1 // Copyright 2015 The Rust Project Developers. See the COPYRIGHT
2 // file at the top-level directory of this distribution and at
3 // http://rust-lang.org/COPYRIGHT.
5 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
6 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
7 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
8 // option. This file may not be copied, modified, or distributed
9 // except according to those terms.
11 //! Implementation of compiling various phases of the compiler and standard
14 //! This module contains some of the real meat in the rustbuild build system
15 //! which is where Cargo is used to compiler the standard library, libtest, and
16 //! compiler. This module is also responsible for assembling the sysroot as it
17 //! goes along from the output of the previous stage.
20 use std::fs::{self, File};
21 use std::io::BufReader;
22 use std::io::prelude::*;
23 use std::path::{Path, PathBuf};
24 use std::process::{Command, Stdio};
28 use build_helper::{output, mtime, up_to_date};
29 use filetime::FileTime;
32 use util::{exe, libdir, is_dylib, copy, read_stamp_file, CiEnv};
33 use {Build, Compiler, Mode};
37 use cache::{INTERNER, Interned};
38 use builder::{Step, RunConfig, ShouldRun, Builder};
40 #[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
42 pub target: Interned<String>,
43 pub compiler: Compiler,
48 const DEFAULT: bool = true;
50 fn should_run(run: ShouldRun) -> ShouldRun {
54 fn make_run(run: RunConfig) {
55 run.builder.ensure(Std {
56 compiler: run.builder.compiler(run.builder.top_stage, run.host),
61 /// Build the standard library.
63 /// This will build the standard library for a particular stage of the build
64 /// using the `compiler` targeting the `target` architecture. The artifacts
65 /// created will also be linked into the sysroot directory.
66 fn run(self, builder: &Builder) {
67 let build = builder.build;
68 let target = self.target;
69 let compiler = self.compiler;
71 builder.ensure(StartupObjects { compiler, target });
73 if build.force_use_stage1(compiler, target) {
74 let from = builder.compiler(1, build.build);
79 println!("Uplifting stage1 std ({} -> {})", from.host, target);
81 // Even if we're not building std this stage, the new sysroot must
82 // still contain the musl startup objects.
83 if target.contains("musl") {
84 let libdir = builder.sysroot_libdir(compiler, target);
85 copy_musl_third_party_objects(build, target, &libdir);
88 builder.ensure(StdLink {
90 target_compiler: compiler,
96 let _folder = build.fold_output(|| format!("stage{}-std", compiler.stage));
97 println!("Building stage{} std artifacts ({} -> {})", compiler.stage,
98 &compiler.host, target);
100 if target.contains("musl") {
101 let libdir = builder.sysroot_libdir(compiler, target);
102 copy_musl_third_party_objects(build, target, &libdir);
105 let out_dir = build.stage_out(compiler, Mode::Libstd);
106 build.clear_if_dirty(&out_dir, &builder.rustc(compiler));
107 let mut cargo = builder.cargo(compiler, Mode::Libstd, target, "build");
108 std_cargo(builder, &compiler, target, &mut cargo);
111 &libstd_stamp(build, compiler, target),
114 builder.ensure(StdLink {
115 compiler: builder.compiler(compiler.stage, build.build),
116 target_compiler: compiler,
122 /// Copies the crt(1,i,n).o startup objects
124 /// Since musl supports fully static linking, we can cross link for it even
125 /// with a glibc-targeting toolchain, given we have the appropriate startup
126 /// files. As those shipped with glibc won't work, copy the ones provided by
127 /// musl so we have them on linux-gnu hosts.
128 fn copy_musl_third_party_objects(build: &Build,
129 target: Interned<String>,
131 for &obj in &["crt1.o", "crti.o", "crtn.o"] {
132 copy(&build.musl_root(target).unwrap().join("lib").join(obj), &into.join(obj));
136 /// Configure cargo to compile the standard library, adding appropriate env vars
138 pub fn std_cargo(build: &Builder,
140 target: Interned<String>,
141 cargo: &mut Command) {
142 let mut features = build.std_features();
144 if let Some(target) = env::var_os("MACOSX_STD_DEPLOYMENT_TARGET") {
145 cargo.env("MACOSX_DEPLOYMENT_TARGET", target);
148 // When doing a local rebuild we tell cargo that we're stage1 rather than
149 // stage0. This works fine if the local rust and being-built rust have the
150 // same view of what the default allocator is, but fails otherwise. Since
151 // we don't have a way to express an allocator preference yet, work
152 // around the issue in the case of a local rebuild with jemalloc disabled.
153 if compiler.stage == 0 && build.local_rebuild && !build.config.use_jemalloc {
154 features.push_str(" force_alloc_system");
157 if compiler.stage != 0 && build.config.sanitizers {
158 // This variable is used by the sanitizer runtime crates, e.g.
