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 use std::collections::HashMap;
13 use std::path::{Path, PathBuf};
14 use std::process::Command;
16 use build_helper::output;
18 use build::util::{exe, staticlib, libdir, mtime, is_dylib};
19 use build::{Build, Compiler};
21 /// Build the standard library.
23 /// This will build the standard library for a particular stage of the build
24 /// using the `compiler` targeting the `target` architecture. The artifacts
25 /// created will also be linked into the sysroot directory.
26 pub fn std<'a>(build: &'a Build, stage: u32, target: &str,
27 compiler: &Compiler<'a>) {
28 let host = compiler.host;
29 println!("Building stage{} std artifacts ({} -> {})", stage,
32 // Move compiler-rt into place as it'll be required by the compiler when
33 // building the standard library to link the dylib of libstd
34 let libdir = build.sysroot_libdir(stage, &host, target);
35 let _ = fs::remove_dir_all(&libdir);
36 t!(fs::create_dir_all(&libdir));
37 t!(fs::hard_link(&build.compiler_rt_built.borrow()[target],
38 libdir.join(staticlib("compiler-rt", target))));
40 build_startup_objects(build, target, &libdir);
42 let out_dir = build.cargo_out(stage, &host, true, target);
43 build.clear_if_dirty(&out_dir, &build.compiler_path(compiler));
44 let mut cargo = build.cargo(stage, compiler, true, target, "build");
45 cargo.arg("--features").arg(build.std_features())
46 .arg("--manifest-path")
47 .arg(build.src.join("src/rustc/std_shim/Cargo.toml"));
49 if let Some(target) = build.config.target_config.get(target) {
50 if let Some(ref jemalloc) = target.jemalloc {
51 cargo.env("JEMALLOC_OVERRIDE", jemalloc);
54 if let Some(ref p) = build.config.musl_root {
55 if target.contains("musl") {
56 cargo.env("MUSL_ROOT", p);
60 build.run(&mut cargo);
61 add_to_sysroot(&out_dir, &libdir);
64 /// Build and prepare startup objects like rsbegin.o and rsend.o
66 /// These are primarily used on Windows right now for linking executables/dlls.
67 /// They don't require any library support as they're just plain old object
68 /// files, so we just use the nightly snapshot compiler to always build them (as
69 /// no other compilers are guaranteed to be available).
70 fn build_startup_objects(build: &Build, target: &str, into: &Path) {
71 if !target.contains("pc-windows-gnu") {
74 let compiler = Compiler::new(0, &build.config.build);
75 let compiler = build.compiler_path(&compiler);
77 for file in t!(fs::read_dir(build.src.join("src/rtstartup"))) {
79 build.run(Command::new(&compiler)
81 .arg("--out-dir").arg(into)
85 for obj in ["crt2.o", "dllcrt2.o"].iter() {
86 t!(fs::copy(compiler_file(build.cc(target), obj), into.join(obj)));
90 /// Build the compiler.
92 /// This will build the compiler for a particular stage of the build using
93 /// the `compiler` targeting the `target` architecture. The artifacts
94 /// created will also be linked into the sysroot directory.
95 pub fn rustc<'a>(build: &'a Build, stage: u32, target: &str,
96 compiler: &Compiler<'a>) {
97 let host = compiler.host;
98 println!("Building stage{} compiler artifacts ({} -> {})", stage,
101 let out_dir = build.cargo_out(stage, &host, false, target);
102 let rustc = out_dir.join(exe("rustc", target));
103 build.clear_if_dirty(&out_dir, &libstd_shim(build, stage, &host, target));
105 let mut cargo = build.cargo(stage, compiler, false, target, "build");
106 cargo.arg("--features").arg(build.rustc_features(stage))
107 .arg("--manifest-path")
108 .arg(build.src.join("src/rustc/Cargo.toml"));
110 // In stage0 we may not need to build as many executables
112 cargo.arg("--bin").arg("rustc");
115 // Set some configuration variables picked up by build scripts and
116 // the compiler alike
117 cargo.env("CFG_RELEASE", &build.release)
118 .env("CFG_RELEASE_CHANNEL", &build.config.channel)
119 .env("CFG_VERSION", &build.version)
120 .env("CFG_BOOTSTRAP_KEY", &build.bootstrap_key)
121 .env("CFG_PREFIX", build.config.prefix.clone().unwrap_or(String::new()))
122 .env("RUSTC_BOOTSTRAP_KEY", &build.bootstrap_key)
123 .env("CFG_LIBDIR_RELATIVE", "lib");
125 if let Some(ref ver_date) = build.ver_date {
126 cargo.env("CFG_VER_DATE", ver_date);
128 if let Some(ref ver_hash) = build.ver_hash {
129 cargo.env("CFG_VER_HASH", ver_hash);
131 if !build.unstable_features {
132 cargo.env("CFG_DISABLE_UNSTABLE_FEATURES", "1");
134 if let Some(config) = build.config.target_config.get(target) {
135 if let Some(ref s) = config.llvm_config {
136 cargo.env("LLVM_CONFIG", s);
139 if build.config.llvm_static_stdcpp {
140 cargo.env("LLVM_STATIC_STDCPP",
141 compiler_file(build.cxx(target), "libstdc++.a"));
143 if let Some(ref s) = build.config.rustc_default_linker {
144 cargo.env("CFG_DEFAULT_LINKER", s);
146 if let Some(ref s) = build.config.rustc_default_ar {
147 cargo.env("CFG_DEFAULT_AR", s);
149 build.run(&mut cargo);
151 let sysroot_libdir = build.sysroot_libdir(stage, host, target);
152 add_to_sysroot(&out_dir, &sysroot_libdir);
155 assemble_compiler(build, stage, target, &rustc);
159 /// Cargo's output path for the standard library in a given stage, compiled
160 /// by a particular compiler for the specified target.
