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 // NOTE: The check for the empty directory is here because when running x.py
103 // the first time, the llvm submodule won't be checked out. Check it out
104 // now so we can build it.
105 if !build.in_tree_llvm_info.is_git() && !dir_is_empty(&build.config.src.join(llvm_project)) {
110 let checked_out = if build.config.fast_submodules {
113 .args(&["rev-parse", "HEAD"])
114 .current_dir(build.config.src.join(llvm_project)),
121 let recorded = output(
123 .args(&["ls-tree", "HEAD"])
125 .current_dir(&build.config.src),
128 recorded.split(' ').nth(2).unwrap_or_else(|| panic!("unexpected output `{}`", recorded));
131 if let Some(llvm_hash) = checked_out {
132 if hash == llvm_hash {
133 // already checked out
138 println!("Updating submodule {}", llvm_project.display());
141 .args(&["submodule", "-q", "sync"])
143 .current_dir(&build.config.src),
146 // Try passing `--progress` to start, then run git again without if that fails.
147 let update = |progress: bool| {
148 let mut git = Command::new("git");
149 git.args(&["submodule", "update", "--init", "--recursive"]);
151 git.arg("--progress");
153 git.arg(llvm_project).current_dir(&build.config.src);
156 // NOTE: doesn't use `try_run` because this shouldn't print an error if it fails.
157 if !update(true).status().map_or(false, |status| status.success()) {
158 build.run(&mut update(false));
163 .args(&["reset", "-q", "--hard"])
164 .current_dir(build.config.src.join(llvm_project)),
168 .args(&["clean", "-qdfx"])
169 .current_dir(build.config.src.join(llvm_project)),
173 #[derive(Debug, Copy, Clone, Hash, PartialEq, Eq)]
175 pub target: TargetSelection,
179 type Output = PathBuf; // path to llvm-config
181 const ONLY_HOSTS: bool = true;
183 fn should_run(run: ShouldRun<'_>) -> ShouldRun<'_> {
184 run.path("src/llvm-project").path("src/llvm-project/llvm").path("src/llvm")
187 fn make_run(run: RunConfig<'_>) {
188 run.builder.ensure(Llvm { target: run.target });
191 /// Compile LLVM for `target`.
192 fn run(self, builder: &Builder<'_>) -> PathBuf {
193 let target = self.target;
194 let target_native = if self.target.starts_with("riscv") {
195 // RISC-V target triples in Rust is not named the same as C compiler target triples.
196 // This converts Rust RISC-V target triples to C compiler triples.
197 let idx = target.triple.find('-').unwrap();
199 format!("riscv{}{}", &target.triple[5..7], &target.triple[idx..])
204 let Meta { stamp, build_llvm_config, out_dir, root } =
205 match prebuilt_llvm_config(builder, target) {
210 if !builder.config.dry_run {
211 update_llvm_submodule(builder);
213 if builder.config.llvm_link_shared
214 && (target.contains("windows") || target.contains("apple-darwin"))
216 panic!("shared linking to LLVM is not currently supported on {}", target.triple);
219 builder.info(&format!("Building LLVM for {}", target));
221 let _time = util::timeit(&builder);
222 t!(fs::create_dir_all(&out_dir));
224 // http://llvm.org/docs/CMake.html
225 let mut cfg = cmake::Config::new(builder.src.join(root));
227 let profile = match (builder.config.llvm_optimize, builder.config.llvm_release_debuginfo) {
