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};
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 #[derive(Debug, Copy, Clone, Hash, PartialEq, Eq)]
96 pub target: TargetSelection,
100 type Output = PathBuf; // path to llvm-config
102 const ONLY_HOSTS: bool = true;
104 fn should_run(run: ShouldRun<'_>) -> ShouldRun<'_> {
105 run.path("src/llvm-project").path("src/llvm-project/llvm").path("src/llvm")
108 fn make_run(run: RunConfig<'_>) {
109 run.builder.ensure(Llvm { target: run.target });
112 /// Compile LLVM for `target`.
113 fn run(self, builder: &Builder<'_>) -> PathBuf {
114 let target = self.target;
115 let target_native = if self.target.starts_with("riscv") {
116 // RISC-V target triples in Rust is not named the same as C compiler target triples.
117 // This converts Rust RISC-V target triples to C compiler triples.
118 let idx = target.triple.find('-').unwrap();
120 format!("riscv{}{}", &target.triple[5..7], &target.triple[idx..])
125 let Meta { stamp, build_llvm_config, out_dir, root } =
126 match prebuilt_llvm_config(builder, target) {
131 if builder.config.llvm_link_shared
132 && (target.contains("windows") || target.contains("apple-darwin"))
134 panic!("shared linking to LLVM is not currently supported on {}", target.triple);
137 builder.info(&format!("Building LLVM for {}", target));
139 let _time = util::timeit(&builder);
140 t!(fs::create_dir_all(&out_dir));
142 // http://llvm.org/docs/CMake.html
143 let mut cfg = cmake::Config::new(builder.src.join(root));
145 let profile = match (builder.config.llvm_optimize, builder.config.llvm_release_debuginfo) {
146 (false, _) => "Debug",
147 (true, false) => "Release",
148 (true, true) => "RelWithDebInfo",
151 // NOTE: remember to also update `config.toml.example` when changing the
153 let llvm_targets = match &builder.config.llvm_targets {
156 "AArch64;ARM;Hexagon;MSP430;Mips;NVPTX;PowerPC;RISCV;\
157 Sparc;SystemZ;WebAssembly;X86"
161 let llvm_exp_targets = match builder.config.llvm_experimental_targets {
166 let assertions = if builder.config.llvm_assertions { "ON" } else { "OFF" };
168 cfg.out_dir(&out_dir)
170 .define("LLVM_ENABLE_ASSERTIONS", assertions)
171 .define("LLVM_TARGETS_TO_BUILD", llvm_targets)
172 .define("LLVM_EXPERIMENTAL_TARGETS_TO_BUILD", llvm_exp_targets)
173 .define("LLVM_INCLUDE_EXAMPLES", "OFF")
174 .define("LLVM_INCLUDE_TESTS", "OFF")
175 .define("LLVM_INCLUDE_DOCS", "OFF")
176 .define("LLVM_INCLUDE_BENCHMARKS", "OFF")
177 .define("LLVM_ENABLE_TERMINFO", "OFF")
178 .define("LLVM_ENABLE_LIBEDIT", "OFF")
179 .define("LLVM_ENABLE_BINDINGS", "OFF")
180 .define("LLVM_ENABLE_Z3_SOLVER", "OFF")
181 .define("LLVM_PARALLEL_COMPILE_JOBS", builder.jobs().to_string())
182 .define("LLVM_TARGET_ARCH", target_native.split('-').next().unwrap())
183 .define("LLVM_DEFAULT_TARGET_TRIPLE", target_native);
185 if target != "aarch64-apple-darwin" {
186 cfg.define("LLVM_ENABLE_ZLIB", "ON");
188 cfg.define("LLVM_ENABLE_ZLIB", "OFF");
191 // Are we compiling for iOS/tvOS?
192 if target.contains("apple-ios") || target.contains("apple-tvos") {
193 // These two defines prevent CMake from automatically trying to add a MacOSX sysroot, which leads to a compiler error.
194 cfg.define("CMAKE_OSX_SYSROOT", "/");
195 cfg.define("CMAKE_OSX_DEPLOYMENT_TARGET", "");
196 // Prevent cmake from adding -bundle to CFLAGS automatically, which leads to a compiler error because "-bitcode_bundle" also gets added.
