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::{OsStr, OsString};
14 use std::fs::{self, File};
16 use std::path::{Path, PathBuf};
17 use std::process::Command;
19 use crate::bolt::{instrument_with_bolt_inplace, optimize_library_with_bolt_inplace};
20 use crate::builder::{Builder, RunConfig, ShouldRun, Step};
22 use crate::config::{Config, TargetSelection};
23 use crate::util::get_clang_cl_resource_dir;
24 use crate::util::{self, exe, output, t, up_to_date};
25 use crate::{CLang, GitRepo};
29 build_llvm_config: PathBuf,
34 // Linker flags to pass to LLVM's CMake invocation.
35 #[derive(Debug, Clone, Default)]
37 // CMAKE_EXE_LINKER_FLAGS
39 // CMAKE_SHARED_LINKER_FLAGS
41 // CMAKE_MODULE_LINKER_FLAGS
46 fn push_all(&mut self, s: impl AsRef<OsStr>) {
50 self.shared.push(" ");
52 self.module.push(" ");
57 // This returns whether we've already previously built LLVM.
59 // It's used to avoid busting caches during x.py check -- if we've already built
60 // LLVM, it's fine for us to not try to avoid doing so.
62 // This will return the llvm-config if it can get it (but it will not build it
64 pub fn prebuilt_llvm_config(
65 builder: &Builder<'_>,
66 target: TargetSelection,
67 ) -> Result<PathBuf, Meta> {
68 builder.config.maybe_download_ci_llvm();
70 // If we're using a custom LLVM bail out here, but we can only use a
71 // custom LLVM for the build triple.
72 if let Some(config) = builder.config.target_config.get(&target) {
73 if let Some(ref s) = config.llvm_config {
74 check_llvm_version(builder, s);
75 return Ok(s.to_path_buf());
79 let root = "src/llvm-project/llvm";
80 let out_dir = builder.llvm_out(target);
82 let mut llvm_config_ret_dir = builder.llvm_out(builder.config.build);
83 if !builder.config.build.contains("msvc") || builder.ninja() {
84 llvm_config_ret_dir.push("build");
86 llvm_config_ret_dir.push("bin");
88 let build_llvm_config = llvm_config_ret_dir.join(exe("llvm-config", builder.config.build));
90 let stamp = out_dir.join("llvm-finished-building");
91 let stamp = HashStamp::new(stamp, builder.in_tree_llvm_info.sha());
93 if builder.config.llvm_skip_rebuild && stamp.path.exists() {
96 Using a potentially stale build of LLVM; \
97 This may not behave well.",
99 return Ok(build_llvm_config);
103 if stamp.hash.is_none() {
105 "Could not determine the LLVM submodule commit hash. \
106 Assuming that an LLVM rebuild is not necessary.",
108 builder.info(&format!(
109 "To force LLVM to rebuild, remove the file `{}`",
113 return Ok(build_llvm_config);
116 Err(Meta { stamp, build_llvm_config, out_dir, root: root.into() })
119 /// This retrieves the LLVM sha we *want* to use, according to git history.
120 pub(crate) fn detect_llvm_sha(config: &Config, is_git: bool) -> String {
121 let llvm_sha = if is_git {
122 let mut rev_list = config.git();
124 PathBuf::from("rev-list"),
125 format!("--author={}", config.stage0_metadata.config.git_merge_commit_email).into(),
127 "--first-parent".into(),
130 config.src.join("src/llvm-project"),
131 config.src.join("src/bootstrap/download-ci-llvm-stamp"),
132 // the LLVM shared object file is named `LLVM-12-rust-{version}-nightly`
133 config.src.join("src/version"),
135 output(&mut rev_list).trim().to_owned()
136 } else if let Some(info) = channel::read_commit_info_file(&config.src) {
137 info.sha.trim().to_owned()
143 eprintln!("error: could not find commit hash for downloading LLVM");
144 eprintln!("help: maybe your repository history is too shallow?");
145 eprintln!("help: consider disabling `download-ci-llvm`");
146 eprintln!("help: or fetch enough history to include one upstream commit");
153 /// Returns whether the CI-found LLVM is currently usable.
155 /// This checks both the build triple platform to confirm we're usable at all,
156 /// and then verifies if the current HEAD matches the detected LLVM SHA head,
157 /// in which case LLVM is indicated as not available.
158 pub(crate) fn is_ci_llvm_available(config: &Config, asserts: bool) -> bool {
159 // This is currently all tier 1 targets and tier 2 targets with host tools
160 // (since others may not have CI artifacts)
161 // https://doc.rust-lang.org/rustc/platform-support.html#tier-1
162 let supported_platforms = [
164 "aarch64-unknown-linux-gnu",
165 "i686-pc-windows-gnu",
166 "i686-pc-windows-msvc",
167 "i686-unknown-linux-gnu",
168 "x86_64-unknown-linux-gnu",
169 "x86_64-apple-darwin",
170 "x86_64-pc-windows-gnu",
171 "x86_64-pc-windows-msvc",
172 // tier 2 with host tools
173 "aarch64-apple-darwin",
174 "aarch64-pc-windows-msvc",
175 "aarch64-unknown-linux-musl",
176 "arm-unknown-linux-gnueabi",
177 "arm-unknown-linux-gnueabihf",
178 "armv7-unknown-linux-gnueabihf",
179 "mips-unknown-linux-gnu",
180 "mips64-unknown-linux-gnuabi64",
181 "mips64el-unknown-linux-gnuabi64",
182 "mipsel-unknown-linux-gnu",
183 "powerpc-unknown-linux-gnu",
184 "powerpc64-unknown-linux-gnu",
185 "powerpc64le-unknown-linux-gnu",
186 "riscv64gc-unknown-linux-gnu",
187 "s390x-unknown-linux-gnu",
188 "x86_64-unknown-freebsd",
189 "x86_64-unknown-illumos",
190 "x86_64-unknown-linux-musl",
191 "x86_64-unknown-netbsd",
193 if !supported_platforms.contains(&&*config.build.triple) {
197 let triple = &*config.build.triple;
198 if (triple == "aarch64-unknown-linux-gnu" || triple.contains("i686")) && asserts {
199 // No alt builder for aarch64-unknown-linux-gnu today.