159 // rustc_lsan, to build the sanitizer runtime from C code
160 // When this variable is missing, those crates won't compile the C code,
161 // so we don't set this variable during stage0 where llvm-config is
163 // We also only build the runtimes when --enable-sanitizers (or its
164 // config.toml equivalent) is used
165 let llvm_config = build.ensure(native::Llvm {
166 target: build.config.build,
169 cargo.env("LLVM_CONFIG", llvm_config);
172 cargo.arg("--features").arg(features)
173 .arg("--manifest-path")
174 .arg(build.src.join("src/libstd/Cargo.toml"));
176 if let Some(target) = build.config.target_config.get(&target) {
177 if let Some(ref jemalloc) = target.jemalloc {
178 cargo.env("JEMALLOC_OVERRIDE", jemalloc);
181 if target.contains("musl") {
182 if let Some(p) = build.musl_root(target) {
183 cargo.env("MUSL_ROOT", p);
188 #[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
190 pub compiler: Compiler,
191 pub target_compiler: Compiler,
192 pub target: Interned<String>,
195 impl Step for StdLink {
198 fn should_run(run: ShouldRun) -> ShouldRun {
202 /// Link all libstd rlibs/dylibs into the sysroot location.
204 /// Links those artifacts generated by `compiler` to a the `stage` compiler's
205 /// sysroot for the specified `host` and `target`.
207 /// Note that this assumes that `compiler` has already generated the libstd
208 /// libraries for `target`, and this method will find them in the relevant
209 /// output directory.
210 fn run(self, builder: &Builder) {
211 let build = builder.build;
212 let compiler = self.compiler;
213 let target_compiler = self.target_compiler;
214 let target = self.target;
215 println!("Copying stage{} std from stage{} ({} -> {} / {})",
216 target_compiler.stage,
219 target_compiler.host,
221 let libdir = builder.sysroot_libdir(target_compiler, target);
222 add_to_sysroot(&libdir, &libstd_stamp(build, compiler, target));
224 if build.config.sanitizers && compiler.stage != 0 && target == "x86_64-apple-darwin" {
225 // The sanitizers are only built in stage1 or above, so the dylibs will
226 // be missing in stage0 and causes panic. See the `std()` function above
227 // for reason why the sanitizers are not built in stage0.
228 copy_apple_sanitizer_dylibs(&build.native_dir(target), "osx", &libdir);
231 builder.ensure(tool::CleanTools {
232 compiler: target_compiler,
239 fn copy_apple_sanitizer_dylibs(native_dir: &Path, platform: &str, into: &Path) {
240 for &sanitizer in &["asan", "tsan"] {
241 let filename = format!("libclang_rt.{}_{}_dynamic.dylib", sanitizer, platform);
242 let mut src_path = native_dir.join(sanitizer);
243 src_path.push("build");
244 src_path.push("lib");
245 src_path.push("darwin");
246 src_path.push(&filename);
247 copy(&src_path, &into.join(filename));
251 #[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
252 pub struct StartupObjects {
253 pub compiler: Compiler,
254 pub target: Interned<String>,
257 impl Step for StartupObjects {
260 fn should_run(run: ShouldRun) -> ShouldRun {
261 run.path("src/rtstartup")
264 fn make_run(run: RunConfig) {
265 run.builder.ensure(StartupObjects {
266 compiler: run.builder.compiler(run.builder.top_stage, run.host),
271 /// Build and prepare startup objects like rsbegin.o and rsend.o
273 /// These are primarily used on Windows right now for linking executables/dlls.
274 /// They don't require any library support as they're just plain old object
275 /// files, so we just use the nightly snapshot compiler to always build them (as
276 /// no other compilers are guaranteed to be available).
277 fn run(self, builder: &Builder) {
278 let build = builder.build;
279 let for_compiler = self.compiler;
280 let target = self.target;
281 if !target.contains("pc-windows-gnu") {
285 let src_dir = &build.src.join("src/rtstartup");
286 let dst_dir = &build.native_dir(target).join("rtstartup");
287 let sysroot_dir = &builder.sysroot_libdir(for_compiler, target);
288 t!(fs::create_dir_all(dst_dir));
290 for file in &["rsbegin", "rsend"] {
291 let src_file = &src_dir.join(file.to_string() + ".rs");
292 let dst_file = &dst_dir.join(file.to_string() + ".o");
293 if !up_to_date(src_file, dst_file) {
294 let mut cmd = Command::new(&build.initial_rustc);
295 build.run(cmd.env("RUSTC_BOOTSTRAP", "1")
296 .arg("--cfg").arg("stage0")
297 .arg("--target").arg(target)
299 .arg("-o").arg(dst_file)
303 copy(dst_file, &sysroot_dir.join(file.to_string() + ".o"));
306 for obj in ["crt2.o", "dllcrt2.o"].iter() {
307 let src = compiler_file(build,
311 copy(&src, &sysroot_dir.join(obj));
316 #[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
318 pub compiler: Compiler,
319 pub target: Interned<String>,
324 const DEFAULT: bool = true;
326 fn should_run(run: ShouldRun) -> ShouldRun {
327 run.all_krates("test")
330 fn make_run(run: RunConfig) {
331 run.builder.ensure(Test {
332 compiler: run.builder.compiler(run.builder.top_stage, run.host),
339 /// This will build libtest and supporting libraries for a particular stage of
340 /// the build using the `compiler` targeting the `target` architecture. The
341 /// artifacts created will also be linked into the sysroot directory.
