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};
33 use {Build, Compiler, Mode};
36 use cache::{INTERNER, Interned};
37 use builder::{Step, RunConfig, ShouldRun, Builder};
39 #[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
41 pub target: Interned<String>,
42 pub compiler: Compiler,
47 const DEFAULT: bool = true;
49 fn should_run(run: ShouldRun) -> ShouldRun {
50 run.path("src/libstd").krate("std")
53 fn make_run(run: RunConfig) {
54 run.builder.ensure(Std {
55 compiler: run.builder.compiler(run.builder.top_stage, run.host),
60 /// Build the standard library.
62 /// This will build the standard library for a particular stage of the build
63 /// using the `compiler` targeting the `target` architecture. The artifacts
64 /// created will also be linked into the sysroot directory.
65 fn run(self, builder: &Builder) {
66 let build = builder.build;
67 let target = self.target;
68 let compiler = self.compiler;
70 builder.ensure(StartupObjects { compiler, target });
72 if build.force_use_stage1(compiler, target) {
73 let from = builder.compiler(1, build.build);
78 println!("Uplifting stage1 std ({} -> {})", from.host, target);
79 builder.ensure(StdLink {
81 target_compiler: compiler,
87 let _folder = build.fold_output(|| format!("stage{}-std", compiler.stage));
88 println!("Building stage{} std artifacts ({} -> {})", compiler.stage,
89 &compiler.host, target);
91 let out_dir = build.cargo_out(compiler, Mode::Libstd, target);
92 build.clear_if_dirty(&out_dir, &builder.rustc(compiler));
93 let mut cargo = builder.cargo(compiler, Mode::Libstd, target, "build");
94 std_cargo(build, &compiler, target, &mut cargo);
97 &libstd_stamp(build, compiler, target));
99 builder.ensure(StdLink {
100 compiler: builder.compiler(compiler.stage, build.build),
101 target_compiler: compiler,
107 /// Configure cargo to compile the standard library, adding appropriate env vars
109 pub fn std_cargo(build: &Build,
111 target: Interned<String>,
112 cargo: &mut Command) {
113 let mut features = build.std_features();
115 if let Some(target) = env::var_os("MACOSX_STD_DEPLOYMENT_TARGET") {
116 cargo.env("MACOSX_DEPLOYMENT_TARGET", target);
119 // When doing a local rebuild we tell cargo that we're stage1 rather than
120 // stage0. This works fine if the local rust and being-built rust have the
121 // same view of what the default allocator is, but fails otherwise. Since
122 // we don't have a way to express an allocator preference yet, work
123 // around the issue in the case of a local rebuild with jemalloc disabled.
124 if compiler.stage == 0 && build.local_rebuild && !build.config.use_jemalloc {
125 features.push_str(" force_alloc_system");
128 if compiler.stage != 0 && build.config.sanitizers {
129 // This variable is used by the sanitizer runtime crates, e.g.
130 // rustc_lsan, to build the sanitizer runtime from C code
131 // When this variable is missing, those crates won't compile the C code,
132 // so we don't set this variable during stage0 where llvm-config is
134 // We also only build the runtimes when --enable-sanitizers (or its
135 // config.toml equivalent) is used
136 cargo.env("LLVM_CONFIG", build.llvm_config(target));
139 cargo.arg("--features").arg(features)
140 .arg("--manifest-path")
141 .arg(build.src.join("src/libstd/Cargo.toml"));
143 if let Some(target) = build.config.target_config.get(&target) {
144 if let Some(ref jemalloc) = target.jemalloc {
145 cargo.env("JEMALLOC_OVERRIDE", jemalloc);
148 if target.contains("musl") {
149 if let Some(p) = build.musl_root(target) {
150 cargo.env("MUSL_ROOT", p);
155 #[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
157 pub compiler: Compiler,
158 pub target_compiler: Compiler,
159 pub target: Interned<String>,
162 impl Step for StdLink {
165 fn should_run(run: ShouldRun) -> ShouldRun {
169 /// Link all libstd rlibs/dylibs into the sysroot location.
171 /// Links those artifacts generated by `compiler` to a the `stage` compiler's
172 /// sysroot for the specified `host` and `target`.
174 /// Note that this assumes that `compiler` has already generated the libstd
175 /// libraries for `target`, and this method will find them in the relevant
176 /// output directory.
