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, compiler.stage, &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 objects.
130 // rustc historically provides a more self-contained installation for musl targets
131 // not requiring the presence of a native musl toolchain. For example, it can fall back
132 // to using gcc from a glibc-targeting toolchain for linking.
133 // To do that we have to distribute musl startup objects as a part of Rust toolchain
134 // and link with them manually in the self-contained mode.
135 if target.contains("musl") {
136 let srcdir = builder.musl_root(target).unwrap().join("lib");
137 for &obj in &["crt1.o", "Scrt1.o", "rcrt1.o", "crti.o", "crtn.o"] {
138 copy_and_stamp(&srcdir, obj);
140 } else if target.ends_with("-wasi") {
141 let srcdir = builder.wasi_root(target).unwrap().join("lib/wasm32-wasi");
142 copy_and_stamp(&srcdir, "crt1.o");
145 // Copies libunwind.a compiled to be linked with x86_64-fortanix-unknown-sgx.
147 // This target needs to be linked to Fortanix's port of llvm's libunwind.
148 // libunwind requires support for rwlock and printing to stderr,
149 // which is provided by std for this target.
150 if target == "x86_64-fortanix-unknown-sgx" {
151 let src_path_env = "X86_FORTANIX_SGX_LIBS";
153 env::var(src_path_env).unwrap_or_else(|_| panic!("{} not found in env", src_path_env));
154 copy_and_stamp(Path::new(&src), "libunwind.a");
157 if builder.config.sanitizers && compiler.stage != 0 {
158 // The sanitizers are only copied in stage1 or above,
159 // to avoid creating dependency on LLVM.
160 target_deps.extend(copy_sanitizers(builder, &compiler, target));
166 /// Configure cargo to compile the standard library, adding appropriate env vars
168 pub fn std_cargo(builder: &Builder<'_>, target: Interned<String>, stage: u32, cargo: &mut Cargo) {
169 if let Some(target) = env::var_os("MACOSX_STD_DEPLOYMENT_TARGET") {
170 cargo.env("MACOSX_DEPLOYMENT_TARGET", target);
173 // Determine if we're going to compile in optimized C intrinsics to
174 // the `compiler-builtins` crate. These intrinsics live in LLVM's
175 // `compiler-rt` repository, but our `src/llvm-project` submodule isn't
176 // always checked out, so we need to conditionally look for this. (e.g. if
177 // an external LLVM is used we skip the LLVM submodule checkout).
179 // Note that this shouldn't affect the correctness of `compiler-builtins`,
180 // but only its speed. Some intrinsics in C haven't been translated to Rust
181 // yet but that's pretty rare. Other intrinsics have optimized
182 // implementations in C which have only had slower versions ported to Rust,
183 // so we favor the C version where we can, but it's not critical.
185 // If `compiler-rt` is available ensure that the `c` feature of the
186 // `compiler-builtins` crate is enabled and it's configured to learn where
187 // `compiler-rt` is located.
188 let compiler_builtins_root = builder.src.join("src/llvm-project/compiler-rt");
189 let compiler_builtins_c_feature = if compiler_builtins_root.exists() {
190 // Note that `libprofiler_builtins/build.rs` also computes this so if
191 // you're changing something here please also change that.
192 cargo.env("RUST_COMPILER_RT_ROOT", &compiler_builtins_root);
193 " compiler-builtins-c".to_string()
198 if builder.no_std(target) == Some(true) {
199 let mut features = "compiler-builtins-mem".to_string();
200 features.push_str(&compiler_builtins_c_feature);
202 // for no-std targets we only compile a few no_std crates
204 .args(&["-p", "alloc"])
205 .arg("--manifest-path")
206 .arg(builder.src.join("src/liballoc/Cargo.toml"))
208 .arg("compiler-builtins-mem compiler-builtins-c");
210 let mut features = builder.std_features();
211 features.push_str(&compiler_builtins_c_feature);
216 .arg("--manifest-path")
217 .arg(builder.src.join("src/libtest/Cargo.toml"));
219 // Help the libc crate compile by assisting it in finding various
220 // sysroot native libraries.