228 (false, _) => "Debug",
229 (true, false) => "Release",
230 (true, true) => "RelWithDebInfo",
233 // NOTE: remember to also update `config.toml.example` when changing the
235 let llvm_targets = match &builder.config.llvm_targets {
238 "AArch64;ARM;Hexagon;MSP430;Mips;NVPTX;PowerPC;RISCV;\
239 Sparc;SystemZ;WebAssembly;X86"
243 let llvm_exp_targets = match builder.config.llvm_experimental_targets {
248 let assertions = if builder.config.llvm_assertions { "ON" } else { "OFF" };
250 cfg.out_dir(&out_dir)
252 .define("LLVM_ENABLE_ASSERTIONS", assertions)
253 .define("LLVM_TARGETS_TO_BUILD", llvm_targets)
254 .define("LLVM_EXPERIMENTAL_TARGETS_TO_BUILD", llvm_exp_targets)
255 .define("LLVM_INCLUDE_EXAMPLES", "OFF")
256 .define("LLVM_INCLUDE_DOCS", "OFF")
257 .define("LLVM_INCLUDE_BENCHMARKS", "OFF")
258 .define("LLVM_ENABLE_TERMINFO", "OFF")
259 .define("LLVM_ENABLE_LIBEDIT", "OFF")
260 .define("LLVM_ENABLE_BINDINGS", "OFF")
261 .define("LLVM_ENABLE_Z3_SOLVER", "OFF")
262 .define("LLVM_PARALLEL_COMPILE_JOBS", builder.jobs().to_string())
263 .define("LLVM_TARGET_ARCH", target_native.split('-').next().unwrap())
264 .define("LLVM_DEFAULT_TARGET_TRIPLE", target_native);
266 if target != "aarch64-apple-darwin" {
267 cfg.define("LLVM_ENABLE_ZLIB", "ON");
269 cfg.define("LLVM_ENABLE_ZLIB", "OFF");
272 // Are we compiling for iOS/tvOS?
273 if target.contains("apple-ios") || target.contains("apple-tvos") {
274 // These two defines prevent CMake from automatically trying to add a MacOSX sysroot, which leads to a compiler error.
275 cfg.define("CMAKE_OSX_SYSROOT", "/");
276 cfg.define("CMAKE_OSX_DEPLOYMENT_TARGET", "");
277 // Prevent cmake from adding -bundle to CFLAGS automatically, which leads to a compiler error because "-bitcode_bundle" also gets added.
278 cfg.define("LLVM_ENABLE_PLUGINS", "OFF");
279 // Zlib fails to link properly, leading to a compiler error.
280 cfg.define("LLVM_ENABLE_ZLIB", "OFF");
283 if builder.config.llvm_thin_lto {
284 cfg.define("LLVM_ENABLE_LTO", "Thin");
285 if !target.contains("apple") {
286 cfg.define("LLVM_ENABLE_LLD", "ON");
290 // This setting makes the LLVM tools link to the dynamic LLVM library,
291 // which saves both memory during parallel links and overall disk space
292 // for the tools. We don't do this on every platform as it doesn't work
293 // equally well everywhere.
295 // If we're not linking rustc to a dynamic LLVM, though, then don't link
297 if builder.llvm_link_tools_dynamically(target) && builder.config.llvm_link_shared {
298 cfg.define("LLVM_LINK_LLVM_DYLIB", "ON");
301 // For distribution we want the LLVM tools to be *statically* linked to libstdc++
302 if builder.config.llvm_tools_enabled {
303 if !target.contains("msvc") {
304 if target.contains("apple") {
305 cfg.define("CMAKE_EXE_LINKER_FLAGS", "-static-libstdc++");
307 cfg.define("CMAKE_EXE_LINKER_FLAGS", "-Wl,-Bsymbolic -static-libstdc++");
312 if target.starts_with("riscv") {
313 // In RISC-V, using C++ atomics require linking to `libatomic` but the LLVM build
314 // system check cannot detect this. Therefore it is set manually here.
