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};
23 use crate::config::TargetSelection;
24 use crate::util::{self, exe};
26 use build_helper::up_to_date;
30 build_llvm_config: PathBuf,
35 // This returns whether we've already previously built LLVM.
37 // It's used to avoid busting caches during x.py check -- if we've already built
38 // LLVM, it's fine for us to not try to avoid doing so.
40 // This will return the llvm-config if it can get it (but it will not build it
42 pub fn prebuilt_llvm_config(
43 builder: &Builder<'_>,
44 target: TargetSelection,
45 ) -> Result<PathBuf, Meta> {
46 // If we're using a custom LLVM bail out here, but we can only use a
47 // custom LLVM for the build triple.
48 if let Some(config) = builder.config.target_config.get(&target) {
49 if let Some(ref s) = config.llvm_config {
50 check_llvm_version(builder, s);
51 return Ok(s.to_path_buf());
55 let root = "src/llvm-project/llvm";
56 let out_dir = builder.llvm_out(target);
58 let mut llvm_config_ret_dir = builder.llvm_out(builder.config.build);
59 if !builder.config.build.contains("msvc") || builder.config.ninja {
60 llvm_config_ret_dir.push("build");
62 llvm_config_ret_dir.push("bin");
64 let build_llvm_config = llvm_config_ret_dir.join(exe("llvm-config", builder.config.build));
66 let stamp = out_dir.join("llvm-finished-building");
67 let stamp = HashStamp::new(stamp, builder.in_tree_llvm_info.sha());
69 if builder.config.llvm_skip_rebuild && stamp.path.exists() {
72 Using a potentially stale build of LLVM; \
73 This may not behave well.",
75 return Ok(build_llvm_config);
79 if stamp.hash.is_none() {
81 "Could not determine the LLVM submodule commit hash. \
82 Assuming that an LLVM rebuild is not necessary.",
84 builder.info(&format!(
85 "To force LLVM to rebuild, remove the file `{}`",
89 return Ok(build_llvm_config);
92 Err(Meta { stamp, build_llvm_config, out_dir, root: root.into() })
95 #[derive(Debug, Copy, Clone, Hash, PartialEq, Eq)]
97 pub target: TargetSelection,
101 type Output = PathBuf; // path to llvm-config
103 const ONLY_HOSTS: bool = true;
105 fn should_run(run: ShouldRun<'_>) -> ShouldRun<'_> {
106 run.path("src/llvm-project").path("src/llvm-project/llvm").path("src/llvm")
109 fn make_run(run: RunConfig<'_>) {
110 run.builder.ensure(Llvm { target: run.target });
113 /// Compile LLVM for `target`.
114 fn run(self, builder: &Builder<'_>) -> PathBuf {
115 let target = self.target;
116 let target_native = if self.target.starts_with("riscv") {
117 // RISC-V target triples in Rust is not named the same as C compiler target triples.
118 // This converts Rust RISC-V target triples to C compiler triples.
119 let idx = target.triple.find('-').unwrap();
121 format!("riscv{}{}", &target.triple[5..7], &target.triple[idx..])