203 if crate::util::CiEnv::is_ci() {
204 // We assume we have access to git, so it's okay to unconditionally pass
206 let llvm_sha = detect_llvm_sha(config, true);
207 let head_sha = output(config.git().arg("rev-parse").arg("HEAD"));
208 let head_sha = head_sha.trim();
209 if llvm_sha == head_sha {
211 "Detected LLVM as non-available: running in CI and modified LLVM in this change"
220 #[derive(Debug, Copy, Clone, Hash, PartialEq, Eq)]
222 pub target: TargetSelection,
226 type Output = PathBuf; // path to llvm-config
228 const ONLY_HOSTS: bool = true;
230 fn should_run(run: ShouldRun<'_>) -> ShouldRun<'_> {
231 run.path("src/llvm-project").path("src/llvm-project/llvm")
234 fn make_run(run: RunConfig<'_>) {
235 run.builder.ensure(Llvm { target: run.target });
238 /// Compile LLVM for `target`.
239 fn run(self, builder: &Builder<'_>) -> PathBuf {
240 let target = self.target;
241 let target_native = if self.target.starts_with("riscv") {
242 // RISC-V target triples in Rust is not named the same as C compiler target triples.
243 // This converts Rust RISC-V target triples to C compiler triples.
244 let idx = target.triple.find('-').unwrap();
246 format!("riscv{}{}", &target.triple[5..7], &target.triple[idx..])
247 } else if self.target.starts_with("powerpc") && self.target.ends_with("freebsd") {
248 // FreeBSD 13 had incompatible ABI changes on all PowerPC platforms.
249 // Set the version suffix to 13.0 so the correct target details are used.
250 format!("{}{}", self.target, "13.0")
255 let Meta { stamp, build_llvm_config, out_dir, root } =
256 match prebuilt_llvm_config(builder, target) {
261 builder.update_submodule(&Path::new("src").join("llvm-project"));
262 if builder.llvm_link_shared() && target.contains("windows") {
263 panic!("shared linking to LLVM is not currently supported on {}", target.triple);
266 builder.info(&format!("Building LLVM for {}", target));
268 let _time = util::timeit(&builder);
269 t!(fs::create_dir_all(&out_dir));
271 // https://llvm.org/docs/CMake.html
272 let mut cfg = cmake::Config::new(builder.src.join(root));
273 let mut ldflags = LdFlags::default();
275 let profile = match (builder.config.llvm_optimize, builder.config.llvm_release_debuginfo) {
276 (false, _) => "Debug",
277 (true, false) => "Release",
278 (true, true) => "RelWithDebInfo",
281 // NOTE: remember to also update `config.toml.example` when changing the
283 let llvm_targets = match &builder.config.llvm_targets {
286 "AArch64;ARM;BPF;Hexagon;MSP430;Mips;NVPTX;PowerPC;RISCV;\
287 Sparc;SystemZ;WebAssembly;X86"
291 let llvm_exp_targets = match builder.config.llvm_experimental_targets {
296 let assertions = if builder.config.llvm_assertions { "ON" } else { "OFF" };
297 let plugins = if builder.config.llvm_plugins { "ON" } else { "OFF" };
298 let enable_tests = if builder.config.llvm_tests { "ON" } else { "OFF" };
300 cfg.out_dir(&out_dir)
302 .define("LLVM_ENABLE_ASSERTIONS", assertions)
303 .define("LLVM_ENABLE_PLUGINS", plugins)
304 .define("LLVM_TARGETS_TO_BUILD", llvm_targets)
305 .define("LLVM_EXPERIMENTAL_TARGETS_TO_BUILD", llvm_exp_targets)
306 .define("LLVM_INCLUDE_EXAMPLES", "OFF")
307 .define("LLVM_INCLUDE_DOCS", "OFF")
308 .define("LLVM_INCLUDE_BENCHMARKS", "OFF")
309 .define("LLVM_INCLUDE_TESTS", enable_tests)
310 .define("LLVM_ENABLE_TERMINFO", "OFF")
311 .define("LLVM_ENABLE_LIBEDIT", "OFF")
312 .define("LLVM_ENABLE_BINDINGS", "OFF")
313 .define("LLVM_ENABLE_Z3_SOLVER", "OFF")
314 .define("LLVM_PARALLEL_COMPILE_JOBS", builder.jobs().to_string())
315 .define("LLVM_TARGET_ARCH", target_native.split('-').next().unwrap())
316 .define("LLVM_DEFAULT_TARGET_TRIPLE", target_native);
318 // Parts of our test suite rely on the `FileCheck` tool, which is built by default in
319 // `build/$TARGET/llvm/build/bin` is but *not* then installed to `build/$TARGET/llvm/bin`.
320 // This flag makes sure `FileCheck` is copied in the final binaries directory.
321 cfg.define("LLVM_INSTALL_UTILS", "ON");
323 if builder.config.llvm_profile_generate {
324 cfg.define("LLVM_BUILD_INSTRUMENTED", "IR");
325 if let Ok(llvm_profile_dir) = std::env::var("LLVM_PROFILE_DIR") {
326 cfg.define("LLVM_PROFILE_DATA_DIR", llvm_profile_dir);
328 cfg.define("LLVM_BUILD_RUNTIME", "No");
330 if let Some(path) = builder.config.llvm_profile_use.as_ref() {
331 cfg.define("LLVM_PROFDATA_FILE", &path);
333 if builder.config.llvm_bolt_profile_generate
334 || builder.config.llvm_bolt_profile_use.is_some()
336 // Relocations are required for BOLT to work.
337 ldflags.push_all("-Wl,-q");
340 // Disable zstd to avoid a dependency on libzstd.so.
341 cfg.define("LLVM_ENABLE_ZSTD", "OFF");
343 if target != "aarch64-apple-darwin" && !target.contains("windows") {
344 cfg.define("LLVM_ENABLE_ZLIB", "ON");
346 cfg.define("LLVM_ENABLE_ZLIB", "OFF");
349 // Are we compiling for iOS/tvOS/watchOS?
350 if target.contains("apple-ios")
351 || target.contains("apple-tvos")
352 || target.contains("apple-watchos")
354 // These two defines prevent CMake from automatically trying to add a MacOSX sysroot, which leads to a compiler error.
355 cfg.define("CMAKE_OSX_SYSROOT", "/");
356 cfg.define("CMAKE_OSX_DEPLOYMENT_TARGET", "");
357 // Prevent cmake from adding -bundle to CFLAGS automatically, which leads to a compiler error because "-bitcode_bundle" also gets added.
358 cfg.define("LLVM_ENABLE_PLUGINS", "OFF");
359 // Zlib fails to link properly, leading to a compiler error.