221 if target.contains("musl") {
222 if let Some(p) = builder.musl_root(target) {
223 let root = format!("native={}/lib", p.to_str().unwrap());
224 cargo.rustflag("-L").rustflag(&root);
228 if target.ends_with("-wasi") {
229 if let Some(p) = builder.wasi_root(target) {
230 let root = format!("native={}/lib/wasm32-wasi", p.to_str().unwrap());
231 cargo.rustflag("-L").rustflag(&root);
236 // By default, rustc uses `-Cembed-bitcode=yes`, and Cargo overrides that
237 // with `-Cembed-bitcode=no` for non-LTO builds. However, libstd must be
238 // built with bitcode so that the produced rlibs can be used for both LTO
239 // builds (which use bitcode) and non-LTO builds (which use object code).
240 // So we override the override here!
242 // But we don't bother for the stage 0 compiler because it's never used
245 cargo.rustflag("-Cembed-bitcode=yes");
249 #[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
251 pub compiler: Compiler,
252 pub target_compiler: Compiler,
253 pub target: Interned<String>,
256 impl Step for StdLink {
259 fn should_run(run: ShouldRun<'_>) -> ShouldRun<'_> {
263 /// Link all libstd rlibs/dylibs into the sysroot location.
265 /// Links those artifacts generated by `compiler` to the `stage` compiler's
266 /// sysroot for the specified `host` and `target`.
268 /// Note that this assumes that `compiler` has already generated the libstd
269 /// libraries for `target`, and this method will find them in the relevant
270 /// output directory.
271 fn run(self, builder: &Builder<'_>) {
272 let compiler = self.compiler;
273 let target_compiler = self.target_compiler;
274 let target = self.target;
275 builder.info(&format!(
276 "Copying stage{} std from stage{} ({} -> {} / {})",
277 target_compiler.stage, compiler.stage, &compiler.host, target_compiler.host, target
279 let libdir = builder.sysroot_libdir(target_compiler, target);
280 let hostdir = builder.sysroot_libdir(target_compiler, compiler.host);
281 add_to_sysroot(builder, &libdir, &hostdir, &libstd_stamp(builder, compiler, target));
285 /// Copies sanitizer runtime libraries into target libdir.
287 builder: &Builder<'_>,
289 target: Interned<String>,
291 let runtimes: Vec<native::SanitizerRuntime> = builder.ensure(native::Sanitizers { target });
293 if builder.config.dry_run {
297 let mut target_deps = Vec::new();
298 let libdir = builder.sysroot_libdir(*compiler, target);
300 for runtime in &runtimes {
301 let dst = libdir.join(&runtime.name);
302 builder.copy(&runtime.path, &dst);
304 if target == "x86_64-apple-darwin" {
305 // Update the library install name reflect the fact it has been renamed.
306 let status = Command::new("install_name_tool")
308 .arg(format!("@rpath/{}", runtime.name))
311 .expect("failed to execute `install_name_tool`");
312 assert!(status.success());
315 target_deps.push(dst);
321 #[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
322 pub struct StartupObjects {
323 pub compiler: Compiler,
324 pub target: Interned<String>,
327 impl Step for StartupObjects {
328 type Output = Vec<PathBuf>;
330 fn should_run(run: ShouldRun<'_>) -> ShouldRun<'_> {
331 run.path("src/rtstartup")
334 fn make_run(run: RunConfig<'_>) {
335 run.builder.ensure(StartupObjects {
336 compiler: run.builder.compiler(run.builder.top_stage, run.host),
341 /// Builds and prepare startup objects like rsbegin.o and rsend.o
343 /// These are primarily used on Windows right now for linking executables/dlls.