126 let Meta { stamp, build_llvm_config, out_dir, root } =
127 match prebuilt_llvm_config(builder, target) {
132 builder.info(&format!("Building LLVM for {}", target));
134 let _time = util::timeit(&builder);
135 t!(fs::create_dir_all(&out_dir));
137 // http://llvm.org/docs/CMake.html
138 let mut cfg = cmake::Config::new(builder.src.join(root));
140 let profile = match (builder.config.llvm_optimize, builder.config.llvm_release_debuginfo) {
141 (false, _) => "Debug",
142 (true, false) => "Release",
143 (true, true) => "RelWithDebInfo",
146 // NOTE: remember to also update `config.toml.example` when changing the
148 let llvm_targets = match &builder.config.llvm_targets {
151 "AArch64;ARM;Hexagon;MSP430;Mips;NVPTX;PowerPC;RISCV;\
152 Sparc;SystemZ;WebAssembly;X86"
156 let llvm_exp_targets = match builder.config.llvm_experimental_targets {
161 let assertions = if builder.config.llvm_assertions { "ON" } else { "OFF" };
163 cfg.out_dir(&out_dir)
165 .define("LLVM_ENABLE_ASSERTIONS", assertions)
166 .define("LLVM_TARGETS_TO_BUILD", llvm_targets)
167 .define("LLVM_EXPERIMENTAL_TARGETS_TO_BUILD", llvm_exp_targets)
168 .define("LLVM_INCLUDE_EXAMPLES", "OFF")
169 .define("LLVM_INCLUDE_TESTS", "OFF")
170 .define("LLVM_INCLUDE_DOCS", "OFF")
171 .define("LLVM_INCLUDE_BENCHMARKS", "OFF")
172 .define("WITH_POLLY", "OFF")
173 .define("LLVM_ENABLE_TERMINFO", "OFF")
174 .define("LLVM_ENABLE_LIBEDIT", "OFF")
175 .define("LLVM_ENABLE_BINDINGS", "OFF")
176 .define("LLVM_ENABLE_Z3_SOLVER", "OFF")
177 .define("LLVM_PARALLEL_COMPILE_JOBS", builder.jobs().to_string())
178 .define("LLVM_TARGET_ARCH", target_native.split('-').next().unwrap())
179 .define("LLVM_DEFAULT_TARGET_TRIPLE", target_native);
181 if !target.contains("netbsd") && target != "aarch64-apple-darwin" {
182 cfg.define("LLVM_ENABLE_ZLIB", "ON");
184 // FIXME: Enable zlib on NetBSD too
185 // https://github.com/rust-lang/rust/pull/72696#issuecomment-641517185
186 cfg.define("LLVM_ENABLE_ZLIB", "OFF");
189 // Are we compiling for iOS/tvOS?
190 if target.contains("apple-ios") || target.contains("apple-tvos") {
191 // These two defines prevent CMake from automatically trying to add a MacOSX sysroot, which leads to a compiler error.
192 cfg.define("CMAKE_OSX_SYSROOT", "/");
193 cfg.define("CMAKE_OSX_DEPLOYMENT_TARGET", "");
194 // Prevent cmake from adding -bundle to CFLAGS automatically, which leads to a compiler error because "-bitcode_bundle" also gets added.
195 cfg.define("LLVM_ENABLE_PLUGINS", "OFF");
196 // Zlib fails to link properly, leading to a compiler error.
197 cfg.define("LLVM_ENABLE_ZLIB", "OFF");
200 if builder.config.llvm_thin_lto {
201 cfg.define("LLVM_ENABLE_LTO", "Thin");
202 if !target.contains("apple") {
203 cfg.define("LLVM_ENABLE_LLD", "ON");
207 // This setting makes the LLVM tools link to the dynamic LLVM library,
208 // which saves both memory during parallel links and overall disk space
209 // for the tools. We don't do this on every platform as it doesn't work
210 // equally well everywhere.
211 if builder.llvm_link_tools_dynamically(target) {
212 cfg.define("LLVM_LINK_LLVM_DYLIB", "ON");
215 // For distribution we want the LLVM tools to be *statically* linked to libstdc++
216 if builder.config.llvm_tools_enabled {
217 if !target.contains("msvc") {
218 if target.contains("apple") {
219 cfg.define("CMAKE_EXE_LINKER_FLAGS", "-static-libstdc++");
221 cfg.define("CMAKE_EXE_LINKER_FLAGS", "-Wl,-Bsymbolic -static-libstdc++");
226 if target.starts_with("riscv") {
227 // In RISC-V, using C++ atomics require linking to `libatomic` but the LLVM build
228 // system check cannot detect this. Therefore it is set manually here.
229 if !builder.config.llvm_tools_enabled {
230 cfg.define("CMAKE_EXE_LINKER_FLAGS", "-latomic");
232 cfg.define("CMAKE_EXE_LINKER_FLAGS", "-latomic -static-libstdc++");
234 cfg.define("CMAKE_SHARED_LINKER_FLAGS", "-latomic");
237 if target.contains("msvc") {
238 cfg.define("LLVM_USE_CRT_DEBUG", "MT");
239 cfg.define("LLVM_USE_CRT_RELEASE", "MT");
240 cfg.define("LLVM_USE_CRT_RELWITHDEBINFO", "MT");
241 cfg.static_crt(true);
244 if target.starts_with("i686") {
245 cfg.define("LLVM_BUILD_32_BITS", "ON");
248 let mut enabled_llvm_projects = Vec::new();
250 if util::forcing_clang_based_tests() {
251 enabled_llvm_projects.push("clang");
252 enabled_llvm_projects.push("compiler-rt");
255 // We want libxml to be disabled.
