, File};
16 use std::path::{Path, PathBuf};
17 use std::process::Command;
19 use build_helper::{output, t};
21 use crate::builder::{Builder, RunConfig, ShouldRun, Step};
22 use crate::config::TargetSelection;
23 use crate::util::{self, exe};
24 use crate::{Build, GitRepo};
25 use build_helper::up_to_date;
29 build_llvm_config: PathBuf,
34 // This returns whether we've already previously built LLVM.
36 // It's used to avoid busting caches during x.py check -- if we've already built
37 // LLVM, it's fine for us to not try to avoid doing so.
39 // This will return the llvm-config if it can get it (but it will not build it
41 pub fn prebuilt_llvm_config(
42 builder: &Builder<'_>,
43 target: TargetSelection,
44 ) -> Result<PathBuf, Meta> {
45 // If we're using a custom LLVM bail out here, but we can only use a
46 // custom LLVM for the build triple.
47 if let Some(config) = builder.config.target_config.get(&target) {
48 if let Some(ref s) = config.llvm_config {
49 check_llvm_version(builder, s);
50 return Ok(s.to_path_buf());
54 let root = "src/llvm-project/llvm";
55 let out_dir = builder.llvm_out(target);
57 let mut llvm_config_ret_dir = builder.llvm_out(builder.config.build);
58 if !builder.config.build.contains("msvc") || builder.ninja() {
59 llvm_config_ret_dir.push("build");
61 llvm_config_ret_dir.push("bin");
63 let build_llvm_config = llvm_config_ret_dir.join(exe("llvm-config", builder.config.build));
65 let stamp = out_dir.join("llvm-finished-building");
66 let stamp = HashStamp::new(stamp, builder.in_tree_llvm_info.sha());
68 if builder.config.llvm_skip_rebuild && stamp.path.exists() {
71 Using a potentially stale build of LLVM; \
72 This may not behave well.",
74 return Ok(build_llvm_config);
78 if stamp.hash.is_none() {
80 "Could not determine the LLVM submodule commit hash. \
81 Assuming that an LLVM rebuild is not necessary.",
83 builder.info(&format!(
84 "To force LLVM to rebuild, remove the file `{}`",
88 return Ok(build_llvm_config);
91 Err(Meta { stamp, build_llvm_config, out_dir, root: root.into() })
94 // modified from `check_submodule` and `update_submodule` in bootstrap.py
95 pub(crate) fn update_llvm_submodule(build: &Build) {
96 let llvm_project = &Path::new("src").join("llvm-project");
98 fn dir_is_empty(dir: &Path) -> bool {
99 t!(std::fs::read_dir(dir)).next().is_none()
102 if !build.config.submodules {
106 // NOTE: The check for the empty directory is here because when running x.py
107 // the first time, the llvm submodule won't be checked out. Check it out
108 // now so we can build it.
109 if !build.in_tree_llvm_info.is_git() && !dir_is_empty(&build.config.src.join(llvm_project)) {
114 if build.config.fast_submodules {
115 let checked_out_hash = output(
117 .args(&["rev-parse", "HEAD"])
118 .current_dir(build.config.src.join(llvm_project)),
121 let recorded = output(
123 .args(&["ls-tree", "HEAD"])
125 .current_dir(&build.config.src),
127 let actual_hash = recorded
130 .unwrap_or_else(|| panic!("unexpected output `{}`", recorded));
133 if actual_hash == checked_out_hash.trim_end() {
134 // already checked out
139 println!("Updating submodule {}", llvm_project.display());
142 .args(&["submodule", "-q", "sync"])
144 .current_dir(&build.config.src),
147 // Try passing `--progress` to start, then run git again without if that fails.
148 let update = |progress: bool| {
149 let mut git = Command::new("git");
150 git.args(&["submodule", "update", "--init", "--recursive"]);
152 git.arg("--progress");
154 git.arg(llvm_project).current_dir(&build.config.src);
157 // NOTE: doesn't use `try_run` because this shouldn't print an error if it fails.
158 if !update(true).status().map_or(false, |status| status.success()) {
159 build.run(&mut update(false));
164 .args(&["reset", "-q", "--hard"])
165 .current_dir(build.config.src.join(llvm_project)),
169 .args(&["clean", "-qdfx"])
170 .current_dir(build.config.src.join(llvm_project)),
174 #[derive(Debug, Copy, Clone, Hash, PartialEq, Eq)]
176 pub target: TargetSelection,
180 type Output = PathBuf; // path to llvm-config
182 const ONLY_HOSTS: bool = true;
184 fn should_run(run: ShouldRun<'_>) -> ShouldRun<'_> {
185 run.path("src/llvm-project").path("src/llvm-project/llvm").path("src/llvm")
188 fn make_run(run: RunConfig<'_>) {
189 run.builder.ensure(Llvm { target: run.target });
192 /// Compile LLVM for `target`.