344 /// They don't require any library support as they're just plain old object
345 /// files, so we just use the nightly snapshot compiler to always build them (as
346 /// no other compilers are guaranteed to be available).
347 fn run(self, builder: &Builder<'_>) -> Vec<PathBuf> {
348 let for_compiler = self.compiler;
349 let target = self.target;
350 if !target.contains("windows-gnu") {
354 let mut target_deps = vec![];
356 let src_dir = &builder.src.join("src/rtstartup");
357 let dst_dir = &builder.native_dir(target).join("rtstartup");
358 let sysroot_dir = &builder.sysroot_libdir(for_compiler, target);
359 t!(fs::create_dir_all(dst_dir));
361 for file in &["rsbegin", "rsend"] {
362 let src_file = &src_dir.join(file.to_string() + ".rs");
363 let dst_file = &dst_dir.join(file.to_string() + ".o");
364 if !up_to_date(src_file, dst_file) {
365 let mut cmd = Command::new(&builder.initial_rustc);
367 cmd.env("RUSTC_BOOTSTRAP", "1")
379 let target = sysroot_dir.join((*file).to_string() + ".o");
380 builder.copy(dst_file, &target);
381 target_deps.push(target);
384 for obj in ["crt2.o", "dllcrt2.o"].iter() {
385 let src = compiler_file(builder, builder.cc(target), target, obj);
386 let target = sysroot_dir.join(obj);
387 builder.copy(&src, &target);
388 target_deps.push(target);
395 #[derive(Debug, PartialOrd, Ord, Copy, Clone, PartialEq, Eq, Hash)]
397 pub target: Interned<String>,
398 pub compiler: Compiler,
401 impl Step for Rustc {
403 const ONLY_HOSTS: bool = true;
404 const DEFAULT: bool = true;
406 fn should_run(run: ShouldRun<'_>) -> ShouldRun<'_> {
407 run.all_krates("rustc-main")
410 fn make_run(run: RunConfig<'_>) {
411 run.builder.ensure(Rustc {
412 compiler: run.builder.compiler(run.builder.top_stage, run.host),
417 /// Builds the compiler.
419 /// This will build the compiler for a particular stage of the build using
420 /// the `compiler` targeting the `target` architecture. The artifacts
421 /// created will also be linked into the sysroot directory.
422 fn run(self, builder: &Builder<'_>) {
423 let compiler = self.compiler;
424 let target = self.target;
426 builder.ensure(Std { compiler, target });
428 if builder.config.keep_stage.contains(&compiler.stage) {
429 builder.info("Warning: Using a potentially old librustc. This may not behave well.");
430 builder.ensure(RustcLink { compiler, target_compiler: compiler, target });
434 let compiler_to_use = builder.compiler_for(compiler.stage, compiler.host, target);
435 if compiler_to_use != compiler {
436 builder.ensure(Rustc { compiler: compiler_to_use, target });
438 .info(&format!("Uplifting stage1 rustc ({} -> {})", builder.config.build, target));
439 builder.ensure(RustcLink {
440 compiler: compiler_to_use,
441 target_compiler: compiler,
447 // Ensure that build scripts and proc macros have a std / libproc_macro to link against.