342 fn run(self, builder: &Builder) {
343 let build = builder.build;
344 let target = self.target;
345 let compiler = self.compiler;
347 builder.ensure(Std { compiler, target });
349 if build.force_use_stage1(compiler, target) {
350 builder.ensure(Test {
351 compiler: builder.compiler(1, build.build),
354 println!("Uplifting stage1 test ({} -> {})", &build.build, target);
355 builder.ensure(TestLink {
356 compiler: builder.compiler(1, build.build),
357 target_compiler: compiler,
363 let _folder = build.fold_output(|| format!("stage{}-test", compiler.stage));
364 println!("Building stage{} test artifacts ({} -> {})", compiler.stage,
365 &compiler.host, target);
366 let out_dir = build.stage_out(compiler, Mode::Libtest);
367 build.clear_if_dirty(&out_dir, &libstd_stamp(build, compiler, target));
368 let mut cargo = builder.cargo(compiler, Mode::Libtest, target, "build");
369 test_cargo(build, &compiler, target, &mut cargo);
372 &libtest_stamp(build, compiler, target),
375 builder.ensure(TestLink {
376 compiler: builder.compiler(compiler.stage, build.build),
377 target_compiler: compiler,
383 /// Same as `std_cargo`, but for libtest
384 pub fn test_cargo(build: &Build,
385 _compiler: &Compiler,
386 _target: Interned<String>,
387 cargo: &mut Command) {
388 if let Some(target) = env::var_os("MACOSX_STD_DEPLOYMENT_TARGET") {
389 cargo.env("MACOSX_DEPLOYMENT_TARGET", target);
391 cargo.arg("--manifest-path")
392 .arg(build.src.join("src/libtest/Cargo.toml"));
395 #[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
396 pub struct TestLink {
397 pub compiler: Compiler,
398 pub target_compiler: Compiler,
399 pub target: Interned<String>,
402 impl Step for TestLink {
405 fn should_run(run: ShouldRun) -> ShouldRun {
409 /// Same as `std_link`, only for libtest
410 fn run(self, builder: &Builder) {
411 let build = builder.build;
412 let compiler = self.compiler;
413 let target_compiler = self.target_compiler;
414 let target = self.target;
415 println!("Copying stage{} test from stage{} ({} -> {} / {})",
416 target_compiler.stage,
419 target_compiler.host,
421 add_to_sysroot(&builder.sysroot_libdir(target_compiler, target),
422 &libtest_stamp(build, compiler, target));
423 builder.ensure(tool::CleanTools {
424 compiler: target_compiler,
431 #[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
433 pub compiler: Compiler,
434 pub target: Interned<String>,
437 impl Step for Rustc {
439 const ONLY_HOSTS: bool = true;
440 const DEFAULT: bool = true;
442 fn should_run(run: ShouldRun) -> ShouldRun {
443 run.all_krates("rustc-main")
446 fn make_run(run: RunConfig) {
447 run.builder.ensure(Rustc {
448 compiler: run.builder.compiler(run.builder.top_stage, run.host),
453 /// Build the compiler.
455 /// This will build the compiler for a particular stage of the build using
456 /// the `compiler` targeting the `target` architecture. The artifacts
457 /// created will also be linked into the sysroot directory.
458 fn run(self, builder: &Builder) {
459 let build = builder.build;
460 let compiler = self.compiler;
461 let target = self.target;
463 builder.ensure(Test { compiler, target });
465 if build.force_use_stage1(compiler, target) {
466 builder.ensure(Rustc {
467 compiler: builder.compiler(1, build.build),
470 println!("Uplifting stage1 rustc ({} -> {})", &build.build, target);
471 builder.ensure(RustcLink {
472 compiler: builder.compiler(1, build.build),
473 target_compiler: compiler,
479 // Ensure that build scripts have a std to link against.