193 fn run(self, builder: &Builder<'_>) -> PathBuf {
194 let target = self.target;
195 let target_native = if self.target.starts_with("riscv") {
196 // RISC-V target triples in Rust is not named the same as C compiler target triples.
197 // This converts Rust RISC-V target triples to C compiler triples.
198 let idx = target.triple.find('-').unwrap();
200 format!("riscv{}{}", &target.triple[5..7], &target.triple[idx..])
205 let Meta { stamp, build_llvm_config, out_dir, root } =
206 match prebuilt_llvm_config(builder, target) {
211 if !builder.config.dry_run {
212 update_llvm_submodule(builder);
214 if builder.config.llvm_link_shared
215 && (target.contains("windows") || target.contains("apple-darwin"))
217 panic!("shared linking to LLVM is not currently supported on {}", target.triple);
220 builder.info(&format!("Building LLVM for {}", target));
222 let _time = util::timeit(&builder);
223 t!(fs::create_dir_all(&out_dir));
225 // https://llvm.org/docs/CMake.html
226 let mut cfg = cmake::Config::new(builder.src.join(root));
228 let profile = match (builder.config.llvm_optimize, builder.config.llvm_release_debuginfo) {
229 (false, _) => "Debug",
230 (true, false) => "Release",
231 (true, true) => "RelWithDebInfo",
234 // NOTE: remember to also update `config.toml.example` when changing the
236 let llvm_targets = match &builder.config.llvm_targets {
239 "AArch64;ARM;BPF;Hexagon;MSP430;Mips;NVPTX;PowerPC;RISCV;\
240 Sparc;SystemZ;WebAssembly;X86"
244 let llvm_exp_targets = match builder.config.llvm_experimental_targets {
249 let assertions = if builder.config.llvm_assertions { "ON" } else { "OFF" };
251 cfg.out_dir(&out_dir)
253 .define("LLVM_ENABLE_ASSERTIONS", assertions)
254 .define("LLVM_TARGETS_TO_BUILD", llvm_targets)
255 .define("LLVM_EXPERIMENTAL_TARGETS_TO_BUILD", llvm_exp_targets)
256 .define("LLVM_INCLUDE_EXAMPLES", "OFF")
257 .define("LLVM_INCLUDE_DOCS", "OFF")
258 .define("LLVM_INCLUDE_BENCHMARKS", "OFF")
259 .define("LLVM_ENABLE_TERMINFO", "OFF")
260 .define("LLVM_ENABLE_LIBEDIT", "OFF")
261 .define("LLVM_ENABLE_BINDINGS", "OFF")
262 .define("LLVM_ENABLE_Z3_SOLVER", "OFF")
263 .define("LLVM_PARALLEL_COMPILE_JOBS", builder.jobs().to_string())
264 .define("LLVM_TARGET_ARCH", target_native.split('-').next().unwrap())
265 .define("LLVM_DEFAULT_TARGET_TRIPLE", target_native);
267 if target != "aarch64-apple-darwin" && !target.contains("windows") {
268 cfg.define("LLVM_ENABLE_ZLIB", "ON");
270 cfg.define("LLVM_ENABLE_ZLIB", "OFF");
273 // Are we compiling for iOS/tvOS?
274 if target.contains("apple-ios") || target.contains("apple-tvos") {
275 // These two defines prevent CMake from automatically trying to add a MacOSX sysroot, which leads to a compiler error.
276 cfg.define("CMAKE_OSX_SYSROOT", "/");
277 cfg.define("CMAKE_OSX_DEPLOYMENT_TARGET", "");
278 // Prevent cmake from adding -bundle to CFLAGS automatically, which leads to a compiler error because "-bitcode_bundle" also gets added.
279 cfg.define("LLVM_ENABLE_PLUGINS", "OFF");
280 // Zlib fails to link properly, leading to a compiler error.