360 cfg.define("LLVM_ENABLE_ZLIB", "OFF");
363 // This setting makes the LLVM tools link to the dynamic LLVM library,
364 // which saves both memory during parallel links and overall disk space
365 // for the tools. We don't do this on every platform as it doesn't work
366 // equally well everywhere.
367 if builder.llvm_link_shared() {
368 cfg.define("LLVM_LINK_LLVM_DYLIB", "ON");
371 if target.starts_with("riscv") && !target.contains("freebsd") && !target.contains("openbsd")
373 // RISC-V GCC erroneously requires linking against
374 // `libatomic` when using 1-byte and 2-byte C++
375 // atomics but the LLVM build system check cannot
376 // detect this. Therefore it is set manually here.
377 // Some BSD uses Clang as its system compiler and
378 // provides no libatomic in its base system so does
380 ldflags.exe.push(" -latomic");
381 ldflags.shared.push(" -latomic");
384 if target.contains("msvc") {
385 cfg.define("LLVM_USE_CRT_DEBUG", "MT");
386 cfg.define("LLVM_USE_CRT_RELEASE", "MT");
387 cfg.define("LLVM_USE_CRT_RELWITHDEBINFO", "MT");
388 cfg.static_crt(true);
391 if target.starts_with("i686") {
392 cfg.define("LLVM_BUILD_32_BITS", "ON");
395 let mut enabled_llvm_projects = Vec::new();
397 if util::forcing_clang_based_tests() {
398 enabled_llvm_projects.push("clang");
399 enabled_llvm_projects.push("compiler-rt");
402 if builder.config.llvm_polly {
403 enabled_llvm_projects.push("polly");
406 if builder.config.llvm_clang {
407 enabled_llvm_projects.push("clang");
410 // We want libxml to be disabled.
411 // See https://github.com/rust-lang/rust/pull/50104
412 cfg.define("LLVM_ENABLE_LIBXML2", "OFF");
414 if !enabled_llvm_projects.is_empty() {
415 enabled_llvm_projects.sort();
416 enabled_llvm_projects.dedup();
417 cfg.define("LLVM_ENABLE_PROJECTS", enabled_llvm_projects.join(";"));
420 if let Some(num_linkers) = builder.config.llvm_link_jobs {
422 cfg.define("LLVM_PARALLEL_LINK_JOBS", num_linkers.to_string());
426 // Workaround for ppc32 lld limitation
427 if target == "powerpc-unknown-freebsd" {
428 ldflags.exe.push(" -fuse-ld=bfd");
431 // https://llvm.org/docs/HowToCrossCompileLLVM.html
432 if target != builder.config.build {
433 let llvm_config = builder.ensure(Llvm { target: builder.config.build });
434 if !builder.config.dry_run() {
435 let llvm_bindir = output(Command::new(&llvm_config).arg("--bindir"));
436 let host_bin = Path::new(llvm_bindir.trim());
439 host_bin.join("llvm-tblgen").with_extension(EXE_EXTENSION),
441 // LLVM_NM is required for cross compiling using MSVC
442 cfg.define("LLVM_NM", host_bin.join("llvm-nm").with_extension(EXE_EXTENSION));
444 cfg.define("LLVM_CONFIG_PATH", llvm_config);
445 if builder.config.llvm_clang {
446 let build_bin = builder.llvm_out(builder.config.build).join("build").join("bin");
447 let clang_tblgen = build_bin.join("clang-tblgen").with_extension(EXE_EXTENSION);
448 if !builder.config.dry_run() && !clang_tblgen.exists() {
449 panic!("unable to find {}", clang_tblgen.display());
451 cfg.define("CLANG_TABLEGEN", clang_tblgen);
455 let llvm_version_suffix = if let Some(ref suffix) = builder.config.llvm_version_suffix {
456 // Allow version-suffix="" to not define a version suffix at all.
457 if !suffix.is_empty() { Some(suffix.to_string()) } else { None }
458 } else if builder.config.channel == "dev" {
459 // Changes to a version suffix require a complete rebuild of the LLVM.
460 // To avoid rebuilds during a time of version bump, don't include rustc
461 // release number on the dev channel.
462 Some("-rust-dev".to_string())
464 Some(format!("-rust-{}-{}", builder.version, builder.config.channel))
466 if let Some(ref suffix) = llvm_version_suffix {
467 cfg.define("LLVM_VERSION_SUFFIX", suffix);
470 configure_cmake(builder, target, &mut cfg, true, ldflags);
471 configure_llvm(builder, target, &mut cfg);
473 for (key, val) in &builder.config.llvm_build_config {
474 cfg.define(key, val);
477 // FIXME: we don't actually need to build all LLVM tools and all LLVM
478 // libraries here, e.g., we just want a few components and a few
479 // tools. Figure out how to filter them down and only build the right
480 // tools and libs on all platforms.
482 if builder.config.dry_run() {
483 return build_llvm_config;
488 // When building LLVM with LLVM_LINK_LLVM_DYLIB for macOS, an unversioned
489 // libLLVM.dylib will be built. However, llvm-config will still look
490 // for a versioned path like libLLVM-14.dylib. Manually create a symbolic
491 // link to make llvm-config happy.
492 if builder.llvm_link_shared() && target.contains("apple-darwin") {
493 let mut cmd = Command::new(&build_llvm_config);
494 let version = output(cmd.arg("--version"));
495 let major = version.split('.').next().unwrap();
496 let lib_name = match llvm_version_suffix {
497 Some(s) => format!("libLLVM-{}{}.dylib", major, s),
498 None => format!("libLLVM-{}.dylib", major),
501 let lib_llvm = out_dir.join("build").join("lib").join(lib_name);
502 if !lib_llvm.exists() {
503 t!(builder.symlink_file("libLLVM.dylib", &lib_llvm));
507 // After LLVM is built, we modify (instrument or optimize) the libLLVM.so library file
508 // in place. This is fine, because currently we do not support incrementally rebuilding
509 // LLVM after a configuration change, so to rebuild it the build files have to be removed,
510 // which will also remove these modified files.
511 if builder.config.llvm_bolt_profile_generate {
512 instrument_with_bolt_inplace(&get_built_llvm_lib_path(&build_llvm_config));
514 if let Some(path) = &builder.config.llvm_bolt_profile_use {
515 optimize_library_with_bolt_inplace(
516 &get_built_llvm_lib_path(&build_llvm_config),
527 /// Returns path to a built LLVM library (libLLVM.so).
528 /// Assumes that we have built LLVM into a single library file.