315 if !builder.config.llvm_tools_enabled {
316 cfg.define("CMAKE_EXE_LINKER_FLAGS", "-latomic");
318 cfg.define("CMAKE_EXE_LINKER_FLAGS", "-latomic -static-libstdc++");
320 cfg.define("CMAKE_SHARED_LINKER_FLAGS", "-latomic");
323 if target.contains("msvc") {
324 cfg.define("LLVM_USE_CRT_DEBUG", "MT");
325 cfg.define("LLVM_USE_CRT_RELEASE", "MT");
326 cfg.define("LLVM_USE_CRT_RELWITHDEBINFO", "MT");
327 cfg.static_crt(true);
330 if target.starts_with("i686") {
331 cfg.define("LLVM_BUILD_32_BITS", "ON");
334 let mut enabled_llvm_projects = Vec::new();
336 if util::forcing_clang_based_tests() {
337 enabled_llvm_projects.push("clang");
338 enabled_llvm_projects.push("compiler-rt");
341 if builder.config.llvm_polly {
342 enabled_llvm_projects.push("polly");
345 // We want libxml to be disabled.
346 // See https://github.com/rust-lang/rust/pull/50104
347 cfg.define("LLVM_ENABLE_LIBXML2", "OFF");
349 if !enabled_llvm_projects.is_empty() {
350 enabled_llvm_projects.sort();
351 enabled_llvm_projects.dedup();
352 cfg.define("LLVM_ENABLE_PROJECTS", enabled_llvm_projects.join(";"));
355 if let Some(num_linkers) = builder.config.llvm_link_jobs {
357 cfg.define("LLVM_PARALLEL_LINK_JOBS", num_linkers.to_string());
361 // http://llvm.org/docs/HowToCrossCompileLLVM.html
362 if target != builder.config.build {
363 builder.ensure(Llvm { target: builder.config.build });
364 // FIXME: if the llvm root for the build triple is overridden then we
365 // should use llvm-tblgen from there, also should verify that it
366 // actually exists most of the time in normal installs of LLVM.
367 let host_bin = builder.llvm_out(builder.config.build).join("bin");
368 cfg.define("CMAKE_CROSSCOMPILING", "True");
369 cfg.define("LLVM_TABLEGEN", host_bin.join("llvm-tblgen").with_extension(EXE_EXTENSION));
370 cfg.define("LLVM_NM", host_bin.join("llvm-nm").with_extension(EXE_EXTENSION));
373 host_bin.join("llvm-config").with_extension(EXE_EXTENSION),
377 if let Some(ref suffix) = builder.config.llvm_version_suffix {
378 // Allow version-suffix="" to not define a version suffix at all.
379 if !suffix.is_empty() {
380 cfg.define("LLVM_VERSION_SUFFIX", suffix);
382 } else if builder.config.channel == "dev" {
383 // Changes to a version suffix require a complete rebuild of the LLVM.
384 // To avoid rebuilds during a time of version bump, don't include rustc
385 // release number on the dev channel.
386 cfg.define("LLVM_VERSION_SUFFIX", "-rust-dev");
388 let suffix = format!("-rust-{}-{}", builder.version, builder.config.channel);
389 cfg.define("LLVM_VERSION_SUFFIX", suffix);
392 if let Some(ref linker) = builder.config.llvm_use_linker {
393 cfg.define("LLVM_USE_LINKER", linker);
396 if builder.config.llvm_allow_old_toolchain {
397 cfg.define("LLVM_TEMPORARILY_ALLOW_OLD_TOOLCHAIN", "YES");
400 configure_cmake(builder, target, &mut cfg, true);
402 // FIXME: we don't actually need to build all LLVM tools and all LLVM
403 // libraries here, e.g., we just want a few components and a few
404 // tools. Figure out how to filter them down and only build the right
405 // tools and libs on all platforms.
407 if builder.config.dry_run {
408 return build_llvm_config;
419 fn check_llvm_version(builder: &Builder<'_>, llvm_config: &Path) {
420 if !builder.config.llvm_version_check {
424 if builder.config.dry_run {
428 let mut cmd = Command::new(llvm_config);
429 let version = output(cmd.arg("--version"));
430 let mut parts = version.split('.').take(2).filter_map(|s| s.parse::<u32>().ok());
431 if let (Some(major), Some(_minor)) = (parts.next(), parts.next()) {
436 panic!("\n\nbad LLVM version: {}, need >=10.0\n\n", version)
440 builder: &Builder<'_>,
441 target: TargetSelection,
442 cfg: &mut cmake::Config,
443 use_compiler_launcher: bool,
445 // Do not print installation messages for up-to-date files.