281 cfg.define("LLVM_ENABLE_ZLIB", "OFF");
284 if builder.config.llvm_thin_lto {
285 cfg.define("LLVM_ENABLE_LTO", "Thin");
286 if !target.contains("apple") {
287 cfg.define("LLVM_ENABLE_LLD", "ON");
291 // This setting makes the LLVM tools link to the dynamic LLVM library,
292 // which saves both memory during parallel links and overall disk space
293 // for the tools. We don't do this on every platform as it doesn't work
294 // equally well everywhere.
296 // If we're not linking rustc to a dynamic LLVM, though, then don't link
298 if builder.llvm_link_tools_dynamically(target) && builder.config.llvm_link_shared {
299 cfg.define("LLVM_LINK_LLVM_DYLIB", "ON");
302 // For distribution we want the LLVM tools to be *statically* linked to libstdc++
303 if builder.config.llvm_tools_enabled {
304 if !target.contains("msvc") {
305 if target.contains("apple") {
306 cfg.define("CMAKE_EXE_LINKER_FLAGS", "-static-libstdc++");
308 cfg.define("CMAKE_EXE_LINKER_FLAGS", "-Wl,-Bsymbolic -static-libstdc++");
313 if target.starts_with("riscv") {
314 // In RISC-V, using C++ atomics require linking to `libatomic` but the LLVM build
315 // system check cannot detect this. Therefore it is set manually here.
316 if !builder.config.llvm_tools_enabled {
317 cfg.define("CMAKE_EXE_LINKER_FLAGS", "-latomic");
319 cfg.define("CMAKE_EXE_LINKER_FLAGS", "-latomic -static-libstdc++");
321 cfg.define("CMAKE_SHARED_LINKER_FLAGS", "-latomic");
324 if target.contains("msvc") {
325 cfg.define("LLVM_USE_CRT_DEBUG", "MT");
326 cfg.define("LLVM_USE_CRT_RELEASE", "MT");
327 cfg.define("LLVM_USE_CRT_RELWITHDEBINFO", "MT");
328 cfg.static_crt(true);
331 if target.starts_with("i686") {
332 cfg.define("LLVM_BUILD_32_BITS", "ON");
335 let mut enabled_llvm_projects = Vec::new();
337 if util::forcing_clang_based_tests() {
338 enabled_llvm_projects.push("clang");
339 enabled_llvm_projects.push("compiler-rt");
342 if builder.config.llvm_polly {
343 enabled_llvm_projects.push("polly");
346 // We want libxml to be disabled.
347 // See https://github.com/rust-lang/rust/pull/50104
348 cfg.define("LLVM_ENABLE_LIBXML2", "OFF");
350 if !enabled_llvm_projects.is_empty() {
351 enabled_llvm_projects.sort();
352 enabled_llvm_projects.dedup();
353 cfg.define("LLVM_ENABLE_PROJECTS", enabled_llvm_projects.join(";"));
356 if let Some(num_linkers) = builder.config.llvm_link_jobs {
358 cfg.define("LLVM_PARALLEL_LINK_JOBS", num_linkers.to_string());
362 // https://llvm.org/docs/HowToCrossCompileLLVM.html
363 if target != builder.config.build {
364 builder.ensure(Llvm { target: builder.config.build });
365 // FIXME: if the llvm root for the build triple is overridden then we
366 // should use llvm-tblgen from there, also should verify that it
367 // actually exists most of the time in normal installs of LLVM.
368 let host_bin = builder.llvm_out(builder.config.build).join("bin");
369 cfg.define("CMAKE_CROSSCOMPILING", "True");
370 cfg.define("LLVM_TABLEGEN", host_bin.join("llvm-tblgen").with_extension(EXE_EXTENSION));
371 cfg.define("LLVM_NM", host_bin.join("llvm-nm").with_extension(EXE_EXTENSION));
374 host_bin.join("llvm-config").with_extension(EXE_EXTENSION),
378 if let Some(ref suffix) = builder.config.llvm_version_suffix {
379 // Allow version-suffix="" to not define a version suffix at all.
380 if !suffix.is_empty() {
381 cfg.define("LLVM_VERSION_SUFFIX", suffix);
383 } else if builder.config.channel == "dev" {
384 // Changes to a version suffix require a complete rebuild of the LLVM.
385 // To avoid rebuilds during a time of version bump, don't include rustc
386 // release number on the dev channel.