177 fn run(self, builder: &Builder) {
178 let build = builder.build;
179 let compiler = self.compiler;
180 let target_compiler = self.target_compiler;
181 let target = self.target;
182 println!("Copying stage{} std from stage{} ({} -> {} / {})",
183 target_compiler.stage,
186 target_compiler.host,
188 let libdir = builder.sysroot_libdir(target_compiler, target);
189 add_to_sysroot(&libdir, &libstd_stamp(build, compiler, target));
191 if target.contains("musl") && !target.contains("mips") {
192 copy_musl_third_party_objects(build, target, &libdir);
195 if build.config.sanitizers && compiler.stage != 0 && target == "x86_64-apple-darwin" {
196 // The sanitizers are only built in stage1 or above, so the dylibs will
197 // be missing in stage0 and causes panic. See the `std()` function above
198 // for reason why the sanitizers are not built in stage0.
199 copy_apple_sanitizer_dylibs(&build.native_dir(target), "osx", &libdir);
204 /// Copies the crt(1,i,n).o startup objects
206 /// Only required for musl targets that statically link to libc
207 fn copy_musl_third_party_objects(build: &Build, target: Interned<String>, into: &Path) {
208 for &obj in &["crt1.o", "crti.o", "crtn.o"] {
209 copy(&build.musl_root(target).unwrap().join("lib").join(obj), &into.join(obj));
213 fn copy_apple_sanitizer_dylibs(native_dir: &Path, platform: &str, into: &Path) {
214 for &sanitizer in &["asan", "tsan"] {
215 let filename = format!("libclang_rt.{}_{}_dynamic.dylib", sanitizer, platform);
216 let mut src_path = native_dir.join(sanitizer);
217 src_path.push("build");
218 src_path.push("lib");
219 src_path.push("darwin");
220 src_path.push(&filename);
221 copy(&src_path, &into.join(filename));
225 #[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
226 pub struct StartupObjects {
227 pub compiler: Compiler,
228 pub target: Interned<String>,
231 impl Step for StartupObjects {
234 fn should_run(run: ShouldRun) -> ShouldRun {
235 run.path("src/rtstartup")
238 fn make_run(run: RunConfig) {
239 run.builder.ensure(StartupObjects {
240 compiler: run.builder.compiler(run.builder.top_stage, run.host),
245 /// Build and prepare startup objects like rsbegin.o and rsend.o
247 /// These are primarily used on Windows right now for linking executables/dlls.
248 /// They don't require any library support as they're just plain old object
249 /// files, so we just use the nightly snapshot compiler to always build them (as
250 /// no other compilers are guaranteed to be available).
251 fn run(self, builder: &Builder) {
252 let build = builder.build;
253 let for_compiler = self.compiler;
254 let target = self.target;
255 if !target.contains("pc-windows-gnu") {
259 let src_dir = &build.src.join("src/rtstartup");
260 let dst_dir = &build.native_dir(target).join("rtstartup");
261 let sysroot_dir = &builder.sysroot_libdir(for_compiler, target);
262 t!(fs::create_dir_all(dst_dir));
264 for file in &["rsbegin", "rsend"] {
265 let src_file = &src_dir.join(file.to_string() + ".rs");
266 let dst_file = &dst_dir.join(file.to_string() + ".o");
267 if !up_to_date(src_file, dst_file) {
268 let mut cmd = Command::new(&build.initial_rustc);
269 build.run(cmd.env("RUSTC_BOOTSTRAP", "1")
270 .arg("--cfg").arg("stage0")
271 .arg("--target").arg(target)
273 .arg("-o").arg(dst_file)
277 copy(dst_file, &sysroot_dir.join(file.to_string() + ".o"));
280 for obj in ["crt2.o", "dllcrt2.o"].iter() {
281 copy(&compiler_file(build.cc(target), obj), &sysroot_dir.join(obj));
286 #[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
288 pub compiler: Compiler,
289 pub target: Interned<String>,
294 const DEFAULT: bool = true;
296 fn should_run(run: ShouldRun) -> ShouldRun {
297 run.path("src/libtest").krate("test")
300 fn make_run(run: RunConfig) {
301 run.builder.ensure(Test {
302 compiler: run.builder.compiler(run.builder.top_stage, run.host),
309 /// This will build libtest and supporting libraries for a particular stage of
310 /// the build using the `compiler` targeting the `target` architecture. The
311 /// artifacts created will also be linked into the sysroot directory.