481 compiler: builder.compiler(self.compiler.stage, build.build),
485 let _folder = build.fold_output(|| format!("stage{}-rustc", compiler.stage));
486 println!("Building stage{} compiler artifacts ({} -> {})",
487 compiler.stage, &compiler.host, target);
489 let stage_out = builder.stage_out(compiler, Mode::Librustc);
490 build.clear_if_dirty(&stage_out, &libstd_stamp(build, compiler, target));
491 build.clear_if_dirty(&stage_out, &libtest_stamp(build, compiler, target));
493 let mut cargo = builder.cargo(compiler, Mode::Librustc, target, "build");
494 rustc_cargo(build, &mut cargo);
497 &librustc_stamp(build, compiler, target),
500 builder.ensure(RustcLink {
501 compiler: builder.compiler(compiler.stage, build.build),
502 target_compiler: compiler,
508 pub fn rustc_cargo(build: &Build, cargo: &mut Command) {
509 cargo.arg("--features").arg(build.rustc_features())
510 .arg("--manifest-path")
511 .arg(build.src.join("src/rustc/Cargo.toml"));
512 rustc_cargo_env(build, cargo);
515 fn rustc_cargo_env(build: &Build, cargo: &mut Command) {
516 // Set some configuration variables picked up by build scripts and
517 // the compiler alike
518 cargo.env("CFG_RELEASE", build.rust_release())
519 .env("CFG_RELEASE_CHANNEL", &build.config.channel)
520 .env("CFG_VERSION", build.rust_version())
521 .env("CFG_PREFIX", build.config.prefix.clone().unwrap_or_default())
522 .env("CFG_CODEGEN_BACKENDS_DIR", &build.config.rust_codegen_backends_dir);
524 let libdir_relative = build.config.libdir_relative().unwrap_or(Path::new("lib"));
525 cargo.env("CFG_LIBDIR_RELATIVE", libdir_relative);
527 // If we're not building a compiler with debugging information then remove
528 // these two env vars which would be set otherwise.
529 if build.config.rust_debuginfo_only_std {
530 cargo.env_remove("RUSTC_DEBUGINFO");
531 cargo.env_remove("RUSTC_DEBUGINFO_LINES");
534 if let Some(ref ver_date) = build.rust_info.commit_date() {
535 cargo.env("CFG_VER_DATE", ver_date);
537 if let Some(ref ver_hash) = build.rust_info.sha() {
538 cargo.env("CFG_VER_HASH", ver_hash);
540 if !build.unstable_features() {
541 cargo.env("CFG_DISABLE_UNSTABLE_FEATURES", "1");
543 if let Some(ref s) = build.config.rustc_default_linker {
544 cargo.env("CFG_DEFAULT_LINKER", s);
546 if build.config.rustc_parallel_queries {
547 cargo.env("RUSTC_PARALLEL_QUERIES", "1");
551 #[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
553 pub compiler: Compiler,
554 pub target_compiler: Compiler,
555 pub target: Interned<String>,
558 impl Step for RustcLink {
561 fn should_run(run: ShouldRun) -> ShouldRun {
565 /// Same as `std_link`, only for librustc
566 fn run(self, builder: &Builder) {
567 let build = builder.build;
568 let compiler = self.compiler;
569 let target_compiler = self.target_compiler;
570 let target = self.target;
571 println!("Copying stage{} rustc from stage{} ({} -> {} / {})",
572 target_compiler.stage,
575 target_compiler.host,
577 add_to_sysroot(&builder.sysroot_libdir(target_compiler, target),
578 &librustc_stamp(build, compiler, target));
579 builder.ensure(tool::CleanTools {
580 compiler: target_compiler,
582 mode: Mode::Librustc,
587 #[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
588 pub struct CodegenBackend {
589 pub compiler: Compiler,
590 pub target: Interned<String>,
591 pub backend: Interned<String>,
594 impl Step for CodegenBackend {
596 const ONLY_HOSTS: bool = true;
597 const DEFAULT: bool = true;
599 fn should_run(run: ShouldRun) -> ShouldRun {
600 run.all_krates("rustc_trans")
603 fn make_run(run: RunConfig) {
604 let backend = run.builder.config.rust_codegen_backends.get(0);
605 let backend = backend.cloned().unwrap_or_else(|| {
606 INTERNER.intern_str("llvm")
608 run.builder.ensure(CodegenBackend {
609 compiler: run.builder.compiler(run.builder.top_stage, run.host),
615 fn run(self, builder: &Builder) {
616 let build = builder.build;
617 let compiler = self.compiler;
618 let target = self.target;
620 builder.ensure(Rustc { compiler, target });
622 if build.force_use_stage1(compiler, target) {
623 builder.ensure(CodegenBackend {
624 compiler: builder.compiler(1, build.build),
626 backend: self.backend,
631 let mut cargo = builder.cargo(compiler, Mode::Librustc, target, "build");
632 let mut features = build.rustc_features().to_string();
633 cargo.arg("--manifest-path")
634 .arg(build.src.join("src/librustc_trans/Cargo.toml"));
635 rustc_cargo_env(build, &mut cargo);
637 let _folder = build.fold_output(|| format!("stage{}-rustc_trans", compiler.stage));
639 match &*self.backend {
640 "llvm" | "emscripten" => {
641 // Build LLVM for our target. This will implicitly build the
642 // host LLVM if necessary.