449 compiler: builder.compiler(self.compiler.stage, builder.config.build),
450 target: builder.config.build,
453 let mut cargo = builder.cargo(compiler, Mode::Rustc, target, "build");
454 rustc_cargo(builder, &mut cargo, target);
456 builder.info(&format!(
457 "Building stage{} compiler artifacts ({} -> {})",
458 compiler.stage, &compiler.host, target
464 &librustc_stamp(builder, compiler, target),
469 builder.ensure(RustcLink {
470 compiler: builder.compiler(compiler.stage, builder.config.build),
471 target_compiler: compiler,
477 pub fn rustc_cargo(builder: &Builder<'_>, cargo: &mut Cargo, target: Interned<String>) {
480 .arg(builder.rustc_features())
481 .arg("--manifest-path")
482 .arg(builder.src.join("src/rustc/Cargo.toml"));
483 rustc_cargo_env(builder, cargo, target);
486 pub fn rustc_cargo_env(builder: &Builder<'_>, cargo: &mut Cargo, target: Interned<String>) {
487 // Set some configuration variables picked up by build scripts and
488 // the compiler alike
490 .env("CFG_RELEASE", builder.rust_release())
491 .env("CFG_RELEASE_CHANNEL", &builder.config.channel)
492 .env("CFG_VERSION", builder.rust_version())
493 .env("CFG_PREFIX", builder.config.prefix.clone().unwrap_or_default());
495 let libdir_relative = builder.config.libdir_relative().unwrap_or_else(|| Path::new("lib"));
496 cargo.env("CFG_LIBDIR_RELATIVE", libdir_relative);
498 if let Some(ref ver_date) = builder.rust_info.commit_date() {
499 cargo.env("CFG_VER_DATE", ver_date);
501 if let Some(ref ver_hash) = builder.rust_info.sha() {
502 cargo.env("CFG_VER_HASH", ver_hash);
504 if !builder.unstable_features() {
505 cargo.env("CFG_DISABLE_UNSTABLE_FEATURES", "1");
507 if let Some(ref s) = builder.config.rustc_default_linker {
508 cargo.env("CFG_DEFAULT_LINKER", s);
510 if builder.config.rustc_parallel {
511 cargo.rustflag("--cfg=parallel_compiler");
513 if builder.config.rust_verify_llvm_ir {
514 cargo.env("RUSTC_VERIFY_LLVM_IR", "1");
517 // Pass down configuration from the LLVM build into the build of
518 // librustc_llvm and librustc_codegen_llvm.
520 // Note that this is disabled if LLVM itself is disabled or we're in a check
521 // build. If we are in a check build we still go ahead here presuming we've
522 // detected that LLVM is alreay built and good to go which helps prevent
523 // busting caches (e.g. like #71152).
524 if builder.config.llvm_enabled()
525 && (builder.kind != Kind::Check
526 || crate::native::prebuilt_llvm_config(builder, target).is_ok())
528 if builder.is_rust_llvm(target) {
529 cargo.env("LLVM_RUSTLLVM", "1");
531 let llvm_config = builder.ensure(native::Llvm { target });
532 cargo.env("LLVM_CONFIG", &llvm_config);
533 let target_config = builder.config.target_config.get(&target);
534 if let Some(s) = target_config.and_then(|c| c.llvm_config.as_ref()) {
535 cargo.env("CFG_LLVM_ROOT", s);
537 // Some LLVM linker flags (-L and -l) may be needed to link librustc_llvm.
538 if let Some(ref s) = builder.config.llvm_ldflags {
539 cargo.env("LLVM_LINKER_FLAGS", s);
541 // Building with a static libstdc++ is only supported on linux right now,
542 // not for MSVC or macOS
543 if builder.config.llvm_static_stdcpp
544 && !target.contains("freebsd")
545 && !target.contains("msvc")
546 && !target.contains("apple")
548 let file = compiler_file(builder, builder.cxx(target).unwrap(), target, "libstdc++.a");
549 cargo.env("LLVM_STATIC_STDCPP", file);
551 if builder.config.llvm_link_shared || builder.config.llvm_thin_lto {
552 cargo.env("LLVM_LINK_SHARED", "1");
554 if builder.config.llvm_use_libcxx {
555 cargo.env("LLVM_USE_LIBCXX", "1");
557 if builder.config.llvm_optimize && !builder.config.llvm_release_debuginfo {
558 cargo.env("LLVM_NDEBUG", "1");
563 #[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
565 pub compiler: Compiler,
566 pub target_compiler: Compiler,
567 pub target: Interned<String>,
570 impl Step for RustcLink {
573 fn should_run(run: ShouldRun<'_>) -> ShouldRun<'_> {
577 /// Same as `std_link`, only for librustc
578 fn run(self, builder: &Builder<'_>) {
579 let compiler = self.compiler;
580 let target_compiler = self.target_compiler;
581 let target = self.target;
582 builder.info(&format!(
583 "Copying stage{} rustc from stage{} ({} -> {} / {})",
584 target_compiler.stage, compiler.stage, &compiler.host, target_compiler.host, target
588 &builder.sysroot_libdir(target_compiler, target),
589 &builder.sysroot_libdir(target_compiler, compiler.host),
590 &librustc_stamp(builder, compiler, target),
595 /// Cargo's output path for the standard library in a given stage, compiled
596 /// by a particular compiler for the specified target.