312 fn run(self, builder: &Builder) {
313 let build = builder.build;
314 let target = self.target;
315 let compiler = self.compiler;
317 builder.ensure(Std { compiler, target });
319 if build.force_use_stage1(compiler, target) {
320 builder.ensure(Test {
321 compiler: builder.compiler(1, build.build),
324 println!("Uplifting stage1 test ({} -> {})", &build.build, target);
325 builder.ensure(TestLink {
326 compiler: builder.compiler(1, build.build),
327 target_compiler: compiler,
333 let _folder = build.fold_output(|| format!("stage{}-test", compiler.stage));
334 println!("Building stage{} test artifacts ({} -> {})", compiler.stage,
335 &compiler.host, target);
336 let out_dir = build.cargo_out(compiler, Mode::Libtest, target);
337 build.clear_if_dirty(&out_dir, &libstd_stamp(build, compiler, target));
338 let mut cargo = builder.cargo(compiler, Mode::Libtest, target, "build");
339 test_cargo(build, &compiler, target, &mut cargo);
342 &libtest_stamp(build, compiler, target));
344 builder.ensure(TestLink {
345 compiler: builder.compiler(compiler.stage, build.build),
346 target_compiler: compiler,
352 /// Same as `std_cargo`, but for libtest
353 pub fn test_cargo(build: &Build,
354 _compiler: &Compiler,
355 _target: Interned<String>,
356 cargo: &mut Command) {
357 if let Some(target) = env::var_os("MACOSX_STD_DEPLOYMENT_TARGET") {
358 cargo.env("MACOSX_DEPLOYMENT_TARGET", target);
360 cargo.arg("--manifest-path")
361 .arg(build.src.join("src/libtest/Cargo.toml"));
364 #[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
365 pub struct TestLink {
366 pub compiler: Compiler,
367 pub target_compiler: Compiler,
368 pub target: Interned<String>,
371 impl Step for TestLink {
374 fn should_run(run: ShouldRun) -> ShouldRun {
378 /// Same as `std_link`, only for libtest
379 fn run(self, builder: &Builder) {
380 let build = builder.build;
381 let compiler = self.compiler;
382 let target_compiler = self.target_compiler;
383 let target = self.target;
384 println!("Copying stage{} test from stage{} ({} -> {} / {})",
385 target_compiler.stage,
388 target_compiler.host,
390 add_to_sysroot(&builder.sysroot_libdir(target_compiler, target),
391 &libtest_stamp(build, compiler, target));
395 #[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
397 pub compiler: Compiler,
398 pub target: Interned<String>,
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.path("src/librustc").krate("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 /// Build 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 build = builder.build;
424 let compiler = self.compiler;
425 let target = self.target;
427 builder.ensure(Test { compiler, target });
429 // Build LLVM for our target. This will implicitly build the host LLVM
431 builder.ensure(native::Llvm { target });
433 if build.force_use_stage1(compiler, target) {
434 builder.ensure(Rustc {
435 compiler: builder.compiler(1, build.build),
438 println!("Uplifting stage1 rustc ({} -> {})", &build.build, target);
439 builder.ensure(RustcLink {
440 compiler: builder.compiler(1, build.build),
441 target_compiler: compiler,
447 // Ensure that build scripts have a std to link against.