387 cfg.define("LLVM_VERSION_SUFFIX", "-rust-dev");
389 let suffix = format!("-rust-{}-{}", builder.version, builder.config.channel);
390 cfg.define("LLVM_VERSION_SUFFIX", suffix);
393 if let Some(ref linker) = builder.config.llvm_use_linker {
394 cfg.define("LLVM_USE_LINKER", linker);
397 if builder.config.llvm_allow_old_toolchain {
398 cfg.define("LLVM_TEMPORARILY_ALLOW_OLD_TOOLCHAIN", "YES");
401 configure_cmake(builder, target, &mut cfg, true);
403 // FIXME: we don't actually need to build all LLVM tools and all LLVM
404 // libraries here, e.g., we just want a few components and a few
405 // tools. Figure out how to filter them down and only build the right
406 // tools and libs on all platforms.
408 if builder.config.dry_run {
409 return build_llvm_config;
420 fn check_llvm_version(builder: &Builder<'_>, llvm_config: &Path) {
421 if !builder.config.llvm_version_check {
425 if builder.config.dry_run {
429 let mut cmd = Command::new(llvm_config);
430 let version = output(cmd.arg("--version"));
431 let mut parts = version.split('.').take(2).filter_map(|s| s.parse::<u32>().ok());
432 if let (Some(major), Some(_minor)) = (parts.next(), parts.next()) {
437 panic!("\n\nbad LLVM version: {}, need >=10.0\n\n", version)
441 builder: &Builder<'_>,
442 target: TargetSelection,
443 cfg: &mut cmake::Config,
444 use_compiler_launcher: bool,
446 // Do not print installation messages for up-to-date files.
447 // LLVM and LLD builds can produce a lot of those and hit CI limits on log size.
448 cfg.define("CMAKE_INSTALL_MESSAGE", "LAZY");
450 // Do not allow the user's value of DESTDIR to influence where
451 // LLVM will install itself. LLVM must always be installed in our
452 // own build directories.
453 cfg.env("DESTDIR", "");
456 cfg.generator("Ninja");
458 cfg.target(&target.triple).host(&builder.config.build.triple);
460 if target != builder.config.build {
461 if target.contains("netbsd") {
462 cfg.define("CMAKE_SYSTEM_NAME", "NetBSD");
463 } else if target.contains("freebsd") {
464 cfg.define("CMAKE_SYSTEM_NAME", "FreeBSD");
465 } else if target.contains("windows") {
466 cfg.define("CMAKE_SYSTEM_NAME", "Windows");
467 } else if target.contains("haiku") {
468 cfg.define("CMAKE_SYSTEM_NAME", "Haiku");
469 } else if target.contains("solaris") || target.contains("illumos") {
470 cfg.define("CMAKE_SYSTEM_NAME", "SunOS");
472 // When cross-compiling we should also set CMAKE_SYSTEM_VERSION, but in
473 // that case like CMake we cannot easily determine system version either.
475 // Since, the LLVM itself makes rather limited use of version checks in
476 // CMakeFiles (and then only in tests), and so far no issues have been
477 // reported, the system version is currently left unset.
480 let sanitize_cc = |cc: &Path| {
481 if target.contains("msvc") {
482 OsString::from(cc.to_str().unwrap().replace("\\", "/"))
484 cc.as_os_str().to_owned()
488 // MSVC with CMake uses msbuild by default which doesn't respect these
489 // vars that we'd otherwise configure. In that case we just skip this
491 if target.contains("msvc") && !builder.ninja() {
495 let (cc, cxx) = match builder.config.llvm_clang_cl {
496 Some(ref cl) => (cl.as_ref(), cl.as_ref()),
497 None => (builder.cc(target), builder.cxx(target).unwrap()),
500 // Handle msvc + ninja + ccache specially (this is what the bots use)
501 if target.contains("msvc") && builder.ninja() && builder.config.ccache.is_some() {
502 let mut wrap_cc = env::current_exe().expect("failed to get cwd");
503 wrap_cc.set_file_name("sccache-plus-cl.exe");
505 cfg.define("CMAKE_C_COMPILER", sanitize_cc(&wrap_cc))
506 .define("CMAKE_CXX_COMPILER", sanitize_cc(&wrap_cc));
507 cfg.env("SCCACHE_PATH", builder.config.ccache.as_ref().unwrap())
508 .env("SCCACHE_TARGET", target.triple)
509 .env("SCCACHE_CC", &cc)
510 .env("SCCACHE_CXX", &cxx);
512 // Building LLVM on MSVC can be a little ludicrous at times. We're so far
513 // off the beaten path here that I'm not really sure this is even half
514 // supported any more. Here we're trying to:
516 // * Build LLVM on MSVC
517 // * Build LLVM with `clang-cl` instead of `cl.exe`
518 // * Build a project with `sccache`
519 // * Build for 32-bit as well
520 // * Build with Ninja
522 // For `cl.exe` there are different binaries to compile 32/64 bit which
523 // we use but for `clang-cl` there's only one which internally
524 // multiplexes via flags. As a result it appears that CMake's detection
525 // of a compiler's architecture and such on MSVC **doesn't** pass any
526 // custom flags we pass in CMAKE_CXX_FLAGS below. This means that if we
527 // use `clang-cl.exe` it's always diagnosed as a 64-bit compiler which
528 // definitely causes problems since all the env vars are pointing to
531 // To hack around this... again... we pass an argument that's
532 // unconditionally passed in the sccache shim. This'll get CMake to
533 // correctly diagnose it's doing a 32-bit compilation and LLVM will
534 // internally configure itself appropriately.