256 // See https://github.com/rust-lang/rust/pull/50104
257 cfg.define("LLVM_ENABLE_LIBXML2", "OFF");
259 if !enabled_llvm_projects.is_empty() {
260 enabled_llvm_projects.sort();
261 enabled_llvm_projects.dedup();
262 cfg.define("LLVM_ENABLE_PROJECTS", enabled_llvm_projects.join(";"));
265 if let Some(num_linkers) = builder.config.llvm_link_jobs {
267 cfg.define("LLVM_PARALLEL_LINK_JOBS", num_linkers.to_string());
271 // http://llvm.org/docs/HowToCrossCompileLLVM.html
272 if target != builder.config.build {
273 builder.ensure(Llvm { target: builder.config.build });
274 // FIXME: if the llvm root for the build triple is overridden then we
275 // should use llvm-tblgen from there, also should verify that it
276 // actually exists most of the time in normal installs of LLVM.
277 let host_bin = builder.llvm_out(builder.config.build).join("bin");
278 cfg.define("CMAKE_CROSSCOMPILING", "True");
279 cfg.define("LLVM_TABLEGEN", host_bin.join("llvm-tblgen").with_extension(EXE_EXTENSION));
280 cfg.define("LLVM_NM", host_bin.join("llvm-nm").with_extension(EXE_EXTENSION));
283 host_bin.join("llvm-config").with_extension(EXE_EXTENSION),
287 if let Some(ref suffix) = builder.config.llvm_version_suffix {
288 // Allow version-suffix="" to not define a version suffix at all.
289 if !suffix.is_empty() {
290 cfg.define("LLVM_VERSION_SUFFIX", suffix);
292 } else if builder.config.channel == "dev" {
293 // Changes to a version suffix require a complete rebuild of the LLVM.
294 // To avoid rebuilds during a time of version bump, don't include rustc
295 // release number on the dev channel.
296 cfg.define("LLVM_VERSION_SUFFIX", "-rust-dev");
298 let suffix = format!("-rust-{}-{}", channel::CFG_RELEASE_NUM, builder.config.channel);
299 cfg.define("LLVM_VERSION_SUFFIX", suffix);
302 if let Some(ref linker) = builder.config.llvm_use_linker {
303 cfg.define("LLVM_USE_LINKER", linker);
306 if let Some(true) = builder.config.llvm_allow_old_toolchain {
307 cfg.define("LLVM_TEMPORARILY_ALLOW_OLD_TOOLCHAIN", "YES");
310 if let Some(ref python) = builder.config.python {
311 cfg.define("PYTHON_EXECUTABLE", python);
314 configure_cmake(builder, target, &mut cfg, true);
316 // FIXME: we don't actually need to build all LLVM tools and all LLVM
317 // libraries here, e.g., we just want a few components and a few
318 // tools. Figure out how to filter them down and only build the right
319 // tools and libs on all platforms.
321 if builder.config.dry_run {
322 return build_llvm_config;
333 fn check_llvm_version(builder: &Builder<'_>, llvm_config: &Path) {
334 if !builder.config.llvm_version_check {
338 if builder.config.dry_run {
342 let mut cmd = Command::new(llvm_config);
343 let version = output(cmd.arg("--version"));
344 let mut parts = version.split('.').take(2).filter_map(|s| s.parse::<u32>().ok());
345 if let (Some(major), Some(_minor)) = (parts.next(), parts.next()) {
350 panic!("\n\nbad LLVM version: {}, need >=8.0\n\n", version)
354 builder: &Builder<'_>,
355 target: TargetSelection,
356 cfg: &mut cmake::Config,
357 use_compiler_launcher: bool,
359 // Do not print installation messages for up-to-date files.
360 // LLVM and LLD builds can produce a lot of those and hit CI limits on log size.
361 cfg.define("CMAKE_INSTALL_MESSAGE", "LAZY");
363 // Do not allow the user's value of DESTDIR to influence where
364 // LLVM will install itself. LLVM must always be installed in our
365 // own build directories.
366 cfg.env("DESTDIR", "");
368 if builder.config.ninja {
369 cfg.generator("Ninja");
371 cfg.target(&target.triple).host(&builder.config.build.triple);
373 if target != builder.config.build {
374 if target.contains("netbsd") {
375 cfg.define("CMAKE_SYSTEM_NAME", "NetBSD");
376 } else if target.contains("freebsd") {
377 cfg.define("CMAKE_SYSTEM_NAME", "FreeBSD");
378 } else if target.contains("windows") {
379 cfg.define("CMAKE_SYSTEM_NAME", "Windows");
381 // When cross-compiling we should also set CMAKE_SYSTEM_VERSION, but in
382 // that case like CMake we cannot easily determine system version either.