598 builder: &Builder<'_>,
600 target: Interned<String>,
602 builder.cargo_out(compiler, Mode::Std, target).join(".libstd.stamp")
605 /// Cargo's output path for librustc in a given stage, compiled by a particular
606 /// compiler for the specified target.
607 pub fn librustc_stamp(
608 builder: &Builder<'_>,
610 target: Interned<String>,
612 builder.cargo_out(compiler, Mode::Rustc, target).join(".librustc.stamp")
615 pub fn compiler_file(
616 builder: &Builder<'_>,
618 target: Interned<String>,
621 let mut cmd = Command::new(compiler);
622 cmd.args(builder.cflags(target, GitRepo::Rustc));
623 cmd.arg(format!("-print-file-name={}", file));
624 let out = output(&mut cmd);
625 PathBuf::from(out.trim())
628 #[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
630 pub compiler: Compiler,
633 impl Step for Sysroot {
634 type Output = Interned<PathBuf>;
636 fn should_run(run: ShouldRun<'_>) -> ShouldRun<'_> {
640 /// Returns the sysroot for the `compiler` specified that *this build system
643 /// That is, the sysroot for the stage0 compiler is not what the compiler
644 /// thinks it is by default, but it's the same as the default for stages
646 fn run(self, builder: &Builder<'_>) -> Interned<PathBuf> {
647 let compiler = self.compiler;
648 let sysroot = if compiler.stage == 0 {
649 builder.out.join(&compiler.host).join("stage0-sysroot")
651 builder.out.join(&compiler.host).join(format!("stage{}", compiler.stage))
653 let _ = fs::remove_dir_all(&sysroot);
654 t!(fs::create_dir_all(&sysroot));
656 // Symlink the source root into the same location inside the sysroot,
657 // where `rust-src` component would go (`$sysroot/lib/rustlib/src/rust`),
658 // so that any tools relying on `rust-src` also work for local builds,
659 // and also for translating the virtual `/rustc/$hash` back to the real
660 // directory (for running tests with `rust.remap-debuginfo = true`).
661 let sysroot_lib_rustlib_src = sysroot.join("lib/rustlib/src");
662 t!(fs::create_dir_all(&sysroot_lib_rustlib_src));
663 let sysroot_lib_rustlib_src_rust = sysroot_lib_rustlib_src.join("rust");
664 if let Err(e) = symlink_dir(&builder.config, &builder.src, &sysroot_lib_rustlib_src_rust) {
666 "warning: creating symbolic link `{}` to `{}` failed with {}",
667 sysroot_lib_rustlib_src_rust.display(),
668 builder.src.display(),
671 if builder.config.rust_remap_debuginfo {
673 "warning: some `src/test/ui` tests will fail when lacking `{}`",
674 sysroot_lib_rustlib_src_rust.display(),
679 INTERNER.intern_path(sysroot)
683 #[derive(Debug, Copy, PartialOrd, Ord, Clone, PartialEq, Eq, Hash)]
684 pub struct Assemble {
685 /// The compiler which we will produce in this step. Assemble itself will
686 /// take care of ensuring that the necessary prerequisites to do so exist,
687 /// that is, this target can be a stage2 compiler and Assemble will build
688 /// previous stages for you.