446 // LLVM and LLD builds can produce a lot of those and hit CI limits on log size.
447 cfg.define("CMAKE_INSTALL_MESSAGE", "LAZY");
449 // Do not allow the user's value of DESTDIR to influence where
450 // LLVM will install itself. LLVM must always be installed in our
451 // own build directories.
452 cfg.env("DESTDIR", "");
455 cfg.generator("Ninja");
457 cfg.target(&target.triple).host(&builder.config.build.triple);
459 if target != builder.config.build {
460 if target.contains("netbsd") {
461 cfg.define("CMAKE_SYSTEM_NAME", "NetBSD");
462 } else if target.contains("freebsd") {
463 cfg.define("CMAKE_SYSTEM_NAME", "FreeBSD");
464 } else if target.contains("windows") {
465 cfg.define("CMAKE_SYSTEM_NAME", "Windows");
466 } else if target.contains("haiku") {
467 cfg.define("CMAKE_SYSTEM_NAME", "Haiku");
468 } else if target.contains("solaris") || target.contains("illumos") {
469 cfg.define("CMAKE_SYSTEM_NAME", "SunOS");
471 // When cross-compiling we should also set CMAKE_SYSTEM_VERSION, but in
472 // that case like CMake we cannot easily determine system version either.
474 // Since, the LLVM itself makes rather limited use of version checks in
475 // CMakeFiles (and then only in tests), and so far no issues have been
476 // reported, the system version is currently left unset.
479 let sanitize_cc = |cc: &Path| {
480 if target.contains("msvc") {
481 OsString::from(cc.to_str().unwrap().replace("\\", "/"))
483 cc.as_os_str().to_owned()
487 // MSVC with CMake uses msbuild by default which doesn't respect these
488 // vars that we'd otherwise configure. In that case we just skip this
490 if target.contains("msvc") && !builder.ninja() {
494 let (cc, cxx) = match builder.config.llvm_clang_cl {
495 Some(ref cl) => (cl.as_ref(), cl.as_ref()),
496 None => (builder.cc(target), builder.cxx(target).unwrap()),
499 // Handle msvc + ninja + ccache specially (this is what the bots use)
500 if target.contains("msvc") && builder.ninja() && builder.config.ccache.is_some() {
501 let mut wrap_cc = env::current_exe().expect("failed to get cwd");
502 wrap_cc.set_file_name("sccache-plus-cl.exe");
504 cfg.define("CMAKE_C_COMPILER", sanitize_cc(&wrap_cc))
505 .define("CMAKE_CXX_COMPILER", sanitize_cc(&wrap_cc));
506 cfg.env("SCCACHE_PATH", builder.config.ccache.as_ref().unwrap())
507 .env("SCCACHE_TARGET", target.triple)
508 .env("SCCACHE_CC", &cc)
509 .env("SCCACHE_CXX", &cxx);
511 // Building LLVM on MSVC can be a little ludicrous at times. We're so far
512 // off the beaten path here that I'm not really sure this is even half
513 // supported any more. Here we're trying to:
515 // * Build LLVM on MSVC
516 // * Build LLVM with `clang-cl` instead of `cl.exe`
517 // * Build a project with `sccache`
518 // * Build for 32-bit as well
519 // * Build with Ninja
521 // For `cl.exe` there are different binaries to compile 32/64 bit which
522 // we use but for `clang-cl` there's only one which internally
523 // multiplexes via flags. As a result it appears that CMake's detection
524 // of a compiler's architecture and such on MSVC **doesn't** pass any
525 // custom flags we pass in CMAKE_CXX_FLAGS below. This means that if we
526 // use `clang-cl.exe` it's always diagnosed as a 64-bit compiler which
527 // definitely causes problems since all the env vars are pointing to
530 // To hack around this... again... we pass an argument that's
531 // unconditionally passed in the sccache shim. This'll get CMake to
532 // correctly diagnose it's doing a 32-bit compilation and LLVM will
533 // internally configure itself appropriately.