197 cfg.define("LLVM_ENABLE_PLUGINS", "OFF");
198 // Zlib fails to link properly, leading to a compiler error.
199 cfg.define("LLVM_ENABLE_ZLIB", "OFF");
202 if builder.config.llvm_thin_lto {
203 cfg.define("LLVM_ENABLE_LTO", "Thin");
204 if !target.contains("apple") {
205 cfg.define("LLVM_ENABLE_LLD", "ON");
209 // This setting makes the LLVM tools link to the dynamic LLVM library,
210 // which saves both memory during parallel links and overall disk space
211 // for the tools. We don't do this on every platform as it doesn't work
212 // equally well everywhere.
214 // If we're not linking rustc to a dynamic LLVM, though, then don't link
216 if builder.llvm_link_tools_dynamically(target) && builder.config.llvm_link_shared {
217 cfg.define("LLVM_LINK_LLVM_DYLIB", "ON");
220 // For distribution we want the LLVM tools to be *statically* linked to libstdc++
221 if builder.config.llvm_tools_enabled {
222 if !target.contains("msvc") {
223 if target.contains("apple") {
224 cfg.define("CMAKE_EXE_LINKER_FLAGS", "-static-libstdc++");
226 cfg.define("CMAKE_EXE_LINKER_FLAGS", "-Wl,-Bsymbolic -static-libstdc++");
231 if target.starts_with("riscv") {
232 // In RISC-V, using C++ atomics require linking to `libatomic` but the LLVM build
233 // system check cannot detect this. Therefore it is set manually here.
234 if !builder.config.llvm_tools_enabled {
235 cfg.define("CMAKE_EXE_LINKER_FLAGS", "-latomic");
237 cfg.define("CMAKE_EXE_LINKER_FLAGS", "-latomic -static-libstdc++");
239 cfg.define("CMAKE_SHARED_LINKER_FLAGS", "-latomic");
242 if target.contains("msvc") {
243 cfg.define("LLVM_USE_CRT_DEBUG", "MT");
244 cfg.define("LLVM_USE_CRT_RELEASE", "MT");
245 cfg.define("LLVM_USE_CRT_RELWITHDEBINFO", "MT");
246 cfg.static_crt(true);
249 if target.starts_with("i686") {
250 cfg.define("LLVM_BUILD_32_BITS", "ON");
253 let mut enabled_llvm_projects = Vec::new();
255 if util::forcing_clang_based_tests() {
256 enabled_llvm_projects.push("clang");
257 enabled_llvm_projects.push("compiler-rt");
260 // We want libxml to be disabled.
261 // See https://github.com/rust-lang/rust/pull/50104
262 cfg.define("LLVM_ENABLE_LIBXML2", "OFF");
264 if !enabled_llvm_projects.is_empty() {
265 enabled_llvm_projects.sort();
266 enabled_llvm_projects.dedup();
267 cfg.define("LLVM_ENABLE_PROJECTS", enabled_llvm_projects.join(";"));
270 if let Some(num_linkers) = builder.config.llvm_link_jobs {
272 cfg.define("LLVM_PARALLEL_LINK_JOBS", num_linkers.to_string());
276 // http://llvm.org/docs/HowToCrossCompileLLVM.html
277 if target != builder.config.build {
278 builder.ensure(Llvm { target: builder.config.build });
279 // FIXME: if the llvm root for the build triple is overridden then we
280 // should use llvm-tblgen from there, also should verify that it
281 // actually exists most of the time in normal installs of LLVM.
282 let host_bin = builder.llvm_out(builder.config.build).join("bin");
283 cfg.define("CMAKE_CROSSCOMPILING", "True");
284 cfg.define("LLVM_TABLEGEN", host_bin.join("llvm-tblgen").with_extension(EXE_EXTENSION));
285 cfg.define("LLVM_NM", host_bin.join("llvm-nm").with_extension(EXE_EXTENSION));
288 host_bin.join("llvm-config").with_extension(EXE_EXTENSION),
292 if let Some(ref suffix) = builder.config.llvm_version_suffix {
293 // Allow version-suffix="" to not define a version suffix at all.
