| //! Implementation of compiling various phases of the compiler and standard |
| //! library. |
| //! |
| //! This module contains some of the real meat in the rustbuild build system |
| //! which is where Cargo is used to compiler the standard library, libtest, and |
| //! compiler. This module is also responsible for assembling the sysroot as it |
| //! goes along from the output of the previous stage. |
| |
| use std::borrow::Cow; |
| use std::env; |
| use std::fs; |
| use std::io::BufReader; |
| use std::io::prelude::*; |
| use std::path::{Path, PathBuf}; |
| use std::process::{Command, Stdio, exit}; |
| use std::str; |
| |
| use build_helper::{output, t, up_to_date}; |
| use filetime::FileTime; |
| use serde::Deserialize; |
| use serde_json; |
| |
| use crate::dist; |
| use crate::util::{exe, is_dylib}; |
| use crate::{Compiler, Mode, GitRepo}; |
| use crate::native; |
| |
| use crate::cache::{INTERNER, Interned}; |
| use crate::builder::{Step, RunConfig, ShouldRun, Builder}; |
| |
| #[derive(Debug, PartialOrd, Ord, Copy, Clone, PartialEq, Eq, Hash)] |
| pub struct Std { |
| pub target: Interned<String>, |
| pub compiler: Compiler, |
| } |
| |
| impl Step for Std { |
| type Output = (); |
| const DEFAULT: bool = true; |
| |
| fn should_run(run: ShouldRun<'_>) -> ShouldRun<'_> { |
| run.all_krates("std") |
| } |
| |
| fn make_run(run: RunConfig<'_>) { |
| run.builder.ensure(Std { |
| compiler: run.builder.compiler(run.builder.top_stage, run.host), |
| target: run.target, |
| }); |
| } |
| |
| /// Builds 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. |
| fn run(self, builder: &Builder<'_>) { |
| let target = self.target; |
| let compiler = self.compiler; |
| |
| if builder.config.keep_stage.contains(&compiler.stage) { |
| builder.info("Warning: Using a potentially old libstd. This may not behave well."); |
| builder.ensure(StdLink { |
| compiler, |
| target_compiler: compiler, |
| target, |
| }); |
| return; |
| } |
| |
| builder.ensure(StartupObjects { compiler, target }); |
| |
| let compiler_to_use = builder.compiler_for(compiler.stage, compiler.host, target); |
| if compiler_to_use != compiler { |
| builder.ensure(Std { |
| compiler: compiler_to_use, |
| target, |
| }); |
| builder.info(&format!("Uplifting stage1 std ({} -> {})", compiler_to_use.host, target)); |
| |
| // Even if we're not building std this stage, the new sysroot must |
| // still contain the third party objects needed by various targets. |
| copy_third_party_objects(builder, &compiler, target); |
| |
| builder.ensure(StdLink { |
| compiler: compiler_to_use, |
| target_compiler: compiler, |
| target, |
| }); |
| return; |
| } |
| |
| copy_third_party_objects(builder, &compiler, target); |
| |
| let mut cargo = builder.cargo(compiler, Mode::Std, target, "build"); |
| std_cargo(builder, &compiler, target, &mut cargo); |
| |
| builder.info(&format!("Building stage{} std artifacts ({} -> {})", compiler.stage, |
| &compiler.host, target)); |
| run_cargo(builder, |
| &mut cargo, |
| vec![], |
| &libstd_stamp(builder, compiler, target), |
| false); |
| |
| builder.ensure(StdLink { |
| compiler: builder.compiler(compiler.stage, builder.config.build), |
| target_compiler: compiler, |
| target, |
| }); |
| } |
| } |
| |
| /// Copies third pary objects needed by various targets. |
| fn copy_third_party_objects(builder: &Builder<'_>, compiler: &Compiler, target: Interned<String>) { |
| let libdir = builder.sysroot_libdir(*compiler, target); |
| |
| // Copies the crt(1,i,n).o startup objects |
| // |
| // Since musl supports fully static linking, we can cross link for it even |
| // with a glibc-targeting toolchain, given we have the appropriate startup |
| // files. As those shipped with glibc won't work, copy the ones provided by |
| // musl so we have them on linux-gnu hosts. |
| if target.contains("musl") { |
| for &obj in &["crt1.o", "crti.o", "crtn.o"] { |
| builder.copy( |
| &builder.musl_root(target).unwrap().join("lib").join(obj), |
| &libdir.join(obj), |
| ); |
| } |
| } else if target.ends_with("-wasi") { |
| for &obj in &["crt1.o"] { |
| builder.copy( |
| &builder.wasi_root(target).unwrap().join("lib/wasm32-wasi").join(obj), |
| &libdir.join(obj), |
| ); |
| } |
| } |
| |
| // Copies libunwind.a compiled to be linked wit x86_64-fortanix-unknown-sgx. |
| // |
| // This target needs to be linked to Fortanix's port of llvm's libunwind. |
| // libunwind requires support for rwlock and printing to stderr, |
| // which is provided by std for this target. |
| if target == "x86_64-fortanix-unknown-sgx" { |
| let src_path_env = "X86_FORTANIX_SGX_LIBS"; |
| let obj = "libunwind.a"; |
| let src = env::var(src_path_env).expect(&format!("{} not found in env", src_path_env)); |
| let src = Path::new(&src).join(obj); |
| builder.copy(&src, &libdir.join(obj)); |
| } |
| } |
| |
| /// Configure cargo to compile the standard library, adding appropriate env vars |
| /// and such. |
| pub fn std_cargo(builder: &Builder<'_>, |
| compiler: &Compiler, |
| target: Interned<String>, |
| cargo: &mut Command) { |
| if let Some(target) = env::var_os("MACOSX_STD_DEPLOYMENT_TARGET") { |
| cargo.env("MACOSX_DEPLOYMENT_TARGET", target); |
| } |
| |
| // Determine if we're going to compile in optimized C intrinsics to |
