789 lines
28 KiB
Rust
789 lines
28 KiB
Rust
// Copyright 2015 The Rust Project Developers. See the COPYRIGHT
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// file at the top-level directory of this distribution and at
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// http://rust-lang.org/COPYRIGHT.
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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//! Implementation of rustbuild, the Rust build system.
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//!
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//! This module, and its descendants, are the implementation of the Rust build
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//! system. Most of this build system is backed by Cargo but the outer layer
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//! here serves as the ability to orchestrate calling Cargo, sequencing Cargo
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//! builds, building artifacts like LLVM, etc.
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//!
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//! More documentation can be found in each respective module below.
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extern crate build_helper;
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extern crate cmake;
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extern crate filetime;
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extern crate gcc;
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extern crate getopts;
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extern crate md5;
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extern crate num_cpus;
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extern crate rustc_serialize;
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extern crate toml;
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use std::collections::HashMap;
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use std::env;
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use std::fs::{self, File};
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use std::path::{Component, PathBuf, Path};
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use std::process::Command;
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use build_helper::{run_silent, output};
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use util::{exe, mtime, libdir, add_lib_path};
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/// A helper macro to `unwrap` a result except also print out details like:
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///
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/// * The file/line of the panic
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/// * The expression that failed
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/// * The error itself
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///
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/// This is currently used judiciously throughout the build system rather than
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/// using a `Result` with `try!`, but this may change one day...
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macro_rules! t {
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($e:expr) => (match $e {
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Ok(e) => e,
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Err(e) => panic!("{} failed with {}", stringify!($e), e),
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})
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}
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mod cc;
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mod channel;
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mod check;
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mod clean;
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mod compile;
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mod metadata;
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mod config;
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mod dist;
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mod doc;
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mod flags;
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mod install;
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mod native;
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mod sanity;
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mod step;
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pub mod util;
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#[cfg(windows)]
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mod job;
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#[cfg(not(windows))]
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mod job {
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pub unsafe fn setup() {}
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}
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pub use config::Config;
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pub use flags::{Flags, Subcommand};
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/// A structure representing a Rust compiler.
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///
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/// Each compiler has a `stage` that it is associated with and a `host` that
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/// corresponds to the platform the compiler runs on. This structure is used as
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/// a parameter to many methods below.
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#[derive(Eq, PartialEq, Clone, Copy, Hash, Debug)]
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pub struct Compiler<'a> {
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stage: u32,
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host: &'a str,
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}
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/// Global configuration for the build system.
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///
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/// This structure transitively contains all configuration for the build system.
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/// All filesystem-encoded configuration is in `config`, all flags are in
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/// `flags`, and then parsed or probed information is listed in the keys below.
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///
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/// This structure is a parameter of almost all methods in the build system,
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/// although most functions are implemented as free functions rather than
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/// methods specifically on this structure itself (to make it easier to
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/// organize).
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pub struct Build {
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// User-specified configuration via config.toml
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config: Config,
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// User-specified configuration via CLI flags
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flags: Flags,
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// Derived properties from the above two configurations
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cargo: PathBuf,
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rustc: PathBuf,
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src: PathBuf,
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out: PathBuf,
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release: String,
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unstable_features: bool,
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ver_hash: Option<String>,
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short_ver_hash: Option<String>,
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ver_date: Option<String>,
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version: String,
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package_vers: String,
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local_rebuild: bool,
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bootstrap_key: String,
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bootstrap_key_stage0: String,
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// Probed tools at runtime
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gdb_version: Option<String>,
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lldb_version: Option<String>,
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lldb_python_dir: Option<String>,
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// Runtime state filled in later on
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cc: HashMap<String, (gcc::Tool, Option<PathBuf>)>,
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cxx: HashMap<String, gcc::Tool>,
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crates: HashMap<String, Crate>,
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}
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#[derive(Debug)]
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struct Crate {
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name: String,
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deps: Vec<String>,
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path: PathBuf,
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doc_step: String,
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build_step: String,
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test_step: String,
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}
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/// The various "modes" of invoking Cargo.
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///
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/// These entries currently correspond to the various output directories of the
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/// build system, with each mod generating output in a different directory.
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#[derive(Clone, Copy)]
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pub enum Mode {
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/// This cargo is going to build the standard library, placing output in the
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/// "stageN-std" directory.
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Libstd,
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/// This cargo is going to build libtest, placing output in the
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/// "stageN-test" directory.
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Libtest,
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/// This cargo is going to build librustc and compiler libraries, placing
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/// output in the "stageN-rustc" directory.