294 if !suffix.is_empty() {
295 cfg.define("LLVM_VERSION_SUFFIX", suffix);
297 } else if builder.config.channel == "dev" {
298 // Changes to a version suffix require a complete rebuild of the LLVM.
299 // To avoid rebuilds during a time of version bump, don't include rustc
300 // release number on the dev channel.
301 cfg.define("LLVM_VERSION_SUFFIX", "-rust-dev");
303 let suffix = format!("-rust-{}-{}", builder.version, builder.config.channel);
304 cfg.define("LLVM_VERSION_SUFFIX", suffix);
307 if let Some(ref linker) = builder.config.llvm_use_linker {
308 cfg.define("LLVM_USE_LINKER", linker);
311 if let Some(true) = builder.config.llvm_allow_old_toolchain {
312 cfg.define("LLVM_TEMPORARILY_ALLOW_OLD_TOOLCHAIN", "YES");
315 configure_cmake(builder, target, &mut cfg, true);
317 // FIXME: we don't actually need to build all LLVM tools and all LLVM
318 // libraries here, e.g., we just want a few components and a few
319 // tools. Figure out how to filter them down and only build the right
320 // tools and libs on all platforms.
322 if builder.config.dry_run {
323 return build_llvm_config;
334 fn check_llvm_version(builder: &Builder<'_>, llvm_config: &Path) {
335 if !builder.config.llvm_version_check {
339 if builder.config.dry_run {
343 let mut cmd = Command::new(llvm_config);
344 let version = output(cmd.arg("--version"));
345 let mut parts = version.split('.').take(2).filter_map(|s| s.parse::<u32>().ok());
346 if let (Some(major), Some(_minor)) = (parts.next(), parts.next()) {
351 panic!("\n\nbad LLVM version: {}, need >=8.0\n\n", version)
355 builder: &Builder<'_>,
356 target: TargetSelection,
357 cfg: &mut cmake::Config,
358 use_compiler_launcher: bool,
360 // Do not print installation messages for up-to-date files.
361 // LLVM and LLD builds can produce a lot of those and hit CI limits on log size.
362 cfg.define("CMAKE_INSTALL_MESSAGE", "LAZY");
364 // Do not allow the user's value of DESTDIR to influence where
365 // LLVM will install itself. LLVM must always be installed in our
366 // own build directories.
367 cfg.env("DESTDIR", "");
370 cfg.generator("Ninja");
372 cfg.target(&target.triple).host(&builder.config.build.triple);
374 if target != builder.config.build {
375 if target.contains("netbsd") {
376 cfg.define("CMAKE_SYSTEM_NAME", "NetBSD");
377 } else if target.contains("freebsd") {
378 cfg.define("CMAKE_SYSTEM_NAME", "FreeBSD");
379 } else if target.contains("windows") {
380 cfg.define("CMAKE_SYSTEM_NAME", "Windows");
382 // When cross-compiling we should also set CMAKE_SYSTEM_VERSION, but in
383 // that case like CMake we cannot easily determine system version either.
385 // Since, the LLVM itself makes rather limited use of version checks in
386 // CMakeFiles (and then only in tests), and so far no issues have been
387 // reported, the system version is currently left unset.
