1 //! Implementation of compiling various phases of the compiler and standard
4 //! This module contains some of the real meat in the rustbuild build system
5 //! which is where Cargo is used to compiler the standard library, libtest, and
6 //! compiler. This module is also responsible for assembling the sysroot as it
7 //! goes along from the output of the previous stage.
12 use std::io::prelude::*;
13 use std::io::BufReader;
14 use std::path::{Path, PathBuf};
15 use std::process::{exit, Command, Stdio};
18 use build_helper::{output, t, up_to_date};
19 use filetime::FileTime;
20 use serde::Deserialize;
22 use crate::builder::Cargo;
25 use crate::util::{exe, is_dylib, symlink_dir};
26 use crate::{Compiler, GitRepo, Mode};
28 use crate::builder::{Builder, Kind, RunConfig, ShouldRun, Step};
29 use crate::cache::{Interned, INTERNER};
31 #[derive(Debug, PartialOrd, Ord, Copy, Clone, PartialEq, Eq, Hash)]
33 pub target: Interned<String>,
34 pub compiler: Compiler,
39 const DEFAULT: bool = true;
41 fn should_run(run: ShouldRun<'_>) -> ShouldRun<'_> {
42 run.all_krates("test")
45 fn make_run(run: RunConfig<'_>) {
46 run.builder.ensure(Std {
47 compiler: run.builder.compiler(run.builder.top_stage, run.host),
52 /// Builds the standard library.
54 /// This will build the standard library for a particular stage of the build
55 /// using the `compiler` targeting the `target` architecture. The artifacts
56 /// created will also be linked into the sysroot directory.
57 fn run(self, builder: &Builder<'_>) {
58 let target = self.target;
59 let compiler = self.compiler;
61 if builder.config.keep_stage.contains(&compiler.stage) {
62 builder.info("Warning: Using a potentially old libstd. This may not behave well.");
63 builder.ensure(StdLink { compiler, target_compiler: compiler, target });
67 let mut target_deps = builder.ensure(StartupObjects { compiler, target });
69 let compiler_to_use = builder.compiler_for(compiler.stage, compiler.host, target);
70 if compiler_to_use != compiler {
71 builder.ensure(Std { compiler: compiler_to_use, target });
72 builder.info(&format!("Uplifting stage1 std ({} -> {})", compiler_to_use.host, target));
74 // Even if we're not building std this stage, the new sysroot must
75 // still contain the third party objects needed by various targets.
76 copy_third_party_objects(builder, &compiler, target);
78 builder.ensure(StdLink {
79 compiler: compiler_to_use,
80 target_compiler: compiler,
86 target_deps.extend(copy_third_party_objects(builder, &compiler, target).into_iter());
88 let mut cargo = builder.cargo(compiler, Mode::Std, target, "build");
89 std_cargo(builder, target, &mut cargo);
91 builder.info(&format!(
92 "Building stage{} std artifacts ({} -> {})",
93 compiler.stage, &compiler.host, target
99 &libstd_stamp(builder, compiler, target),
104 builder.ensure(StdLink {
105 compiler: builder.compiler(compiler.stage, builder.config.build),
106 target_compiler: compiler,
112 /// Copies third party objects needed by various targets.
113 fn copy_third_party_objects(
114 builder: &Builder<'_>,
116 target: Interned<String>,
118 let libdir = builder.sysroot_libdir(*compiler, target);
120 let mut target_deps = vec![];
122 let mut copy_and_stamp = |sourcedir: &Path, name: &str| {
123 let target = libdir.join(name);
124 builder.copy(&sourcedir.join(name), &target);
125 target_deps.push(target);
128 // Copies the crt(1,i,n).o startup objects
130 // Since musl supports fully static linking, we can cross link for it even
131 // with a glibc-targeting toolchain, given we have the appropriate startup
132 // files. As those shipped with glibc won't work, copy the ones provided by
133 // musl so we have them on linux-gnu hosts.
134 if target.contains("musl") {
135 let srcdir = builder.musl_root(target).unwrap().join("lib");
136 for &obj in &["crt1.o", "crti.o", "crtn.o"] {
137 copy_and_stamp(&srcdir, obj);
139 } else if target.ends_with("-wasi") {
140 let srcdir = builder.wasi_root(target).unwrap().join("lib/wasm32-wasi");
141 copy_and_stamp(&srcdir, "crt1.o");
144 // Copies libunwind.a compiled to be linked with x86_64-fortanix-unknown-sgx.