449 compiler: builder.compiler(self.compiler.stage, build.build),
453 let _folder = build.fold_output(|| format!("stage{}-rustc", compiler.stage));
454 println!("Building stage{} compiler artifacts ({} -> {})",
455 compiler.stage, &compiler.host, target);
457 let out_dir = build.cargo_out(compiler, Mode::Librustc, target);
458 build.clear_if_dirty(&out_dir, &libtest_stamp(build, compiler, target));
460 let mut cargo = builder.cargo(compiler, Mode::Librustc, target, "build");
461 rustc_cargo(build, &compiler, target, &mut cargo);
464 &librustc_stamp(build, compiler, target));
466 builder.ensure(RustcLink {
467 compiler: builder.compiler(compiler.stage, build.build),
468 target_compiler: compiler,
474 /// Same as `std_cargo`, but for libtest
475 pub fn rustc_cargo(build: &Build,
477 target: Interned<String>,
478 cargo: &mut Command) {
479 cargo.arg("--features").arg(build.rustc_features())
480 .arg("--manifest-path")
481 .arg(build.src.join("src/rustc/Cargo.toml"));
483 // Set some configuration variables picked up by build scripts and
484 // the compiler alike
485 cargo.env("CFG_RELEASE", build.rust_release())
486 .env("CFG_RELEASE_CHANNEL", &build.config.channel)
487 .env("CFG_VERSION", build.rust_version())
488 .env("CFG_PREFIX", build.config.prefix.clone().unwrap_or_default());
490 if compiler.stage == 0 {
491 cargo.env("CFG_LIBDIR_RELATIVE", "lib");
493 let libdir_relative =
494 build.config.libdir_relative.clone().unwrap_or(PathBuf::from("lib"));
495 cargo.env("CFG_LIBDIR_RELATIVE", libdir_relative);
498 // If we're not building a compiler with debugging information then remove
499 // these two env vars which would be set otherwise.
500 if build.config.rust_debuginfo_only_std {
501 cargo.env_remove("RUSTC_DEBUGINFO");
502 cargo.env_remove("RUSTC_DEBUGINFO_LINES");
505 if let Some(ref ver_date) = build.rust_info.commit_date() {
506 cargo.env("CFG_VER_DATE", ver_date);
508 if let Some(ref ver_hash) = build.rust_info.sha() {
509 cargo.env("CFG_VER_HASH", ver_hash);
511 if !build.unstable_features() {
512 cargo.env("CFG_DISABLE_UNSTABLE_FEATURES", "1");
514 // Flag that rust llvm is in use
515 if build.is_rust_llvm(target) {
516 cargo.env("LLVM_RUSTLLVM", "1");
518 cargo.env("LLVM_CONFIG", build.llvm_config(target));
519 let target_config = build.config.target_config.get(&target);
520 if let Some(s) = target_config.and_then(|c| c.llvm_config.as_ref()) {
521 cargo.env("CFG_LLVM_ROOT", s);
523 // Building with a static libstdc++ is only supported on linux right now,
524 // not for MSVC or macOS
525 if build.config.llvm_static_stdcpp &&
526 !target.contains("windows") &&
527 !target.contains("apple") {
528 cargo.env("LLVM_STATIC_STDCPP",
529 compiler_file(build.cxx(target).unwrap(), "libstdc++.a"));
531 if build.config.llvm_link_shared {
532 cargo.env("LLVM_LINK_SHARED", "1");
534 if let Some(ref s) = build.config.rustc_default_linker {
535 cargo.env("CFG_DEFAULT_LINKER", s);
537 if let Some(ref s) = build.config.rustc_default_ar {
538 cargo.env("CFG_DEFAULT_AR", s);
542 #[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
544 pub compiler: Compiler,
545 pub target_compiler: Compiler,
546 pub target: Interned<String>,
549 impl Step for RustcLink {
552 fn should_run(run: ShouldRun) -> ShouldRun {
556 /// Same as `std_link`, only for librustc
557 fn run(self, builder: &Builder) {
558 let build = builder.build;
559 let compiler = self.compiler;
560 let target_compiler = self.target_compiler;
561 let target = self.target;
562 println!("Copying stage{} rustc from stage{} ({} -> {} / {})",
563 target_compiler.stage,
566 target_compiler.host,
568 add_to_sysroot(&builder.sysroot_libdir(target_compiler, target),
569 &librustc_stamp(build, compiler, target));
573 /// Cargo's output path for the standard library in a given stage, compiled
574 /// by a particular compiler for the specified target.
575 pub fn libstd_stamp(build: &Build, compiler: Compiler, target: Interned<String>) -> PathBuf {
576 build.cargo_out(compiler, Mode::Libstd, target).join(".libstd.stamp")
579 /// Cargo's output path for libtest in a given stage, compiled by a particular
580 /// compiler for the specified target.
581 pub fn libtest_stamp(build: &Build, compiler: Compiler, target: Interned<String>) -> PathBuf {
582 build.cargo_out(compiler, Mode::Libtest, target).join(".libtest.stamp")
585 /// Cargo's output path for librustc in a given stage, compiled by a particular
586 /// compiler for the specified target.