390 let sanitize_cc = |cc: &Path| {
391 if target.contains("msvc") {
392 OsString::from(cc.to_str().unwrap().replace("\\", "/"))
394 cc.as_os_str().to_owned()
398 // MSVC with CMake uses msbuild by default which doesn't respect these
399 // vars that we'd otherwise configure. In that case we just skip this
401 if target.contains("msvc") && !builder.ninja() {
405 let (cc, cxx) = match builder.config.llvm_clang_cl {
406 Some(ref cl) => (cl.as_ref(), cl.as_ref()),
407 None => (builder.cc(target), builder.cxx(target).unwrap()),
410 // Handle msvc + ninja + ccache specially (this is what the bots use)
411 if target.contains("msvc") && builder.ninja() && builder.config.ccache.is_some() {
412 let mut wrap_cc = env::current_exe().expect("failed to get cwd");
413 wrap_cc.set_file_name("sccache-plus-cl.exe");
415 cfg.define("CMAKE_C_COMPILER", sanitize_cc(&wrap_cc))
416 .define("CMAKE_CXX_COMPILER", sanitize_cc(&wrap_cc));
417 cfg.env("SCCACHE_PATH", builder.config.ccache.as_ref().unwrap())
418 .env("SCCACHE_TARGET", target.triple)
419 .env("SCCACHE_CC", &cc)
420 .env("SCCACHE_CXX", &cxx);
422 // Building LLVM on MSVC can be a little ludicrous at times. We're so far
423 // off the beaten path here that I'm not really sure this is even half
424 // supported any more. Here we're trying to:
426 // * Build LLVM on MSVC
427 // * Build LLVM with `clang-cl` instead of `cl.exe`
428 // * Build a project with `sccache`
429 // * Build for 32-bit as well
430 // * Build with Ninja
432 // For `cl.exe` there are different binaries to compile 32/64 bit which
433 // we use but for `clang-cl` there's only one which internally
434 // multiplexes via flags. As a result it appears that CMake's detection
435 // of a compiler's architecture and such on MSVC **doesn't** pass any
436 // custom flags we pass in CMAKE_CXX_FLAGS below. This means that if we
437 // use `clang-cl.exe` it's always diagnosed as a 64-bit compiler which
438 // definitely causes problems since all the env vars are pointing to
441 // To hack around this... again... we pass an argument that's
442 // unconditionally passed in the sccache shim. This'll get CMake to
443 // correctly diagnose it's doing a 32-bit compilation and LLVM will
444 // internally configure itself appropriately.
445 if builder.config.llvm_clang_cl.is_some() && target.contains("i686") {
446 cfg.env("SCCACHE_EXTRA_ARGS", "-m32");
449 // If ccache is configured we inform the build a little differently how
450 // to invoke ccache while also invoking our compilers.
451 if use_compiler_launcher {
452 if let Some(ref ccache) = builder.config.ccache {
453 cfg.define("CMAKE_C_COMPILER_LAUNCHER", ccache)
454 .define("CMAKE_CXX_COMPILER_LAUNCHER", ccache);
457 cfg.define("CMAKE_C_COMPILER", sanitize_cc(cc))
458 .define("CMAKE_CXX_COMPILER", sanitize_cc(cxx))
459 .define("CMAKE_ASM_COMPILER", sanitize_cc(cc));
462 cfg.build_arg("-j").build_arg(builder.jobs().to_string());
463 let mut cflags = builder.cflags(target, GitRepo::Llvm).join(" ");
464 if let Some(ref s) = builder.config.llvm_cflags {
465 cflags.push_str(&format!(" {}", s));
467 // Some compiler features used by LLVM (such as thread locals) will not work on a min version below iOS 10.
468 if target.contains("apple-ios") {
469 if target.contains("86-") {
470 cflags.push_str(" -miphonesimulator-version-min=10.0");
472 cflags.push_str(" -miphoneos-version-min=10.0");
475 if builder.config.llvm_clang_cl.is_some() {
476 cflags.push_str(&format!(" --target={}", target))
478 cfg.define("CMAKE_C_FLAGS", cflags);
479 let mut cxxflags = builder.cflags(target, GitRepo::Llvm).join(" ");
480 if builder.config.llvm_static_stdcpp && !target.contains("msvc") && !target.contains("netbsd") {
481 cxxflags.push_str(" -static-libstdc++");
483 if let Some(ref s) = builder.config.llvm_cxxflags {
484 cxxflags.push_str(&format!(" {}", s));
486 if builder.config.llvm_clang_cl.is_some() {
487 cxxflags.push_str(&format!(" --target={}", target))
489 cfg.define("CMAKE_CXX_FLAGS", cxxflags);
490 if let Some(ar) = builder.ar(target) {
491 if ar.is_absolute() {
492 // LLVM build breaks if `CMAKE_AR` is a relative path, for some reason it
493 // tries to resolve this path in the LLVM build directory.