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Librustc,
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/// This cargo is going to some build tool, placing output in the
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/// "stageN-tools" directory.
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Tool,
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}
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impl Build {
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/// Creates a new set of build configuration from the `flags` on the command
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/// line and the filesystem `config`.
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///
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/// By default all build output will be placed in the current directory.
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pub fn new(flags: Flags, config: Config) -> Build {
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let cwd = t!(env::current_dir());
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let src = flags.src.clone().or_else(|| {
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env::var_os("SRC").map(|x| x.into())
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}).unwrap_or(cwd.clone());
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let out = cwd.join("build");
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let stage0_root = out.join(&config.build).join("stage0/bin");
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let rustc = match config.rustc {
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Some(ref s) => PathBuf::from(s),
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None => stage0_root.join(exe("rustc", &config.build)),
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};
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let cargo = match config.cargo {
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Some(ref s) => PathBuf::from(s),
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None => stage0_root.join(exe("cargo", &config.build)),
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};
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let local_rebuild = config.local_rebuild;
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Build {
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flags: flags,
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config: config,
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cargo: cargo,
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rustc: rustc,
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src: src,
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out: out,
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release: String::new(),
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unstable_features: false,
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ver_hash: None,
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short_ver_hash: None,
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ver_date: None,
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version: String::new(),
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local_rebuild: local_rebuild,
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bootstrap_key: String::new(),
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bootstrap_key_stage0: String::new(),
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package_vers: String::new(),
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cc: HashMap::new(),
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cxx: HashMap::new(),
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crates: HashMap::new(),
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gdb_version: None,
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lldb_version: None,
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lldb_python_dir: None,
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}
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}
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/// Executes the entire build, as configured by the flags and configuration.
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pub fn build(&mut self) {
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unsafe {
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job::setup();
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}
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if let Subcommand::Clean = self.flags.cmd {
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return clean::clean(self);
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}
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self.verbose("finding compilers");
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cc::find(self);
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self.verbose("running sanity check");
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sanity::check(self);
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self.verbose("collecting channel variables");
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channel::collect(self);
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// If local-rust is the same major.minor as the current version, then force a local-rebuild
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let local_version_verbose = output(
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Command::new(&self.rustc).arg("--version").arg("--verbose"));
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let local_release = local_version_verbose
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.lines().filter(|x| x.starts_with("release:"))
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.next().unwrap().trim_left_matches("release:").trim();
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if local_release.split('.').take(2).eq(self.release.split('.').take(2)) {
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self.verbose(&format!("auto-detected local-rebuild {}", local_release));
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self.local_rebuild = true;
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}
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self.verbose("updating submodules");
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self.update_submodules();
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self.verbose("learning about cargo");
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metadata::build(self);
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step::run(self);
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}
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/// Updates all git submodules that we have.
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///
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/// This will detect if any submodules are out of date an run the necessary
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/// commands to sync them all with upstream.
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fn update_submodules(&self) {
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struct Submodule<'a> {
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path: &'a Path,
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state: State,
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}
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enum State {
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// The submodule may have staged/unstaged changes
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MaybeDirty,
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// Or could be initialized but never updated
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NotInitialized,
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// The submodule, itself, has extra commits but those changes haven't been commited to
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// the (outer) git repository
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OutOfSync,
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}
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if !self.config.submodules {
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return
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}
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if fs::metadata(self.src.join(".git")).is_err() {
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return
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}
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let git = || {
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let mut cmd = Command::new("git");
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cmd.current_dir(&self.src);
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return cmd
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};
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let git_submodule = || {
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let mut cmd = Command::new("git");
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cmd.current_dir(&self.src).arg("submodule");
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return cmd
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};
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// FIXME: this takes a seriously long time to execute on Windows and a
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// nontrivial amount of time on Unix, we should have a better way
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// of detecting whether we need to run all the submodule commands
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// below.
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let out = output(git_submodule().arg("status"));
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let mut submodules = vec![];
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for line in out.lines() {
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// NOTE `git submodule status` output looks like this:
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//
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// -5066b7dcab7e700844b0e2ba71b8af9dc627a59b src/liblibc
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// +b37ef24aa82d2be3a3cc0fe89bf82292f4ca181c src/compiler-rt (remotes/origin/..)