| // the `compiler-builtins` crate. These intrinsics live in LLVM's |
| // `compiler-rt` repository, but our `src/llvm-project` submodule isn't |
| // always checked out, so we need to conditionally look for this. (e.g. if |
| // an external LLVM is used we skip the LLVM submodule checkout). |
| // |
| // Note that this shouldn't affect the correctness of `compiler-builtins`, |
| // but only its speed. Some intrinsics in C haven't been translated to Rust |
| // yet but that's pretty rare. Other intrinsics have optimized |
| // implementations in C which have only had slower versions ported to Rust, |
| // so we favor the C version where we can, but it's not critical. |
| // |
| // If `compiler-rt` is available ensure that the `c` feature of the |
| // `compiler-builtins` crate is enabled and it's configured to learn where |
| // `compiler-rt` is located. |
| let compiler_builtins_root = builder.src.join("src/llvm-project/compiler-rt"); |
| let compiler_builtins_c_feature = if compiler_builtins_root.exists() { |
| cargo.env("RUST_COMPILER_RT_ROOT", &compiler_builtins_root); |
| " compiler-builtins-c".to_string() |
| } else { |
| String::new() |
| }; |
| |
| if builder.no_std(target) == Some(true) { |
| let mut features = "compiler-builtins-mem".to_string(); |
| features.push_str(&compiler_builtins_c_feature); |
| |
| // for no-std targets we only compile a few no_std crates |
| cargo |
| .args(&["-p", "alloc"]) |
| .arg("--manifest-path") |
| .arg(builder.src.join("src/liballoc/Cargo.toml")) |
| .arg("--features") |
| .arg("compiler-builtins-mem compiler-builtins-c"); |
| } else { |
| let mut features = builder.std_features(); |
| features.push_str(&compiler_builtins_c_feature); |
| |
| if compiler.stage != 0 && builder.config.sanitizers { |
| // This variable is used by the sanitizer runtime crates, e.g. |
| // rustc_lsan, to build the sanitizer runtime from C code |
| // When this variable is missing, those crates won't compile the C code, |
| // so we don't set this variable during stage0 where llvm-config is |
| // missing |
| // We also only build the runtimes when --enable-sanitizers (or its |
| // config.toml equivalent) is used |
| let llvm_config = builder.ensure(native::Llvm { |
| target: builder.config.build, |
| emscripten: false, |
| }); |
| cargo.env("LLVM_CONFIG", llvm_config); |
| } |
| |
| cargo.arg("--features").arg(features) |
| .arg("--manifest-path") |
| .arg(builder.src.join("src/libstd/Cargo.toml")); |
| |
| if target.contains("musl") { |
| if let Some(p) = builder.musl_root(target) { |
| cargo.env("MUSL_ROOT", p); |
| } |
| } |
| |
| if target.ends_with("-wasi") { |
| if let Some(p) = builder.wasi_root(target) { |
| cargo.env("WASI_ROOT", p); |
| } |
| } |
| } |
| } |
| |
| #[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)] |
| struct StdLink { |
| pub compiler: Compiler, |
| pub target_compiler: Compiler, |
| pub target: Interned<String>, |
| } |
| |
| impl Step for StdLink { |
| type Output = (); |
| |
| fn should_run(run: ShouldRun<'_>) -> ShouldRun<'_> { |
| run.never() |
| } |
| |
| /// Link all libstd rlibs/dylibs into the sysroot location. |
| /// |
| /// Links those artifacts generated by `compiler` to the `stage` compiler's |
| /// sysroot for the specified `host` and `target`. |
| /// |
| /// Note that this assumes that `compiler` has already generated the libstd |
| /// libraries for `target`, and this method will find them in the relevant |
| /// output directory. |
| fn run(self, builder: &Builder<'_>) { |
| let compiler = self.compiler; |
| let target_compiler = self.target_compiler; |
| let target = self.target; |
| builder.info(&format!("Copying stage{} std from stage{} ({} -> {} / {})", |
| target_compiler.stage, |
| compiler.stage, |
| &compiler.host, |
| target_compiler.host, |
| target)); |
| let libdir = builder.sysroot_libdir(target_compiler, target); |
| let hostdir = builder.sysroot_libdir(target_compiler, compiler.host); |
| add_to_sysroot(builder, &libdir, &hostdir, &libstd_stamp(builder, compiler, target)); |
| |
| if builder.config.sanitizers && compiler.stage != 0 && target == "x86_64-apple-darwin" { |
| // The sanitizers are only built in stage1 or above, so the dylibs will |
| // be missing in stage0 and causes panic. See the `std()` function above |
| // for reason why the sanitizers are not built in stage0. |
| copy_apple_sanitizer_dylibs(builder, &builder.native_dir(target), "osx", &libdir); |
| } |
| } |
| } |
| |
| fn copy_apple_sanitizer_dylibs( |
| builder: &Builder<'_>, |
| native_dir: &Path, |
| platform: &str, |
| into: &Path, |
| ) { |
| for &sanitizer in &["asan", "tsan"] { |
| let filename = format!("lib__rustc__clang_rt.{}_{}_dynamic.dylib", sanitizer, platform); |
| let mut src_path = native_dir.join(sanitizer); |
| src_path.push("build"); |
| src_path.push("lib"); |
| src_path.push("darwin"); |
| src_path.push(&filename); |
| builder.copy(&src_path, &into.join(filename)); |
| } |
| } |
| |
| #[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)] |
| pub struct StartupObjects { |
| pub compiler: Compiler, |
| pub target: Interned<String>, |
| } |
| |
| impl Step for StartupObjects { |
| type Output = (); |
| |