535 if builder.config.llvm_clang_cl.is_some() && target.contains("i686") {
536 cfg.env("SCCACHE_EXTRA_ARGS", "-m32");
539 // If ccache is configured we inform the build a little differently how
540 // to invoke ccache while also invoking our compilers.
541 if use_compiler_launcher {
542 if let Some(ref ccache) = builder.config.ccache {
543 cfg.define("CMAKE_C_COMPILER_LAUNCHER", ccache)
544 .define("CMAKE_CXX_COMPILER_LAUNCHER", ccache);
547 cfg.define("CMAKE_C_COMPILER", sanitize_cc(cc))
548 .define("CMAKE_CXX_COMPILER", sanitize_cc(cxx))
549 .define("CMAKE_ASM_COMPILER", sanitize_cc(cc));
552 cfg.build_arg("-j").build_arg(builder.jobs().to_string());
553 let mut cflags = builder.cflags(target, GitRepo::Llvm).join(" ");
554 if let Some(ref s) = builder.config.llvm_cflags {
555 cflags.push_str(&format!(" {}", s));
557 // Some compiler features used by LLVM (such as thread locals) will not work on a min version below iOS 10.
558 if target.contains("apple-ios") {
559 if target.contains("86-") {
560 cflags.push_str(" -miphonesimulator-version-min=10.0");
562 cflags.push_str(" -miphoneos-version-min=10.0");
565 if builder.config.llvm_clang_cl.is_some() {
566 cflags.push_str(&format!(" --target={}", target))
568 cfg.define("CMAKE_C_FLAGS", cflags);
569 let mut cxxflags = builder.cflags(target, GitRepo::Llvm).join(" ");
570 if builder.config.llvm_static_stdcpp && !target.contains("msvc") && !target.contains("netbsd") {
571 cxxflags.push_str(" -static-libstdc++");
573 if let Some(ref s) = builder.config.llvm_cxxflags {
574 cxxflags.push_str(&format!(" {}", s));
576 if builder.config.llvm_clang_cl.is_some() {
577 cxxflags.push_str(&format!(" --target={}", target))
579 cfg.define("CMAKE_CXX_FLAGS", cxxflags);
580 if let Some(ar) = builder.ar(target) {
581 if ar.is_absolute() {
582 // LLVM build breaks if `CMAKE_AR` is a relative path, for some reason it
583 // tries to resolve this path in the LLVM build directory.
584 cfg.define("CMAKE_AR", sanitize_cc(ar));
588 if let Some(ranlib) = builder.ranlib(target) {
589 if ranlib.is_absolute() {
590 // LLVM build breaks if `CMAKE_RANLIB` is a relative path, for some reason it
591 // tries to resolve this path in the LLVM build directory.
592 cfg.define("CMAKE_RANLIB", sanitize_cc(ranlib));
596 if let Some(ref s) = builder.config.llvm_ldflags {
597 cfg.define("CMAKE_SHARED_LINKER_FLAGS", s);
598 cfg.define("CMAKE_MODULE_LINKER_FLAGS", s);
599 cfg.define("CMAKE_EXE_LINKER_FLAGS", s);
602 if env::var_os("SCCACHE_ERROR_LOG").is_some() {
603 cfg.env("RUSTC_LOG", "sccache=warn");
607 #[derive(Debug, Copy, Clone, Hash, PartialEq, Eq)]
609 pub target: TargetSelection,
613 type Output = PathBuf;
614 const ONLY_HOSTS: bool = true;
616 fn should_run(run: ShouldRun<'_>) -> ShouldRun<'_> {
617 run.path("src/llvm-project/lld").path("src/tools/lld")
620 fn make_run(run: RunConfig<'_>) {
621 run.builder.ensure(Lld { target: run.target });
624 /// Compile LLD for `target`.