161 fn libstd_shim(build: &Build, stage: u32, host: &str, target: &str) -> PathBuf {
162 build.cargo_out(stage, host, true, target).join("libstd_shim.rlib")
165 fn compiler_file(compiler: &Path, file: &str) -> String {
166 output(Command::new(compiler)
167 .arg(format!("-print-file-name={}", file))).trim().to_string()
170 /// Prepare a new compiler from the artifacts in `stage`
172 /// This will link the compiler built by `host` during the stage
173 /// specified to the sysroot location for `host` to be the official
174 /// `stage + 1` compiler for that host. This means that the `rustc` binary
175 /// itself will be linked into place along with all supporting dynamic
177 fn assemble_compiler(build: &Build, stage: u32, host: &str, rustc: &Path) {
178 // Clear out old files
179 let sysroot = build.sysroot(stage + 1, host);
180 let _ = fs::remove_dir_all(&sysroot);
181 t!(fs::create_dir_all(&sysroot));
183 // Link in all dylibs to the libdir
184 let sysroot_libdir = sysroot.join(libdir(host));
185 t!(fs::create_dir_all(&sysroot_libdir));
186 let src_libdir = build.sysroot_libdir(stage, host, host);
187 for f in t!(fs::read_dir(&src_libdir)).map(|f| t!(f)) {
188 let filename = f.file_name().into_string().unwrap();
189 if is_dylib(&filename) {
190 t!(fs::hard_link(&f.path(), sysroot_libdir.join(&filename)));
194 // Link the compiler binary itself into place
195 let bindir = sysroot.join("bin");
196 t!(fs::create_dir_all(&bindir));
197 let compiler = build.compiler_path(&Compiler::new(stage + 1, host));
198 let _ = fs::remove_file(&compiler);
199 t!(fs::hard_link(rustc, compiler));
201 // See if rustdoc exists to link it into place
202 let exe = exe("rustdoc", host);
203 let rustdoc_src = rustc.parent().unwrap().join(&exe);
204 let rustdoc_dst = bindir.join(exe);
205 if fs::metadata(&rustdoc_src).is_ok() {
206 let _ = fs::remove_file(&rustdoc_dst);
207 t!(fs::hard_link(&rustdoc_src, &rustdoc_dst));
211 /// Link some files into a rustc sysroot.
213 /// For a particular stage this will link all of the contents of `out_dir`
214 /// into the sysroot of the `host` compiler, assuming the artifacts are
215 /// compiled for the specified `target`.
216 fn add_to_sysroot(out_dir: &Path, sysroot_dst: &Path) {
217 // Collect the set of all files in the dependencies directory, keyed
218 // off the name of the library. We assume everything is of the form
219 // `foo-<hash>.{rlib,so,...}`, and there could be multiple different
220 // `<hash>` values for the same name (of old builds).
221 let mut map = HashMap::new();
222 for file in t!(fs::read_dir(out_dir.join("deps"))).map(|f| t!(f)) {
223 let filename = file.file_name().into_string().unwrap();
225 // We're only interested in linking rlibs + dylibs, other things like
226 // unit tests don't get linked in
227 if !filename.ends_with(".rlib") &&
228 !filename.ends_with(".lib") &&
229 !is_dylib(&filename) {
232 let file = file.path();
233 let dash = filename.find("-").unwrap();
234 let key = (filename[..dash].to_string(),
235 file.extension().unwrap().to_owned());
236 map.entry(key).or_insert(Vec::new())
240 // For all hash values found, pick the most recent one to move into the
241 // sysroot, that should be the one we just built.
242 for (_, paths) in map {
243 let (_, path) = paths.iter().map(|path| {
244 (mtime(&path).seconds(), path)
246 t!(fs::hard_link(&path,
247 sysroot_dst.join(path.file_name().unwrap())));