| fn should_run(run: ShouldRun<'_>) -> ShouldRun<'_> { |
| run.path("src/rtstartup") |
| } |
| |
| fn make_run(run: RunConfig<'_>) { |
| run.builder.ensure(StartupObjects { |
| compiler: run.builder.compiler(run.builder.top_stage, run.host), |
| target: run.target, |
| }); |
| } |
| |
| /// Builds 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 run(self, builder: &Builder<'_>) { |
| let for_compiler = self.compiler; |
| let target = self.target; |
| if !target.contains("windows-gnu") { |
| return |
| } |
| |
| let src_dir = &builder.src.join("src/rtstartup"); |
| let dst_dir = &builder.native_dir(target).join("rtstartup"); |
| let sysroot_dir = &builder.sysroot_libdir(for_compiler, target); |
| t!(fs::create_dir_all(dst_dir)); |
| |
| for file in &["rsbegin", "rsend"] { |
| let src_file = &src_dir.join(file.to_string() + ".rs"); |
| let dst_file = &dst_dir.join(file.to_string() + ".o"); |
| if !up_to_date(src_file, dst_file) { |
| let mut cmd = Command::new(&builder.initial_rustc); |
| builder.run(cmd.env("RUSTC_BOOTSTRAP", "1") |
| .arg("--cfg").arg("bootstrap") |
| .arg("--target").arg(target) |
| .arg("--emit=obj") |
| .arg("-o").arg(dst_file) |
| .arg(src_file)); |
| } |
| |
| builder.copy(dst_file, &sysroot_dir.join(file.to_string() + ".o")); |
| } |
| |
| for obj in ["crt2.o", "dllcrt2.o"].iter() { |
| let src = compiler_file(builder, |
| builder.cc(target), |
| target, |
| obj); |
| builder.copy(&src, &sysroot_dir.join(obj)); |
| } |
| } |
| } |
| |
| #[derive(Debug, PartialOrd, Ord, Copy, Clone, PartialEq, Eq, Hash)] |
| pub struct Test { |
| pub target: Interned<String>, |
| pub compiler: Compiler, |
| } |
| |
| impl Step for Test { |
| type Output = (); |
| const DEFAULT: bool = true; |
| |
| fn should_run(run: ShouldRun<'_>) -> ShouldRun<'_> { |
| run.all_krates("test") |
| } |
| |
| fn make_run(run: RunConfig<'_>) { |
| run.builder.ensure(Test { |
| compiler: run.builder.compiler(run.builder.top_stage, run.host), |
| target: run.target, |
| }); |
| } |
| |
| /// Builds libtest. |
| /// |
| /// This will build libtest and supporting libraries 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. |
| fn run(self, builder: &Builder<'_>) { |
| let target = self.target; |
| let compiler = self.compiler; |
| |
| builder.ensure(Std { compiler, target }); |
| |
| if builder.config.keep_stage.contains(&compiler.stage) { |
| builder.info("Warning: Using a potentially old libtest. This may not behave well."); |
| builder.ensure(TestLink { |
| compiler, |
| target_compiler: compiler, |
| target, |
| }); |
| return; |
| } |
| |
| let compiler_to_use = builder.compiler_for(compiler.stage, compiler.host, target); |
| if compiler_to_use != compiler { |
| builder.ensure(Test { |
| compiler: compiler_to_use, |
| target, |
| }); |
| builder.info( |
| &format!("Uplifting stage1 test ({} -> {})", builder.config.build, target)); |
| builder.ensure(TestLink { |
| compiler: compiler_to_use, |
| target_compiler: compiler, |
| target, |
| }); |
| return; |
| } |
| |
| let mut cargo = builder.cargo(compiler, Mode::Test, target, "build"); |
| test_cargo(builder, &compiler, target, &mut cargo); |
| |
| builder.info(&format!("Building stage{} test artifacts ({} -> {})", compiler.stage, |
| &compiler.host, target)); |
| run_cargo(builder, |
| &mut cargo, |
| vec![], |
| &libtest_stamp(builder, compiler, target), |
| false); |
| |
| builder.ensure(TestLink { |
| compiler: builder.compiler(compiler.stage, builder.config.build), |
| target_compiler: compiler, |
| target, |
| }); |
| } |
| } |
| |
| /// Same as `std_cargo`, but for libtest |
| pub fn test_cargo(builder: &Builder<'_>, |
| _compiler: &Compiler, |
| _target: Interned<String>, |
| cargo: &mut Command) { |
| if let Some(target) = env::var_os("MACOSX_STD_DEPLOYMENT_TARGET") { |
| cargo.env("MACOSX_DEPLOYMENT_TARGET", target); |
| } |
| cargo.arg("--manifest-path") |
| .arg(builder.src.join("src/libtest/Cargo.toml")); |
| } |
| |
| #[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)] |
| pub struct TestLink { |
| pub compiler: Compiler, |
| pub target_compiler: Compiler, |
| pub target: Interned<String>, |
| } |
| |
| impl Step for TestLink { |
| type Output = (); |
| |
| fn should_run(run: ShouldRun<'_>) -> ShouldRun<'_> { |
| run.never() |
| } |
| |
| /// Same as `std_link`, only for libtest |
| fn run(self, builder: &Builder<'_>) { |
| let compiler = self.compiler; |
| let target_compiler = self.target_compiler; |
| let target = self.target; |
| builder.info(&format!("Copying stage{} test from stage{} ({} -> {} / {})", |
| target_compiler.stage, |
| compiler.stage, |
| &compiler.host, |
| target_compiler.host, |
| target)); |
| add_to_sysroot( |
| builder, |
| &builder.sysroot_libdir(target_compiler, target), |
| &builder.sysroot_libdir(target_compiler, compiler.host), |
| &libtest_stamp(builder, compiler, target) |
| ); |
| } |
| } |
| |
| #[derive(Debug, PartialOrd, Ord, Copy, Clone, PartialEq, Eq, Hash)] |
| pub struct Rustc { |
| pub target: Interned<String>, |
| pub compiler: Compiler, |
| } |
| |
| impl Step for Rustc { |
| type Output = (); |
| const ONLY_HOSTS: bool = true; |
| const DEFAULT: bool = true; |
| |
| fn should_run(run: ShouldRun<'_>) -> ShouldRun<'_> { |
| run.all_krates("rustc-main") |
| } |
