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..])
121 } else if self.target.starts_with("powerpc") && self.target.ends_with("freebsd") {
122 // FreeBSD 13 had incompatible ABI changes on all PowerPC platforms.
123 // Set the version suffix to 13.0 so the correct target details are used.
124 format!("{}{}", self.target, "13.0")
129 let Meta { stamp, build_llvm_config, out_dir, root } =
130 match prebuilt_llvm_config(builder, target) {
135 builder.update_submodule(&Path::new("src").join("llvm-project"));
136 if builder.config.llvm_link_shared
137 && (target.contains("windows") || target.contains("apple-darwin"))
139 panic!("shared linking to LLVM is not currently supported on {}", target.triple);
142 builder.info(&format!("Building LLVM for {}", target));
144 let _time = util::timeit(&builder);
145 t!(fs::create_dir_all(&out_dir));
147 // https://llvm.org/docs/CMake.html
148 let mut cfg = cmake::Config::new(builder.src.join(root));
150 let profile = match (builder.config.llvm_optimize, builder.config.llvm_release_debuginfo) {
151 (false, _) => "Debug",
152 (true, false) => "Release",
153 (true, true) => "RelWithDebInfo",
156 // NOTE: remember to also update `config.toml.example` when changing the
158 let llvm_targets = match &builder.config.llvm_targets {
161 "AArch64;ARM;BPF;Hexagon;MSP430;Mips;NVPTX;PowerPC;RISCV;\
162 Sparc;SystemZ;WebAssembly;X86"
166 let llvm_exp_targets = match builder.config.llvm_experimental_targets {
171 let assertions = if builder.config.llvm_assertions { "ON" } else { "OFF" };
172 let plugins = if builder.config.llvm_plugins { "ON" } else { "OFF" };
174 cfg.out_dir(&out_dir)
176 .define("LLVM_ENABLE_ASSERTIONS", assertions)
177 .define("LLVM_ENABLE_PLUGINS", plugins)
178 .define("LLVM_TARGETS_TO_BUILD", llvm_targets)
179 .define("LLVM_EXPERIMENTAL_TARGETS_TO_BUILD", llvm_exp_targets)
180 .define("LLVM_INCLUDE_EXAMPLES", "OFF")
181 .define("LLVM_INCLUDE_DOCS", "OFF")
182 .define("LLVM_INCLUDE_BENCHMARKS", "OFF")
183 .define("LLVM_ENABLE_TERMINFO", "OFF")
184 .define("LLVM_ENABLE_LIBEDIT", "OFF")
185 .define("LLVM_ENABLE_BINDINGS", "OFF")
186 .define("LLVM_ENABLE_Z3_SOLVER", "OFF")
187 .define("LLVM_PARALLEL_COMPILE_JOBS", builder.jobs().to_string())
188 .define("LLVM_TARGET_ARCH", target_native.split('-').next().unwrap())
189 .define("LLVM_DEFAULT_TARGET_TRIPLE", target_native);
191 if target != "aarch64-apple-darwin" && !target.contains("windows") {
192 cfg.define("LLVM_ENABLE_ZLIB", "ON");
194 cfg.define("LLVM_ENABLE_ZLIB", "OFF");
197 // Are we compiling for iOS/tvOS?
198 if target.contains("apple-ios") || target.contains("apple-tvos") {
199 // These two defines prevent CMake from automatically trying to add a MacOSX sysroot, which leads to a compiler error.
200 cfg.define("CMAKE_OSX_SYSROOT", "/");
201 cfg.define("CMAKE_OSX_DEPLOYMENT_TARGET", "");
202 // Prevent cmake from adding -bundle to CFLAGS automatically, which leads to a compiler error because "-bitcode_bundle" also gets added.
203 cfg.define("LLVM_ENABLE_PLUGINS", "OFF");
204 // Zlib fails to link properly, leading to a compiler error.