529 fn get_built_llvm_lib_path(llvm_config_path: &Path) -> PathBuf {
530 let mut cmd = Command::new(llvm_config_path);
531 cmd.arg("--libfiles");
532 PathBuf::from(output(&mut cmd).trim())
535 fn check_llvm_version(builder: &Builder<'_>, llvm_config: &Path) {
536 if !builder.config.llvm_version_check {
540 if builder.config.dry_run() {
544 let mut cmd = Command::new(llvm_config);
545 let version = output(cmd.arg("--version"));
546 let mut parts = version.split('.').take(2).filter_map(|s| s.parse::<u32>().ok());
547 if let (Some(major), Some(_minor)) = (parts.next(), parts.next()) {
552 panic!("\n\nbad LLVM version: {}, need >=13.0\n\n", version)
556 builder: &Builder<'_>,
557 target: TargetSelection,
558 cfg: &mut cmake::Config,
559 use_compiler_launcher: bool,
560 mut ldflags: LdFlags,
562 // Do not print installation messages for up-to-date files.
563 // LLVM and LLD builds can produce a lot of those and hit CI limits on log size.
564 cfg.define("CMAKE_INSTALL_MESSAGE", "LAZY");
566 // Do not allow the user's value of DESTDIR to influence where
567 // LLVM will install itself. LLVM must always be installed in our
568 // own build directories.
569 cfg.env("DESTDIR", "");
572 cfg.generator("Ninja");
574 cfg.target(&target.triple).host(&builder.config.build.triple);
576 if target != builder.config.build {
577 cfg.define("CMAKE_CROSSCOMPILING", "True");
579 if target.contains("netbsd") {
580 cfg.define("CMAKE_SYSTEM_NAME", "NetBSD");
581 } else if target.contains("freebsd") {
582 cfg.define("CMAKE_SYSTEM_NAME", "FreeBSD");
583 } else if target.contains("windows") {
584 cfg.define("CMAKE_SYSTEM_NAME", "Windows");
585 } else if target.contains("haiku") {
586 cfg.define("CMAKE_SYSTEM_NAME", "Haiku");
587 } else if target.contains("solaris") || target.contains("illumos") {
588 cfg.define("CMAKE_SYSTEM_NAME", "SunOS");
590 // When cross-compiling we should also set CMAKE_SYSTEM_VERSION, but in
591 // that case like CMake we cannot easily determine system version either.
593 // Since, the LLVM itself makes rather limited use of version checks in
594 // CMakeFiles (and then only in tests), and so far no issues have been
595 // reported, the system version is currently left unset.
597 if target.contains("darwin") {
598 // Make sure that CMake does not build universal binaries on macOS.
599 // Explicitly specify the one single target architecture.
600 if target.starts_with("aarch64") {
601 // macOS uses a different name for building arm64
602 cfg.define("CMAKE_OSX_ARCHITECTURES", "arm64");
603 } else if target.starts_with("i686") {
604 // macOS uses a different name for building i386
605 cfg.define("CMAKE_OSX_ARCHITECTURES", "i386");
607 cfg.define("CMAKE_OSX_ARCHITECTURES", target.triple.split('-').next().unwrap());
612 let sanitize_cc = |cc: &Path| {
613 if target.contains("msvc") {
614 OsString::from(cc.to_str().unwrap().replace("\\", "/"))
616 cc.as_os_str().to_owned()
620 // MSVC with CMake uses msbuild by default which doesn't respect these
621 // vars that we'd otherwise configure. In that case we just skip this
623 if target.contains("msvc") && !builder.ninja() {
627 let (cc, cxx) = match builder.config.llvm_clang_cl {
628 Some(ref cl) => (cl.as_ref(), cl.as_ref()),
629 None => (builder.cc(target), builder.cxx(target).unwrap()),
632 // Handle msvc + ninja + ccache specially (this is what the bots use)
633 if target.contains("msvc") && builder.ninja() && builder.config.ccache.is_some() {
634 let mut wrap_cc = env::current_exe().expect("failed to get cwd");
635 wrap_cc.set_file_name("sccache-plus-cl.exe");
637 cfg.define("CMAKE_C_COMPILER", sanitize_cc(&wrap_cc))
638 .define("CMAKE_CXX_COMPILER", sanitize_cc(&wrap_cc));
639 cfg.env("SCCACHE_PATH", builder.config.ccache.as_ref().unwrap())
640 .env("SCCACHE_TARGET", target.triple)
641 .env("SCCACHE_CC", &cc)
642 .env("SCCACHE_CXX", &cxx);
644 // Building LLVM on MSVC can be a little ludicrous at times. We're so far
645 // off the beaten path here that I'm not really sure this is even half
646 // supported any more. Here we're trying to:
648 // * Build LLVM on MSVC
649 // * Build LLVM with `clang-cl` instead of `cl.exe`
650 // * Build a project with `sccache`
651 // * Build for 32-bit as well
652 // * Build with Ninja
654 // For `cl.exe` there are different binaries to compile 32/64 bit which
655 // we use but for `clang-cl` there's only one which internally
656 // multiplexes via flags. As a result it appears that CMake's detection
657 // of a compiler's architecture and such on MSVC **doesn't** pass any
658 // custom flags we pass in CMAKE_CXX_FLAGS below. This means that if we
659 // use `clang-cl.exe` it's always diagnosed as a 64-bit compiler which
660 // definitely causes problems since all the env vars are pointing to
663 // To hack around this... again... we pass an argument that's
664 // unconditionally passed in the sccache shim. This'll get CMake to
665 // correctly diagnose it's doing a 32-bit compilation and LLVM will
666 // internally configure itself appropriately.
667 if builder.config.llvm_clang_cl.is_some() && target.contains("i686") {
668 cfg.env("SCCACHE_EXTRA_ARGS", "-m32");
671 // If ccache is configured we inform the build a little differently how
672 // to invoke ccache while also invoking our compilers.
673 if use_compiler_launcher {
674 if let Some(ref ccache) = builder.config.ccache {
675 cfg.define("CMAKE_C_COMPILER_LAUNCHER", ccache)
676 .define("CMAKE_CXX_COMPILER_LAUNCHER", ccache);
679 cfg.define("CMAKE_C_COMPILER", sanitize_cc(cc))
680 .define("CMAKE_CXX_COMPILER", sanitize_cc(cxx))
681 .define("CMAKE_ASM_COMPILER", sanitize_cc(cc));
684 cfg.build_arg("-j").build_arg(builder.jobs().to_string());
685 let mut cflags: OsString = builder.cflags(target, GitRepo::Llvm, CLang::C).join(" ").into();
686 if let Some(ref s) = builder.config.llvm_cflags {
690 // Some compiler features used by LLVM (such as thread locals) will not work on a min version below iOS 10.