| |
| fn make_run(run: RunConfig<'_>) { |
| run.builder.ensure(Rustc { |
| compiler: run.builder.compiler(run.builder.top_stage, run.host), |
| target: run.target, |
| }); |
| } |
| |
| /// Builds 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. |
| fn run(self, builder: &Builder<'_>) { |
| let compiler = self.compiler; |
| let target = self.target; |
| |
| builder.ensure(Test { compiler, target }); |
| |
| if builder.config.keep_stage.contains(&compiler.stage) { |
| builder.info("Warning: Using a potentially old librustc. This may not behave well."); |
| builder.ensure(RustcLink { |
| compiler, |
| target_compiler: compiler, |
| target, |
| }); |
| return; |
| } |
| |
| let compiler_to_use = builder.compiler_for(compiler.stage, compiler.host, target); |
| if compiler_to_use != compiler { |
| builder.ensure(Rustc { |
| compiler: compiler_to_use, |
| target, |
| }); |
| builder.info(&format!("Uplifting stage1 rustc ({} -> {})", |
| builder.config.build, target)); |
| builder.ensure(RustcLink { |
| compiler: compiler_to_use, |
| target_compiler: compiler, |
| target, |
| }); |
| return; |
| } |
| |
| // Ensure that build scripts and proc macros have a std / libproc_macro to link against. |
| builder.ensure(Test { |
| compiler: builder.compiler(self.compiler.stage, builder.config.build), |
| target: builder.config.build, |
| }); |
| |
| let mut cargo = builder.cargo(compiler, Mode::Rustc, target, "build"); |
| rustc_cargo(builder, &mut cargo); |
| |
| builder.info(&format!("Building stage{} compiler artifacts ({} -> {})", |
| compiler.stage, &compiler.host, target)); |
| run_cargo(builder, |
| &mut cargo, |
| vec![], |
| &librustc_stamp(builder, compiler, target), |
| false); |
| |
| builder.ensure(RustcLink { |
| compiler: builder.compiler(compiler.stage, builder.config.build), |
| target_compiler: compiler, |
| target, |
| }); |
| } |
| } |
| |
| pub fn rustc_cargo(builder: &Builder<'_>, cargo: &mut Command) { |
| cargo.arg("--features").arg(builder.rustc_features()) |
| .arg("--manifest-path") |
| .arg(builder.src.join("src/rustc/Cargo.toml")); |
| rustc_cargo_env(builder, cargo); |
| } |
| |
| pub fn rustc_cargo_env(builder: &Builder<'_>, cargo: &mut Command) { |
| // Set some configuration variables picked up by build scripts and |
| // the compiler alike |
| cargo.env("CFG_RELEASE", builder.rust_release()) |
| .env("CFG_RELEASE_CHANNEL", &builder.config.channel) |
| .env("CFG_VERSION", builder.rust_version()) |
| .env("CFG_PREFIX", builder.config.prefix.clone().unwrap_or_default()) |
| .env("CFG_CODEGEN_BACKENDS_DIR", &builder.config.rust_codegen_backends_dir); |
| |
| let libdir_relative = builder.config.libdir_relative().unwrap_or(Path::new("lib")); |
| cargo.env("CFG_LIBDIR_RELATIVE", libdir_relative); |
| |
| if let Some(ref ver_date) = builder.rust_info.commit_date() { |
| cargo.env("CFG_VER_DATE", ver_date); |
| } |
| if let Some(ref ver_hash) = builder.rust_info.sha() { |
| cargo.env("CFG_VER_HASH", ver_hash); |
| } |
| if !builder.unstable_features() { |
| cargo.env("CFG_DISABLE_UNSTABLE_FEATURES", "1"); |
| } |
| if let Some(ref s) = builder.config.rustc_default_linker { |
| cargo.env("CFG_DEFAULT_LINKER", s); |
| } |
| if builder.config.rustc_parallel { |
| cargo.env("RUSTC_PARALLEL_COMPILER", "1"); |
| } |
| if builder.config.rust_verify_llvm_ir { |
| cargo.env("RUSTC_VERIFY_LLVM_IR", "1"); |
| } |
| } |
| |
| #[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)] |
| struct RustcLink { |
| pub compiler: Compiler, |
| pub target_compiler: Compiler, |
| pub target: Interned<String>, |
| } |
| |
| impl Step for RustcLink { |
| type Output = (); |
| |
| fn should_run(run: ShouldRun<'_>) -> ShouldRun<'_> { |
| run.never() |
| } |
| |
| /// Same as `std_link`, only for librustc |
| fn run(self, builder: &Builder<'_>) { |
| let compiler = self.compiler; |
| let target_compiler = self.target_compiler; |
| let target = self.target; |
| builder.info(&format!("Copying stage{} rustc from stage{} ({} -> {} / {})", |
| target_compiler.stage, |
| compiler.stage, |
| &compiler.host, |
| target_compiler.host, |
| target)); |
| add_to_sysroot( |
| builder, |
| &builder.sysroot_libdir(target_compiler, target), |
| &builder.sysroot_libdir(target_compiler, compiler.host), |
| &librustc_stamp(builder, compiler, target) |
| ); |
| } |
| } |
| |
| #[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)] |
| pub struct CodegenBackend { |
| pub compiler: Compiler, |
| pub target: Interned<String>, |
| pub backend: Interned<String>, |
| } |
| |
| impl Step for CodegenBackend { |
| type Output = (); |
| const ONLY_HOSTS: bool = true; |
| const DEFAULT: bool = true; |
| |
| fn should_run(run: ShouldRun<'_>) -> ShouldRun<'_> { |
| run.all_krates("rustc_codegen_llvm") |
| } |
| |
| fn make_run(run: RunConfig<'_>) { |
| let backend = run.builder.config.rust_codegen_backends.get(0); |
| let backend = backend.cloned().unwrap_or_else(|| { |
| INTERNER.intern_str("llvm") |
| }); |
| run.builder.ensure(CodegenBackend { |
| compiler: run.builder.compiler(run.builder.top_stage, run.host), |
| target: run.target, |
| backend, |
| }); |
| } |
| |
| fn run(self, builder: &Builder<'_>) { |
| let compiler = self.compiler; |
| let target = self.target; |