205 cfg.define("LLVM_ENABLE_ZLIB", "OFF");
208 if builder.config.llvm_thin_lto {
209 cfg.define("LLVM_ENABLE_LTO", "Thin");
210 if !target.contains("apple") {
211 cfg.define("LLVM_ENABLE_LLD", "ON");
215 // This setting makes the LLVM tools link to the dynamic LLVM library,
216 // which saves both memory during parallel links and overall disk space
217 // for the tools. We don't do this on every platform as it doesn't work
218 // equally well everywhere.
220 // If we're not linking rustc to a dynamic LLVM, though, then don't link
222 if builder.llvm_link_tools_dynamically(target) && builder.config.llvm_link_shared {
223 cfg.define("LLVM_LINK_LLVM_DYLIB", "ON");
226 // For distribution we want the LLVM tools to be *statically* linked to libstdc++
227 if builder.config.llvm_tools_enabled {
228 if !target.contains("msvc") {
229 if target.contains("apple") {
230 cfg.define("CMAKE_EXE_LINKER_FLAGS", "-static-libstdc++");
232 cfg.define("CMAKE_EXE_LINKER_FLAGS", "-Wl,-Bsymbolic -static-libstdc++");
237 if target.starts_with("riscv") {
238 // In RISC-V, using C++ atomics require linking to `libatomic` but the LLVM build
239 // system check cannot detect this. Therefore it is set manually here.
240 if !builder.config.llvm_tools_enabled {
241 cfg.define("CMAKE_EXE_LINKER_FLAGS", "-latomic");
243 cfg.define("CMAKE_EXE_LINKER_FLAGS", "-latomic -static-libstdc++");
245 cfg.define("CMAKE_SHARED_LINKER_FLAGS", "-latomic");
248 if target.contains("msvc") {
249 cfg.define("LLVM_USE_CRT_DEBUG", "MT");
250 cfg.define("LLVM_USE_CRT_RELEASE", "MT");
251 cfg.define("LLVM_USE_CRT_RELWITHDEBINFO", "MT");
252 cfg.static_crt(true);
255 if target.starts_with("i686") {
256 cfg.define("LLVM_BUILD_32_BITS", "ON");
259 let mut enabled_llvm_projects = Vec::new();
261 if util::forcing_clang_based_tests() {
262 enabled_llvm_projects.push("clang");
263 enabled_llvm_projects.push("compiler-rt");
266 if builder.config.llvm_polly {
267 enabled_llvm_projects.push("polly");
270 if builder.config.llvm_clang {
271 enabled_llvm_projects.push("clang");
274 // We want libxml to be disabled.
275 // See https://github.com/rust-lang/rust/pull/50104
276 cfg.define("LLVM_ENABLE_LIBXML2", "OFF");
278 if !enabled_llvm_projects.is_empty() {
279 enabled_llvm_projects.sort();
280 enabled_llvm_projects.dedup();
281 cfg.define("LLVM_ENABLE_PROJECTS", enabled_llvm_projects.join(";"));
284 if let Some(num_linkers) = builder.config.llvm_link_jobs {
286 cfg.define("LLVM_PARALLEL_LINK_JOBS", num_linkers.to_string());
290 // Workaround for ppc32 lld limitation
291 if target == "powerpc-unknown-freebsd" {
292 cfg.define("CMAKE_EXE_LINKER_FLAGS", "-fuse-ld=bfd");
295 // https://llvm.org/docs/HowToCrossCompileLLVM.html
296 if target != builder.config.build {
297 builder.ensure(Llvm { target: builder.config.build });
298 // FIXME: if the llvm root for the build triple is overridden then we
299 // should use llvm-tblgen from there, also should verify that it
300 // actually exists most of the time in normal installs of LLVM.