494 cfg.define("CMAKE_AR", sanitize_cc(ar));
498 if let Some(ranlib) = builder.ranlib(target) {
499 if ranlib.is_absolute() {
500 // LLVM build breaks if `CMAKE_RANLIB` is a relative path, for some reason it
501 // tries to resolve this path in the LLVM build directory.
502 cfg.define("CMAKE_RANLIB", sanitize_cc(ranlib));
506 if let Some(ref s) = builder.config.llvm_ldflags {
507 cfg.define("CMAKE_SHARED_LINKER_FLAGS", s);
508 cfg.define("CMAKE_MODULE_LINKER_FLAGS", s);
509 cfg.define("CMAKE_EXE_LINKER_FLAGS", s);
512 if env::var_os("SCCACHE_ERROR_LOG").is_some() {
513 cfg.env("RUSTC_LOG", "sccache=warn");
517 #[derive(Debug, Copy, Clone, Hash, PartialEq, Eq)]
519 pub target: TargetSelection,
523 type Output = PathBuf;
524 const ONLY_HOSTS: bool = true;
526 fn should_run(run: ShouldRun<'_>) -> ShouldRun<'_> {
527 run.path("src/llvm-project/lld").path("src/tools/lld")
530 fn make_run(run: RunConfig<'_>) {
531 run.builder.ensure(Lld { target: run.target });
534 /// Compile LLD for `target`.
535 fn run(self, builder: &Builder<'_>) -> PathBuf {
536 if builder.config.dry_run {
537 return PathBuf::from("lld-out-dir-test-gen");
539 let target = self.target;
541 let llvm_config = builder.ensure(Llvm { target: self.target });
543 let out_dir = builder.lld_out(target);
544 let done_stamp = out_dir.join("lld-finished-building");
545 if done_stamp.exists() {
549 builder.info(&format!("Building LLD for {}", target));
550 let _time = util::timeit(&builder);
551 t!(fs::create_dir_all(&out_dir));
553 let mut cfg = cmake::Config::new(builder.src.join("src/llvm-project/lld"));
554 configure_cmake(builder, target, &mut cfg, true);
556 // This is an awful, awful hack. Discovered when we migrated to using
557 // clang-cl to compile LLVM/LLD it turns out that LLD, when built out of
558 // tree, will execute `llvm-config --cmakedir` and then tell CMake about
559 // that directory for later processing. Unfortunately if this path has
560 // forward slashes in it (which it basically always does on Windows)
561 // then CMake will hit a syntax error later on as... something isn't
564 // Instead of attempting to fix this problem in upstream CMake and/or
565 // LLVM/LLD we just hack around it here. This thin wrapper will take the
566 // output from llvm-config and replace all instances of `\` with `/` to
567 // ensure we don't hit the same bugs with escaping. It means that you
568 // can't build on a system where your paths require `\` on Windows, but
569 // there's probably a lot of reasons you can't do that other than this.
570 let llvm_config_shim = env::current_exe().unwrap().with_file_name("llvm-config-wrapper");
572 cfg.out_dir(&out_dir)
574 .env("LLVM_CONFIG_REAL", &llvm_config)
575 .define("LLVM_CONFIG_PATH", llvm_config_shim)
576 .define("LLVM_INCLUDE_TESTS", "OFF");
578 // While we're using this horrible workaround to shim the execution of
579 // llvm-config, let's just pile on more. I can't seem to figure out how
580 // to build LLD as a standalone project and also cross-compile it at the
581 // same time. It wants a natively executable `llvm-config` to learn
582 // about LLVM, but then it learns about all the host configuration of
583 // LLVM and tries to link to host LLVM libraries.
585 // To work around that we tell our shim to replace anything with the
586 // build target with the actual target instead. This'll break parts of
587 // LLD though which try to execute host tools, such as llvm-tblgen, so
588 // we specifically tell it where to find those. This is likely super
589 // brittle and will break over time. If anyone knows better how to
590 // cross-compile LLD it would be much appreciated to fix this!