146 // This target needs to be linked to Fortanix's port of llvm's libunwind.
147 // libunwind requires support for rwlock and printing to stderr,
148 // which is provided by std for this target.
149 if target == "x86_64-fortanix-unknown-sgx" {
150 let src_path_env = "X86_FORTANIX_SGX_LIBS";
152 env::var(src_path_env).unwrap_or_else(|_| panic!("{} not found in env", src_path_env));
153 copy_and_stamp(Path::new(&src), "libunwind.a");
156 if builder.config.sanitizers && compiler.stage != 0 {
157 // The sanitizers are only copied in stage1 or above,
158 // to avoid creating dependency on LLVM.
159 target_deps.extend(copy_sanitizers(builder, &compiler, target));
165 /// Configure cargo to compile the standard library, adding appropriate env vars
167 pub fn std_cargo(builder: &Builder<'_>, target: Interned<String>, cargo: &mut Cargo) {
168 if let Some(target) = env::var_os("MACOSX_STD_DEPLOYMENT_TARGET") {
169 cargo.env("MACOSX_DEPLOYMENT_TARGET", target);
172 // Determine if we're going to compile in optimized C intrinsics to
173 // the `compiler-builtins` crate. These intrinsics live in LLVM's
174 // `compiler-rt` repository, but our `src/llvm-project` submodule isn't
175 // always checked out, so we need to conditionally look for this. (e.g. if
176 // an external LLVM is used we skip the LLVM submodule checkout).
178 // Note that this shouldn't affect the correctness of `compiler-builtins`,
179 // but only its speed. Some intrinsics in C haven't been translated to Rust
180 // yet but that's pretty rare. Other intrinsics have optimized
181 // implementations in C which have only had slower versions ported to Rust,
182 // so we favor the C version where we can, but it's not critical.
184 // If `compiler-rt` is available ensure that the `c` feature of the
185 // `compiler-builtins` crate is enabled and it's configured to learn where
186 // `compiler-rt` is located.
187 let compiler_builtins_root = builder.src.join("src/llvm-project/compiler-rt");
188 let compiler_builtins_c_feature = if compiler_builtins_root.exists() {
189 // Note that `libprofiler_builtins/build.rs` also computes this so if
190 // you're changing something here please also change that.
191 cargo.env("RUST_COMPILER_RT_ROOT", &compiler_builtins_root);
192 " compiler-builtins-c".to_string()
197 if builder.no_std(target) == Some(true) {
198 let mut features = "compiler-builtins-mem".to_string();
199 features.push_str(&compiler_builtins_c_feature);
201 // for no-std targets we only compile a few no_std crates
203 .args(&["-p", "alloc"])
204 .arg("--manifest-path")
205 .arg(builder.src.join("src/liballoc/Cargo.toml"))
207 .arg("compiler-builtins-mem compiler-builtins-c");
209 let mut features = builder.std_features();
210 features.push_str(&compiler_builtins_c_feature);
215 .arg("--manifest-path")
216 .arg(builder.src.join("src/libtest/Cargo.toml"));
218 // Help the libc crate compile by assisting it in finding various
219 // sysroot native libraries.
220 if target.contains("musl") {
221 if let Some(p) = builder.musl_root(target) {
222 let root = format!("native={}/lib", p.to_str().unwrap());
223 cargo.rustflag("-L").rustflag(&root);
227 if target.ends_with("-wasi") {
228 if let Some(p) = builder.wasi_root(target) {
229 let root = format!("native={}/lib/wasm32-wasi", p.to_str().unwrap());
230 cargo.rustflag("-L").rustflag(&root);
236 #[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
238 pub compiler: Compiler,
239 pub target_compiler: Compiler,
240 pub target: Interned<String>,
243 impl Step for StdLink {
246 fn should_run(run: ShouldRun<'_>) -> ShouldRun<'_> {
250 /// Link all libstd rlibs/dylibs into the sysroot location.