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// e058ca661692a8d01f8cf9d35939dfe3105ce968 src/jemalloc (3.6.0-533-ge058ca6)
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//
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// The first character can be '-', '+' or ' ' and denotes the `State` of the submodule
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// Right next to this character is the SHA-1 of the submodule HEAD
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// And after that comes the path to the submodule
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let path = Path::new(line[1..].split(' ').skip(1).next().unwrap());
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let state = if line.starts_with('-') {
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State::NotInitialized
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} else if line.starts_with('+') {
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State::OutOfSync
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} else if line.starts_with(' ') {
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State::MaybeDirty
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} else {
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panic!("unexpected git submodule state: {:?}", line.chars().next());
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};
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submodules.push(Submodule { path: path, state: state })
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}
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self.run(git_submodule().arg("sync"));
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for submodule in submodules {
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// If using llvm-root then don't touch the llvm submodule.
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if submodule.path.components().any(|c| c == Component::Normal("llvm".as_ref())) &&
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self.config.target_config.get(&self.config.build)
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.and_then(|c| c.llvm_config.as_ref()).is_some()
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{
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continue
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}
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if submodule.path.components().any(|c| c == Component::Normal("jemalloc".as_ref())) &&
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!self.config.use_jemalloc
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{
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continue
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}
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// `submodule.path` is the relative path to a submodule (from the repository root)
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// `submodule_path` is the path to a submodule from the cwd
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// use `submodule.path` when e.g. executing a submodule specific command from the
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// repository root
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// use `submodule_path` when e.g. executing a normal git command for the submodule
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// (set via `current_dir`)
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let submodule_path = self.src.join(submodule.path);
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match submodule.state {
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State::MaybeDirty => {
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// drop staged changes
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self.run(git().current_dir(&submodule_path)
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.args(&["reset", "--hard"]));
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// drops unstaged changes
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self.run(git().current_dir(&submodule_path)
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.args(&["clean", "-fdx"]));
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},
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State::NotInitialized => {
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self.run(git_submodule().arg("init").arg(submodule.path));
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self.run(git_submodule().arg("update").arg(submodule.path));
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},
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State::OutOfSync => {
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// drops submodule commits that weren't reported to the (outer) git repository
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self.run(git_submodule().arg("update").arg(submodule.path));
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self.run(git().current_dir(&submodule_path)
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.args(&["reset", "--hard"]));
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self.run(git().current_dir(&submodule_path)
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.args(&["clean", "-fdx"]));
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},
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}
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}
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}
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/// Clear out `dir` if `input` is newer.
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///
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/// After this executes, it will also ensure that `dir` exists.
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fn clear_if_dirty(&self, dir: &Path, input: &Path) {
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let stamp = dir.join(".stamp");
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if mtime(&stamp) < mtime(input) {
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self.verbose(&format!("Dirty - {}", dir.display()));
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let _ = fs::remove_dir_all(dir);
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} else if stamp.exists() {
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return
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}
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t!(fs::create_dir_all(dir));
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t!(File::create(stamp));
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}
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/// Prepares an invocation of `cargo` to be run.
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///
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/// This will create a `Command` that represents a pending execution of
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/// Cargo. This cargo will be configured to use `compiler` as the actual
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/// rustc compiler, its output will be scoped by `mode`'s output directory,
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/// it will pass the `--target` flag for the specified `target`, and will be
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/// executing the Cargo command `cmd`.
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fn cargo(&self,
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compiler: &Compiler,
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mode: Mode,
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target: &str,
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cmd: &str) -> Command {
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let mut cargo = Command::new(&self.cargo);
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let out_dir = self.stage_out(compiler, mode);
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cargo.env("CARGO_TARGET_DIR", out_dir)
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.arg(cmd)
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.arg("-j").arg(self.jobs().to_string())
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.arg("--target").arg(target);
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// FIXME: Temporary fix for https://github.com/rust-lang/cargo/issues/3005
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// Force cargo to output binaries with disambiguating hashes in the name
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cargo.env("__CARGO_DEFAULT_LIB_METADATA", "1");
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let stage;
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if compiler.stage == 0 && self.local_rebuild {
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// Assume the local-rebuild rustc already has stage1 features.
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stage = 1;
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} else {
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stage = compiler.stage;
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}
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// Customize the compiler we're running. Specify the compiler to cargo
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// as our shim and then pass it some various options used to configure
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// how the actual compiler itself is called.