643 let llvm_config = builder.ensure(native::Llvm {
645 emscripten: self.backend == "emscripten",
648 if self.backend == "emscripten" {
649 features.push_str(" emscripten");
652 println!("Building stage{} codegen artifacts ({} -> {}, {})",
653 compiler.stage, &compiler.host, target, self.backend);
655 // Pass down configuration from the LLVM build into the build of
656 // librustc_llvm and librustc_trans.
657 if build.is_rust_llvm(target) {
658 cargo.env("LLVM_RUSTLLVM", "1");
660 cargo.env("LLVM_CONFIG", &llvm_config);
661 if self.backend != "emscripten" {
662 let target_config = build.config.target_config.get(&target);
663 if let Some(s) = target_config.and_then(|c| c.llvm_config.as_ref()) {
664 cargo.env("CFG_LLVM_ROOT", s);
667 // Building with a static libstdc++ is only supported on linux right now,
668 // not for MSVC or macOS
669 if build.config.llvm_static_stdcpp &&
670 !target.contains("freebsd") &&
671 !target.contains("windows") &&
672 !target.contains("apple") {
673 let file = compiler_file(build,
674 build.cxx(target).unwrap(),
677 cargo.env("LLVM_STATIC_STDCPP", file);
679 if build.config.llvm_link_shared {
680 cargo.env("LLVM_LINK_SHARED", "1");
683 _ => panic!("unknown backend: {}", self.backend),
686 let tmp_stamp = build.cargo_out(compiler, Mode::Librustc, target)
688 let files = run_cargo(build,
689 cargo.arg("--features").arg(features),
692 let mut files = files.into_iter()
694 let filename = f.file_name().unwrap().to_str().unwrap();
695 is_dylib(filename) && filename.contains("rustc_trans-")
697 let codegen_backend = match files.next() {
699 None => panic!("no dylibs built for codegen backend?"),
701 if let Some(f) = files.next() {
702 panic!("codegen backend built two dylibs:\n{}\n{}",
703 codegen_backend.display(),
706 let stamp = codegen_backend_stamp(build, compiler, target, self.backend);
707 let codegen_backend = codegen_backend.to_str().unwrap();
708 t!(t!(File::create(&stamp)).write_all(codegen_backend.as_bytes()));
712 /// Creates the `codegen-backends` folder for a compiler that's about to be
713 /// assembled as a complete compiler.
715 /// This will take the codegen artifacts produced by `compiler` and link them
716 /// into an appropriate location for `target_compiler` to be a functional
718 fn copy_codegen_backends_to_sysroot(builder: &Builder,
720 target_compiler: Compiler) {
721 let build = builder.build;
722 let target = target_compiler.host;
724 // Note that this step is different than all the other `*Link` steps in
725 // that it's not assembling a bunch of libraries but rather is primarily
726 // moving the codegen backend into place. The codegen backend of rustc is
727 // not linked into the main compiler by default but is rather dynamically
728 // selected at runtime for inclusion.
730 // Here we're looking for the output dylib of the `CodegenBackend` step and
731 // we're copying that into the `codegen-backends` folder.
732 let dst = builder.sysroot_codegen_backends(target_compiler);
733 t!(fs::create_dir_all(&dst));
735 for backend in builder.config.rust_codegen_backends.iter() {
736 let stamp = codegen_backend_stamp(build, compiler, target, *backend);
737 let mut dylib = String::new();
738 t!(t!(File::open(&stamp)).read_to_string(&mut dylib));
739 let file = Path::new(&dylib);
740 let filename = file.file_name().unwrap().to_str().unwrap();
741 // change `librustc_trans-xxxxxx.so` to `librustc_trans-llvm.so`
742 let target_filename = {
743 let dash = filename.find("-").unwrap();
744 let dot = filename.find(".").unwrap();
750 copy(&file, &dst.join(target_filename));
754 fn copy_lld_to_sysroot(builder: &Builder,
755 target_compiler: Compiler,
756 lld_install_root: &Path) {
757 let target = target_compiler.host;
759 let dst = builder.sysroot_libdir(target_compiler, target)
763 t!(fs::create_dir_all(&dst));
765 let exe = exe("lld", &target);
766 copy(&lld_install_root.join("bin").join(&exe), &dst.join(&exe));
769 /// Cargo's output path for the standard library in a given stage, compiled
770 /// by a particular compiler for the specified target.
771 pub fn libstd_stamp(build: &Build, compiler: Compiler, target: Interned<String>) -> PathBuf {
772 build.cargo_out(compiler, Mode::Libstd, target).join(".libstd.stamp")
775 /// Cargo's output path for libtest in a given stage, compiled by a particular
776 /// compiler for the specified target.