252 /// Links those artifacts generated by `compiler` to the `stage` compiler's
253 /// sysroot for the specified `host` and `target`.
255 /// Note that this assumes that `compiler` has already generated the libstd
256 /// libraries for `target`, and this method will find them in the relevant
257 /// output directory.
258 fn run(self, builder: &Builder<'_>) {
259 let compiler = self.compiler;
260 let target_compiler = self.target_compiler;
261 let target = self.target;
262 builder.info(&format!(
263 "Copying stage{} std from stage{} ({} -> {} / {})",
264 target_compiler.stage, compiler.stage, &compiler.host, target_compiler.host, target
266 let libdir = builder.sysroot_libdir(target_compiler, target);
267 let hostdir = builder.sysroot_libdir(target_compiler, compiler.host);
268 add_to_sysroot(builder, &libdir, &hostdir, &libstd_stamp(builder, compiler, target));
272 /// Copies sanitizer runtime libraries into target libdir.
274 builder: &Builder<'_>,
276 target: Interned<String>,
278 let runtimes: Vec<native::SanitizerRuntime> = builder.ensure(native::Sanitizers { target });
280 if builder.config.dry_run {
284 let mut target_deps = Vec::new();
285 let libdir = builder.sysroot_libdir(*compiler, target);
287 for runtime in &runtimes {
288 let dst = libdir.join(&runtime.name);
289 builder.copy(&runtime.path, &dst);
291 if target == "x86_64-apple-darwin" {
292 // Update the library install name reflect the fact it has been renamed.
293 let status = Command::new("install_name_tool")
295 .arg(format!("@rpath/{}", runtime.name))
298 .expect("failed to execute `install_name_tool`");
299 assert!(status.success());
302 target_deps.push(dst);
308 #[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
309 pub struct StartupObjects {
310 pub compiler: Compiler,
311 pub target: Interned<String>,
314 impl Step for StartupObjects {
315 type Output = Vec<PathBuf>;
317 fn should_run(run: ShouldRun<'_>) -> ShouldRun<'_> {
318 run.path("src/rtstartup")
321 fn make_run(run: RunConfig<'_>) {
322 run.builder.ensure(StartupObjects {
323 compiler: run.builder.compiler(run.builder.top_stage, run.host),
328 /// Builds and prepare startup objects like rsbegin.o and rsend.o
330 /// These are primarily used on Windows right now for linking executables/dlls.
331 /// They don't require any library support as they're just plain old object
332 /// files, so we just use the nightly snapshot compiler to always build them (as
333 /// no other compilers are guaranteed to be available).
334 fn run(self, builder: &Builder<'_>) -> Vec<PathBuf> {
335 let for_compiler = self.compiler;
336 let target = self.target;
337 if !target.contains("windows-gnu") {
341 let mut target_deps = vec![];
343 let src_dir = &builder.src.join("src/rtstartup");
344 let dst_dir = &builder.native_dir(target).join("rtstartup");
345 let sysroot_dir = &builder.sysroot_libdir(for_compiler, target);
346 t!(fs::create_dir_all(dst_dir));
348 for file in &["rsbegin", "rsend"] {
349 let src_file = &src_dir.join(file.to_string() + ".rs");
350 let dst_file = &dst_dir.join(file.to_string() + ".o");
351 if !up_to_date(src_file, dst_file) {
352 let mut cmd = Command::new(&builder.initial_rustc);
354 cmd.env("RUSTC_BOOTSTRAP", "1")
366 let target = sysroot_dir.join((*file).to_string() + ".o");
367 builder.copy(dst_file, &target);
368 target_deps.push(target);
371 for obj in ["crt2.o", "dllcrt2.o"].iter() {
372 let src = compiler_file(builder, builder.cc(target), target, obj);
373 let target = sysroot_dir.join(obj);
374 builder.copy(&src, &target);
375 target_deps.push(target);
382 #[derive(Debug, PartialOrd, Ord, Copy, Clone, PartialEq, Eq, Hash)]
384 pub target: Interned<String>,
385 pub compiler: Compiler,
388 impl Step for Rustc {
390 const ONLY_HOSTS: bool = true;
391 const DEFAULT: bool = true;
393 fn should_run(run: ShouldRun<'_>) -> ShouldRun<'_> {
394 run.all_krates("rustc-main")
397 fn make_run(run: RunConfig<'_>) {
398 run.builder.ensure(Rustc {
399 compiler: run.builder.compiler(run.builder.top_stage, run.host),
404 /// Builds the compiler.