691 if target.contains("apple-ios") {
692 if target.contains("86-") {
693 cflags.push(" -miphonesimulator-version-min=10.0");
695 cflags.push(" -miphoneos-version-min=10.0");
698 if builder.config.llvm_clang_cl.is_some() {
699 cflags.push(&format!(" --target={}", target));
701 cfg.define("CMAKE_C_FLAGS", cflags);
702 let mut cxxflags: OsString = builder.cflags(target, GitRepo::Llvm, CLang::Cxx).join(" ").into();
703 if let Some(ref s) = builder.config.llvm_cxxflags {
707 if builder.config.llvm_clang_cl.is_some() {
708 cxxflags.push(&format!(" --target={}", target));
710 cfg.define("CMAKE_CXX_FLAGS", cxxflags);
711 if let Some(ar) = builder.ar(target) {
712 if ar.is_absolute() {
713 // LLVM build breaks if `CMAKE_AR` is a relative path, for some reason it
714 // tries to resolve this path in the LLVM build directory.
715 cfg.define("CMAKE_AR", sanitize_cc(ar));
719 if let Some(ranlib) = builder.ranlib(target) {
720 if ranlib.is_absolute() {
721 // LLVM build breaks if `CMAKE_RANLIB` is a relative path, for some reason it
722 // tries to resolve this path in the LLVM build directory.
723 cfg.define("CMAKE_RANLIB", sanitize_cc(ranlib));
727 if let Some(ref flags) = builder.config.llvm_ldflags {
728 ldflags.push_all(flags);
731 if let Some(flags) = get_var("LDFLAGS", &builder.config.build.triple, &target.triple) {
732 ldflags.push_all(&flags);
735 // For distribution we want the LLVM tools to be *statically* linked to libstdc++.
736 // We also do this if the user explicitly requested static libstdc++.
737 if builder.config.llvm_static_stdcpp {
738 if !target.contains("msvc") && !target.contains("netbsd") && !target.contains("solaris") {
739 if target.contains("apple") || target.contains("windows") {
740 ldflags.push_all("-static-libstdc++");
742 ldflags.push_all("-Wl,-Bsymbolic -static-libstdc++");
747 cfg.define("CMAKE_SHARED_LINKER_FLAGS", &ldflags.shared);
748 cfg.define("CMAKE_MODULE_LINKER_FLAGS", &ldflags.module);
749 cfg.define("CMAKE_EXE_LINKER_FLAGS", &ldflags.exe);
751 if env::var_os("SCCACHE_ERROR_LOG").is_some() {
752 cfg.env("RUSTC_LOG", "sccache=warn");
756 fn configure_llvm(builder: &Builder<'_>, target: TargetSelection, cfg: &mut cmake::Config) {
757 // ThinLTO is only available when building with LLVM, enabling LLD is required.
758 // Apple's linker ld64 supports ThinLTO out of the box though, so don't use LLD on Darwin.
759 if builder.config.llvm_thin_lto {
760 cfg.define("LLVM_ENABLE_LTO", "Thin");
761 if !target.contains("apple") {
762 cfg.define("LLVM_ENABLE_LLD", "ON");
766 if let Some(ref linker) = builder.config.llvm_use_linker {
767 cfg.define("LLVM_USE_LINKER", linker);
770 if builder.config.llvm_allow_old_toolchain {
771 cfg.define("LLVM_TEMPORARILY_ALLOW_OLD_TOOLCHAIN", "YES");
775 // Adapted from https://github.com/alexcrichton/cc-rs/blob/fba7feded71ee4f63cfe885673ead6d7b4f2f454/src/lib.rs#L2347-L2365
776 fn get_var(var_base: &str, host: &str, target: &str) -> Option<OsString> {
777 let kind = if host == target { "HOST" } else { "TARGET" };
778 let target_u = target.replace("-", "_");
779 env::var_os(&format!("{}_{}", var_base, target))
780 .or_else(|| env::var_os(&format!("{}_{}", var_base, target_u)))
781 .or_else(|| env::var_os(&format!("{}_{}", kind, var_base)))
782 .or_else(|| env::var_os(var_base))
785 #[derive(Debug, Copy, Clone, Hash, PartialEq, Eq)]
787 pub target: TargetSelection,
791 type Output = PathBuf;
792 const ONLY_HOSTS: bool = true;
794 fn should_run(run: ShouldRun<'_>) -> ShouldRun<'_> {
795 run.path("src/llvm-project/lld")
798 fn make_run(run: RunConfig<'_>) {
799 run.builder.ensure(Lld { target: run.target });
802 /// Compile LLD for `target`.
803 fn run(self, builder: &Builder<'_>) -> PathBuf {
804 if builder.config.dry_run() {
805 return PathBuf::from("lld-out-dir-test-gen");
807 let target = self.target;
809 let llvm_config = builder.ensure(Llvm { target: self.target });
811 let out_dir = builder.lld_out(target);
812 let done_stamp = out_dir.join("lld-finished-building");
813 if done_stamp.exists() {
817 builder.info(&format!("Building LLD for {}", target));
818 let _time = util::timeit(&builder);
819 t!(fs::create_dir_all(&out_dir));
821 let mut cfg = cmake::Config::new(builder.src.join("src/llvm-project/lld"));
822 let mut ldflags = LdFlags::default();
824 // When building LLD as part of a build with instrumentation on windows, for example
825 // when doing PGO on CI, cmake or clang-cl don't automatically link clang's
826 // profiler runtime in. In that case, we need to manually ask cmake to do it, to avoid
827 // linking errors, much like LLVM's cmake setup does in that situation.
828 if builder.config.llvm_profile_generate && target.contains("msvc") {
829 if let Some(clang_cl_path) = builder.config.llvm_clang_cl.as_ref() {
830 // Find clang's runtime library directory and push that as a search path to the
831 // cmake linker flags.