534 if builder.config.llvm_clang_cl.is_some() && target.contains("i686") {
535 cfg.env("SCCACHE_EXTRA_ARGS", "-m32");
538 // If ccache is configured we inform the build a little differently how
539 // to invoke ccache while also invoking our compilers.
540 if use_compiler_launcher {
541 if let Some(ref ccache) = builder.config.ccache {
542 cfg.define("CMAKE_C_COMPILER_LAUNCHER", ccache)
543 .define("CMAKE_CXX_COMPILER_LAUNCHER", ccache);
546 cfg.define("CMAKE_C_COMPILER", sanitize_cc(cc))
547 .define("CMAKE_CXX_COMPILER", sanitize_cc(cxx))
548 .define("CMAKE_ASM_COMPILER", sanitize_cc(cc));
551 cfg.build_arg("-j").build_arg(builder.jobs().to_string());
552 let mut cflags = builder.cflags(target, GitRepo::Llvm).join(" ");
553 if let Some(ref s) = builder.config.llvm_cflags {
554 cflags.push_str(&format!(" {}", s));
556 // Some compiler features used by LLVM (such as thread locals) will not work on a min version below iOS 10.
557 if target.contains("apple-ios") {
558 if target.contains("86-") {
559 cflags.push_str(" -miphonesimulator-version-min=10.0");
561 cflags.push_str(" -miphoneos-version-min=10.0");
564 if builder.config.llvm_clang_cl.is_some() {
565 cflags.push_str(&format!(" --target={}", target))
567 cfg.define("CMAKE_C_FLAGS", cflags);
568 let mut cxxflags = builder.cflags(target, GitRepo::Llvm).join(" ");
569 if builder.config.llvm_static_stdcpp && !target.contains("msvc") && !target.contains("netbsd") {
570 cxxflags.push_str(" -static-libstdc++");
572 if let Some(ref s) = builder.config.llvm_cxxflags {
573 cxxflags.push_str(&format!(" {}", s));
575 if builder.config.llvm_clang_cl.is_some() {
576 cxxflags.push_str(&format!(" --target={}", target))
578 cfg.define("CMAKE_CXX_FLAGS", cxxflags);
579 if let Some(ar) = builder.ar(target) {
580 if ar.is_absolute() {
581 // LLVM build breaks if `CMAKE_AR` is a relative path, for some reason it
582 // tries to resolve this path in the LLVM build directory.
583 cfg.define("CMAKE_AR", sanitize_cc(ar));
587 if let Some(ranlib) = builder.ranlib(target) {
588 if ranlib.is_absolute() {
589 // LLVM build breaks if `CMAKE_RANLIB` is a relative path, for some reason it
590 // tries to resolve this path in the LLVM build directory.
591 cfg.define("CMAKE_RANLIB", sanitize_cc(ranlib));
595 if let Some(ref s) = builder.config.llvm_ldflags {
596 cfg.define("CMAKE_SHARED_LINKER_FLAGS", s);
597 cfg.define("CMAKE_MODULE_LINKER_FLAGS", s);
598 cfg.define("CMAKE_EXE_LINKER_FLAGS", s);
601 if env::var_os("SCCACHE_ERROR_LOG").is_some() {
602 cfg.env("RUSTC_LOG", "sccache=warn");
606 #[derive(Debug, Copy, Clone, Hash, PartialEq, Eq)]
608 pub target: TargetSelection,
612 type Output = PathBuf;
613 const ONLY_HOSTS: bool = true;
615 fn should_run(run: ShouldRun<'_>) -> ShouldRun<'_> {
616 run.path("src/llvm-project/lld").path("src/tools/lld")
619 fn make_run(run: RunConfig<'_>) {
620 run.builder.ensure(Lld { target: run.target });
623 /// Compile LLD for `target`.