777 pub fn libtest_stamp(build: &Build, compiler: Compiler, target: Interned<String>) -> PathBuf {
778 build.cargo_out(compiler, Mode::Libtest, target).join(".libtest.stamp")
781 /// Cargo's output path for librustc in a given stage, compiled by a particular
782 /// compiler for the specified target.
783 pub fn librustc_stamp(build: &Build, compiler: Compiler, target: Interned<String>) -> PathBuf {
784 build.cargo_out(compiler, Mode::Librustc, target).join(".librustc.stamp")
787 fn codegen_backend_stamp(build: &Build,
789 target: Interned<String>,
790 backend: Interned<String>) -> PathBuf {
791 build.cargo_out(compiler, Mode::Librustc, target)
792 .join(format!(".librustc_trans-{}.stamp", backend))
795 fn compiler_file(build: &Build,
797 target: Interned<String>,
798 file: &str) -> PathBuf {
799 let mut cmd = Command::new(compiler);
800 cmd.args(build.cflags(target));
801 cmd.arg(format!("-print-file-name={}", file));
802 let out = output(&mut cmd);
803 PathBuf::from(out.trim())
806 #[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
808 pub compiler: Compiler,
811 impl Step for Sysroot {
812 type Output = Interned<PathBuf>;
814 fn should_run(run: ShouldRun) -> ShouldRun {
818 /// Returns the sysroot for the `compiler` specified that *this build system
821 /// That is, the sysroot for the stage0 compiler is not what the compiler
822 /// thinks it is by default, but it's the same as the default for stages
824 fn run(self, builder: &Builder) -> Interned<PathBuf> {
825 let build = builder.build;
826 let compiler = self.compiler;
827 let sysroot = if compiler.stage == 0 {
828 build.out.join(&compiler.host).join("stage0-sysroot")
830 build.out.join(&compiler.host).join(format!("stage{}", compiler.stage))
832 let _ = fs::remove_dir_all(&sysroot);
833 t!(fs::create_dir_all(&sysroot));
834 INTERNER.intern_path(sysroot)
838 #[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
839 pub struct Assemble {
840 /// The compiler which we will produce in this step. Assemble itself will
841 /// take care of ensuring that the necessary prerequisites to do so exist,
842 /// that is, this target can be a stage2 compiler and Assemble will build
843 /// previous stages for you.
844 pub target_compiler: Compiler,
847 impl Step for Assemble {
848 type Output = Compiler;
850 fn should_run(run: ShouldRun) -> ShouldRun {
851 run.all_krates("rustc-main")
854 /// Prepare a new compiler from the artifacts in `stage`
856 /// This will assemble a compiler in `build/$host/stage$stage`. The compiler
857 /// must have been previously produced by the `stage - 1` build.build
859 fn run(self, builder: &Builder) -> Compiler {
860 let build = builder.build;
861 let target_compiler = self.target_compiler;
863 if target_compiler.stage == 0 {
864 assert_eq!(build.build, target_compiler.host,
865 "Cannot obtain compiler for non-native build triple at stage 0");
866 // The stage 0 compiler for the build triple is always pre-built.
867 return target_compiler;
870 // Get the compiler that we'll use to bootstrap ourselves.
872 // Note that this is where the recursive nature of the bootstrap
873 // happens, as this will request the previous stage's compiler on
874 // downwards to stage 0.
876 // Also note that we're building a compiler for the host platform. We
877 // only assume that we can run `build` artifacts, which means that to
878 // produce some other architecture compiler we need to start from
879 // `build` to get there.
881 // FIXME: Perhaps we should download those libraries?
882 // It would make builds faster...
884 // FIXME: It may be faster if we build just a stage 1 compiler and then
885 // use that to bootstrap this compiler forward.
887 builder.compiler(target_compiler.stage - 1, build.build);
889 // Build the libraries for this compiler to link to (i.e., the libraries
890 // it uses at runtime). NOTE: Crates the target compiler compiles don't
891 // link to these. (FIXME: Is that correct? It seems to be correct most
892 // of the time but I think we do link to these for stage2/bin compilers
893 // when not performing a full bootstrap).