406 /// This will build the compiler for a particular stage of the build using
407 /// the `compiler` targeting the `target` architecture. The artifacts
408 /// created will also be linked into the sysroot directory.
409 fn run(self, builder: &Builder<'_>) {
410 let compiler = self.compiler;
411 let target = self.target;
413 builder.ensure(Std { compiler, target });
415 if builder.config.keep_stage.contains(&compiler.stage) {
416 builder.info("Warning: Using a potentially old librustc. This may not behave well.");
417 builder.ensure(RustcLink { compiler, target_compiler: compiler, target });
421 let compiler_to_use = builder.compiler_for(compiler.stage, compiler.host, target);
422 if compiler_to_use != compiler {
423 builder.ensure(Rustc { compiler: compiler_to_use, target });
425 .info(&format!("Uplifting stage1 rustc ({} -> {})", builder.config.build, target));
426 builder.ensure(RustcLink {
427 compiler: compiler_to_use,
428 target_compiler: compiler,
434 // Ensure that build scripts and proc macros have a std / libproc_macro to link against.
436 compiler: builder.compiler(self.compiler.stage, builder.config.build),
437 target: builder.config.build,
440 let mut cargo = builder.cargo(compiler, Mode::Rustc, target, "build");
441 rustc_cargo(builder, &mut cargo, target);
443 builder.info(&format!(
444 "Building stage{} compiler artifacts ({} -> {})",
445 compiler.stage, &compiler.host, target
451 &librustc_stamp(builder, compiler, target),
456 builder.ensure(RustcLink {
457 compiler: builder.compiler(compiler.stage, builder.config.build),
458 target_compiler: compiler,
464 pub fn rustc_cargo(builder: &Builder<'_>, cargo: &mut Cargo, target: Interned<String>) {
467 .arg(builder.rustc_features())
468 .arg("--manifest-path")
469 .arg(builder.src.join("src/rustc/Cargo.toml"));
470 rustc_cargo_env(builder, cargo, target);
473 pub fn rustc_cargo_env(builder: &Builder<'_>, cargo: &mut Cargo, target: Interned<String>) {
474 // Set some configuration variables picked up by build scripts and
475 // the compiler alike
477 .env("CFG_RELEASE", builder.rust_release())
478 .env("CFG_RELEASE_CHANNEL", &builder.config.channel)
479 .env("CFG_VERSION", builder.rust_version())
480 .env("CFG_PREFIX", builder.config.prefix.clone().unwrap_or_default());
482 let libdir_relative = builder.config.libdir_relative().unwrap_or_else(|| Path::new("lib"));
483 cargo.env("CFG_LIBDIR_RELATIVE", libdir_relative);
485 if let Some(ref ver_date) = builder.rust_info.commit_date() {
486 cargo.env("CFG_VER_DATE", ver_date);
488 if let Some(ref ver_hash) = builder.rust_info.sha() {
489 cargo.env("CFG_VER_HASH", ver_hash);
491 if !builder.unstable_features() {
492 cargo.env("CFG_DISABLE_UNSTABLE_FEATURES", "1");
494 if let Some(ref s) = builder.config.rustc_default_linker {
495 cargo.env("CFG_DEFAULT_LINKER", s);
497 if builder.config.rustc_parallel {
498 cargo.rustflag("--cfg=parallel_compiler");
500 if builder.config.rust_verify_llvm_ir {
501 cargo.env("RUSTC_VERIFY_LLVM_IR", "1");
504 // Pass down configuration from the LLVM build into the build of
505 // librustc_llvm and librustc_codegen_llvm.
507 // Note that this is disabled if LLVM itself is disabled or we're in a check
508 // build, where if we're in a check build there's no need to build all of
510 if builder.config.llvm_enabled() && builder.kind != Kind::Check {
511 if builder.is_rust_llvm(target) {
512 cargo.env("LLVM_RUSTLLVM", "1");
514 let llvm_config = builder.ensure(native::Llvm { target });
515 cargo.env("LLVM_CONFIG", &llvm_config);
516 let target_config = builder.config.target_config.get(&target);
517 if let Some(s) = target_config.and_then(|c| c.llvm_config.as_ref()) {
518 cargo.env("CFG_LLVM_ROOT", s);
520 // Some LLVM linker flags (-L and -l) may be needed to link librustc_llvm.