832 let clang_rt_dir = get_clang_cl_resource_dir(clang_cl_path);
833 ldflags.push_all(&format!("/libpath:{}", clang_rt_dir.display()));
837 configure_cmake(builder, target, &mut cfg, true, ldflags);
838 configure_llvm(builder, target, &mut cfg);
840 // This is an awful, awful hack. Discovered when we migrated to using
841 // clang-cl to compile LLVM/LLD it turns out that LLD, when built out of
842 // tree, will execute `llvm-config --cmakedir` and then tell CMake about
843 // that directory for later processing. Unfortunately if this path has
844 // forward slashes in it (which it basically always does on Windows)
845 // then CMake will hit a syntax error later on as... something isn't
848 // Instead of attempting to fix this problem in upstream CMake and/or
849 // LLVM/LLD we just hack around it here. This thin wrapper will take the
850 // output from llvm-config and replace all instances of `\` with `/` to
851 // ensure we don't hit the same bugs with escaping. It means that you
852 // can't build on a system where your paths require `\` on Windows, but
853 // there's probably a lot of reasons you can't do that other than this.
854 let llvm_config_shim = env::current_exe().unwrap().with_file_name("llvm-config-wrapper");
856 // Re-use the same flags as llvm to control the level of debug information
857 // generated for lld.
858 let profile = match (builder.config.llvm_optimize, builder.config.llvm_release_debuginfo) {
859 (false, _) => "Debug",
860 (true, false) => "Release",
861 (true, true) => "RelWithDebInfo",
864 cfg.out_dir(&out_dir)
866 .env("LLVM_CONFIG_REAL", &llvm_config)
867 .define("LLVM_CONFIG_PATH", llvm_config_shim)
868 .define("LLVM_INCLUDE_TESTS", "OFF");
870 // While we're using this horrible workaround to shim the execution of
871 // llvm-config, let's just pile on more. I can't seem to figure out how
872 // to build LLD as a standalone project and also cross-compile it at the
873 // same time. It wants a natively executable `llvm-config` to learn
874 // about LLVM, but then it learns about all the host configuration of
875 // LLVM and tries to link to host LLVM libraries.
877 // To work around that we tell our shim to replace anything with the
878 // build target with the actual target instead. This'll break parts of
879 // LLD though which try to execute host tools, such as llvm-tblgen, so
880 // we specifically tell it where to find those. This is likely super
881 // brittle and will break over time. If anyone knows better how to
882 // cross-compile LLD it would be much appreciated to fix this!
883 if target != builder.config.build {
884 cfg.env("LLVM_CONFIG_SHIM_REPLACE", &builder.config.build.triple)
885 .env("LLVM_CONFIG_SHIM_REPLACE_WITH", &target.triple)
888 llvm_config.with_file_name("llvm-tblgen").with_extension(EXE_EXTENSION),
892 // Explicitly set C++ standard, because upstream doesn't do so
893 // for standalone builds.
894 cfg.define("CMAKE_CXX_STANDARD", "14");
898 t!(File::create(&done_stamp));
903 #[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
904 pub struct TestHelpers {
905 pub target: TargetSelection,
908 impl Step for TestHelpers {
911 fn should_run(run: ShouldRun<'_>) -> ShouldRun<'_> {
912 run.path("src/test/auxiliary/rust_test_helpers.c")
915 fn make_run(run: RunConfig<'_>) {
916 run.builder.ensure(TestHelpers { target: run.target })
919 /// Compiles the `rust_test_helpers.c` library which we used in various
920 /// `run-pass` tests for ABI testing.
921 fn run(self, builder: &Builder<'_>) {
922 if builder.config.dry_run() {
925 // The x86_64-fortanix-unknown-sgx target doesn't have a working C
926 // toolchain. However, some x86_64 ELF objects can be linked
927 // without issues. Use this hack to compile the test helpers.
928 let target = if self.target == "x86_64-fortanix-unknown-sgx" {
929 TargetSelection::from_user("x86_64-unknown-linux-gnu")
933 let dst = builder.test_helpers_out(target);
934 let src = builder.src.join("src/test/auxiliary/rust_test_helpers.c");
935 if up_to_date(&src, &dst.join("librust_test_helpers.a")) {
939 builder.info("Building test helpers");
940 t!(fs::create_dir_all(&dst));
941 let mut cfg = cc::Build::new();
942 // FIXME: Workaround for https://github.com/emscripten-core/emscripten/issues/9013
943 if target.contains("emscripten") {
947 // We may have found various cross-compilers a little differently due to our
948 // extra configuration, so inform cc of these compilers. Note, though, that
949 // on MSVC we still need cc's detection of env vars (ugh).
950 if !target.contains("msvc") {
951 if let Some(ar) = builder.ar(target) {
954 cfg.compiler(builder.cc(target));
956 cfg.cargo_metadata(false)
958 .target(&target.triple)
959 .host(&builder.config.build.triple)
963 .file(builder.src.join("src/test/auxiliary/rust_test_helpers.c"))
964 .compile("rust_test_helpers");
968 #[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
969 pub struct Sanitizers {
970 pub target: TargetSelection,
973 impl Step for Sanitizers {
974 type Output = Vec<SanitizerRuntime>;
976 fn should_run(run: ShouldRun<'_>) -> ShouldRun<'_> {
977 run.alias("sanitizers")
980 fn make_run(run: RunConfig<'_>) {
981 run.builder.ensure(Sanitizers { target: run.target });
984 /// Builds sanitizer runtime libraries.
985 fn run(self, builder: &Builder<'_>) -> Self::Output {
986 let compiler_rt_dir = builder.src.join("src/llvm-project/compiler-rt");
987 if !compiler_rt_dir.exists() {
991 let out_dir = builder.native_dir(self.target).join("sanitizers");
992 let runtimes = supported_sanitizers(&out_dir, self.target, &builder.config.channel);
993 if runtimes.is_empty() {
997 let llvm_config = builder.ensure(Llvm { target: builder.config.build });
998 if builder.config.dry_run() {
1002 let stamp = out_dir.join("sanitizers-finished-building");
1003 let stamp = HashStamp::new(stamp, builder.in_tree_llvm_info.sha());
1005 if stamp.is_done() {
1006 if stamp.hash.is_none() {
1007 builder.info(&format!(
1008 "Rebuild sanitizers by removing the file `{}`",
1009 stamp.path.display()
1015 builder.info(&format!("Building sanitizers for {}", self.target));
1017 let _time = util::timeit(&builder);
1019 let mut cfg = cmake::Config::new(&compiler_rt_dir);
1020 cfg.profile("Release");
1021 cfg.define("CMAKE_C_COMPILER_TARGET", self.target.triple);
1022 cfg.define("COMPILER_RT_BUILD_BUILTINS", "OFF");
1023 cfg.define("COMPILER_RT_BUILD_CRT", "OFF");
1024 cfg.define("COMPILER_RT_BUILD_LIBFUZZER", "OFF");
1025 cfg.define("COMPILER_RT_BUILD_PROFILE", "OFF");
1026 cfg.define("COMPILER_RT_BUILD_SANITIZERS", "ON");
1027 cfg.define("COMPILER_RT_BUILD_XRAY", "OFF");
1028 cfg.define("COMPILER_RT_DEFAULT_TARGET_ONLY", "ON");
1029 cfg.define("COMPILER_RT_USE_LIBCXX", "OFF");
1030 cfg.define("LLVM_CONFIG_PATH", &llvm_config);
1032 // On Darwin targets the sanitizer runtimes are build as universal binaries.