894 if builder.build.config.keep_stage.map_or(false, |s| target_compiler.stage <= s) {
895 builder.verbose("skipping compilation of compiler due to --keep-stage");
896 let compiler = build_compiler;
897 for stage in 0..min(target_compiler.stage, builder.config.keep_stage.unwrap()) {
898 let target_compiler = builder.compiler(stage, target_compiler.host);
899 let target = target_compiler.host;
900 builder.ensure(StdLink { compiler, target_compiler, target });
901 builder.ensure(TestLink { compiler, target_compiler, target });
902 builder.ensure(RustcLink { compiler, target_compiler, target });
905 builder.ensure(Rustc {
906 compiler: build_compiler,
907 target: target_compiler.host,
909 for &backend in build.config.rust_codegen_backends.iter() {
910 builder.ensure(CodegenBackend {
911 compiler: build_compiler,
912 target: target_compiler.host,
918 let lld_install = if build.config.lld_enabled {
919 Some(builder.ensure(native::Lld {
920 target: target_compiler.host,
926 let stage = target_compiler.stage;
927 let host = target_compiler.host;
928 println!("Assembling stage{} compiler ({})", stage, host);
930 // Link in all dylibs to the libdir
931 let sysroot = builder.sysroot(target_compiler);
932 let sysroot_libdir = sysroot.join(libdir(&*host));
933 t!(fs::create_dir_all(&sysroot_libdir));
934 let src_libdir = builder.sysroot_libdir(build_compiler, host);
935 for f in t!(fs::read_dir(&src_libdir)).map(|f| t!(f)) {
936 let filename = f.file_name().into_string().unwrap();
937 if is_dylib(&filename) {
938 copy(&f.path(), &sysroot_libdir.join(&filename));
942 copy_codegen_backends_to_sysroot(builder,
945 if let Some(lld_install) = lld_install {
946 copy_lld_to_sysroot(builder, target_compiler, &lld_install);
949 // Link the compiler binary itself into place
950 let out_dir = build.cargo_out(build_compiler, Mode::Librustc, host);
951 let rustc = out_dir.join(exe("rustc", &*host));
952 let bindir = sysroot.join("bin");
953 t!(fs::create_dir_all(&bindir));
954 let compiler = builder.rustc(target_compiler);
955 let _ = fs::remove_file(&compiler);
956 copy(&rustc, &compiler);
962 /// Link some files into a rustc sysroot.
964 /// For a particular stage this will link the file listed in `stamp` into the
965 /// `sysroot_dst` provided.
966 pub fn add_to_sysroot(sysroot_dst: &Path, stamp: &Path) {
967 t!(fs::create_dir_all(&sysroot_dst));
968 for path in read_stamp_file(stamp) {
969 copy(&path, &sysroot_dst.join(path.file_name().unwrap()));
973 // Avoiding a dependency on winapi to keep compile times down
975 fn stderr_isatty() -> bool {
977 unsafe { libc::isatty(libc::STDERR_FILENO) != 0 }
980 fn stderr_isatty() -> bool {
983 type HANDLE = *mut u8;
984 const STD_ERROR_HANDLE: DWORD = -12i32 as DWORD;
986 fn GetStdHandle(which: DWORD) -> HANDLE;
987 fn GetConsoleMode(hConsoleHandle: HANDLE, lpMode: *mut DWORD) -> BOOL;
990 let handle = GetStdHandle(STD_ERROR_HANDLE);
992 GetConsoleMode(handle, &mut out) != 0
996 pub fn run_cargo(build: &Build, cargo: &mut Command, stamp: &Path, is_check: bool)
999 // Instruct Cargo to give us json messages on stdout, critically leaving
1000 // stderr as piped so we can get those pretty colors.
1001 cargo.arg("--message-format").arg("json")
1002 .stdout(Stdio::piped());
1004 if stderr_isatty() && build.ci_env == CiEnv::None {
1005 // since we pass message-format=json to cargo, we need to tell the rustc
1006 // wrapper to give us colored output if necessary. This is because we
1007 // only want Cargo's JSON output, not rustcs.
1008 cargo.env("RUSTC_COLOR", "1");
1011 build.verbose(&format!("running: {:?}", cargo));
1012 let mut child = match cargo.spawn() {
1014 Err(e) => panic!("failed to execute command: {:?}\nerror: {}", cargo, e),
1017 // `target_root_dir` looks like $dir/$target/release
1018 let target_root_dir = stamp.parent().unwrap();
1019 // `target_deps_dir` looks like $dir/$target/release/deps
1020 let target_deps_dir = target_root_dir.join("deps");
1021 // `host_root_dir` looks like $dir/release
1022 let host_root_dir = target_root_dir.parent().unwrap() // chop off `release`
1023 .parent().unwrap() // chop off `$target`
1024 .join(target_root_dir.file_name().unwrap());
1026 // Spawn Cargo slurping up its JSON output. We'll start building up the
1027 // `deps` array of all files it generated along with a `toplevel` array of
1028 // files we need to probe for later.