521 if let Some(ref s) = builder.config.llvm_ldflags {
522 cargo.env("LLVM_LINKER_FLAGS", s);
524 // Building with a static libstdc++ is only supported on linux right now,
525 // not for MSVC or macOS
526 if builder.config.llvm_static_stdcpp
527 && !target.contains("freebsd")
528 && !target.contains("msvc")
529 && !target.contains("apple")
531 let file = compiler_file(builder, builder.cxx(target).unwrap(), target, "libstdc++.a");
532 cargo.env("LLVM_STATIC_STDCPP", file);
534 if builder.config.llvm_link_shared || builder.config.llvm_thin_lto {
535 cargo.env("LLVM_LINK_SHARED", "1");
537 if builder.config.llvm_use_libcxx {
538 cargo.env("LLVM_USE_LIBCXX", "1");
540 if builder.config.llvm_optimize && !builder.config.llvm_release_debuginfo {
541 cargo.env("LLVM_NDEBUG", "1");
546 #[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
548 pub compiler: Compiler,
549 pub target_compiler: Compiler,
550 pub target: Interned<String>,
553 impl Step for RustcLink {
556 fn should_run(run: ShouldRun<'_>) -> ShouldRun<'_> {
560 /// Same as `std_link`, only for librustc
561 fn run(self, builder: &Builder<'_>) {
562 let compiler = self.compiler;
563 let target_compiler = self.target_compiler;
564 let target = self.target;
565 builder.info(&format!(
566 "Copying stage{} rustc from stage{} ({} -> {} / {})",
567 target_compiler.stage, compiler.stage, &compiler.host, target_compiler.host, target
571 &builder.sysroot_libdir(target_compiler, target),
572 &builder.sysroot_libdir(target_compiler, compiler.host),
573 &librustc_stamp(builder, compiler, target),
578 /// Cargo's output path for the standard library in a given stage, compiled
579 /// by a particular compiler for the specified target.
581 builder: &Builder<'_>,
583 target: Interned<String>,
585 builder.cargo_out(compiler, Mode::Std, target).join(".libstd.stamp")
588 /// Cargo's output path for librustc in a given stage, compiled by a particular
589 /// compiler for the specified target.
590 pub fn librustc_stamp(
591 builder: &Builder<'_>,
593 target: Interned<String>,
595 builder.cargo_out(compiler, Mode::Rustc, target).join(".librustc.stamp")
598 pub fn compiler_file(
599 builder: &Builder<'_>,
601 target: Interned<String>,
604 let mut cmd = Command::new(compiler);
605 cmd.args(builder.cflags(target, GitRepo::Rustc));
606 cmd.arg(format!("-print-file-name={}", file));
607 let out = output(&mut cmd);
608 PathBuf::from(out.trim())
611 #[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
613 pub compiler: Compiler,
616 impl Step for Sysroot {
617 type Output = Interned<PathBuf>;
619 fn should_run(run: ShouldRun<'_>) -> ShouldRun<'_> {
623 /// Returns the sysroot for the `compiler` specified that *this build system
626 /// That is, the sysroot for the stage0 compiler is not what the compiler
627 /// thinks it is by default, but it's the same as the default for stages
629 fn run(self, builder: &Builder<'_>) -> Interned<PathBuf> {
630 let compiler = self.compiler;
631 let sysroot = if compiler.stage == 0 {
632 builder.out.join(&compiler.host).join("stage0-sysroot")
634 builder.out.join(&compiler.host).join(format!("stage{}", compiler.stage))
636 let _ = fs::remove_dir_all(&sysroot);
637 t!(fs::create_dir_all(&sysroot));
639 // Symlink the source root into the same location inside the sysroot,
640 // where `rust-src` component would go (`$sysroot/lib/rustlib/src/rust`),
641 // so that any tools relying on `rust-src` also work for local builds,
642 // and also for translating the virtual `/rustc/$hash` back to the real
643 // directory (for running tests with `rust.remap-debuginfo = true`).