301 let host_bin = builder.llvm_out(builder.config.build).join("bin");
302 cfg.define("CMAKE_CROSSCOMPILING", "True");
303 cfg.define("LLVM_TABLEGEN", host_bin.join("llvm-tblgen").with_extension(EXE_EXTENSION));
304 cfg.define("LLVM_NM", host_bin.join("llvm-nm").with_extension(EXE_EXTENSION));
307 host_bin.join("llvm-config").with_extension(EXE_EXTENSION),
311 if let Some(ref suffix) = builder.config.llvm_version_suffix {
312 // Allow version-suffix="" to not define a version suffix at all.
313 if !suffix.is_empty() {
314 cfg.define("LLVM_VERSION_SUFFIX", suffix);
316 } else if builder.config.channel == "dev" {
317 // Changes to a version suffix require a complete rebuild of the LLVM.
318 // To avoid rebuilds during a time of version bump, don't include rustc
319 // release number on the dev channel.
320 cfg.define("LLVM_VERSION_SUFFIX", "-rust-dev");
322 let suffix = format!("-rust-{}-{}", builder.version, builder.config.channel);
323 cfg.define("LLVM_VERSION_SUFFIX", suffix);
326 if let Some(ref linker) = builder.config.llvm_use_linker {
327 cfg.define("LLVM_USE_LINKER", linker);
330 if builder.config.llvm_allow_old_toolchain {
331 cfg.define("LLVM_TEMPORARILY_ALLOW_OLD_TOOLCHAIN", "YES");
334 configure_cmake(builder, target, &mut cfg, true);
336 // FIXME: we don't actually need to build all LLVM tools and all LLVM
337 // libraries here, e.g., we just want a few components and a few
338 // tools. Figure out how to filter them down and only build the right
339 // tools and libs on all platforms.
341 if builder.config.dry_run {
342 return build_llvm_config;
353 fn check_llvm_version(builder: &Builder<'_>, llvm_config: &Path) {
354 if !builder.config.llvm_version_check {
358 if builder.config.dry_run {
362 let mut cmd = Command::new(llvm_config);
363 let version = output(cmd.arg("--version"));
364 let mut parts = version.split('.').take(2).filter_map(|s| s.parse::<u32>().ok());
365 if let (Some(major), Some(_minor)) = (parts.next(), parts.next()) {
370 panic!("\n\nbad LLVM version: {}, need >=10.0\n\n", version)
374 builder: &Builder<'_>,
375 target: TargetSelection,
376 cfg: &mut cmake::Config,
377 use_compiler_launcher: bool,
379 // Do not print installation messages for up-to-date files.
380 // LLVM and LLD builds can produce a lot of those and hit CI limits on log size.
381 cfg.define("CMAKE_INSTALL_MESSAGE", "LAZY");
383 // Do not allow the user's value of DESTDIR to influence where
384 // LLVM will install itself. LLVM must always be installed in our
385 // own build directories.
386 cfg.env("DESTDIR", "");
389 cfg.generator("Ninja");
391 cfg.target(&target.triple).host(&builder.config.build.triple);
393 if target != builder.config.build {
394 if target.contains("netbsd") {
395 cfg.define("CMAKE_SYSTEM_NAME", "NetBSD");
396 } else if target.contains("freebsd") {
397 cfg.define("CMAKE_SYSTEM_NAME", "FreeBSD");
398 } else if target.contains("windows") {
399 cfg.define("CMAKE_SYSTEM_NAME", "Windows");
400 } else if target.contains("haiku") {
401 cfg.define("CMAKE_SYSTEM_NAME", "Haiku");
402 } else if target.contains("solaris") || target.contains("illumos") {
403 cfg.define("CMAKE_SYSTEM_NAME", "SunOS");
405 // When cross-compiling we should also set CMAKE_SYSTEM_VERSION, but in
406 // that case like CMake we cannot easily determine system version either.
408 // Since, the LLVM itself makes rather limited use of version checks in
409 // CMakeFiles (and then only in tests), and so far no issues have been
410 // reported, the system version is currently left unset.