625 fn run(self, builder: &Builder<'_>) -> PathBuf {
626 if builder.config.dry_run {
627 return PathBuf::from("lld-out-dir-test-gen");
629 let target = self.target;
631 let llvm_config = builder.ensure(Llvm { target: self.target });
633 let out_dir = builder.lld_out(target);
634 let done_stamp = out_dir.join("lld-finished-building");
635 if done_stamp.exists() {
639 builder.info(&format!("Building LLD for {}", target));
640 let _time = util::timeit(&builder);
641 t!(fs::create_dir_all(&out_dir));
643 let mut cfg = cmake::Config::new(builder.src.join("src/llvm-project/lld"));
644 configure_cmake(builder, target, &mut cfg, true);
646 // This is an awful, awful hack. Discovered when we migrated to using
647 // clang-cl to compile LLVM/LLD it turns out that LLD, when built out of
648 // tree, will execute `llvm-config --cmakedir` and then tell CMake about
649 // that directory for later processing. Unfortunately if this path has
650 // forward slashes in it (which it basically always does on Windows)
651 // then CMake will hit a syntax error later on as... something isn't
654 // Instead of attempting to fix this problem in upstream CMake and/or
655 // LLVM/LLD we just hack around it here. This thin wrapper will take the
656 // output from llvm-config and replace all instances of `\` with `/` to
657 // ensure we don't hit the same bugs with escaping. It means that you
658 // can't build on a system where your paths require `\` on Windows, but
659 // there's probably a lot of reasons you can't do that other than this.
660 let llvm_config_shim = env::current_exe().unwrap().with_file_name("llvm-config-wrapper");
662 cfg.out_dir(&out_dir)
664 .env("LLVM_CONFIG_REAL", &llvm_config)
665 .define("LLVM_CONFIG_PATH", llvm_config_shim)
666 .define("LLVM_INCLUDE_TESTS", "OFF");
668 // While we're using this horrible workaround to shim the execution of
669 // llvm-config, let's just pile on more. I can't seem to figure out how
670 // to build LLD as a standalone project and also cross-compile it at the
671 // same time. It wants a natively executable `llvm-config` to learn
672 // about LLVM, but then it learns about all the host configuration of
673 // LLVM and tries to link to host LLVM libraries.
675 // To work around that we tell our shim to replace anything with the
676 // build target with the actual target instead. This'll break parts of
677 // LLD though which try to execute host tools, such as llvm-tblgen, so
678 // we specifically tell it where to find those. This is likely super
679 // brittle and will break over time. If anyone knows better how to
680 // cross-compile LLD it would be much appreciated to fix this!
681 if target != builder.config.build {
682 cfg.env("LLVM_CONFIG_SHIM_REPLACE", &builder.config.build.triple)
683 .env("LLVM_CONFIG_SHIM_REPLACE_WITH", &target.triple)
686 llvm_config.with_file_name("llvm-tblgen").with_extension(EXE_EXTENSION),
690 // Explicitly set C++ standard, because upstream doesn't do so
691 // for standalone builds.
692 cfg.define("CMAKE_CXX_STANDARD", "14");
696 t!(File::create(&done_stamp));
701 #[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
702 pub struct TestHelpers {
703 pub target: TargetSelection,
706 impl Step for TestHelpers {
709 fn should_run(run: ShouldRun<'_>) -> ShouldRun<'_> {
710 run.path("src/test/auxiliary/rust_test_helpers.c")
713 fn make_run(run: RunConfig<'_>) {
714 run.builder.ensure(TestHelpers { target: run.target })
717 /// Compiles the `rust_test_helpers.c` library which we used in various
718 /// `run-pass` tests for ABI testing.
719 fn run(self, builder: &Builder<'_>) {
720 if builder.config.dry_run {
723 // The x86_64-fortanix-unknown-sgx target doesn't have a working C
724 // toolchain. However, some x86_64 ELF objects can be linked
725 // without issues. Use this hack to compile the test helpers.
726 let target = if self.target == "x86_64-fortanix-unknown-sgx" {
727 TargetSelection::from_user("x86_64-unknown-linux-gnu")
731 let dst = builder.test_helpers_out(target);
732 let src = builder.src.join("src/test/auxiliary/rust_test_helpers.c");
733 if up_to_date(&src, &dst.join("librust_test_helpers.a")) {
737 builder.info("Building test helpers");
738 t!(fs::create_dir_all(&dst));
739 let mut cfg = cc::Build::new();
740 // FIXME: Workaround for https://github.com/emscripten-core/emscripten/issues/9013
741 if target.contains("emscripten") {
745 // We may have found various cross-compilers a little differently due to our
746 // extra configuration, so inform cc of these compilers. Note, though, that
747 // on MSVC we still need cc's detection of env vars (ugh).