1033 // Unfortunately sccache currently lacks support to build them successfully.
1034 // Disable compiler launcher on Darwin targets to avoid potential issues.
1035 let use_compiler_launcher = !self.target.contains("apple-darwin");
1036 configure_cmake(builder, self.target, &mut cfg, use_compiler_launcher, LdFlags::default());
1038 t!(fs::create_dir_all(&out_dir));
1039 cfg.out_dir(out_dir);
1041 for runtime in &runtimes {
1042 cfg.build_target(&runtime.cmake_target);
1051 #[derive(Clone, Debug)]
1052 pub struct SanitizerRuntime {
1053 /// CMake target used to build the runtime.
1054 pub cmake_target: String,
1055 /// Path to the built runtime library.
1057 /// Library filename that will be used rustc.
1061 /// Returns sanitizers available on a given target.
1062 fn supported_sanitizers(
1064 target: TargetSelection,
1066 ) -> Vec<SanitizerRuntime> {
1067 let darwin_libs = |os: &str, components: &[&str]| -> Vec<SanitizerRuntime> {
1070 .map(move |c| SanitizerRuntime {
1071 cmake_target: format!("clang_rt.{}_{}_dynamic", c, os),
1073 .join(&format!("build/lib/darwin/libclang_rt.{}_{}_dynamic.dylib", c, os)),
1074 name: format!("librustc-{}_rt.{}.dylib", channel, c),
1079 let common_libs = |os: &str, arch: &str, components: &[&str]| -> Vec<SanitizerRuntime> {
1082 .map(move |c| SanitizerRuntime {
1083 cmake_target: format!("clang_rt.{}-{}", c, arch),
1084 path: out_dir.join(&format!("build/lib/{}/libclang_rt.{}-{}.a", os, c, arch)),
1085 name: format!("librustc-{}_rt.{}.a", channel, c),
1090 match &*target.triple {
1091 "aarch64-apple-darwin" => darwin_libs("osx", &["asan", "lsan", "tsan"]),
1092 "aarch64-fuchsia" => common_libs("fuchsia", "aarch64", &["asan"]),
1093 "aarch64-unknown-linux-gnu" => {
1094 common_libs("linux", "aarch64", &["asan", "lsan", "msan", "tsan", "hwasan"])
1096 "x86_64-apple-darwin" => darwin_libs("osx", &["asan", "lsan", "tsan"]),
1097 "x86_64-fuchsia" => common_libs("fuchsia", "x86_64", &["asan"]),
1098 "x86_64-unknown-freebsd" => common_libs("freebsd", "x86_64", &["asan", "msan", "tsan"]),
1099 "x86_64-unknown-netbsd" => {
1100 common_libs("netbsd", "x86_64", &["asan", "lsan", "msan", "tsan"])
1102 "x86_64-unknown-illumos" => common_libs("illumos", "x86_64", &["asan"]),
1103 "x86_64-pc-solaris" => common_libs("solaris", "x86_64", &["asan"]),
1104 "x86_64-unknown-linux-gnu" => {
1105 common_libs("linux", "x86_64", &["asan", "lsan", "msan", "tsan"])
1107 "x86_64-unknown-linux-musl" => {
1108 common_libs("linux", "x86_64", &["asan", "lsan", "msan", "tsan"])
1116 hash: Option<Vec<u8>>,
1120 fn new(path: PathBuf, hash: Option<&str>) -> Self {
1121 HashStamp { path, hash: hash.map(|s| s.as_bytes().to_owned()) }
1124 fn is_done(&self) -> bool {
1125 match fs::read(&self.path) {
1126 Ok(h) => self.hash.as_deref().unwrap_or(b"") == h.as_slice(),
1127 Err(e) if e.kind() == io::ErrorKind::NotFound => false,
1129 panic!("failed to read stamp file `{}`: {}", self.path.display(), e);
1134 fn remove(&self) -> io::Result<()> {
1135 match fs::remove_file(&self.path) {
1138 if e.kind() == io::ErrorKind::NotFound {
1147 fn write(&self) -> io::Result<()> {
1148 fs::write(&self.path, self.hash.as_deref().unwrap_or(b""))
1152 #[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
1153 pub struct CrtBeginEnd {
1154 pub target: TargetSelection,
1157 impl Step for CrtBeginEnd {
1158 type Output = PathBuf;
1160 fn should_run(run: ShouldRun<'_>) -> ShouldRun<'_> {
1161 run.path("src/llvm-project/compiler-rt/lib/crt")
1164 fn make_run(run: RunConfig<'_>) {
1165 run.builder.ensure(CrtBeginEnd { target: run.target });
1168 /// Build crtbegin.o/crtend.o for musl target.