384 // Since, the LLVM itself makes rather limited use of version checks in
385 // CMakeFiles (and then only in tests), and so far no issues have been
386 // reported, the system version is currently left unset.
389 let sanitize_cc = |cc: &Path| {
390 if target.contains("msvc") {
391 OsString::from(cc.to_str().unwrap().replace("\\", "/"))
393 cc.as_os_str().to_owned()
397 // MSVC with CMake uses msbuild by default which doesn't respect these
398 // vars that we'd otherwise configure. In that case we just skip this
400 if target.contains("msvc") && !builder.config.ninja {
404 let (cc, cxx) = match builder.config.llvm_clang_cl {
405 Some(ref cl) => (cl.as_ref(), cl.as_ref()),
406 None => (builder.cc(target), builder.cxx(target).unwrap()),
409 // Handle msvc + ninja + ccache specially (this is what the bots use)
410 if target.contains("msvc") && builder.config.ninja && builder.config.ccache.is_some() {
411 let mut wrap_cc = env::current_exe().expect("failed to get cwd");
412 wrap_cc.set_file_name("sccache-plus-cl.exe");
414 cfg.define("CMAKE_C_COMPILER", sanitize_cc(&wrap_cc))
415 .define("CMAKE_CXX_COMPILER", sanitize_cc(&wrap_cc));
416 cfg.env("SCCACHE_PATH", builder.config.ccache.as_ref().unwrap())
417 .env("SCCACHE_TARGET", target.triple)
418 .env("SCCACHE_CC", &cc)
419 .env("SCCACHE_CXX", &cxx);
421 // Building LLVM on MSVC can be a little ludicrous at times. We're so far
422 // off the beaten path here that I'm not really sure this is even half
423 // supported any more. Here we're trying to:
425 // * Build LLVM on MSVC
426 // * Build LLVM with `clang-cl` instead of `cl.exe`
427 // * Build a project with `sccache`
428 // * Build for 32-bit as well
429 // * Build with Ninja
431 // For `cl.exe` there are different binaries to compile 32/64 bit which
432 // we use but for `clang-cl` there's only one which internally
433 // multiplexes via flags. As a result it appears that CMake's detection
434 // of a compiler's architecture and such on MSVC **doesn't** pass any
435 // custom flags we pass in CMAKE_CXX_FLAGS below. This means that if we
436 // use `clang-cl.exe` it's always diagnosed as a 64-bit compiler which
437 // definitely causes problems since all the env vars are pointing to
440 // To hack around this... again... we pass an argument that's
441 // unconditionally passed in the sccache shim. This'll get CMake to
442 // correctly diagnose it's doing a 32-bit compilation and LLVM will
443 // internally configure itself appropriately.
444 if builder.config.llvm_clang_cl.is_some() && target.contains("i686") {
445 cfg.env("SCCACHE_EXTRA_ARGS", "-m32");
448 // If ccache is configured we inform the build a little differently how
449 // to invoke ccache while also invoking our compilers.
450 if use_compiler_launcher {
451 if let Some(ref ccache) = builder.config.ccache {
452 cfg.define("CMAKE_C_COMPILER_LAUNCHER", ccache)
453 .define("CMAKE_CXX_COMPILER_LAUNCHER", ccache);
456 cfg.define("CMAKE_C_COMPILER", sanitize_cc(cc))
457 .define("CMAKE_CXX_COMPILER", sanitize_cc(cxx))
458 .define("CMAKE_ASM_COMPILER", sanitize_cc(cc));
461 cfg.build_arg("-j").build_arg(builder.jobs().to_string());
462 let mut cflags = builder.cflags(target, GitRepo::Llvm).join(" ");
463 if let Some(ref s) = builder.config.llvm_cflags {
464 cflags.push_str(&format!(" {}", s));
466 // Some compiler features used by LLVM (such as thread locals) will not work on a min version below iOS 10.