748 if !target.contains("msvc") {
749 if let Some(ar) = builder.ar(target) {
752 cfg.compiler(builder.cc(target));
754 cfg.cargo_metadata(false)
756 .target(&target.triple)
757 .host(&builder.config.build.triple)
761 .file(builder.src.join("src/test/auxiliary/rust_test_helpers.c"))
762 .compile("rust_test_helpers");
766 #[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
767 pub struct Sanitizers {
768 pub target: TargetSelection,
771 impl Step for Sanitizers {
772 type Output = Vec<SanitizerRuntime>;
774 fn should_run(run: ShouldRun<'_>) -> ShouldRun<'_> {
775 run.path("src/llvm-project/compiler-rt").path("src/sanitizers")
778 fn make_run(run: RunConfig<'_>) {
779 run.builder.ensure(Sanitizers { target: run.target });
782 /// Builds sanitizer runtime libraries.
783 fn run(self, builder: &Builder<'_>) -> Self::Output {
784 let compiler_rt_dir = builder.src.join("src/llvm-project/compiler-rt");
785 if !compiler_rt_dir.exists() {
789 let out_dir = builder.native_dir(self.target).join("sanitizers");
790 let runtimes = supported_sanitizers(&out_dir, self.target, &builder.config.channel);
791 if runtimes.is_empty() {
795 let llvm_config = builder.ensure(Llvm { target: builder.config.build });
796 if builder.config.dry_run {
800 let stamp = out_dir.join("sanitizers-finished-building");
801 let stamp = HashStamp::new(stamp, builder.in_tree_llvm_info.sha());
804 if stamp.hash.is_none() {
805 builder.info(&format!(
806 "Rebuild sanitizers by removing the file `{}`",
813 builder.info(&format!("Building sanitizers for {}", self.target));
815 let _time = util::timeit(&builder);
817 let mut cfg = cmake::Config::new(&compiler_rt_dir);
818 cfg.profile("Release");
819 cfg.define("CMAKE_C_COMPILER_TARGET", self.target.triple);
820 cfg.define("COMPILER_RT_BUILD_BUILTINS", "OFF");
821 cfg.define("COMPILER_RT_BUILD_CRT", "OFF");
822 cfg.define("COMPILER_RT_BUILD_LIBFUZZER", "OFF");
823 cfg.define("COMPILER_RT_BUILD_PROFILE", "OFF");
824 cfg.define("COMPILER_RT_BUILD_SANITIZERS", "ON");
825 cfg.define("COMPILER_RT_BUILD_XRAY", "OFF");
826 cfg.define("COMPILER_RT_DEFAULT_TARGET_ONLY", "ON");
827 cfg.define("COMPILER_RT_USE_LIBCXX", "OFF");
828 cfg.define("LLVM_CONFIG_PATH", &llvm_config);
830 // On Darwin targets the sanitizer runtimes are build as universal binaries.
831 // Unfortunately sccache currently lacks support to build them successfully.
832 // Disable compiler launcher on Darwin targets to avoid potential issues.
833 let use_compiler_launcher = !self.target.contains("apple-darwin");
834 configure_cmake(builder, self.target, &mut cfg, use_compiler_launcher);
836 t!(fs::create_dir_all(&out_dir));
837 cfg.out_dir(out_dir);
839 for runtime in &runtimes {
840 cfg.build_target(&runtime.cmake_target);
849 #[derive(Clone, Debug)]
850 pub struct SanitizerRuntime {
851 /// CMake target used to build the runtime.
852 pub cmake_target: String,
853 /// Path to the built runtime library.
855 /// Library filename that will be used rustc.
859 /// Returns sanitizers available on a given target.