591 if target != builder.config.build {
592 cfg.env("LLVM_CONFIG_SHIM_REPLACE", &builder.config.build.triple)
593 .env("LLVM_CONFIG_SHIM_REPLACE_WITH", &target.triple)
596 llvm_config.with_file_name("llvm-tblgen").with_extension(EXE_EXTENSION),
600 // Explicitly set C++ standard, because upstream doesn't do so
601 // for standalone builds.
602 cfg.define("CMAKE_CXX_STANDARD", "14");
606 t!(File::create(&done_stamp));
611 #[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
612 pub struct TestHelpers {
613 pub target: TargetSelection,
616 impl Step for TestHelpers {
619 fn should_run(run: ShouldRun<'_>) -> ShouldRun<'_> {
620 run.path("src/test/auxiliary/rust_test_helpers.c")
623 fn make_run(run: RunConfig<'_>) {
624 run.builder.ensure(TestHelpers { target: run.target })
627 /// Compiles the `rust_test_helpers.c` library which we used in various
628 /// `run-pass` tests for ABI testing.
629 fn run(self, builder: &Builder<'_>) {
630 if builder.config.dry_run {
633 // The x86_64-fortanix-unknown-sgx target doesn't have a working C
634 // toolchain. However, some x86_64 ELF objects can be linked
635 // without issues. Use this hack to compile the test helpers.
636 let target = if self.target == "x86_64-fortanix-unknown-sgx" {
637 TargetSelection::from_user("x86_64-unknown-linux-gnu")
641 let dst = builder.test_helpers_out(target);
642 let src = builder.src.join("src/test/auxiliary/rust_test_helpers.c");
643 if up_to_date(&src, &dst.join("librust_test_helpers.a")) {
647 builder.info("Building test helpers");
648 t!(fs::create_dir_all(&dst));
649 let mut cfg = cc::Build::new();
650 // FIXME: Workaround for https://github.com/emscripten-core/emscripten/issues/9013
651 if target.contains("emscripten") {
655 // We may have found various cross-compilers a little differently due to our
656 // extra configuration, so inform cc of these compilers. Note, though, that
657 // on MSVC we still need cc's detection of env vars (ugh).
658 if !target.contains("msvc") {
659 if let Some(ar) = builder.ar(target) {
662 cfg.compiler(builder.cc(target));
664 cfg.cargo_metadata(false)
666 .target(&target.triple)
667 .host(&builder.config.build.triple)
671 .file(builder.src.join("src/test/auxiliary/rust_test_helpers.c"))
672 .compile("rust_test_helpers");
676 #[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
677 pub struct Sanitizers {
678 pub target: TargetSelection,
681 impl Step for Sanitizers {
682 type Output = Vec<SanitizerRuntime>;
684 fn should_run(run: ShouldRun<'_>) -> ShouldRun<'_> {
685 run.path("src/llvm-project/compiler-rt").path("src/sanitizers")
688 fn make_run(run: RunConfig<'_>) {
689 run.builder.ensure(Sanitizers { target: run.target });
692 /// Builds sanitizer runtime libraries.
693 fn run(self, builder: &Builder<'_>) -> Self::Output {
694 let compiler_rt_dir = builder.src.join("src/llvm-project/compiler-rt");
695 if !compiler_rt_dir.exists() {
699 let out_dir = builder.native_dir(self.target).join("sanitizers");
700 let runtimes = supported_sanitizers(&out_dir, self.target, &builder.config.channel);
701 if runtimes.is_empty() {
705 let llvm_config = builder.ensure(Llvm { target: builder.config.build });
706 if builder.config.dry_run {
710 let stamp = out_dir.join("sanitizers-finished-building");
711 let stamp = HashStamp::new(stamp, builder.in_tree_llvm_info.sha());
714 if stamp.hash.is_none() {
715 builder.info(&format!(
716 "Rebuild sanitizers by removing the file `{}`",
723 builder.info(&format!("Building sanitizers for {}", self.target));
725 let _time = util::timeit(&builder);
727 let mut cfg = cmake::Config::new(&compiler_rt_dir);
728 cfg.profile("Release");
729 cfg.define("CMAKE_C_COMPILER_TARGET", self.target.triple);
730 cfg.define("COMPILER_RT_BUILD_BUILTINS", "OFF");
731 cfg.define("COMPILER_RT_BUILD_CRT", "OFF");
732 cfg.define("COMPILER_RT_BUILD_LIBFUZZER", "OFF");
733 cfg.define("COMPILER_RT_BUILD_PROFILE", "OFF");
734 cfg.define("COMPILER_RT_BUILD_SANITIZERS", "ON");
735 cfg.define("COMPILER_RT_BUILD_XRAY", "OFF");
736 cfg.define("COMPILER_RT_DEFAULT_TARGET_ONLY", "ON");
737 cfg.define("COMPILER_RT_USE_LIBCXX", "OFF");
738 cfg.define("LLVM_CONFIG_PATH", &llvm_config);
740 // On Darwin targets the sanitizer runtimes are build as universal binaries.