587 pub fn librustc_stamp(build: &Build, compiler: Compiler, target: Interned<String>) -> PathBuf {
588 build.cargo_out(compiler, Mode::Librustc, target).join(".librustc.stamp")
591 fn compiler_file(compiler: &Path, file: &str) -> PathBuf {
592 let out = output(Command::new(compiler)
593 .arg(format!("-print-file-name={}", file)));
594 PathBuf::from(out.trim())
597 #[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
599 pub compiler: Compiler,
602 impl Step for Sysroot {
603 type Output = Interned<PathBuf>;
605 fn should_run(run: ShouldRun) -> ShouldRun {
609 /// Returns the sysroot for the `compiler` specified that *this build system
612 /// That is, the sysroot for the stage0 compiler is not what the compiler
613 /// thinks it is by default, but it's the same as the default for stages
615 fn run(self, builder: &Builder) -> Interned<PathBuf> {
616 let build = builder.build;
617 let compiler = self.compiler;
618 let sysroot = if compiler.stage == 0 {
619 build.out.join(&compiler.host).join("stage0-sysroot")
621 build.out.join(&compiler.host).join(format!("stage{}", compiler.stage))
623 let _ = fs::remove_dir_all(&sysroot);
624 t!(fs::create_dir_all(&sysroot));
625 INTERNER.intern_path(sysroot)
629 #[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
630 pub struct Assemble {
631 /// The compiler which we will produce in this step. Assemble itself will
632 /// take care of ensuring that the necessary prerequisites to do so exist,
633 /// that is, this target can be a stage2 compiler and Assemble will build
634 /// previous stages for you.
635 pub target_compiler: Compiler,
638 impl Step for Assemble {
639 type Output = Compiler;
641 fn should_run(run: ShouldRun) -> ShouldRun {
642 run.path("src/rustc")
645 /// Prepare a new compiler from the artifacts in `stage`
647 /// This will assemble a compiler in `build/$host/stage$stage`. The compiler
648 /// must have been previously produced by the `stage - 1` build.build
650 fn run(self, builder: &Builder) -> Compiler {
651 let build = builder.build;
652 let target_compiler = self.target_compiler;
654 if target_compiler.stage == 0 {
655 assert_eq!(build.build, target_compiler.host,
656 "Cannot obtain compiler for non-native build triple at stage 0");
657 // The stage 0 compiler for the build triple is always pre-built.
658 return target_compiler;
661 // Get the compiler that we'll use to bootstrap ourselves.
662 let build_compiler = if target_compiler.host != build.build {
663 // Build a compiler for the host platform. We cannot use the stage0
664 // compiler for the host platform for this because it doesn't have
665 // the libraries we need. FIXME: Perhaps we should download those
666 // libraries? It would make builds faster...
667 // FIXME: It may be faster if we build just a stage 1
668 // compiler and then use that to bootstrap this compiler
670 builder.compiler(target_compiler.stage - 1, build.build)
672 // Build the compiler we'll use to build the stage requested. This
673 // may build more than one compiler (going down to stage 0).
674 builder.compiler(target_compiler.stage - 1, target_compiler.host)
677 // Build the libraries for this compiler to link to (i.e., the libraries
678 // it uses at runtime). NOTE: Crates the target compiler compiles don't
679 // link to these. (FIXME: Is that correct? It seems to be correct most
680 // of the time but I think we do link to these for stage2/bin compilers
681 // when not performing a full bootstrap).