| let backend = self.backend; |
| |
| builder.ensure(Rustc { compiler, target }); |
| |
| if builder.config.keep_stage.contains(&compiler.stage) { |
| builder.info("Warning: Using a potentially old codegen backend. \ |
| This may not behave well."); |
| // Codegen backends are linked separately from this step today, so we don't do |
| // anything here. |
| return; |
| } |
| |
| let compiler_to_use = builder.compiler_for(compiler.stage, compiler.host, target); |
| if compiler_to_use != compiler { |
| builder.ensure(CodegenBackend { |
| compiler: compiler_to_use, |
| target, |
| backend, |
| }); |
| return; |
| } |
| |
| let out_dir = builder.cargo_out(compiler, Mode::Codegen, target); |
| |
| let mut cargo = builder.cargo(compiler, Mode::Codegen, target, "build"); |
| cargo.arg("--manifest-path") |
| .arg(builder.src.join("src/librustc_codegen_llvm/Cargo.toml")); |
| rustc_cargo_env(builder, &mut cargo); |
| |
| let features = build_codegen_backend(&builder, &mut cargo, &compiler, target, backend); |
| |
| let tmp_stamp = out_dir.join(".tmp.stamp"); |
| |
| let files = run_cargo(builder, |
| cargo.arg("--features").arg(features), |
| vec![], |
| &tmp_stamp, |
| false); |
| if builder.config.dry_run { |
| return; |
| } |
| let mut files = files.into_iter() |
| .filter(|f| { |
| let filename = f.file_name().unwrap().to_str().unwrap(); |
| is_dylib(filename) && filename.contains("rustc_codegen_llvm-") |
| }); |
| let codegen_backend = match files.next() { |
| Some(f) => f, |
| None => panic!("no dylibs built for codegen backend?"), |
| }; |
| if let Some(f) = files.next() { |
| panic!("codegen backend built two dylibs:\n{}\n{}", |
| codegen_backend.display(), |
| f.display()); |
| } |
| let stamp = codegen_backend_stamp(builder, compiler, target, backend); |
| let codegen_backend = codegen_backend.to_str().unwrap(); |
| t!(fs::write(&stamp, &codegen_backend)); |
| } |
| } |
| |
| pub fn build_codegen_backend(builder: &Builder<'_>, |
| cargo: &mut Command, |
| compiler: &Compiler, |
| target: Interned<String>, |
| backend: Interned<String>) -> String { |
| let mut features = String::new(); |
| |
| match &*backend { |
| "llvm" | "emscripten" => { |
| // Build LLVM for our target. This will implicitly build the |
| // host LLVM if necessary. |
| let llvm_config = builder.ensure(native::Llvm { |
| target, |
| emscripten: backend == "emscripten", |
| }); |
| |
| if backend == "emscripten" { |
| features.push_str(" emscripten"); |
| } |
| |
| builder.info(&format!("Building stage{} codegen artifacts ({} -> {}, {})", |
| compiler.stage, &compiler.host, target, backend)); |
| |
| // Pass down configuration from the LLVM build into the build of |
| // librustc_llvm and librustc_codegen_llvm. |
| if builder.is_rust_llvm(target) && backend != "emscripten" { |
| cargo.env("LLVM_RUSTLLVM", "1"); |
| } |
| |
| cargo.env("LLVM_CONFIG", &llvm_config); |
| if backend != "emscripten" { |
| let target_config = builder.config.target_config.get(&target); |
| if let Some(s) = target_config.and_then(|c| c.llvm_config.as_ref()) { |
| cargo.env("CFG_LLVM_ROOT", s); |
| } |
| } |
| // Some LLVM linker flags (-L and -l) may be needed to link librustc_llvm. |
| if let Some(ref s) = builder.config.llvm_ldflags { |
| cargo.env("LLVM_LINKER_FLAGS", s); |
| } |
| // Building with a static libstdc++ is only supported on linux right now, |
| // not for MSVC or macOS |
| if builder.config.llvm_static_stdcpp && |
| !target.contains("freebsd") && |
| !target.contains("windows") && |
| !target.contains("apple") { |
| let file = compiler_file(builder, |
| builder.cxx(target).unwrap(), |
| target, |
| "libstdc++.a"); |
| cargo.env("LLVM_STATIC_STDCPP", file); |
| } |
| if builder.config.llvm_link_shared || |
| (builder.config.llvm_thin_lto && backend != "emscripten") |
| { |
| cargo.env("LLVM_LINK_SHARED", "1"); |
| } |
| if builder.config.llvm_use_libcxx { |
| cargo.env("LLVM_USE_LIBCXX", "1"); |
| } |
| } |
| _ => panic!("unknown backend: {}", backend), |
| } |
| |
| features |
| } |
| |
| /// Creates the `codegen-backends` folder for a compiler that's about to be |
| /// assembled as a complete compiler. |
| /// |
| /// This will take the codegen artifacts produced by `compiler` and link them |
| /// into an appropriate location for `target_compiler` to be a functional |
| /// compiler. |
| fn copy_codegen_backends_to_sysroot(builder: &Builder<'_>, |
| compiler: Compiler, |
| target_compiler: Compiler) { |
| let target = target_compiler.host; |
| |
| // Note that this step is different than all the other `*Link` steps in |
| // that it's not assembling a bunch of libraries but rather is primarily |
| // moving the codegen backend into place. The codegen backend of rustc is |
| // not linked into the main compiler by default but is rather dynamically |
| // selected at runtime for inclusion. |
| // |
| // Here we're looking for the output dylib of the `CodegenBackend` step and |
| // we're copying that into the `codegen-backends` folder. |
| let dst = builder.sysroot_codegen_backends(target_compiler); |
| t!(fs::create_dir_all(&dst)); |
| |
| if builder.config.dry_run { |
| return; |
| } |
| |
| for backend in builder.config.rust_codegen_backends.iter() { |