644 let sysroot_lib_rustlib_src = sysroot.join("lib/rustlib/src");
645 t!(fs::create_dir_all(&sysroot_lib_rustlib_src));
646 let sysroot_lib_rustlib_src_rust = sysroot_lib_rustlib_src.join("rust");
647 if let Err(e) = symlink_dir(&builder.config, &builder.src, &sysroot_lib_rustlib_src_rust) {
649 "warning: creating symbolic link `{}` to `{}` failed with {}",
650 sysroot_lib_rustlib_src_rust.display(),
651 builder.src.display(),
654 if builder.config.rust_remap_debuginfo {
656 "warning: some `src/test/ui` tests will fail when lacking `{}`",
657 sysroot_lib_rustlib_src_rust.display(),
662 INTERNER.intern_path(sysroot)
666 #[derive(Debug, Copy, PartialOrd, Ord, Clone, PartialEq, Eq, Hash)]
667 pub struct Assemble {
668 /// The compiler which we will produce in this step. Assemble itself will
669 /// take care of ensuring that the necessary prerequisites to do so exist,
670 /// that is, this target can be a stage2 compiler and Assemble will build
671 /// previous stages for you.
672 pub target_compiler: Compiler,
675 impl Step for Assemble {
676 type Output = Compiler;
678 fn should_run(run: ShouldRun<'_>) -> ShouldRun<'_> {
682 /// Prepare a new compiler from the artifacts in `stage`
684 /// This will assemble a compiler in `build/$host/stage$stage`. The compiler
685 /// must have been previously produced by the `stage - 1` builder.build
687 fn run(self, builder: &Builder<'_>) -> Compiler {
688 let target_compiler = self.target_compiler;
690 if target_compiler.stage == 0 {
692 builder.config.build, target_compiler.host,
693 "Cannot obtain compiler for non-native build triple at stage 0"
695 // The stage 0 compiler for the build triple is always pre-built.
696 return target_compiler;
699 // Get the compiler that we'll use to bootstrap ourselves.
701 // Note that this is where the recursive nature of the bootstrap
702 // happens, as this will request the previous stage's compiler on
703 // downwards to stage 0.
705 // Also note that we're building a compiler for the host platform. We
706 // only assume that we can run `build` artifacts, which means that to
707 // produce some other architecture compiler we need to start from
708 // `build` to get there.
710 // FIXME: Perhaps we should download those libraries?
711 // It would make builds faster...
713 // FIXME: It may be faster if we build just a stage 1 compiler and then
714 // use that to bootstrap this compiler forward.
715 let build_compiler = builder.compiler(target_compiler.stage - 1, builder.config.build);
717 // Build the libraries for this compiler to link to (i.e., the libraries
718 // it uses at runtime). NOTE: Crates the target compiler compiles don't
719 // link to these. (FIXME: Is that correct? It seems to be correct most
720 // of the time but I think we do link to these for stage2/bin compilers
721 // when not performing a full bootstrap).
722 builder.ensure(Rustc { compiler: build_compiler, target: target_compiler.host });
724 let lld_install = if builder.config.lld_enabled {
725 Some(builder.ensure(native::Lld { target: target_compiler.host }))
730 let stage = target_compiler.stage;
731 let host = target_compiler.host;
732 builder.info(&format!("Assembling stage{} compiler ({})", stage, host));
734 // Link in all dylibs to the libdir
735 let sysroot = builder.sysroot(target_compiler);
736 let rustc_libdir = builder.rustc_libdir(target_compiler);
737 t!(fs::create_dir_all(&rustc_libdir));
738 let src_libdir = builder.sysroot_libdir(build_compiler, host);
739 for f in builder.read_dir(&src_libdir) {
740 let filename = f.file_name().into_string().unwrap();
741 if is_dylib(&filename) {
742 builder.copy(&f.path(), &rustc_libdir.join(&filename));
746 let libdir = builder.sysroot_libdir(target_compiler, target_compiler.host);
747 if let Some(lld_install) = lld_install {
748 let src_exe = exe("lld", &target_compiler.host);
749 let dst_exe = exe("rust-lld", &target_compiler.host);
750 // we prepend this bin directory to the user PATH when linking Rust binaries. To
751 // avoid shadowing the system LLD we rename the LLD we provide to `rust-lld`.