624 fn run(self, builder: &Builder<'_>) -> PathBuf {
625 if builder.config.dry_run {
626 return PathBuf::from("lld-out-dir-test-gen");
628 let target = self.target;
630 let llvm_config = builder.ensure(Llvm { target: self.target });
632 let out_dir = builder.lld_out(target);
633 let done_stamp = out_dir.join("lld-finished-building");
634 if done_stamp.exists() {
638 builder.info(&format!("Building LLD for {}", target));
639 let _time = util::timeit(&builder);
640 t!(fs::create_dir_all(&out_dir));
642 let mut cfg = cmake::Config::new(builder.src.join("src/llvm-project/lld"));
643 configure_cmake(builder, target, &mut cfg, true);
645 // This is an awful, awful hack. Discovered when we migrated to using
646 // clang-cl to compile LLVM/LLD it turns out that LLD, when built out of
647 // tree, will execute `llvm-config --cmakedir` and then tell CMake about
648 // that directory for later processing. Unfortunately if this path has
649 // forward slashes in it (which it basically always does on Windows)
650 // then CMake will hit a syntax error later on as... something isn't
653 // Instead of attempting to fix this problem in upstream CMake and/or
654 // LLVM/LLD we just hack around it here. This thin wrapper will take the
655 // output from llvm-config and replace all instances of `\` with `/` to
656 // ensure we don't hit the same bugs with escaping. It means that you
657 // can't build on a system where your paths require `\` on Windows, but
658 // there's probably a lot of reasons you can't do that other than this.
659 let llvm_config_shim = env::current_exe().unwrap().with_file_name("llvm-config-wrapper");
661 cfg.out_dir(&out_dir)
663 .env("LLVM_CONFIG_REAL", &llvm_config)
664 .define("LLVM_CONFIG_PATH", llvm_config_shim)
665 .define("LLVM_INCLUDE_TESTS", "OFF");
667 // While we're using this horrible workaround to shim the execution of
668 // llvm-config, let's just pile on more. I can't seem to figure out how
669 // to build LLD as a standalone project and also cross-compile it at the
670 // same time. It wants a natively executable `llvm-config` to learn
671 // about LLVM, but then it learns about all the host configuration of
672 // LLVM and tries to link to host LLVM libraries.
674 // To work around that we tell our shim to replace anything with the
675 // build target with the actual target instead. This'll break parts of
676 // LLD though which try to execute host tools, such as llvm-tblgen, so
677 // we specifically tell it where to find those. This is likely super
678 // brittle and will break over time. If anyone knows better how to
679 // cross-compile LLD it would be much appreciated to fix this!
680 if target != builder.config.build {
681 cfg.env("LLVM_CONFIG_SHIM_REPLACE", &builder.config.build.triple)
682 .env("LLVM_CONFIG_SHIM_REPLACE_WITH", &target.triple)
685 llvm_config.with_file_name("llvm-tblgen").with_extension(EXE_EXTENSION),
689 // Explicitly set C++ standard, because upstream doesn't do so
690 // for standalone builds.
691 cfg.define("CMAKE_CXX_STANDARD", "14");
695 t!(File::create(&done_stamp));
700 #[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
701 pub struct TestHelpers {
702 pub target: TargetSelection,
705 impl Step for TestHelpers {
708 fn should_run(run: ShouldRun<'_>) -> ShouldRun<'_> {
709 run.path("src/test/auxiliary/rust_test_helpers.c")
712 fn make_run(run: RunConfig<'_>) {
713 run.builder.ensure(TestHelpers { target: run.target })
716 /// Compiles the `rust_test_helpers.c` library which we used in various
717 /// `run-pass` tests for ABI testing.