| let stamp = codegen_backend_stamp(builder, compiler, target, *backend); |
| let dylib = t!(fs::read_to_string(&stamp)); |
| let file = Path::new(&dylib); |
| let filename = file.file_name().unwrap().to_str().unwrap(); |
| // change `librustc_codegen_llvm-xxxxxx.so` to `librustc_codegen_llvm-llvm.so` |
| let target_filename = { |
| let dash = filename.find('-').unwrap(); |
| let dot = filename.find('.').unwrap(); |
| format!("{}-{}{}", |
| &filename[..dash], |
| backend, |
| &filename[dot..]) |
| }; |
| builder.copy(&file, &dst.join(target_filename)); |
| } |
| } |
| |
| fn copy_lld_to_sysroot(builder: &Builder<'_>, |
| target_compiler: Compiler, |
| lld_install_root: &Path) { |
| let target = target_compiler.host; |
| |
| let dst = builder.sysroot_libdir(target_compiler, target) |
| .parent() |
| .unwrap() |
| .join("bin"); |
| t!(fs::create_dir_all(&dst)); |
| |
| let src_exe = exe("lld", &target); |
| let dst_exe = exe("rust-lld", &target); |
| // we prepend this bin directory to the user PATH when linking Rust binaries. To |
| // avoid shadowing the system LLD we rename the LLD we provide to `rust-lld`. |
| builder.copy(&lld_install_root.join("bin").join(&src_exe), &dst.join(&dst_exe)); |
| } |
| |
| /// Cargo's output path for the standard library in a given stage, compiled |
| /// by a particular compiler for the specified target. |
| pub fn libstd_stamp( |
| builder: &Builder<'_>, |
| compiler: Compiler, |
| target: Interned<String>, |
| ) -> PathBuf { |
| builder.cargo_out(compiler, Mode::Std, target).join(".libstd.stamp") |
| } |
| |
| /// Cargo's output path for libtest in a given stage, compiled by a particular |
| /// compiler for the specified target. |
| pub fn libtest_stamp( |
| builder: &Builder<'_>, |
| compiler: Compiler, |
| target: Interned<String>, |
| ) -> PathBuf { |
| builder.cargo_out(compiler, Mode::Test, target).join(".libtest.stamp") |
| } |
| |
| /// Cargo's output path for librustc in a given stage, compiled by a particular |
| /// compiler for the specified target. |
| pub fn librustc_stamp( |
| builder: &Builder<'_>, |
| compiler: Compiler, |
| target: Interned<String>, |
| ) -> PathBuf { |
| builder.cargo_out(compiler, Mode::Rustc, target).join(".librustc.stamp") |
| } |
| |
| /// Cargo's output path for librustc_codegen_llvm in a given stage, compiled by a particular |
| /// compiler for the specified target and backend. |
| fn codegen_backend_stamp(builder: &Builder<'_>, |
| compiler: Compiler, |
| target: Interned<String>, |
| backend: Interned<String>) -> PathBuf { |
| builder.cargo_out(compiler, Mode::Codegen, target) |
| .join(format!(".librustc_codegen_llvm-{}.stamp", backend)) |
| } |
| |
| pub fn compiler_file( |
| builder: &Builder<'_>, |
| compiler: &Path, |
| target: Interned<String>, |
| file: &str, |
| ) -> PathBuf { |
| let mut cmd = Command::new(compiler); |
| cmd.args(builder.cflags(target, GitRepo::Rustc)); |
| cmd.arg(format!("-print-file-name={}", file)); |
| let out = output(&mut cmd); |
| PathBuf::from(out.trim()) |
| } |
| |
| #[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)] |
| pub struct Sysroot { |
| pub compiler: Compiler, |
| } |
| |
| impl Step for Sysroot { |
| type Output = Interned<PathBuf>; |
| |
| fn should_run(run: ShouldRun<'_>) -> ShouldRun<'_> { |
| run.never() |
| } |
| |
| /// Returns the sysroot for the `compiler` specified that *this build system |
| /// generates*. |
| /// |
| /// That is, the sysroot for the stage0 compiler is not what the compiler |
| /// thinks it is by default, but it's the same as the default for stages |
| /// 1-3. |
| fn run(self, builder: &Builder<'_>) -> Interned<PathBuf> { |
| let compiler = self.compiler; |
| let sysroot = if compiler.stage == 0 { |
| builder.out.join(&compiler.host).join("stage0-sysroot") |
| } else { |
| builder.out.join(&compiler.host).join(format!("stage{}", compiler.stage)) |
| }; |
| let _ = fs::remove_dir_all(&sysroot); |
| t!(fs::create_dir_all(&sysroot)); |
| INTERNER.intern_path(sysroot) |
| } |
| } |
| |
| #[derive(Debug, Copy, PartialOrd, Ord, Clone, PartialEq, Eq, Hash)] |
| pub struct Assemble { |
| /// The compiler which we will produce in this step. Assemble itself will |
| /// take care of ensuring that the necessary prerequisites to do so exist, |
| /// that is, this target can be a stage2 compiler and Assemble will build |
| /// previous stages for you. |
| pub target_compiler: Compiler, |
| } |
| |
| impl Step for Assemble { |
| type Output = Compiler; |
| |
| fn should_run(run: ShouldRun<'_>) -> ShouldRun<'_> { |
| run.never() |
| } |
| |
| /// Prepare a new compiler from the artifacts in `stage` |
| /// |
| /// This will assemble a compiler in `build/$host/stage$stage`. The compiler |
| /// must have been previously produced by the `stage - 1` builder.build |
| /// compiler. |
| fn run(self, builder: &Builder<'_>) -> Compiler { |
| let target_compiler = self.target_compiler; |
| |
| if target_compiler.stage == 0 { |
| assert_eq!(builder.config.build, target_compiler.host, |
| "Cannot obtain compiler for non-native build triple at stage 0"); |
| // The stage 0 compiler for the build triple is always pre-built. |
| return target_compiler; |
| } |
| |
| // Get the compiler that we'll use to bootstrap ourselves. |
| // |