689 pub target_compiler: Compiler,
692 impl Step for Assemble {
693 type Output = Compiler;
695 fn should_run(run: ShouldRun<'_>) -> ShouldRun<'_> {
699 /// Prepare a new compiler from the artifacts in `stage`
701 /// This will assemble a compiler in `build/$host/stage$stage`. The compiler
702 /// must have been previously produced by the `stage - 1` builder.build
704 fn run(self, builder: &Builder<'_>) -> Compiler {
705 let target_compiler = self.target_compiler;
707 if target_compiler.stage == 0 {
709 builder.config.build, target_compiler.host,
710 "Cannot obtain compiler for non-native build triple at stage 0"
712 // The stage 0 compiler for the build triple is always pre-built.
713 return target_compiler;
716 // Get the compiler that we'll use to bootstrap ourselves.
718 // Note that this is where the recursive nature of the bootstrap
719 // happens, as this will request the previous stage's compiler on
720 // downwards to stage 0.
722 // Also note that we're building a compiler for the host platform. We
723 // only assume that we can run `build` artifacts, which means that to
724 // produce some other architecture compiler we need to start from
725 // `build` to get there.
727 // FIXME: Perhaps we should download those libraries?
728 // It would make builds faster...
730 // FIXME: It may be faster if we build just a stage 1 compiler and then
731 // use that to bootstrap this compiler forward.
732 let build_compiler = builder.compiler(target_compiler.stage - 1, builder.config.build);
734 // Build the libraries for this compiler to link to (i.e., the libraries
735 // it uses at runtime). NOTE: Crates the target compiler compiles don't
736 // link to these. (FIXME: Is that correct? It seems to be correct most
737 // of the time but I think we do link to these for stage2/bin compilers
738 // when not performing a full bootstrap).
739 builder.ensure(Rustc { compiler: build_compiler, target: target_compiler.host });
741 let lld_install = if builder.config.lld_enabled {
742 Some(builder.ensure(native::Lld { target: target_compiler.host }))
747 let stage = target_compiler.stage;
748 let host = target_compiler.host;
749 builder.info(&format!("Assembling stage{} compiler ({})", stage, host));
751 // Link in all dylibs to the libdir
752 let sysroot = builder.sysroot(target_compiler);
753 let rustc_libdir = builder.rustc_libdir(target_compiler);
754 t!(fs::create_dir_all(&rustc_libdir));
755 let src_libdir = builder.sysroot_libdir(build_compiler, host);
756 for f in builder.read_dir(&src_libdir) {
757 let filename = f.file_name().into_string().unwrap();
758 if is_dylib(&filename) {
759 builder.copy(&f.path(), &rustc_libdir.join(&filename));
763 let libdir = builder.sysroot_libdir(target_compiler, target_compiler.host);
764 if let Some(lld_install) = lld_install {
765 let src_exe = exe("lld", &target_compiler.host);
766 let dst_exe = exe("rust-lld", &target_compiler.host);
767 // we prepend this bin directory to the user PATH when linking Rust binaries. To
768 // avoid shadowing the system LLD we rename the LLD we provide to `rust-lld`.
769 let dst = libdir.parent().unwrap().join("bin");
770 t!(fs::create_dir_all(&dst));
771 builder.copy(&lld_install.join("bin").join(&src_exe), &dst.join(&dst_exe));
774 // Ensure that `libLLVM.so` ends up in the newly build compiler directory,
775 // so that it can be found when the newly built `rustc` is run.
776 dist::maybe_install_llvm_runtime(builder, target_compiler.host, &sysroot);
777 dist::maybe_install_llvm_target(builder, target_compiler.host, &sysroot);
779 // Link the compiler binary itself into place
780 let out_dir = builder.cargo_out(build_compiler, Mode::Rustc, host);
781 let rustc = out_dir.join(exe("rustc_binary", &*host));
782 let bindir = sysroot.join("bin");
783 t!(fs::create_dir_all(&bindir));
784 let compiler = builder.rustc(target_compiler);
785 builder.copy(&rustc, &compiler);
791 /// Link some files into a rustc sysroot.