718 fn run(self, builder: &Builder<'_>) {
719 if builder.config.dry_run {
722 // The x86_64-fortanix-unknown-sgx target doesn't have a working C
723 // toolchain. However, some x86_64 ELF objects can be linked
724 // without issues. Use this hack to compile the test helpers.
725 let target = if self.target == "x86_64-fortanix-unknown-sgx" {
726 TargetSelection::from_user("x86_64-unknown-linux-gnu")
730 let dst = builder.test_helpers_out(target);
731 let src = builder.src.join("src/test/auxiliary/rust_test_helpers.c");
732 if up_to_date(&src, &dst.join("librust_test_helpers.a")) {
736 builder.info("Building test helpers");
737 t!(fs::create_dir_all(&dst));
738 let mut cfg = cc::Build::new();
739 // FIXME: Workaround for https://github.com/emscripten-core/emscripten/issues/9013
740 if target.contains("emscripten") {
744 // We may have found various cross-compilers a little differently due to our
745 // extra configuration, so inform cc of these compilers. Note, though, that
746 // on MSVC we still need cc's detection of env vars (ugh).
747 if !target.contains("msvc") {
748 if let Some(ar) = builder.ar(target) {
751 cfg.compiler(builder.cc(target));
753 cfg.cargo_metadata(false)
755 .target(&target.triple)
756 .host(&builder.config.build.triple)
760 .file(builder.src.join("src/test/auxiliary/rust_test_helpers.c"))
761 .compile("rust_test_helpers");
765 #[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
766 pub struct Sanitizers {
767 pub target: TargetSelection,
770 impl Step for Sanitizers {
771 type Output = Vec<SanitizerRuntime>;
773 fn should_run(run: ShouldRun<'_>) -> ShouldRun<'_> {
774 run.path("src/llvm-project/compiler-rt").path("src/sanitizers")
777 fn make_run(run: RunConfig<'_>) {
778 run.builder.ensure(Sanitizers { target: run.target });
781 /// Builds sanitizer runtime libraries.
782 fn run(self, builder: &Builder<'_>) -> Self::Output {
783 let compiler_rt_dir = builder.src.join("src/llvm-project/compiler-rt");
784 if !compiler_rt_dir.exists() {
788 let out_dir = builder.native_dir(self.target).join("sanitizers");
789 let runtimes = supported_sanitizers(&out_dir, self.target, &builder.config.channel);
790 if runtimes.is_empty() {
794 let llvm_config = builder.ensure(Llvm { target: builder.config.build });
795 if builder.config.dry_run {
799 let stamp = out_dir.join("sanitizers-finished-building");
800 let stamp = HashStamp::new(stamp, builder.in_tree_llvm_info.sha());
803 if stamp.hash.is_none() {
804 builder.info(&format!(
805 "Rebuild sanitizers by removing the file `{}`",
812 builder.info(&format!("Building sanitizers for {}", self.target));
814 let _time = util::timeit(&builder);
816 let mut cfg = cmake::Config::new(&compiler_rt_dir);
817 cfg.profile("Release");
818 cfg.define("CMAKE_C_COMPILER_TARGET", self.target.triple);
819 cfg.define("COMPILER_RT_BUILD_BUILTINS", "OFF");
820 cfg.define("COMPILER_RT_BUILD_CRT", "OFF");
821 cfg.define("COMPILER_RT_BUILD_LIBFUZZER", "OFF");
822 cfg.define("COMPILER_RT_BUILD_PROFILE", "OFF");
823 cfg.define("COMPILER_RT_BUILD_SANITIZERS", "ON");
824 cfg.define("COMPILER_RT_BUILD_XRAY", "OFF");
825 cfg.define("COMPILER_RT_DEFAULT_TARGET_ONLY", "ON");
826 cfg.define("COMPILER_RT_USE_LIBCXX", "OFF");
827 cfg.define("LLVM_CONFIG_PATH", &llvm_config);
829 // On Darwin targets the sanitizer runtimes are build as universal binaries.