860 fn supported_sanitizers(
862 target: TargetSelection,
864 ) -> Vec<SanitizerRuntime> {
865 let darwin_libs = |os: &str, components: &[&str]| -> Vec<SanitizerRuntime> {
868 .map(move |c| SanitizerRuntime {
869 cmake_target: format!("clang_rt.{}_{}_dynamic", c, os),
871 .join(&format!("build/lib/darwin/libclang_rt.{}_{}_dynamic.dylib", c, os)),
872 name: format!("librustc-{}_rt.{}.dylib", channel, c),
877 let common_libs = |os: &str, arch: &str, components: &[&str]| -> Vec<SanitizerRuntime> {
880 .map(move |c| SanitizerRuntime {
881 cmake_target: format!("clang_rt.{}-{}", c, arch),
882 path: out_dir.join(&format!("build/lib/{}/libclang_rt.{}-{}.a", os, c, arch)),
883 name: format!("librustc-{}_rt.{}.a", channel, c),
888 match &*target.triple {
889 "aarch64-apple-darwin" => darwin_libs("osx", &["asan", "lsan", "tsan"]),
890 "aarch64-fuchsia" => common_libs("fuchsia", "aarch64", &["asan"]),
891 "aarch64-unknown-linux-gnu" => {
892 common_libs("linux", "aarch64", &["asan", "lsan", "msan", "tsan", "hwasan"])
894 "x86_64-apple-darwin" => darwin_libs("osx", &["asan", "lsan", "tsan"]),
895 "x86_64-fuchsia" => common_libs("fuchsia", "x86_64", &["asan"]),
896 "x86_64-unknown-freebsd" => common_libs("freebsd", "x86_64", &["asan", "msan", "tsan"]),
897 "x86_64-unknown-linux-gnu" => {
898 common_libs("linux", "x86_64", &["asan", "lsan", "msan", "tsan"])
900 "x86_64-unknown-linux-musl" => {
901 common_libs("linux", "x86_64", &["asan", "lsan", "msan", "tsan"])
909 hash: Option<Vec<u8>>,
913 fn new(path: PathBuf, hash: Option<&str>) -> Self {
914 HashStamp { path, hash: hash.map(|s| s.as_bytes().to_owned()) }
917 fn is_done(&self) -> bool {
918 match fs::read(&self.path) {
919 Ok(h) => self.hash.as_deref().unwrap_or(b"") == h.as_slice(),
920 Err(e) if e.kind() == io::ErrorKind::NotFound => false,
922 panic!("failed to read stamp file `{}`: {}", self.path.display(), e);
927 fn remove(&self) -> io::Result<()> {
928 match fs::remove_file(&self.path) {
931 if e.kind() == io::ErrorKind::NotFound {
940 fn write(&self) -> io::Result<()> {
941 fs::write(&self.path, self.hash.as_deref().unwrap_or(b""))
945 #[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
946 pub struct CrtBeginEnd {
947 pub target: TargetSelection,
950 impl Step for CrtBeginEnd {
951 type Output = PathBuf;
953 fn should_run(run: ShouldRun<'_>) -> ShouldRun<'_> {
954 run.path("src/llvm-project/compiler-rt/lib/crt")
957 fn make_run(run: RunConfig<'_>) {
958 run.builder.ensure(CrtBeginEnd { target: run.target });
961 /// Build crtbegin.o/crtend.o for musl target.
962 fn run(self, builder: &Builder<'_>) -> Self::Output {
963 let out_dir = builder.native_dir(self.target).join("crt");
965 if builder.config.dry_run {
969 let crtbegin_src = builder.src.join("src/llvm-project/compiler-rt/lib/crt/crtbegin.c");
970 let crtend_src = builder.src.join("src/llvm-project/compiler-rt/lib/crt/crtend.c");
971 if up_to_date(&crtbegin_src, &out_dir.join("crtbegin.o"))
972 && up_to_date(&crtend_src, &out_dir.join("crtendS.o"))
977 builder.info("Building crtbegin.o and crtend.o");
978 t!(fs::create_dir_all(&out_dir));
980 let mut cfg = cc::Build::new();
982 if let Some(ar) = builder.ar(self.target) {
985 cfg.compiler(builder.cc(self.target));
986 cfg.cargo_metadata(false)
988 .target(&self.target.triple)
989 .host(&builder.config.build.triple)
996 // Those flags are defined in src/llvm-project/compiler-rt/lib/crt/CMakeLists.txt
997 // Currently only consumer of those objects is musl, which use .init_array/.fini_array
998 // instead of .ctors/.dtors
1000 .define("CRT_HAS_INITFINI_ARRAY", None)
1001 .define("EH_USE_FRAME_REGISTRY", None);
1005 t!(fs::copy(out_dir.join("crtbegin.o"), out_dir.join("crtbeginS.o")));
1006 t!(fs::copy(out_dir.join("crtend.o"), out_dir.join("crtendS.o")));