682 if builder.build.flags.keep_stage.map_or(false, |s| target_compiler.stage <= s) {
683 builder.verbose("skipping compilation of compiler due to --keep-stage");
684 let compiler = build_compiler;
685 for stage in 0..min(target_compiler.stage, builder.flags.keep_stage.unwrap()) {
686 let target_compiler = builder.compiler(stage, target_compiler.host);
687 let target = target_compiler.host;
688 builder.ensure(StdLink { compiler, target_compiler, target });
689 builder.ensure(TestLink { compiler, target_compiler, target });
690 builder.ensure(RustcLink { compiler, target_compiler, target });
693 builder.ensure(Rustc { compiler: build_compiler, target: target_compiler.host });
696 let stage = target_compiler.stage;
697 let host = target_compiler.host;
698 println!("Assembling stage{} compiler ({})", stage, host);
700 // Link in all dylibs to the libdir
701 let sysroot = builder.sysroot(target_compiler);
702 let sysroot_libdir = sysroot.join(libdir(&*host));
703 t!(fs::create_dir_all(&sysroot_libdir));
704 let src_libdir = builder.sysroot_libdir(build_compiler, host);
705 for f in t!(fs::read_dir(&src_libdir)).map(|f| t!(f)) {
706 let filename = f.file_name().into_string().unwrap();
707 if is_dylib(&filename) {
708 copy(&f.path(), &sysroot_libdir.join(&filename));
712 let out_dir = build.cargo_out(build_compiler, Mode::Librustc, host);
714 // Link the compiler binary itself into place
715 let rustc = out_dir.join(exe("rustc", &*host));
716 let bindir = sysroot.join("bin");
717 t!(fs::create_dir_all(&bindir));
718 let compiler = builder.rustc(target_compiler);
719 let _ = fs::remove_file(&compiler);
720 copy(&rustc, &compiler);
722 // See if rustdoc exists to link it into place
723 let rustdoc = exe("rustdoc", &*host);
724 let rustdoc_src = out_dir.join(&rustdoc);
725 let rustdoc_dst = bindir.join(&rustdoc);
726 if fs::metadata(&rustdoc_src).is_ok() {
727 let _ = fs::remove_file(&rustdoc_dst);
728 copy(&rustdoc_src, &rustdoc_dst);
735 /// Link some files into a rustc sysroot.
737 /// For a particular stage this will link the file listed in `stamp` into the
738 /// `sysroot_dst` provided.
739 fn add_to_sysroot(sysroot_dst: &Path, stamp: &Path) {
740 t!(fs::create_dir_all(&sysroot_dst));
741 let mut contents = Vec::new();
742 t!(t!(File::open(stamp)).read_to_end(&mut contents));
743 // This is the method we use for extracting paths from the stamp file passed to us. See
744 // run_cargo for more information (in this file).
745 for part in contents.split(|b| *b == 0) {
749 let path = Path::new(t!(str::from_utf8(part)));
750 copy(&path, &sysroot_dst.join(path.file_name().unwrap()));
754 // Avoiding a dependency on winapi to keep compile times down
756 fn stderr_isatty() -> bool {
758 unsafe { libc::isatty(libc::STDERR_FILENO) != 0 }
761 fn stderr_isatty() -> bool {
764 type HANDLE = *mut u8;
765 const STD_ERROR_HANDLE: DWORD = -12i32 as DWORD;
767 fn GetStdHandle(which: DWORD) -> HANDLE;
768 fn GetConsoleMode(hConsoleHandle: HANDLE, lpMode: *mut DWORD) -> BOOL;
771 let handle = GetStdHandle(STD_ERROR_HANDLE);
773 GetConsoleMode(handle, &mut out) != 0
777 fn run_cargo(build: &Build, cargo: &mut Command, stamp: &Path) {
778 // Instruct Cargo to give us json messages on stdout, critically leaving
779 // stderr as piped so we can get those pretty colors.
780 cargo.arg("--message-format").arg("json")
781 .stdout(Stdio::piped());
784 // since we pass message-format=json to cargo, we need to tell the rustc
785 // wrapper to give us colored output if necessary. This is because we
786 // only want Cargo's JSON output, not rustcs.
787 cargo.env("RUSTC_COLOR", "1");
790 build.verbose(&format!("running: {:?}", cargo));
791 let mut child = match cargo.spawn() {
793 Err(e) => panic!("failed to execute command: {:?}\nerror: {}", cargo, e),
796 // `target_root_dir` looks like $dir/$target/release
797 let target_root_dir = stamp.parent().unwrap();
798 // `target_deps_dir` looks like $dir/$target/release/deps
799 let target_deps_dir = target_root_dir.join("deps");
800 // `host_root_dir` looks like $dir/release
801 let host_root_dir = target_root_dir.parent().unwrap() // chop off `release`
802 .parent().unwrap() // chop off `$target`
803 .join(target_root_dir.file_name().unwrap());
805 // Spawn Cargo slurping up its JSON output. We'll start building up the
806 // `deps` array of all files it generated along with a `toplevel` array of
807 // files we need to probe for later.