413 let sanitize_cc = |cc: &Path| {
414 if target.contains("msvc") {
415 OsString::from(cc.to_str().unwrap().replace("\\", "/"))
417 cc.as_os_str().to_owned()
421 // MSVC with CMake uses msbuild by default which doesn't respect these
422 // vars that we'd otherwise configure. In that case we just skip this
424 if target.contains("msvc") && !builder.ninja() {
428 let (cc, cxx) = match builder.config.llvm_clang_cl {
429 Some(ref cl) => (cl.as_ref(), cl.as_ref()),
430 None => (builder.cc(target), builder.cxx(target).unwrap()),
433 // Handle msvc + ninja + ccache specially (this is what the bots use)
434 if target.contains("msvc") && builder.ninja() && builder.config.ccache.is_some() {
435 let mut wrap_cc = env::current_exe().expect("failed to get cwd");
436 wrap_cc.set_file_name("sccache-plus-cl.exe");
438 cfg.define("CMAKE_C_COMPILER", sanitize_cc(&wrap_cc))
439 .define("CMAKE_CXX_COMPILER", sanitize_cc(&wrap_cc));
440 cfg.env("SCCACHE_PATH", builder.config.ccache.as_ref().unwrap())
441 .env("SCCACHE_TARGET", target.triple)
442 .env("SCCACHE_CC", &cc)
443 .env("SCCACHE_CXX", &cxx);
445 // Building LLVM on MSVC can be a little ludicrous at times. We're so far
446 // off the beaten path here that I'm not really sure this is even half
447 // supported any more. Here we're trying to:
449 // * Build LLVM on MSVC
450 // * Build LLVM with `clang-cl` instead of `cl.exe`
451 // * Build a project with `sccache`
452 // * Build for 32-bit as well
453 // * Build with Ninja
455 // For `cl.exe` there are different binaries to compile 32/64 bit which
456 // we use but for `clang-cl` there's only one which internally
457 // multiplexes via flags. As a result it appears that CMake's detection
458 // of a compiler's architecture and such on MSVC **doesn't** pass any
459 // custom flags we pass in CMAKE_CXX_FLAGS below. This means that if we
460 // use `clang-cl.exe` it's always diagnosed as a 64-bit compiler which
461 // definitely causes problems since all the env vars are pointing to
464 // To hack around this... again... we pass an argument that's
465 // unconditionally passed in the sccache shim. This'll get CMake to
466 // correctly diagnose it's doing a 32-bit compilation and LLVM will
467 // internally configure itself appropriately.
468 if builder.config.llvm_clang_cl.is_some() && target.contains("i686") {
469 cfg.env("SCCACHE_EXTRA_ARGS", "-m32");
472 // If ccache is configured we inform the build a little differently how
473 // to invoke ccache while also invoking our compilers.
474 if use_compiler_launcher {
475 if let Some(ref ccache) = builder.config.ccache {
476 cfg.define("CMAKE_C_COMPILER_LAUNCHER", ccache)
477 .define("CMAKE_CXX_COMPILER_LAUNCHER", ccache);
480 cfg.define("CMAKE_C_COMPILER", sanitize_cc(cc))
481 .define("CMAKE_CXX_COMPILER", sanitize_cc(cxx))
482 .define("CMAKE_ASM_COMPILER", sanitize_cc(cc));
485 cfg.build_arg("-j").build_arg(builder.jobs().to_string());
486 let mut cflags = builder.cflags(target, GitRepo::Llvm).join(" ");
487 if let Some(ref s) = builder.config.llvm_cflags {
488 cflags.push_str(&format!(" {}", s));
490 // Some compiler features used by LLVM (such as thread locals) will not work on a min version below iOS 10.