741 // Unfortunately sccache currently lacks support to build them successfully.
742 // Disable compiler launcher on Darwin targets to avoid potential issues.
743 let use_compiler_launcher = !self.target.contains("apple-darwin");
744 configure_cmake(builder, self.target, &mut cfg, use_compiler_launcher);
746 t!(fs::create_dir_all(&out_dir));
747 cfg.out_dir(out_dir);
749 for runtime in &runtimes {
750 cfg.build_target(&runtime.cmake_target);
759 #[derive(Clone, Debug)]
760 pub struct SanitizerRuntime {
761 /// CMake target used to build the runtime.
762 pub cmake_target: String,
763 /// Path to the built runtime library.
765 /// Library filename that will be used rustc.
769 /// Returns sanitizers available on a given target.
770 fn supported_sanitizers(
772 target: TargetSelection,
774 ) -> Vec<SanitizerRuntime> {
775 let darwin_libs = |os: &str, components: &[&str]| -> Vec<SanitizerRuntime> {
778 .map(move |c| SanitizerRuntime {
779 cmake_target: format!("clang_rt.{}_{}_dynamic", c, os),
781 .join(&format!("build/lib/darwin/libclang_rt.{}_{}_dynamic.dylib", c, os)),
782 name: format!("librustc-{}_rt.{}.dylib", channel, c),
787 let common_libs = |os: &str, arch: &str, components: &[&str]| -> Vec<SanitizerRuntime> {
790 .map(move |c| SanitizerRuntime {
791 cmake_target: format!("clang_rt.{}-{}", c, arch),
792 path: out_dir.join(&format!("build/lib/{}/libclang_rt.{}-{}.a", os, c, arch)),
793 name: format!("librustc-{}_rt.{}.a", channel, c),
798 match &*target.triple {
799 "aarch64-fuchsia" => common_libs("fuchsia", "aarch64", &["asan"]),
800 "aarch64-unknown-linux-gnu" => {
801 common_libs("linux", "aarch64", &["asan", "lsan", "msan", "tsan"])
803 "x86_64-apple-darwin" => darwin_libs("osx", &["asan", "lsan", "tsan"]),
804 "x86_64-fuchsia" => common_libs("fuchsia", "x86_64", &["asan"]),
805 "x86_64-unknown-freebsd" => common_libs("freebsd", "x86_64", &["asan", "msan", "tsan"]),
806 "x86_64-unknown-linux-gnu" => {
807 common_libs("linux", "x86_64", &["asan", "lsan", "msan", "tsan"])
815 hash: Option<Vec<u8>>,
819 fn new(path: PathBuf, hash: Option<&str>) -> Self {
820 HashStamp { path, hash: hash.map(|s| s.as_bytes().to_owned()) }
823 fn is_done(&self) -> bool {
824 match fs::read(&self.path) {
825 Ok(h) => self.hash.as_deref().unwrap_or(b"") == h.as_slice(),
826 Err(e) if e.kind() == io::ErrorKind::NotFound => false,
828 panic!("failed to read stamp file `{}`: {}", self.path.display(), e);
833 fn remove(&self) -> io::Result<()> {
834 match fs::remove_file(&self.path) {
837 if e.kind() == io::ErrorKind::NotFound {
846 fn write(&self) -> io::Result<()> {
847 fs::write(&self.path, self.hash.as_deref().unwrap_or(b""))