467 if target.contains("apple-ios") {
468 if target.contains("86-") {
469 cflags.push_str(" -miphonesimulator-version-min=10.0");
471 cflags.push_str(" -miphoneos-version-min=10.0");
474 if builder.config.llvm_clang_cl.is_some() {
475 cflags.push_str(&format!(" --target={}", target))
477 cfg.define("CMAKE_C_FLAGS", cflags);
478 let mut cxxflags = builder.cflags(target, GitRepo::Llvm).join(" ");
479 if builder.config.llvm_static_stdcpp && !target.contains("msvc") && !target.contains("netbsd") {
480 cxxflags.push_str(" -static-libstdc++");
482 if let Some(ref s) = builder.config.llvm_cxxflags {
483 cxxflags.push_str(&format!(" {}", s));
485 if builder.config.llvm_clang_cl.is_some() {
486 cxxflags.push_str(&format!(" --target={}", target))
488 cfg.define("CMAKE_CXX_FLAGS", cxxflags);
489 if let Some(ar) = builder.ar(target) {
490 if ar.is_absolute() {
491 // LLVM build breaks if `CMAKE_AR` is a relative path, for some reason it
492 // tries to resolve this path in the LLVM build directory.
493 cfg.define("CMAKE_AR", sanitize_cc(ar));
497 if let Some(ranlib) = builder.ranlib(target) {
498 if ranlib.is_absolute() {
499 // LLVM build breaks if `CMAKE_RANLIB` is a relative path, for some reason it
500 // tries to resolve this path in the LLVM build directory.
501 cfg.define("CMAKE_RANLIB", sanitize_cc(ranlib));
505 if let Some(ref s) = builder.config.llvm_ldflags {
506 cfg.define("CMAKE_SHARED_LINKER_FLAGS", s);
507 cfg.define("CMAKE_MODULE_LINKER_FLAGS", s);
508 cfg.define("CMAKE_EXE_LINKER_FLAGS", s);
511 if env::var_os("SCCACHE_ERROR_LOG").is_some() {
512 cfg.env("RUSTC_LOG", "sccache=warn");
516 #[derive(Debug, Copy, Clone, Hash, PartialEq, Eq)]
518 pub target: TargetSelection,
522 type Output = PathBuf;
523 const ONLY_HOSTS: bool = true;
525 fn should_run(run: ShouldRun<'_>) -> ShouldRun<'_> {
526 run.path("src/llvm-project/lld").path("src/tools/lld")
529 fn make_run(run: RunConfig<'_>) {
530 run.builder.ensure(Lld { target: run.target });
533 /// Compile LLD for `target`.
534 fn run(self, builder: &Builder<'_>) -> PathBuf {
535 if builder.config.dry_run {
536 return PathBuf::from("lld-out-dir-test-gen");
538 let target = self.target;
540 let llvm_config = builder.ensure(Llvm { target: self.target });
542 let out_dir = builder.lld_out(target);
543 let done_stamp = out_dir.join("lld-finished-building");
544 if done_stamp.exists() {
548 builder.info(&format!("Building LLD for {}", target));
549 let _time = util::timeit(&builder);
550 t!(fs::create_dir_all(&out_dir));
552 let mut cfg = cmake::Config::new(builder.src.join("src/llvm-project/lld"));
553 configure_cmake(builder, target, &mut cfg, true);
555 // This is an awful, awful hack. Discovered when we migrated to using
556 // clang-cl to compile LLVM/LLD it turns out that LLD, when built out of
557 // tree, will execute `llvm-config --cmakedir` and then tell CMake about
558 // that directory for later processing. Unfortunately if this path has
559 // forward slashes in it (which it basically always does on Windows)
560 // then CMake will hit a syntax error later on as... something isn't
563 // Instead of attempting to fix this problem in upstream CMake and/or
564 // LLVM/LLD we just hack around it here. This thin wrapper will take the
565 // output from llvm-config and replace all instances of `\` with `/` to
566 // ensure we don't hit the same bugs with escaping. It means that you
567 // can't build on a system where your paths require `\` on Windows, but
568 // there's probably a lot of reasons you can't do that other than this.
569 let llvm_config_shim = env::current_exe().unwrap().with_file_name("llvm-config-wrapper");
571 cfg.out_dir(&out_dir)
573 .env("LLVM_CONFIG_REAL", &llvm_config)
574 .define("LLVM_CONFIG_PATH", llvm_config_shim)
575 .define("LLVM_INCLUDE_TESTS", "OFF");
577 // While we're using this horrible workaround to shim the execution of
578 // llvm-config, let's just pile on more. I can't seem to figure out how
579 // to build LLD as a standalone project and also cross-compile it at the
580 // same time. It wants a natively executable `llvm-config` to learn
581 // about LLVM, but then it learns about all the host configuration of
582 // LLVM and tries to link to host LLVM libraries.