808 let mut deps = Vec::new();
809 let mut toplevel = Vec::new();
810 let stdout = BufReader::new(child.stdout.take().unwrap());
811 for line in stdout.lines() {
813 let json: serde_json::Value = if line.starts_with("{") {
814 t!(serde_json::from_str(&line))
816 // If this was informational, just print it out and continue
817 println!("{}", line);
820 if json["reason"].as_str() != Some("compiler-artifact") {
823 for filename in json["filenames"].as_array().unwrap() {
824 let filename = filename.as_str().unwrap();
825 // Skip files like executables
826 if !filename.ends_with(".rlib") &&
827 !filename.ends_with(".lib") &&
828 !is_dylib(&filename) {
832 let filename = Path::new(filename);
834 // If this was an output file in the "host dir" we don't actually
835 // worry about it, it's not relevant for us.
836 if filename.starts_with(&host_root_dir) {
840 // If this was output in the `deps` dir then this is a precise file
841 // name (hash included) so we start tracking it.
842 if filename.starts_with(&target_deps_dir) {
843 deps.push(filename.to_path_buf());
847 // Otherwise this was a "top level artifact" which right now doesn't
848 // have a hash in the name, but there's a version of this file in
849 // the `deps` folder which *does* have a hash in the name. That's
850 // the one we'll want to we'll probe for it later.
851 toplevel.push((filename.file_stem().unwrap()
852 .to_str().unwrap().to_string(),
853 filename.extension().unwrap().to_owned()
854 .to_str().unwrap().to_string()));
858 // Make sure Cargo actually succeeded after we read all of its stdout.
859 let status = t!(child.wait());
860 if !status.success() {
861 panic!("command did not execute successfully: {:?}\n\
862 expected success, got: {}",
867 // Ok now we need to actually find all the files listed in `toplevel`. We've
868 // got a list of prefix/extensions and we basically just need to find the
869 // most recent file in the `deps` folder corresponding to each one.
870 let contents = t!(target_deps_dir.read_dir())
872 .map(|e| (e.path(), e.file_name().into_string().unwrap(), t!(e.metadata())))
873 .collect::<Vec<_>>();
874 for (prefix, extension) in toplevel {
875 let candidates = contents.iter().filter(|&&(_, ref filename, _)| {
876 filename.starts_with(&prefix[..]) &&
877 filename[prefix.len()..].starts_with("-") &&
878 filename.ends_with(&extension[..])
880 let max = candidates.max_by_key(|&&(_, _, ref metadata)| {
881 FileTime::from_last_modification_time(metadata)
883 let path_to_add = match max {
884 Some(triple) => triple.0.to_str().unwrap(),
885 None => panic!("no output generated for {:?} {:?}", prefix, extension),
887 if is_dylib(path_to_add) {
888 let candidate = format!("{}.lib", path_to_add);
889 let candidate = PathBuf::from(candidate);
890 if candidate.exists() {
891 deps.push(candidate);
894 deps.push(path_to_add.into());
897 // Now we want to update the contents of the stamp file, if necessary. First
898 // we read off the previous contents along with its mtime. If our new
899 // contents (the list of files to copy) is different or if any dep's mtime
900 // is newer then we rewrite the stamp file.
902 let mut stamp_contents = Vec::new();
903 if let Ok(mut f) = File::open(stamp) {
904 t!(f.read_to_end(&mut stamp_contents));
906 let stamp_mtime = mtime(&stamp);
907 let mut new_contents = Vec::new();
909 let mut max_path = None;
911 let mtime = mtime(&dep);
912 if Some(mtime) > max {
914 max_path = Some(dep.clone());
916 new_contents.extend(dep.to_str().unwrap().as_bytes());
917 new_contents.extend(b"\0");
919 let max = max.unwrap();
920 let max_path = max_path.unwrap();
921 if stamp_contents == new_contents && max <= stamp_mtime {
924 if max > stamp_mtime {
925 build.verbose(&format!("updating {:?} as {:?} changed", stamp, max_path));
927 build.verbose(&format!("updating {:?} as deps changed", stamp));
929 t!(t!(File::create(stamp)).write_all(&new_contents));