| // Note that this is where the recursive nature of the bootstrap |
| // happens, as this will request the previous stage's compiler on |
| // downwards to stage 0. |
| // |
| // Also note that we're building a compiler for the host platform. We |
| // only assume that we can run `build` artifacts, which means that to |
| // produce some other architecture compiler we need to start from |
| // `build` to get there. |
| // |
| // FIXME: Perhaps we should download those libraries? |
| // It would make builds faster... |
| // |
| // FIXME: It may be faster if we build just a stage 1 compiler and then |
| // use that to bootstrap this compiler forward. |
| let build_compiler = |
| builder.compiler(target_compiler.stage - 1, builder.config.build); |
| |
| // Build the libraries for this compiler to link to (i.e., the libraries |
| // it uses at runtime). NOTE: Crates the target compiler compiles don't |
| // link to these. (FIXME: Is that correct? It seems to be correct most |
| // of the time but I think we do link to these for stage2/bin compilers |
| // when not performing a full bootstrap). |
| builder.ensure(Rustc { |
| compiler: build_compiler, |
| target: target_compiler.host, |
| }); |
| for &backend in builder.config.rust_codegen_backends.iter() { |
| builder.ensure(CodegenBackend { |
| compiler: build_compiler, |
| target: target_compiler.host, |
| backend, |
| }); |
| } |
| |
| let lld_install = if builder.config.lld_enabled { |
| Some(builder.ensure(native::Lld { |
| target: target_compiler.host, |
| })) |
| } else { |
| None |
| }; |
| |
| let stage = target_compiler.stage; |
| let host = target_compiler.host; |
| builder.info(&format!("Assembling stage{} compiler ({})", stage, host)); |
| |
| // Link in all dylibs to the libdir |
| let sysroot = builder.sysroot(target_compiler); |
| let rustc_libdir = builder.rustc_libdir(target_compiler); |
| t!(fs::create_dir_all(&rustc_libdir)); |
| let src_libdir = builder.sysroot_libdir(build_compiler, host); |
| for f in builder.read_dir(&src_libdir) { |
| let filename = f.file_name().into_string().unwrap(); |
| if is_dylib(&filename) { |
| builder.copy(&f.path(), &rustc_libdir.join(&filename)); |
| } |
| } |
| |
| copy_codegen_backends_to_sysroot(builder, |
| build_compiler, |
| target_compiler); |
| if let Some(lld_install) = lld_install { |
| copy_lld_to_sysroot(builder, target_compiler, &lld_install); |
| } |
| |
| dist::maybe_install_llvm_dylib(builder, target_compiler.host, &sysroot); |
| |
| // Link the compiler binary itself into place |
| let out_dir = builder.cargo_out(build_compiler, Mode::Rustc, host); |
| let rustc = out_dir.join(exe("rustc_binary", &*host)); |
| let bindir = sysroot.join("bin"); |
| t!(fs::create_dir_all(&bindir)); |
| let compiler = builder.rustc(target_compiler); |
| let _ = fs::remove_file(&compiler); |
| builder.copy(&rustc, &compiler); |
| |
| target_compiler |
| } |
| } |
| |
| /// Link some files into a rustc sysroot. |
| /// |
| /// For a particular stage this will link the file listed in `stamp` into the |
| /// `sysroot_dst` provided. |
| pub fn add_to_sysroot( |
| builder: &Builder<'_>, |
| sysroot_dst: &Path, |
| sysroot_host_dst: &Path, |
| stamp: &Path |
| ) { |
| t!(fs::create_dir_all(&sysroot_dst)); |
| t!(fs::create_dir_all(&sysroot_host_dst)); |
| for (path, host) in builder.read_stamp_file(stamp) { |
| if host { |
| builder.copy(&path, &sysroot_host_dst.join(path.file_name().unwrap())); |
| } else { |
| builder.copy(&path, &sysroot_dst.join(path.file_name().unwrap())); |
| } |
| } |
| } |
| |
| pub fn run_cargo(builder: &Builder<'_>, |
| cargo: &mut Command, |
| tail_args: Vec<String>, |
| stamp: &Path, |
| is_check: bool) |
| -> Vec<PathBuf> |
| { |
| if builder.config.dry_run { |
| return Vec::new(); |
| } |
| |
| // `target_root_dir` looks like $dir/$target/release |
| let target_root_dir = stamp.parent().unwrap(); |
| // `target_deps_dir` looks like $dir/$target/release/deps |
| let target_deps_dir = target_root_dir.join("deps"); |
| // `host_root_dir` looks like $dir/release |
| let host_root_dir = target_root_dir.parent().unwrap() // chop off `release` |
| .parent().unwrap() // chop off `$target` |
| .join(target_root_dir.file_name().unwrap()); |
| |
| // Spawn Cargo slurping up its JSON output. We'll start building up the |
| // `deps` array of all files it generated along with a `toplevel` array of |
| // files we need to probe for later. |
| let mut deps = Vec::new(); |
| let mut toplevel = Vec::new(); |
| let ok = stream_cargo(builder, cargo, tail_args, &mut |msg| { |
| let (filenames, crate_types) = match msg { |
| CargoMessage::CompilerArtifact { |
| filenames, |
| target: CargoTarget { |
| crate_types, |
| }, |
| .. |
| } => (filenames, crate_types), |
| _ => return, |
| }; |
| for filename in filenames { |
| // Skip files like executables |
| if !filename.ends_with(".rlib") && |
| !filename.ends_with(".lib") && |
| !filename.ends_with(".a") && |
| !is_dylib(&filename) && |
| !(is_check && filename.ends_with(".rmeta")) { |
| continue; |
| } |
| |
| let filename = Path::new(&*filename); |
| |
| // If this was an output file in the "host dir" we don't actually |
| // worry about it, it's not relevant for us |