491 if target.contains("apple-ios") {
492 if target.contains("86-") {
493 cflags.push_str(" -miphonesimulator-version-min=10.0");
495 cflags.push_str(" -miphoneos-version-min=10.0");
498 if builder.config.llvm_clang_cl.is_some() {
499 cflags.push_str(&format!(" --target={}", target))
501 cfg.define("CMAKE_C_FLAGS", cflags);
502 let mut cxxflags = builder.cflags(target, GitRepo::Llvm).join(" ");
503 if builder.config.llvm_static_stdcpp && !target.contains("msvc") && !target.contains("netbsd") {
504 cxxflags.push_str(" -static-libstdc++");
506 if let Some(ref s) = builder.config.llvm_cxxflags {
507 cxxflags.push_str(&format!(" {}", s));
509 if builder.config.llvm_clang_cl.is_some() {
510 cxxflags.push_str(&format!(" --target={}", target))
512 cfg.define("CMAKE_CXX_FLAGS", cxxflags);
513 if let Some(ar) = builder.ar(target) {
514 if ar.is_absolute() {
515 // LLVM build breaks if `CMAKE_AR` is a relative path, for some reason it
516 // tries to resolve this path in the LLVM build directory.
517 cfg.define("CMAKE_AR", sanitize_cc(ar));
521 if let Some(ranlib) = builder.ranlib(target) {
522 if ranlib.is_absolute() {
523 // LLVM build breaks if `CMAKE_RANLIB` is a relative path, for some reason it
524 // tries to resolve this path in the LLVM build directory.
525 cfg.define("CMAKE_RANLIB", sanitize_cc(ranlib));
529 if let Some(ref s) = builder.config.llvm_ldflags {
530 cfg.define("CMAKE_SHARED_LINKER_FLAGS", s);
531 cfg.define("CMAKE_MODULE_LINKER_FLAGS", s);
532 cfg.define("CMAKE_EXE_LINKER_FLAGS", s);
535 if env::var_os("SCCACHE_ERROR_LOG").is_some() {
536 cfg.env("RUSTC_LOG", "sccache=warn");
540 #[derive(Debug, Copy, Clone, Hash, PartialEq, Eq)]
542 pub target: TargetSelection,
546 type Output = PathBuf;
547 const ONLY_HOSTS: bool = true;
549 fn should_run(run: ShouldRun<'_>) -> ShouldRun<'_> {
550 run.path("src/llvm-project/lld").path("src/tools/lld")
553 fn make_run(run: RunConfig<'_>) {
554 run.builder.ensure(Lld { target: run.target });
557 /// Compile LLD for `target`.
558 fn run(self, builder: &Builder<'_>) -> PathBuf {
559 if builder.config.dry_run {
560 return PathBuf::from("lld-out-dir-test-gen");
562 let target = self.target;
564 let llvm_config = builder.ensure(Llvm { target: self.target });
566 let out_dir = builder.lld_out(target);
567 let done_stamp = out_dir.join("lld-finished-building");
568 if done_stamp.exists() {
572 builder.info(&format!("Building LLD for {}", target));
573 let _time = util::timeit(&builder);
574 t!(fs::create_dir_all(&out_dir));
576 let mut cfg = cmake::Config::new(builder.src.join("src/llvm-project/lld"));
577 configure_cmake(builder, target, &mut cfg, true);
579 // This is an awful, awful hack. Discovered when we migrated to using
580 // clang-cl to compile LLVM/LLD it turns out that LLD, when built out of
581 // tree, will execute `llvm-config --cmakedir` and then tell CMake about
582 // that directory for later processing. Unfortunately if this path has
583 // forward slashes in it (which it basically always does on Windows)
584 // then CMake will hit a syntax error later on as... something isn't
587 // Instead of attempting to fix this problem in upstream CMake and/or
588 // LLVM/LLD we just hack around it here. This thin wrapper will take the
589 // output from llvm-config and replace all instances of `\` with `/` to
590 // ensure we don't hit the same bugs with escaping. It means that you
591 // can't build on a system where your paths require `\` on Windows, but
592 // there's probably a lot of reasons you can't do that other than this.