830 // Unfortunately sccache currently lacks support to build them successfully.
831 // Disable compiler launcher on Darwin targets to avoid potential issues.
832 let use_compiler_launcher = !self.target.contains("apple-darwin");
833 configure_cmake(builder, self.target, &mut cfg, use_compiler_launcher);
835 t!(fs::create_dir_all(&out_dir));
836 cfg.out_dir(out_dir);
838 for runtime in &runtimes {
839 cfg.build_target(&runtime.cmake_target);
848 #[derive(Clone, Debug)]
849 pub struct SanitizerRuntime {
850 /// CMake target used to build the runtime.
851 pub cmake_target: String,
852 /// Path to the built runtime library.
854 /// Library filename that will be used rustc.
858 /// Returns sanitizers available on a given target.
859 fn supported_sanitizers(
861 target: TargetSelection,
863 ) -> Vec<SanitizerRuntime> {
864 let darwin_libs = |os: &str, components: &[&str]| -> Vec<SanitizerRuntime> {
867 .map(move |c| SanitizerRuntime {
868 cmake_target: format!("clang_rt.{}_{}_dynamic", c, os),
870 .join(&format!("build/lib/darwin/libclang_rt.{}_{}_dynamic.dylib", c, os)),
871 name: format!("librustc-{}_rt.{}.dylib", channel, c),
876 let common_libs = |os: &str, arch: &str, components: &[&str]| -> Vec<SanitizerRuntime> {
879 .map(move |c| SanitizerRuntime {
880 cmake_target: format!("clang_rt.{}-{}", c, arch),
881 path: out_dir.join(&format!("build/lib/{}/libclang_rt.{}-{}.a", os, c, arch)),
882 name: format!("librustc-{}_rt.{}.a", channel, c),
887 match &*target.triple {
888 "aarch64-apple-darwin" => darwin_libs("osx", &["asan", "lsan", "tsan"]),
889 "aarch64-fuchsia" => common_libs("fuchsia", "aarch64", &["asan"]),
890 "aarch64-unknown-linux-gnu" => {
891 common_libs("linux", "aarch64", &["asan", "lsan", "msan", "tsan", "hwasan"])
893 "x86_64-apple-darwin" => darwin_libs("osx", &["asan", "lsan", "tsan"]),
894 "x86_64-fuchsia" => common_libs("fuchsia", "x86_64", &["asan"]),
895 "x86_64-unknown-freebsd" => common_libs("freebsd", "x86_64", &["asan", "msan", "tsan"]),
896 "x86_64-unknown-linux-gnu" => {
897 common_libs("linux", "x86_64", &["asan", "lsan", "msan", "tsan"])
899 "x86_64-unknown-linux-musl" => {
900 common_libs("linux", "x86_64", &["asan", "lsan", "msan", "tsan"])
908 hash: Option<Vec<u8>>,
912 fn new(path: PathBuf, hash: Option<&str>) -> Self {
913 HashStamp { path, hash: hash.map(|s| s.as_bytes().to_owned()) }
916 fn is_done(&self) -> bool {
917 match fs::read(&self.path) {
918 Ok(h) => self.hash.as_deref().unwrap_or(b"") == h.as_slice(),
919 Err(e) if e.kind() == io::ErrorKind::NotFound => false,
921 panic!("failed to read stamp file `{}`: {}", self.path.display(), e);
926 fn remove(&self) -> io::Result<()> {
927 match fs::remove_file(&self.path) {
930 if e.kind() == io::ErrorKind::NotFound {
939 fn write(&self) -> io::Result<()> {
940 fs::write(&self.path, self.hash.as_deref().unwrap_or(b""))