752 let dst = libdir.parent().unwrap().join("bin");
753 t!(fs::create_dir_all(&dst));
754 builder.copy(&lld_install.join("bin").join(&src_exe), &dst.join(&dst_exe));
757 // Ensure that `libLLVM.so` ends up in the newly build compiler directory,
758 // so that it can be found when the newly built `rustc` is run.
759 dist::maybe_install_llvm_dylib(builder, target_compiler.host, &sysroot);
761 // Link the compiler binary itself into place
762 let out_dir = builder.cargo_out(build_compiler, Mode::Rustc, host);
763 let rustc = out_dir.join(exe("rustc_binary", &*host));
764 let bindir = sysroot.join("bin");
765 t!(fs::create_dir_all(&bindir));
766 let compiler = builder.rustc(target_compiler);
767 builder.copy(&rustc, &compiler);
773 /// Link some files into a rustc sysroot.
775 /// For a particular stage this will link the file listed in `stamp` into the
776 /// `sysroot_dst` provided.
777 pub fn add_to_sysroot(
778 builder: &Builder<'_>,
780 sysroot_host_dst: &Path,
783 t!(fs::create_dir_all(&sysroot_dst));
784 t!(fs::create_dir_all(&sysroot_host_dst));
785 for (path, host) in builder.read_stamp_file(stamp) {
787 builder.copy(&path, &sysroot_host_dst.join(path.file_name().unwrap()));
789 builder.copy(&path, &sysroot_dst.join(path.file_name().unwrap()));
795 builder: &Builder<'_>,
797 tail_args: Vec<String>,
799 additional_target_deps: Vec<PathBuf>,
802 if builder.config.dry_run {
806 // `target_root_dir` looks like $dir/$target/release
807 let target_root_dir = stamp.parent().unwrap();
808 // `target_deps_dir` looks like $dir/$target/release/deps
809 let target_deps_dir = target_root_dir.join("deps");
810 // `host_root_dir` looks like $dir/release
811 let host_root_dir = target_root_dir
813 .unwrap() // chop off `release`
815 .unwrap() // chop off `$target`
816 .join(target_root_dir.file_name().unwrap());
818 // Spawn Cargo slurping up its JSON output. We'll start building up the
819 // `deps` array of all files it generated along with a `toplevel` array of
820 // files we need to probe for later.
821 let mut deps = Vec::new();
822 let mut toplevel = Vec::new();
823 let ok = stream_cargo(builder, cargo, tail_args, &mut |msg| {
824 let (filenames, crate_types) = match msg {
825 CargoMessage::CompilerArtifact {
827 target: CargoTarget { crate_types },
829 } => (filenames, crate_types),
832 for filename in filenames {
833 // Skip files like executables
834 if !(filename.ends_with(".rlib")
835 || filename.ends_with(".lib")
836 || filename.ends_with(".a")
837 || is_dylib(&filename)
838 || (is_check && filename.ends_with(".rmeta")))
843 let filename = Path::new(&*filename);
845 // If this was an output file in the "host dir" we don't actually
846 // worry about it, it's not relevant for us
847 if filename.starts_with(&host_root_dir) {
848 // Unless it's a proc macro used in the compiler
849 if crate_types.iter().any(|t| t == "proc-macro") {
850 deps.push((filename.to_path_buf(), true));
855 // If this was output in the `deps` dir then this is a precise file
856 // name (hash included) so we start tracking it.
857 if filename.starts_with(&target_deps_dir) {
858 deps.push((filename.to_path_buf(), false));
862 // Otherwise this was a "top level artifact" which right now doesn't
863 // have a hash in the name, but there's a version of this file in
864 // the `deps` folder which *does* have a hash in the name. That's
865 // the one we'll want to we'll probe for it later.
867 // We do not use `Path::file_stem` or `Path::extension` here,
868 // because some generated files may have multiple extensions e.g.
869 // `std-<hash>.dll.lib` on Windows. The aforementioned methods only
870 // split the file name by the last extension (`.lib`) while we need
871 // to split by all extensions (`.dll.lib`).