593 let llvm_config_shim = env::current_exe().unwrap().with_file_name("llvm-config-wrapper");
595 cfg.out_dir(&out_dir)
597 .env("LLVM_CONFIG_REAL", &llvm_config)
598 .define("LLVM_CONFIG_PATH", llvm_config_shim)
599 .define("LLVM_INCLUDE_TESTS", "OFF");
601 // While we're using this horrible workaround to shim the execution of
602 // llvm-config, let's just pile on more. I can't seem to figure out how
603 // to build LLD as a standalone project and also cross-compile it at the
604 // same time. It wants a natively executable `llvm-config` to learn
605 // about LLVM, but then it learns about all the host configuration of
606 // LLVM and tries to link to host LLVM libraries.
608 // To work around that we tell our shim to replace anything with the
609 // build target with the actual target instead. This'll break parts of
610 // LLD though which try to execute host tools, such as llvm-tblgen, so
611 // we specifically tell it where to find those. This is likely super
612 // brittle and will break over time. If anyone knows better how to
613 // cross-compile LLD it would be much appreciated to fix this!
614 if target != builder.config.build {
615 cfg.env("LLVM_CONFIG_SHIM_REPLACE", &builder.config.build.triple)
616 .env("LLVM_CONFIG_SHIM_REPLACE_WITH", &target.triple)
619 llvm_config.with_file_name("llvm-tblgen").with_extension(EXE_EXTENSION),
623 // Explicitly set C++ standard, because upstream doesn't do so
624 // for standalone builds.
625 cfg.define("CMAKE_CXX_STANDARD", "14");
629 t!(File::create(&done_stamp));
634 #[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
635 pub struct TestHelpers {
636 pub target: TargetSelection,
639 impl Step for TestHelpers {
642 fn should_run(run: ShouldRun<'_>) -> ShouldRun<'_> {
643 run.path("src/test/auxiliary/rust_test_helpers.c")
646 fn make_run(run: RunConfig<'_>) {
647 run.builder.ensure(TestHelpers { target: run.target })
650 /// Compiles the `rust_test_helpers.c` library which we used in various
651 /// `run-pass` tests for ABI testing.
652 fn run(self, builder: &Builder<'_>) {
653 if builder.config.dry_run {
656 // The x86_64-fortanix-unknown-sgx target doesn't have a working C
657 // toolchain. However, some x86_64 ELF objects can be linked
658 // without issues. Use this hack to compile the test helpers.
659 let target = if self.target == "x86_64-fortanix-unknown-sgx" {
660 TargetSelection::from_user("x86_64-unknown-linux-gnu")
664 let dst = builder.test_helpers_out(target);
665 let src = builder.src.join("src/test/auxiliary/rust_test_helpers.c");
666 if up_to_date(&src, &dst.join("librust_test_helpers.a")) {
670 builder.info("Building test helpers");
671 t!(fs::create_dir_all(&dst));
672 let mut cfg = cc::Build::new();
673 // FIXME: Workaround for https://github.com/emscripten-core/emscripten/issues/9013
674 if target.contains("emscripten") {
678 // We may have found various cross-compilers a little differently due to our
679 // extra configuration, so inform cc of these compilers. Note, though, that
680 // on MSVC we still need cc's detection of env vars (ugh).
681 if !target.contains("msvc") {
682 if let Some(ar) = builder.ar(target) {
685 cfg.compiler(builder.cc(target));
687 cfg.cargo_metadata(false)
689 .target(&target.triple)
690 .host(&builder.config.build.triple)
694 .file(builder.src.join("src/test/auxiliary/rust_test_helpers.c"))
695 .compile("rust_test_helpers");
699 #[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
700 pub struct Sanitizers {
701 pub target: TargetSelection,
704 impl Step for Sanitizers {
705 type Output = Vec<SanitizerRuntime>;
707 fn should_run(run: ShouldRun<'_>) -> ShouldRun<'_> {
708 run.path("src/llvm-project/compiler-rt").path("src/sanitizers")
711 fn make_run(run: RunConfig<'_>) {
712 run.builder.ensure(Sanitizers { target: run.target });
715 /// Builds sanitizer runtime libraries.