584 // To work around that we tell our shim to replace anything with the
585 // build target with the actual target instead. This'll break parts of
586 // LLD though which try to execute host tools, such as llvm-tblgen, so
587 // we specifically tell it where to find those. This is likely super
588 // brittle and will break over time. If anyone knows better how to
589 // cross-compile LLD it would be much appreciated to fix this!
590 if target != builder.config.build {
591 cfg.env("LLVM_CONFIG_SHIM_REPLACE", &builder.config.build.triple)
592 .env("LLVM_CONFIG_SHIM_REPLACE_WITH", &target.triple)
595 llvm_config.with_file_name("llvm-tblgen").with_extension(EXE_EXTENSION),
599 // Explicitly set C++ standard, because upstream doesn't do so
600 // for standalone builds.
601 cfg.define("CMAKE_CXX_STANDARD", "14");
605 t!(File::create(&done_stamp));
610 #[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
611 pub struct TestHelpers {
612 pub target: TargetSelection,
615 impl Step for TestHelpers {
618 fn should_run(run: ShouldRun<'_>) -> ShouldRun<'_> {
619 run.path("src/test/auxiliary/rust_test_helpers.c")
622 fn make_run(run: RunConfig<'_>) {
623 run.builder.ensure(TestHelpers { target: run.target })
626 /// Compiles the `rust_test_helpers.c` library which we used in various
627 /// `run-pass` tests for ABI testing.
628 fn run(self, builder: &Builder<'_>) {
629 if builder.config.dry_run {
632 let target = self.target;
633 let dst = builder.test_helpers_out(target);
634 let src = builder.src.join("src/test/auxiliary/rust_test_helpers.c");
635 if up_to_date(&src, &dst.join("librust_test_helpers.a")) {
639 builder.info("Building test helpers");
640 t!(fs::create_dir_all(&dst));
641 let mut cfg = cc::Build::new();
642 // FIXME: Workaround for https://github.com/emscripten-core/emscripten/issues/9013
643 if target.contains("emscripten") {
647 // We may have found various cross-compilers a little differently due to our
648 // extra configuration, so inform cc of these compilers. Note, though, that
649 // on MSVC we still need cc's detection of env vars (ugh).
650 if !target.contains("msvc") {
651 if let Some(ar) = builder.ar(target) {
654 cfg.compiler(builder.cc(target));
657 cfg.cargo_metadata(false)
659 .target(&target.triple)
660 .host(&builder.config.build.triple)
664 .file(builder.src.join("src/test/auxiliary/rust_test_helpers.c"))
665 .compile("rust_test_helpers");
669 #[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
670 pub struct Sanitizers {
671 pub target: TargetSelection,
674 impl Step for Sanitizers {
675 type Output = Vec<SanitizerRuntime>;
677 fn should_run(run: ShouldRun<'_>) -> ShouldRun<'_> {
678 run.path("src/llvm-project/compiler-rt").path("src/sanitizers")
681 fn make_run(run: RunConfig<'_>) {
682 run.builder.ensure(Sanitizers { target: run.target });
685 /// Builds sanitizer runtime libraries.