1169 fn run(self, builder: &Builder<'_>) -> Self::Output {
1170 let out_dir = builder.native_dir(self.target).join("crt");
1172 if builder.config.dry_run() {
1176 let crtbegin_src = builder.src.join("src/llvm-project/compiler-rt/lib/crt/crtbegin.c");
1177 let crtend_src = builder.src.join("src/llvm-project/compiler-rt/lib/crt/crtend.c");
1178 if up_to_date(&crtbegin_src, &out_dir.join("crtbegin.o"))
1179 && up_to_date(&crtend_src, &out_dir.join("crtendS.o"))
1184 builder.info("Building crtbegin.o and crtend.o");
1185 t!(fs::create_dir_all(&out_dir));
1187 let mut cfg = cc::Build::new();
1189 if let Some(ar) = builder.ar(self.target) {
1192 cfg.compiler(builder.cc(self.target));
1193 cfg.cargo_metadata(false)
1195 .target(&self.target.triple)
1196 .host(&builder.config.build.triple)
1203 // Those flags are defined in src/llvm-project/compiler-rt/lib/crt/CMakeLists.txt
1204 // Currently only consumer of those objects is musl, which use .init_array/.fini_array
1205 // instead of .ctors/.dtors
1206 cfg.flag("-std=c11")
1207 .define("CRT_HAS_INITFINI_ARRAY", None)
1208 .define("EH_USE_FRAME_REGISTRY", None);
1212 t!(fs::copy(out_dir.join("crtbegin.o"), out_dir.join("crtbeginS.o")));
1213 t!(fs::copy(out_dir.join("crtend.o"), out_dir.join("crtendS.o")));
1218 #[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
1219 pub struct Libunwind {
1220 pub target: TargetSelection,
1223 impl Step for Libunwind {
1224 type Output = PathBuf;
1226 fn should_run(run: ShouldRun<'_>) -> ShouldRun<'_> {
1227 run.path("src/llvm-project/libunwind")
1230 fn make_run(run: RunConfig<'_>) {
1231 run.builder.ensure(Libunwind { target: run.target });
1234 /// Build linunwind.a
1235 fn run(self, builder: &Builder<'_>) -> Self::Output {
1236 if builder.config.dry_run() {
1237 return PathBuf::new();
1240 let out_dir = builder.native_dir(self.target).join("libunwind");
1241 let root = builder.src.join("src/llvm-project/libunwind");
1243 if up_to_date(&root, &out_dir.join("libunwind.a")) {
1247 builder.info(&format!("Building libunwind.a for {}", self.target.triple));
1248 t!(fs::create_dir_all(&out_dir));
1250 let mut cc_cfg = cc::Build::new();
1251 let mut cpp_cfg = cc::Build::new();
1254 cpp_cfg.cpp_set_stdlib(None);
1255 cpp_cfg.flag("-nostdinc++");
1256 cpp_cfg.flag("-fno-exceptions");
1257 cpp_cfg.flag("-fno-rtti");
1258 cpp_cfg.flag_if_supported("-fvisibility-global-new-delete-hidden");
1260 for cfg in [&mut cc_cfg, &mut cpp_cfg].iter_mut() {
1261 if let Some(ar) = builder.ar(self.target) {
1264 cfg.target(&self.target.triple);
1265 cfg.host(&builder.config.build.triple);
1266 cfg.warnings(false);
1268 // get_compiler() need set opt_level first.
1270 cfg.flag("-fstrict-aliasing");
1271 cfg.flag("-funwind-tables");
1272 cfg.flag("-fvisibility=hidden");
1273 cfg.define("_LIBUNWIND_DISABLE_VISIBILITY_ANNOTATIONS", None);
1274 cfg.include(root.join("include"));
1275 cfg.cargo_metadata(false);
1276 cfg.out_dir(&out_dir);
1278 if self.target.contains("x86_64-fortanix-unknown-sgx") {
1279 cfg.static_flag(true);
1280 cfg.flag("-fno-stack-protector");
1281 cfg.flag("-ffreestanding");
1282 cfg.flag("-fexceptions");
1284 // easiest way to undefine since no API available in cc::Build to undefine
1285 cfg.flag("-U_FORTIFY_SOURCE");
1286 cfg.define("_FORTIFY_SOURCE", "0");
1287 cfg.define("RUST_SGX", "1");
1288 cfg.define("__NO_STRING_INLINES", None);
1289 cfg.define("__NO_MATH_INLINES", None);
1290 cfg.define("_LIBUNWIND_IS_BAREMETAL", None);
1291 cfg.define("__LIBUNWIND_IS_NATIVE_ONLY", None);
1292 cfg.define("NDEBUG", None);
1294 if self.target.contains("windows") {
1295 cfg.define("_LIBUNWIND_HIDE_SYMBOLS", "1");
1296 cfg.define("_LIBUNWIND_IS_NATIVE_ONLY", "1");
1300 cc_cfg.compiler(builder.cc(self.target));
1301 if let Ok(cxx) = builder.cxx(self.target) {
1302 cpp_cfg.compiler(cxx);
1304 cc_cfg.compiler(builder.cc(self.target));
1307 // Don't set this for clang
1308 // By default, Clang builds C code in GNU C17 mode.
1309 // By default, Clang builds C++ code according to the C++98 standard,
1310 // with many C++11 features accepted as extensions.
1311 if cc_cfg.get_compiler().is_like_gnu() {
1312 cc_cfg.flag("-std=c99");
1314 if cpp_cfg.get_compiler().is_like_gnu() {
1315 cpp_cfg.flag("-std=c++11");
1318 if self.target.contains("x86_64-fortanix-unknown-sgx") || self.target.contains("musl") {
1319 // use the same GCC C compiler command to compile C++ code so we do not need to setup the
1320 // C++ compiler env variables on the builders.
1321 // Don't set this for clang++, as clang++ is able to compile this without libc++.
1322 if cpp_cfg.get_compiler().is_like_gnu() {
1324 cpp_cfg.compiler(builder.cc(self.target));
1328 let mut c_sources = vec![
1330 "UnwindLevel1-gcc-ext.c",
1332 "UnwindRegistersRestore.S",
1333 "UnwindRegistersSave.S",
1336 let cpp_sources = vec!["Unwind-EHABI.cpp", "Unwind-seh.cpp", "libunwind.cpp"];
1337 let cpp_len = cpp_sources.len();
1339 if self.target.contains("x86_64-fortanix-unknown-sgx") {
1340 c_sources.push("UnwindRustSgx.c");
1343 for src in c_sources {
1344 cc_cfg.file(root.join("src").join(src).canonicalize().unwrap());
1347 for src in &cpp_sources {
1348 cpp_cfg.file(root.join("src").join(src).canonicalize().unwrap());
1351 cpp_cfg.compile("unwind-cpp");
1353 // FIXME: https://github.com/alexcrichton/cc-rs/issues/545#issuecomment-679242845
1355 for entry in fs::read_dir(&out_dir).unwrap() {
1356 let file = entry.unwrap().path().canonicalize().unwrap();
1357 if file.is_file() && file.extension() == Some(OsStr::new("o")) {
1358 // file name starts with "Unwind-EHABI", "Unwind-seh" or "libunwind"
1359 let file_name = file.file_name().unwrap().to_str().expect("UTF-8 file name");
1360 if cpp_sources.iter().any(|f| file_name.starts_with(&f[..f.len() - 4])) {
1361 cc_cfg.object(&file);
1366 assert_eq!(cpp_len, count, "Can't get object files from {:?}", &out_dir);
1368 cc_cfg.compile("unwind");