716 fn run(self, builder: &Builder<'_>) -> Self::Output {
717 let compiler_rt_dir = builder.src.join("src/llvm-project/compiler-rt");
718 if !compiler_rt_dir.exists() {
722 let out_dir = builder.native_dir(self.target).join("sanitizers");
723 let runtimes = supported_sanitizers(&out_dir, self.target, &builder.config.channel);
724 if runtimes.is_empty() {
728 let llvm_config = builder.ensure(Llvm { target: builder.config.build });
729 if builder.config.dry_run {
733 let stamp = out_dir.join("sanitizers-finished-building");
734 let stamp = HashStamp::new(stamp, builder.in_tree_llvm_info.sha());
737 if stamp.hash.is_none() {
738 builder.info(&format!(
739 "Rebuild sanitizers by removing the file `{}`",
746 builder.info(&format!("Building sanitizers for {}", self.target));
748 let _time = util::timeit(&builder);
750 let mut cfg = cmake::Config::new(&compiler_rt_dir);
751 cfg.profile("Release");
752 cfg.define("CMAKE_C_COMPILER_TARGET", self.target.triple);
753 cfg.define("COMPILER_RT_BUILD_BUILTINS", "OFF");
754 cfg.define("COMPILER_RT_BUILD_CRT", "OFF");
755 cfg.define("COMPILER_RT_BUILD_LIBFUZZER", "OFF");
756 cfg.define("COMPILER_RT_BUILD_PROFILE", "OFF");
757 cfg.define("COMPILER_RT_BUILD_SANITIZERS", "ON");
758 cfg.define("COMPILER_RT_BUILD_XRAY", "OFF");
759 cfg.define("COMPILER_RT_DEFAULT_TARGET_ONLY", "ON");
760 cfg.define("COMPILER_RT_USE_LIBCXX", "OFF");
761 cfg.define("LLVM_CONFIG_PATH", &llvm_config);
763 // On Darwin targets the sanitizer runtimes are build as universal binaries.
764 // Unfortunately sccache currently lacks support to build them successfully.
765 // Disable compiler launcher on Darwin targets to avoid potential issues.
766 let use_compiler_launcher = !self.target.contains("apple-darwin");
767 configure_cmake(builder, self.target, &mut cfg, use_compiler_launcher);
769 t!(fs::create_dir_all(&out_dir));
770 cfg.out_dir(out_dir);
772 for runtime in &runtimes {
773 cfg.build_target(&runtime.cmake_target);
782 #[derive(Clone, Debug)]
783 pub struct SanitizerRuntime {
784 /// CMake target used to build the runtime.
785 pub cmake_target: String,
786 /// Path to the built runtime library.
788 /// Library filename that will be used rustc.
792 /// Returns sanitizers available on a given target.