793 /// For a particular stage this will link the file listed in `stamp` into the
794 /// `sysroot_dst` provided.
795 pub fn add_to_sysroot(
796 builder: &Builder<'_>,
798 sysroot_host_dst: &Path,
801 t!(fs::create_dir_all(&sysroot_dst));
802 t!(fs::create_dir_all(&sysroot_host_dst));
803 for (path, host) in builder.read_stamp_file(stamp) {
805 builder.copy(&path, &sysroot_host_dst.join(path.file_name().unwrap()));
807 builder.copy(&path, &sysroot_dst.join(path.file_name().unwrap()));
813 builder: &Builder<'_>,
815 tail_args: Vec<String>,
817 additional_target_deps: Vec<PathBuf>,
820 if builder.config.dry_run {
824 // `target_root_dir` looks like $dir/$target/release
825 let target_root_dir = stamp.parent().unwrap();
826 // `target_deps_dir` looks like $dir/$target/release/deps
827 let target_deps_dir = target_root_dir.join("deps");
828 // `host_root_dir` looks like $dir/release
829 let host_root_dir = target_root_dir
831 .unwrap() // chop off `release`
833 .unwrap() // chop off `$target`
834 .join(target_root_dir.file_name().unwrap());
836 // Spawn Cargo slurping up its JSON output. We'll start building up the
837 // `deps` array of all files it generated along with a `toplevel` array of
838 // files we need to probe for later.
839 let mut deps = Vec::new();
840 let mut toplevel = Vec::new();
841 let ok = stream_cargo(builder, cargo, tail_args, &mut |msg| {
842 let (filenames, crate_types) = match msg {
843 CargoMessage::CompilerArtifact {
845 target: CargoTarget { crate_types },
847 } => (filenames, crate_types),
850 for filename in filenames {
851 // Skip files like executables
852 if !(filename.ends_with(".rlib")
853 || filename.ends_with(".lib")
854 || filename.ends_with(".a")
855 || is_dylib(&filename)
856 || (is_check && filename.ends_with(".rmeta")))
861 let filename = Path::new(&*filename);
863 // If this was an output file in the "host dir" we don't actually
864 // worry about it, it's not relevant for us
865 if filename.starts_with(&host_root_dir) {
866 // Unless it's a proc macro used in the compiler
867 if crate_types.iter().any(|t| t == "proc-macro") {
868 deps.push((filename.to_path_buf(), true));
873 // If this was output in the `deps` dir then this is a precise file
874 // name (hash included) so we start tracking it.
875 if filename.starts_with(&target_deps_dir) {
876 deps.push((filename.to_path_buf(), false));
880 // Otherwise this was a "top level artifact" which right now doesn't
881 // have a hash in the name, but there's a version of this file in
882 // the `deps` folder which *does* have a hash in the name. That's
883 // the one we'll want to we'll probe for it later.
885 // We do not use `Path::file_stem` or `Path::extension` here,
886 // because some generated files may have multiple extensions e.g.
887 // `std-<hash>.dll.lib` on Windows. The aforementioned methods only
888 // split the file name by the last extension (`.lib`) while we need
889 // to split by all extensions (`.dll.lib`).
890 let expected_len = t!(filename.metadata()).len();
891 let filename = filename.file_name().unwrap().to_str().unwrap();
892 let mut parts = filename.splitn(2, '.');
893 let file_stem = parts.next().unwrap().to_owned();
894 let extension = parts.next().unwrap().to_owned();
896 toplevel.push((file_stem, extension, expected_len));
904 // Ok now we need to actually find all the files listed in `toplevel`. We've
905 // got a list of prefix/extensions and we basically just need to find the
906 // most recent file in the `deps` folder corresponding to each one.