872 let expected_len = t!(filename.metadata()).len();
873 let filename = filename.file_name().unwrap().to_str().unwrap();
874 let mut parts = filename.splitn(2, '.');
875 let file_stem = parts.next().unwrap().to_owned();
876 let extension = parts.next().unwrap().to_owned();
878 toplevel.push((file_stem, extension, expected_len));
886 // Ok now we need to actually find all the files listed in `toplevel`. We've
887 // got a list of prefix/extensions and we basically just need to find the
888 // most recent file in the `deps` folder corresponding to each one.
889 let contents = t!(target_deps_dir.read_dir())
891 .map(|e| (e.path(), e.file_name().into_string().unwrap(), t!(e.metadata())))
892 .collect::<Vec<_>>();
893 for (prefix, extension, expected_len) in toplevel {
894 let candidates = contents.iter().filter(|&&(_, ref filename, ref meta)| {
895 filename.starts_with(&prefix[..])
896 && filename[prefix.len()..].starts_with('-')
897 && filename.ends_with(&extension[..])
898 && meta.len() == expected_len
901 .max_by_key(|&&(_, _, ref metadata)| FileTime::from_last_modification_time(metadata));
902 let path_to_add = match max {
903 Some(triple) => triple.0.to_str().unwrap(),
904 None => panic!("no output generated for {:?} {:?}", prefix, extension),
906 if is_dylib(path_to_add) {
907 let candidate = format!("{}.lib", path_to_add);
908 let candidate = PathBuf::from(candidate);
909 if candidate.exists() {
910 deps.push((candidate, false));
913 deps.push((path_to_add.into(), false));
916 deps.extend(additional_target_deps.into_iter().map(|d| (d, false)));
918 let mut new_contents = Vec::new();
919 for (dep, proc_macro) in deps.iter() {
920 new_contents.extend(if *proc_macro { b"h" } else { b"t" });
921 new_contents.extend(dep.to_str().unwrap().as_bytes());
922 new_contents.extend(b"\0");
924 t!(fs::write(&stamp, &new_contents));
925 deps.into_iter().map(|(d, _)| d).collect()
929 builder: &Builder<'_>,
931 tail_args: Vec<String>,
932 cb: &mut dyn FnMut(CargoMessage<'_>),
934 let mut cargo = Command::from(cargo);
935 if builder.config.dry_run {
938 // Instruct Cargo to give us json messages on stdout, critically leaving
939 // stderr as piped so we can get those pretty colors.
940 let mut message_format = if builder.config.json_output {
943 String::from("json-render-diagnostics")
945 if let Some(s) = &builder.config.rustc_error_format {
946 message_format.push_str(",json-diagnostic-");
947 message_format.push_str(s);
949 cargo.arg("--message-format").arg(message_format).stdout(Stdio::piped());
951 for arg in tail_args {
955 builder.verbose(&format!("running: {:?}", cargo));
956 let mut child = match cargo.spawn() {
958 Err(e) => panic!("failed to execute command: {:?}\nerror: {}", cargo, e),
961 // Spawn Cargo slurping up its JSON output. We'll start building up the
962 // `deps` array of all files it generated along with a `toplevel` array of
963 // files we need to probe for later.
964 let stdout = BufReader::new(child.stdout.take().unwrap());
965 for line in stdout.lines() {
967 match serde_json::from_str::<CargoMessage<'_>>(&line) {
969 // If this was informational, just print it out and continue
970 Err(_) => println!("{}", line),
974 // Make sure Cargo actually succeeded after we read all of its stdout.
975 let status = t!(child.wait());
976 if !status.success() {
978 "command did not execute successfully: {:?}\n\
979 expected success, got: {}",
986 #[derive(Deserialize)]
987 pub struct CargoTarget<'a> {
988 crate_types: Vec<Cow<'a, str>>,
991 #[derive(Deserialize)]
992 #[serde(tag = "reason", rename_all = "kebab-case")]
993 pub enum CargoMessage<'a> {
995 package_id: Cow<'a, str>,
996 features: Vec<Cow<'a, str>>,
997 filenames: Vec<Cow<'a, str>>,
998 target: CargoTarget<'a>,
1000 BuildScriptExecuted {
1001 package_id: Cow<'a, str>,