793 fn supported_sanitizers(
795 target: TargetSelection,
797 ) -> Vec<SanitizerRuntime> {
798 let darwin_libs = |os: &str, components: &[&str]| -> Vec<SanitizerRuntime> {
801 .map(move |c| SanitizerRuntime {
802 cmake_target: format!("clang_rt.{}_{}_dynamic", c, os),
804 .join(&format!("build/lib/darwin/libclang_rt.{}_{}_dynamic.dylib", c, os)),
805 name: format!("librustc-{}_rt.{}.dylib", channel, c),
810 let common_libs = |os: &str, arch: &str, components: &[&str]| -> Vec<SanitizerRuntime> {
813 .map(move |c| SanitizerRuntime {
814 cmake_target: format!("clang_rt.{}-{}", c, arch),
815 path: out_dir.join(&format!("build/lib/{}/libclang_rt.{}-{}.a", os, c, arch)),
816 name: format!("librustc-{}_rt.{}.a", channel, c),
821 match &*target.triple {
822 "aarch64-apple-darwin" => darwin_libs("osx", &["asan", "lsan", "tsan"]),
823 "aarch64-fuchsia" => common_libs("fuchsia", "aarch64", &["asan"]),
824 "aarch64-unknown-linux-gnu" => {
825 common_libs("linux", "aarch64", &["asan", "lsan", "msan", "tsan", "hwasan"])
827 "x86_64-apple-darwin" => darwin_libs("osx", &["asan", "lsan", "tsan"]),
828 "x86_64-fuchsia" => common_libs("fuchsia", "x86_64", &["asan"]),
829 "x86_64-unknown-freebsd" => common_libs("freebsd", "x86_64", &["asan", "msan", "tsan"]),
830 "x86_64-unknown-netbsd" => {
831 common_libs("netbsd", "x86_64", &["asan", "lsan", "msan", "tsan"])
833 "x86_64-unknown-linux-gnu" => {
834 common_libs("linux", "x86_64", &["asan", "lsan", "msan", "tsan"])
836 "x86_64-unknown-linux-musl" => {
837 common_libs("linux", "x86_64", &["asan", "lsan", "msan", "tsan"])
845 hash: Option<Vec<u8>>,
849 fn new(path: PathBuf, hash: Option<&str>) -> Self {
850 HashStamp { path, hash: hash.map(|s| s.as_bytes().to_owned()) }
853 fn is_done(&self) -> bool {
854 match fs::read(&self.path) {
855 Ok(h) => self.hash.as_deref().unwrap_or(b"") == h.as_slice(),
856 Err(e) if e.kind() == io::ErrorKind::NotFound => false,
858 panic!("failed to read stamp file `{}`: {}", self.path.display(), e);
863 fn remove(&self) -> io::Result<()> {
864 match fs::remove_file(&self.path) {
867 if e.kind() == io::ErrorKind::NotFound {
876 fn write(&self) -> io::Result<()> {
877 fs::write(&self.path, self.hash.as_deref().unwrap_or(b""))
881 #[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
882 pub struct CrtBeginEnd {
883 pub target: TargetSelection,
886 impl Step for CrtBeginEnd {
887 type Output = PathBuf;
889 fn should_run(run: ShouldRun<'_>) -> ShouldRun<'_> {
890 run.path("src/llvm-project/compiler-rt/lib/crt")
893 fn make_run(run: RunConfig<'_>) {
894 run.builder.ensure(CrtBeginEnd { target: run.target });
897 /// Build crtbegin.o/crtend.o for musl target.
898 fn run(self, builder: &Builder<'_>) -> Self::Output {
899 let out_dir = builder.native_dir(self.target).join("crt");
901 if builder.config.dry_run {
905 let crtbegin_src = builder.src.join("src/llvm-project/compiler-rt/lib/crt/crtbegin.c");
906 let crtend_src = builder.src.join("src/llvm-project/compiler-rt/lib/crt/crtend.c");
907 if up_to_date(&crtbegin_src, &out_dir.join("crtbegin.o"))
908 && up_to_date(&crtend_src, &out_dir.join("crtendS.o"))
913 builder.info("Building crtbegin.o and crtend.o");
914 t!(fs::create_dir_all(&out_dir));
916 let mut cfg = cc::Build::new();
918 if let Some(ar) = builder.ar(self.target) {
921 cfg.compiler(builder.cc(self.target));
922 cfg.cargo_metadata(false)
924 .target(&self.target.triple)
925 .host(&builder.config.build.triple)
932 // Those flags are defined in src/llvm-project/compiler-rt/lib/crt/CMakeLists.txt
933 // Currently only consumer of those objects is musl, which use .init_array/.fini_array
934 // instead of .ctors/.dtors
936 .define("CRT_HAS_INITFINI_ARRAY", None)
937 .define("EH_USE_FRAME_REGISTRY", None);
941 t!(fs::copy(out_dir.join("crtbegin.o"), out_dir.join("crtbeginS.o")));
942 t!(fs::copy(out_dir.join("crtend.o"), out_dir.join("crtendS.o")));