| if filename.starts_with(&host_root_dir) { |
| // Unless it's a proc macro used in the compiler |
| if crate_types.iter().any(|t| t == "proc-macro") { |
| deps.push((filename.to_path_buf(), true)); |
| } |
| continue; |
| } |
| |
| // If this was output in the `deps` dir then this is a precise file |
| // name (hash included) so we start tracking it. |
| if filename.starts_with(&target_deps_dir) { |
| deps.push((filename.to_path_buf(), false)); |
| continue; |
| } |
| |
| // Otherwise this was a "top level artifact" which right now doesn't |
| // have a hash in the name, but there's a version of this file in |
| // the `deps` folder which *does* have a hash in the name. That's |
| // the one we'll want to we'll probe for it later. |
| // |
| // We do not use `Path::file_stem` or `Path::extension` here, |
| // because some generated files may have multiple extensions e.g. |
| // `std-<hash>.dll.lib` on Windows. The aforementioned methods only |
| // split the file name by the last extension (`.lib`) while we need |
| // to split by all extensions (`.dll.lib`). |
| let expected_len = t!(filename.metadata()).len(); |
| let filename = filename.file_name().unwrap().to_str().unwrap(); |
| let mut parts = filename.splitn(2, '.'); |
| let file_stem = parts.next().unwrap().to_owned(); |
| let extension = parts.next().unwrap().to_owned(); |
| |
| toplevel.push((file_stem, extension, expected_len)); |
| } |
| }); |
| |
| if !ok { |
| exit(1); |
| } |
| |
| // Ok now we need to actually find all the files listed in `toplevel`. We've |
| // got a list of prefix/extensions and we basically just need to find the |
| // most recent file in the `deps` folder corresponding to each one. |
| let contents = t!(target_deps_dir.read_dir()) |
| .map(|e| t!(e)) |
| .map(|e| (e.path(), e.file_name().into_string().unwrap(), t!(e.metadata()))) |
| .collect::<Vec<_>>(); |
| for (prefix, extension, expected_len) in toplevel { |
| let candidates = contents.iter().filter(|&&(_, ref filename, ref meta)| { |
| filename.starts_with(&prefix[..]) && |
| filename[prefix.len()..].starts_with("-") && |
| filename.ends_with(&extension[..]) && |
| meta.len() == expected_len |
| }); |
| let max = candidates.max_by_key(|&&(_, _, ref metadata)| { |
| FileTime::from_last_modification_time(metadata) |
| }); |
| let path_to_add = match max { |
| Some(triple) => triple.0.to_str().unwrap(), |
| None => panic!("no output generated for {:?} {:?}", prefix, extension), |
| }; |
| if is_dylib(path_to_add) { |
| let candidate = format!("{}.lib", path_to_add); |
| let candidate = PathBuf::from(candidate); |
| if candidate.exists() { |
| deps.push((candidate, false)); |
| } |
| } |
| deps.push((path_to_add.into(), false)); |
| } |
| |
| deps.sort(); |
| let mut new_contents = Vec::new(); |
| for (dep, proc_macro) in deps.iter() { |
| new_contents.extend(if *proc_macro { b"h" } else { b"t" }); |
| new_contents.extend(dep.to_str().unwrap().as_bytes()); |
| new_contents.extend(b"\0"); |
| } |
| t!(fs::write(&stamp, &new_contents)); |
| deps.into_iter().map(|(d, _)| d).collect() |
| } |
| |
| pub fn stream_cargo( |
| builder: &Builder<'_>, |
| cargo: &mut Command, |
| tail_args: Vec<String>, |
| cb: &mut dyn FnMut(CargoMessage<'_>), |
| ) -> bool { |
| if builder.config.dry_run { |
| return true; |
| } |
| // Instruct Cargo to give us json messages on stdout, critically leaving |
| // stderr as piped so we can get those pretty colors. |
| let mut message_format = String::from("json-render-diagnostics"); |
| if let Some(s) = &builder.config.rustc_error_format { |
| message_format.push_str(",json-diagnostic-"); |
| message_format.push_str(s); |
| } |
| cargo.arg("--message-format").arg(message_format).stdout(Stdio::piped()); |
| |
| for arg in tail_args { |
| cargo.arg(arg); |
| } |
| |
| builder.verbose(&format!("running: {:?}", cargo)); |
| let mut child = match cargo.spawn() { |
| Ok(child) => child, |
| Err(e) => panic!("failed to execute command: {:?}\nerror: {}", cargo, e), |
| }; |
| |
| // Spawn Cargo slurping up its JSON output. We'll start building up the |
| // `deps` array of all files it generated along with a `toplevel` array of |
| // files we need to probe for later. |
| let stdout = BufReader::new(child.stdout.take().unwrap()); |
| for line in stdout.lines() { |
| let line = t!(line); |
| match serde_json::from_str::<CargoMessage<'_>>(&line) { |
| Ok(msg) => cb(msg), |
| // If this was informational, just print it out and continue |
| Err(_) => println!("{}", line) |
| } |
| } |
| |
| // Make sure Cargo actually succeeded after we read all of its stdout. |
| let status = t!(child.wait()); |
| if !status.success() { |
| eprintln!("command did not execute successfully: {:?}\n\ |
| expected success, got: {}", |
| cargo, |
| status); |
| } |
| status.success() |
| } |
| |
| #[derive(Deserialize)] |
| pub struct CargoTarget<'a> { |
| crate_types: Vec<Cow<'a, str>>, |
| } |
| |
| #[derive(Deserialize)] |
| #[serde(tag = "reason", rename_all = "kebab-case")] |
| pub enum CargoMessage<'a> { |
| CompilerArtifact { |
| package_id: Cow<'a, str>, |
| features: Vec<Cow<'a, str>>, |
| filenames: Vec<Cow<'a, str>>, |
| target: CargoTarget<'a>, |
| }, |
| BuildScriptExecuted { |
| package_id: Cow<'a, str>, |
| }, |
| } |