1029 let mut deps = Vec::new();
1030 let mut toplevel = Vec::new();
1031 let stdout = BufReader::new(child.stdout.take().unwrap());
1032 for line in stdout.lines() {
1033 let line = t!(line);
1034 let json: serde_json::Value = if line.starts_with("{") {
1035 t!(serde_json::from_str(&line))
1037 // If this was informational, just print it out and continue
1038 println!("{}", line);
1041 if json["reason"].as_str() != Some("compiler-artifact") {
1042 if build.config.rustc_error_format.as_ref().map_or(false, |e| e == "json") {
1043 // most likely not a cargo message, so let's send it out as well
1044 println!("{}", line);
1048 for filename in json["filenames"].as_array().unwrap() {
1049 let filename = filename.as_str().unwrap();
1050 // Skip files like executables
1051 if !filename.ends_with(".rlib") &&
1052 !filename.ends_with(".lib") &&
1053 !is_dylib(&filename) &&
1054 !(is_check && filename.ends_with(".rmeta")) {
1058 let filename = Path::new(filename);
1060 // If this was an output file in the "host dir" we don't actually
1061 // worry about it, it's not relevant for us.
1062 if filename.starts_with(&host_root_dir) {
1066 // If this was output in the `deps` dir then this is a precise file
1067 // name (hash included) so we start tracking it.
1068 if filename.starts_with(&target_deps_dir) {
1069 deps.push(filename.to_path_buf());
1073 // Otherwise this was a "top level artifact" which right now doesn't
1074 // have a hash in the name, but there's a version of this file in
1075 // the `deps` folder which *does* have a hash in the name. That's
1076 // the one we'll want to we'll probe for it later.
1078 // We do not use `Path::file_stem` or `Path::extension` here,
1079 // because some generated files may have multiple extensions e.g.
1080 // `std-<hash>.dll.lib` on Windows. The aforementioned methods only
1081 // split the file name by the last extension (`.lib`) while we need
1082 // to split by all extensions (`.dll.lib`).
1083 let expected_len = t!(filename.metadata()).len();
1084 let filename = filename.file_name().unwrap().to_str().unwrap();
1085 let mut parts = filename.splitn(2, '.');
1086 let file_stem = parts.next().unwrap().to_owned();
1087 let extension = parts.next().unwrap().to_owned();
1089 toplevel.push((file_stem, extension, expected_len));
1093 // Make sure Cargo actually succeeded after we read all of its stdout.
1094 let status = t!(child.wait());
1095 if !status.success() {
1096 panic!("command did not execute successfully: {:?}\n\
1097 expected success, got: {}",
1102 // Ok now we need to actually find all the files listed in `toplevel`. We've
1103 // got a list of prefix/extensions and we basically just need to find the
1104 // most recent file in the `deps` folder corresponding to each one.
1105 let contents = t!(target_deps_dir.read_dir())
1107 .map(|e| (e.path(), e.file_name().into_string().unwrap(), t!(e.metadata())))
1108 .collect::<Vec<_>>();
1109 for (prefix, extension, expected_len) in toplevel {
1110 let candidates = contents.iter().filter(|&&(_, ref filename, ref meta)| {
1111 filename.starts_with(&prefix[..]) &&
1112 filename[prefix.len()..].starts_with("-") &&
1113 filename.ends_with(&extension[..]) &&
1114 meta.len() == expected_len
1116 let max = candidates.max_by_key(|&&(_, _, ref metadata)| {
1117 FileTime::from_last_modification_time(metadata)
1119 let path_to_add = match max {
1120 Some(triple) => triple.0.to_str().unwrap(),
1121 None => panic!("no output generated for {:?} {:?}", prefix, extension),
1123 if is_dylib(path_to_add) {
1124 let candidate = format!("{}.lib", path_to_add);
1125 let candidate = PathBuf::from(candidate);
1126 if candidate.exists() {
1127 deps.push(candidate);
1130 deps.push(path_to_add.into());
1133 // Now we want to update the contents of the stamp file, if necessary. First
1134 // we read off the previous contents along with its mtime. If our new
1135 // contents (the list of files to copy) is different or if any dep's mtime
1136 // is newer then we rewrite the stamp file.
1138 let mut stamp_contents = Vec::new();
1139 if let Ok(mut f) = File::open(stamp) {
1140 t!(f.read_to_end(&mut stamp_contents));
1142 let stamp_mtime = mtime(&stamp);
1143 let mut new_contents = Vec::new();
1145 let mut max_path = None;
1146 for dep in deps.iter() {
1147 let mtime = mtime(dep);
1148 if Some(mtime) > max {
1150 max_path = Some(dep.clone());
1152 new_contents.extend(dep.to_str().unwrap().as_bytes());
1153 new_contents.extend(b"\0");
1155 let max = max.unwrap();
1156 let max_path = max_path.unwrap();
1157 if stamp_contents == new_contents && max <= stamp_mtime {
1158 build.verbose(&format!("not updating {:?}; contents equal and {} <= {}",
1159 stamp, max, stamp_mtime));
1162 if max > stamp_mtime {
1163 build.verbose(&format!("updating {:?} as {:?} changed", stamp, max_path));
1165 build.verbose(&format!("updating {:?} as deps changed", stamp));
1167 t!(t!(File::create(stamp)).write_all(&new_contents));