686 fn run(self, builder: &Builder<'_>) -> Self::Output {
687 let compiler_rt_dir = builder.src.join("src/llvm-project/compiler-rt");
688 if !compiler_rt_dir.exists() {
692 let out_dir = builder.native_dir(self.target).join("sanitizers");
693 let runtimes = supported_sanitizers(&out_dir, self.target, &builder.config.channel);
694 if runtimes.is_empty() {
698 let llvm_config = builder.ensure(Llvm { target: builder.config.build });
699 if builder.config.dry_run {
703 let stamp = out_dir.join("sanitizers-finished-building");
704 let stamp = HashStamp::new(stamp, builder.in_tree_llvm_info.sha());
707 if stamp.hash.is_none() {
708 builder.info(&format!(
709 "Rebuild sanitizers by removing the file `{}`",
716 builder.info(&format!("Building sanitizers for {}", self.target));
718 let _time = util::timeit(&builder);
720 let mut cfg = cmake::Config::new(&compiler_rt_dir);
721 cfg.profile("Release");
722 cfg.define("CMAKE_C_COMPILER_TARGET", self.target.triple);
723 cfg.define("COMPILER_RT_BUILD_BUILTINS", "OFF");
724 cfg.define("COMPILER_RT_BUILD_CRT", "OFF");
725 cfg.define("COMPILER_RT_BUILD_LIBFUZZER", "OFF");
726 cfg.define("COMPILER_RT_BUILD_PROFILE", "OFF");
727 cfg.define("COMPILER_RT_BUILD_SANITIZERS", "ON");
728 cfg.define("COMPILER_RT_BUILD_XRAY", "OFF");
729 cfg.define("COMPILER_RT_DEFAULT_TARGET_ONLY", "ON");
730 cfg.define("COMPILER_RT_USE_LIBCXX", "OFF");
731 cfg.define("LLVM_CONFIG_PATH", &llvm_config);
733 // On Darwin targets the sanitizer runtimes are build as universal binaries.
734 // Unfortunately sccache currently lacks support to build them successfully.
735 // Disable compiler launcher on Darwin targets to avoid potential issues.
736 let use_compiler_launcher = !self.target.contains("apple-darwin");
737 configure_cmake(builder, self.target, &mut cfg, use_compiler_launcher);
739 t!(fs::create_dir_all(&out_dir));
740 cfg.out_dir(out_dir);
742 for runtime in &runtimes {
743 cfg.build_target(&runtime.cmake_target);
752 #[derive(Clone, Debug)]
753 pub struct SanitizerRuntime {
754 /// CMake target used to build the runtime.
755 pub cmake_target: String,
756 /// Path to the built runtime library.
758 /// Library filename that will be used rustc.
762 /// Returns sanitizers available on a given target.
763 fn supported_sanitizers(
765 target: TargetSelection,
767 ) -> Vec<SanitizerRuntime> {
768 let darwin_libs = |os: &str, components: &[&str]| -> Vec<SanitizerRuntime> {
771 .map(move |c| SanitizerRuntime {
772 cmake_target: format!("clang_rt.{}_{}_dynamic", c, os),
774 .join(&format!("build/lib/darwin/libclang_rt.{}_{}_dynamic.dylib", c, os)),
775 name: format!("librustc-{}_rt.{}.dylib", channel, c),
780 let common_libs = |os: &str, arch: &str, components: &[&str]| -> Vec<SanitizerRuntime> {
783 .map(move |c| SanitizerRuntime {
784 cmake_target: format!("clang_rt.{}-{}", c, arch),
785 path: out_dir.join(&format!("build/lib/{}/libclang_rt.{}-{}.a", os, c, arch)),
786 name: format!("librustc-{}_rt.{}.a", channel, c),
791 match &*target.triple {
792 "aarch64-fuchsia" => common_libs("fuchsia", "aarch64", &["asan"]),
793 "aarch64-unknown-linux-gnu" => {
794 common_libs("linux", "aarch64", &["asan", "lsan", "msan", "tsan"])
796 "x86_64-apple-darwin" => darwin_libs("osx", &["asan", "lsan", "tsan"]),
797 "x86_64-fuchsia" => common_libs("fuchsia", "x86_64", &["asan"]),
798 "x86_64-unknown-freebsd" => common_libs("freebsd", "x86_64", &["asan", "msan", "tsan"]),
799 "x86_64-unknown-linux-gnu" => {
800 common_libs("linux", "x86_64", &["asan", "lsan", "msan", "tsan"])
808 hash: Option<Vec<u8>>,
812 fn new(path: PathBuf, hash: Option<&str>) -> Self {
813 HashStamp { path, hash: hash.map(|s| s.as_bytes().to_owned()) }
816 fn is_done(&self) -> bool {
817 match fs::read(&self.path) {
818 Ok(h) => self.hash.as_deref().unwrap_or(b"") == h.as_slice(),
819 Err(e) if e.kind() == io::ErrorKind::NotFound => false,
821 panic!("failed to read stamp file `{}`: {}", self.path.display(), e);
826 fn remove(&self) -> io::Result<()> {
827 match fs::remove_file(&self.path) {
830 if e.kind() == io::ErrorKind::NotFound {
839 fn write(&self) -> io::Result<()> {
840 fs::write(&self.path, self.hash.as_deref().unwrap_or(b""))