907 let contents = t!(target_deps_dir.read_dir())
909 .map(|e| (e.path(), e.file_name().into_string().unwrap(), t!(e.metadata())))
910 .collect::<Vec<_>>();
911 for (prefix, extension, expected_len) in toplevel {
912 let candidates = contents.iter().filter(|&&(_, ref filename, ref meta)| {
913 filename.starts_with(&prefix[..])
914 && filename[prefix.len()..].starts_with('-')
915 && filename.ends_with(&extension[..])
916 && meta.len() == expected_len
919 .max_by_key(|&&(_, _, ref metadata)| FileTime::from_last_modification_time(metadata));
920 let path_to_add = match max {
921 Some(triple) => triple.0.to_str().unwrap(),
922 None => panic!("no output generated for {:?} {:?}", prefix, extension),
924 if is_dylib(path_to_add) {
925 let candidate = format!("{}.lib", path_to_add);
926 let candidate = PathBuf::from(candidate);
927 if candidate.exists() {
928 deps.push((candidate, false));
931 deps.push((path_to_add.into(), false));
934 deps.extend(additional_target_deps.into_iter().map(|d| (d, false)));
936 let mut new_contents = Vec::new();
937 for (dep, proc_macro) in deps.iter() {
938 new_contents.extend(if *proc_macro { b"h" } else { b"t" });
939 new_contents.extend(dep.to_str().unwrap().as_bytes());
940 new_contents.extend(b"\0");
942 t!(fs::write(&stamp, &new_contents));
943 deps.into_iter().map(|(d, _)| d).collect()
947 builder: &Builder<'_>,
949 tail_args: Vec<String>,
950 cb: &mut dyn FnMut(CargoMessage<'_>),
952 let mut cargo = Command::from(cargo);
953 if builder.config.dry_run {
956 // Instruct Cargo to give us json messages on stdout, critically leaving
957 // stderr as piped so we can get those pretty colors.
958 let mut message_format = if builder.config.json_output {
961 String::from("json-render-diagnostics")
963 if let Some(s) = &builder.config.rustc_error_format {
964 message_format.push_str(",json-diagnostic-");
965 message_format.push_str(s);
967 cargo.arg("--message-format").arg(message_format).stdout(Stdio::piped());
969 for arg in tail_args {
973 builder.verbose(&format!("running: {:?}", cargo));
974 let mut child = match cargo.spawn() {
976 Err(e) => panic!("failed to execute command: {:?}\nerror: {}", cargo, e),
979 // Spawn Cargo slurping up its JSON output. We'll start building up the
980 // `deps` array of all files it generated along with a `toplevel` array of
981 // files we need to probe for later.
982 let stdout = BufReader::new(child.stdout.take().unwrap());
983 for line in stdout.lines() {
985 match serde_json::from_str::<CargoMessage<'_>>(&line) {
987 if builder.config.json_output {
988 // Forward JSON to stdout.
989 println!("{}", line);
993 // If this was informational, just print it out and continue
994 Err(_) => println!("{}", line),
998 // Make sure Cargo actually succeeded after we read all of its stdout.
999 let status = t!(child.wait());
1000 if !status.success() {
1002 "command did not execute successfully: {:?}\n\
1003 expected success, got: {}",
1010 #[derive(Deserialize)]
1011 pub struct CargoTarget<'a> {
1012 crate_types: Vec<Cow<'a, str>>,
1015 #[derive(Deserialize)]
1016 #[serde(tag = "reason", rename_all = "kebab-case")]
1017 pub enum CargoMessage<'a> {
1019 package_id: Cow<'a, str>,
1020 features: Vec<Cow<'a, str>>,
1021 filenames: Vec<Cow<'a, str>>,
1022 target: CargoTarget<'a>,
1024 BuildScriptExecuted {
1025 package_id: Cow<'a, str>,