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Diffstat (limited to 'src/bootstrap/build/compile.rs')
| -rw-r--r-- | src/bootstrap/build/compile.rs | 248 |
1 files changed, 248 insertions, 0 deletions
diff --git a/src/bootstrap/build/compile.rs b/src/bootstrap/build/compile.rs new file mode 100644 index 00000000000..05b444633b4 --- /dev/null +++ b/src/bootstrap/build/compile.rs @@ -0,0 +1,248 @@ +// Copyright 2015 The Rust Project Developers. See the COPYRIGHT +// file at the top-level directory of this distribution and at +// http://rust-lang.org/COPYRIGHT. +// +// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or +// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license +// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your +// option. This file may not be copied, modified, or distributed +// except according to those terms. + +use std::collections::HashMap; +use std::fs; +use std::path::{Path, PathBuf}; +use std::process::Command; + +use build_helper::output; + +use build::util::{exe, staticlib, libdir, mtime, is_dylib}; +use build::{Build, Compiler}; + +/// Build the standard library. +/// +/// This will build the standard library for a particular stage of the build +/// using the `compiler` targeting the `target` architecture. The artifacts +/// created will also be linked into the sysroot directory. +pub fn std<'a>(build: &'a Build, stage: u32, target: &str, + compiler: &Compiler<'a>) { + let host = compiler.host; + println!("Building stage{} std artifacts ({} -> {})", stage, + host, target); + + // Move compiler-rt into place as it'll be required by the compiler when + // building the standard library to link the dylib of libstd + let libdir = build.sysroot_libdir(stage, &host, target); + let _ = fs::remove_dir_all(&libdir); + t!(fs::create_dir_all(&libdir)); + t!(fs::hard_link(&build.compiler_rt_built.borrow()[target], + libdir.join(staticlib("compiler-rt", target)))); + + build_startup_objects(build, target, &libdir); + + let out_dir = build.cargo_out(stage, &host, true, target); + build.clear_if_dirty(&out_dir, &build.compiler_path(compiler)); + let mut cargo = build.cargo(stage, compiler, true, target, "build"); + cargo.arg("--features").arg(build.std_features()) + .arg("--manifest-path") + .arg(build.src.join("src/rustc/std_shim/Cargo.toml")); + + if let Some(target) = build.config.target_config.get(target) { + if let Some(ref jemalloc) = target.jemalloc { + cargo.env("JEMALLOC_OVERRIDE", jemalloc); + } + } + if let Some(ref p) = build.config.musl_root { + if target.contains("musl") { + cargo.env("MUSL_ROOT", p); + } + } + + build.run(&mut cargo); + add_to_sysroot(&out_dir, &libdir); +} + +/// Build and prepare startup objects like rsbegin.o and rsend.o +/// +/// These are primarily used on Windows right now for linking executables/dlls. +/// They don't require any library support as they're just plain old object +/// files, so we just use the nightly snapshot compiler to always build them (as +/// no other compilers are guaranteed to be available). +fn build_startup_objects(build: &Build, target: &str, into: &Path) { + if !target.contains("pc-windows-gnu") { + return + } + let compiler = Compiler::new(0, &build.config.build); + let compiler = build.compiler_path(&compiler); + + for file in t!(fs::read_dir(build.src.join("src/rtstartup"))) { + let file = t!(file); + build.run(Command::new(&compiler) + .arg("--emit=obj") + .arg("--out-dir").arg(into) + .arg(file.path())); + } + + for obj in ["crt2.o", "dllcrt2.o"].iter() { + t!(fs::copy(compiler_file(build.cc(target), obj), into.join(obj))); + } +} + +/// Build the compiler. +/// +/// This will build the compiler for a particular stage of the build using +/// the `compiler` targeting the `target` architecture. The artifacts +/// created will also be linked into the sysroot directory. +pub fn rustc<'a>(build: &'a Build, stage: u32, target: &str, + compiler: &Compiler<'a>) { + let host = compiler.host; + println!("Building stage{} compiler artifacts ({} -> {})", stage, + host, target); + + let out_dir = build.cargo_out(stage, &host, false, target); + let rustc = out_dir.join(exe("rustc", target)); + build.clear_if_dirty(&out_dir, &libstd_shim(build, stage, &host, target)); + + let mut cargo = build.cargo(stage, compiler, false, target, "build"); + cargo.arg("--features").arg(build.rustc_features(stage)) + .arg("--manifest-path") + .arg(build.src.join("src/rustc/Cargo.toml")); + + // In stage0 we may not need to build as many executables + if stage == 0 { + cargo.arg("--bin").arg("rustc"); + } + + // Set some configuration variables picked up by build scripts and + // the compiler alike + cargo.env("CFG_RELEASE", &build.release) + .env("CFG_RELEASE_CHANNEL", &build.config.channel) + .env("CFG_VERSION", &build.version) + .env("CFG_BOOTSTRAP_KEY", &build.bootstrap_key) + .env("RUSTC_BOOTSTRAP_KEY", &build.bootstrap_key) + .env("CFG_LIBDIR_RELATIVE", "lib"); + + if let Some(ref ver_date) = build.ver_date { + cargo.env("CFG_VER_DATE", ver_date); + } + if let Some(ref ver_hash) = build.ver_hash { + cargo.env("CFG_VER_HASH", ver_hash); + } + if !build.unstable_features { + cargo.env("CFG_DISABLE_UNSTABLE_FEATURES", "1"); + } + if let Some(config) = build.config.target_config.get(target) { + if let Some(ref s) = config.llvm_config { + cargo.env("LLVM_CONFIG", s); + } + } + if build.config.llvm_static_stdcpp { + cargo.env("LLVM_STATIC_STDCPP", + compiler_file(build.cxx(target), "libstdc++.a")); + } + if let Some(ref s) = build.config.rustc_default_linker { + cargo.env("CFG_DEFAULT_LINKER", s); + } + if let Some(ref s) = build.config.rustc_default_ar { + cargo.env("CFG_DEFAULT_AR", s); + } + build.run(&mut cargo); + + let sysroot_libdir = build.sysroot_libdir(stage, host, target); + add_to_sysroot(&out_dir, &sysroot_libdir); + + if host == target { + assemble_compiler(build, stage, target, &rustc); + } +} + +/// Cargo's output path for the standard library in a given stage, compiled +/// by a particular compiler for the specified target. +fn libstd_shim(build: &Build, stage: u32, host: &str, target: &str) -> PathBuf { + build.cargo_out(stage, host, true, target).join("libstd_shim.rlib") +} + +fn compiler_file(compiler: &Path, file: &str) -> String { + output(Command::new(compiler) + .arg(format!("-print-file-name={}", file))).trim().to_string() +} + +/// Prepare a new compiler from the artifacts in `stage` +/// +/// This will link the compiler built by `host` during the stage +/// specified to the sysroot location for `host` to be the official +/// `stage + 1` compiler for that host. This means that the `rustc` binary +/// itself will be linked into place along with all supporting dynamic +/// libraries. +fn assemble_compiler(build: &Build, stage: u32, host: &str, rustc: &Path) { + // Clear out old files + let sysroot = build.sysroot(stage + 1, host); + let _ = fs::remove_dir_all(&sysroot); + t!(fs::create_dir_all(&sysroot)); + + // Link in all dylibs to the libdir + let sysroot_libdir = sysroot.join(libdir(host)); + t!(fs::create_dir_all(&sysroot_libdir)); + let src_libdir = build.sysroot_libdir(stage, host, host); + for f in t!(fs::read_dir(&src_libdir)).map(|f| t!(f)) { + let filename = f.file_name().into_string().unwrap(); + if is_dylib(&filename) { + t!(fs::hard_link(&f.path(), sysroot_libdir.join(&filename))); + } + } + + // Link the compiler binary itself into place + let bindir = sysroot.join("bin"); + t!(fs::create_dir_all(&bindir)); + let compiler = build.compiler_path(&Compiler::new(stage + 1, host)); + let _ = fs::remove_file(&compiler); + t!(fs::hard_link(rustc, compiler)); + + // See if rustdoc exists to link it into place + let exe = exe("rustdoc", host); + let rustdoc_src = rustc.parent().unwrap().join(&exe); + let rustdoc_dst = bindir.join(exe); + if fs::metadata(&rustdoc_src).is_ok() { + let _ = fs::remove_file(&rustdoc_dst); + t!(fs::hard_link(&rustdoc_src, &rustdoc_dst)); + } +} + +/// Link some files into a rustc sysroot. +/// +/// For a particular stage this will link all of the contents of `out_dir` +/// into the sysroot of the `host` compiler, assuming the artifacts are +/// compiled for the specified `target`. +fn add_to_sysroot(out_dir: &Path, sysroot_dst: &Path) { + // Collect the set of all files in the dependencies directory, keyed + // off the name of the library. We assume everything is of the form + // `foo-<hash>.{rlib,so,...}`, and there could be multiple different + // `<hash>` values for the same name (of old builds). + let mut map = HashMap::new(); + for file in t!(fs::read_dir(out_dir.join("deps"))).map(|f| t!(f)) { + let filename = file.file_name().into_string().unwrap(); + + // We're only interested in linking rlibs + dylibs, other things like + // unit tests don't get linked in + if !filename.ends_with(".rlib") && + !filename.ends_with(".lib") && + !is_dylib(&filename) { + continue + } + let file = file.path(); + let dash = filename.find("-").unwrap(); + let key = (filename[..dash].to_string(), + file.extension().unwrap().to_owned()); + map.entry(key).or_insert(Vec::new()) + .push(file.clone()); + } + + // For all hash values found, pick the most recent one to move into the + // sysroot, that should be the one we just built. + for (_, paths) in map { + let (_, path) = paths.iter().map(|path| { + (mtime(&path).seconds(), path) + }).max().unwrap(); + t!(fs::hard_link(&path, + sysroot_dst.join(path.file_name().unwrap()))); + } +} |