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//
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// These variables are primarily all read by
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// src/bootstrap/{rustc,rustdoc.rs}
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cargo.env("RUSTC", self.out.join("bootstrap/debug/rustc"))
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.env("RUSTC_REAL", self.compiler_path(compiler))
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.env("RUSTC_STAGE", stage.to_string())
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.env("RUSTC_DEBUGINFO", self.config.rust_debuginfo.to_string())
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.env("RUSTC_DEBUGINFO_LINES", self.config.rust_debuginfo_lines.to_string())
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.env("RUSTC_CODEGEN_UNITS",
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self.config.rust_codegen_units.to_string())
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.env("RUSTC_DEBUG_ASSERTIONS",
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self.config.rust_debug_assertions.to_string())
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.env("RUSTC_SNAPSHOT", &self.rustc)
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.env("RUSTC_SYSROOT", self.sysroot(compiler))
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.env("RUSTC_LIBDIR", self.rustc_libdir(compiler))
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.env("RUSTC_SNAPSHOT_LIBDIR", self.rustc_snapshot_libdir())
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.env("RUSTC_RPATH", self.config.rust_rpath.to_string())
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.env("RUSTDOC", self.out.join("bootstrap/debug/rustdoc"))
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.env("RUSTDOC_REAL", self.rustdoc(compiler))
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.env("RUSTC_FLAGS", self.rustc_flags(target).join(" "));
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self.add_bootstrap_key(&mut cargo);
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// Specify some various options for build scripts used throughout
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// the build.
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//
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// FIXME: the guard against msvc shouldn't need to be here
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if !target.contains("msvc") {
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cargo.env(format!("CC_{}", target), self.cc(target))
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.env(format!("AR_{}", target), self.ar(target).unwrap()) // only msvc is None
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.env(format!("CFLAGS_{}", target), self.cflags(target).join(" "));
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}
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// Environment variables *required* needed throughout the build
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//
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// FIXME: should update code to not require this env var
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cargo.env("CFG_COMPILER_HOST_TRIPLE", target);
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if self.config.verbose || self.flags.verbose {
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cargo.arg("-v");
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}
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if self.config.rust_optimize {
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cargo.arg("--release");
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}
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return cargo
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}
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/// Get a path to the compiler specified.
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fn compiler_path(&self, compiler: &Compiler) -> PathBuf {
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if compiler.is_snapshot(self) {
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self.rustc.clone()
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} else {
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self.sysroot(compiler).join("bin").join(exe("rustc", compiler.host))
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}
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}
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/// Get the specified tool built by the specified compiler
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fn tool(&self, compiler: &Compiler, tool: &str) -> PathBuf {
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self.cargo_out(compiler, Mode::Tool, compiler.host)
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.join(exe(tool, compiler.host))
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}
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/// Get the `rustdoc` executable next to the specified compiler
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fn rustdoc(&self, compiler: &Compiler) -> PathBuf {
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let mut rustdoc = self.compiler_path(compiler);
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rustdoc.pop();
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rustdoc.push(exe("rustdoc", compiler.host));
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return rustdoc
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}
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|
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/// Get a `Command` which is ready to run `tool` in `stage` built for
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/// `host`.
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fn tool_cmd(&self, compiler: &Compiler, tool: &str) -> Command {
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let mut cmd = Command::new(self.tool(&compiler, tool));
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let host = compiler.host;
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let paths = vec![
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self.cargo_out(compiler, Mode::Libstd, host).join("deps"),
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self.cargo_out(compiler, Mode::Libtest, host).join("deps"),
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self.cargo_out(compiler, Mode::Librustc, host).join("deps"),
|
|
self.cargo_out(compiler, Mode::Tool, host).join("deps"),
|
|
];
|
|
add_lib_path(paths, &mut cmd);
|
|
return cmd
|
|
}
|
|
|
|
/// Get the space-separated set of activated features for the standard
|
|
/// library.
|
|
fn std_features(&self) -> String {
|
|
let mut features = String::new();
|
|
if self.config.debug_jemalloc {
|
|
features.push_str(" debug-jemalloc");
|
|
}
|
|
if self.config.use_jemalloc {
|
|
features.push_str(" jemalloc");
|
|
}
|
|
if self.config.backtrace {
|
|
features.push_str(" backtrace");
|
|
}
|
|
return features
|
|
}
|
|
|
|
/// Get the space-separated set of activated features for the compiler.
|
|
fn rustc_features(&self) -> String {
|
|
let mut features = String::new();
|
|
if self.config.use_jemalloc {
|
|
features.push_str(" jemalloc");
|
|
}
|
|
return features
|
|
}
|
|
|
|
/// Component directory that Cargo will produce output into (e.g.
|
|
/// release/debug)
|
|
fn cargo_dir(&self) -> &'static str {
|
|
if self.config.rust_optimize {"release"} else {"debug"}
|
|
}
|
|
|
|
/// 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 sysroot(&self, compiler: &Compiler) -> PathBuf {
|
|
if compiler.stage == 0 {
|
|
self.out.join(compiler.host).join("stage0-sysroot")
|
|
} else {
|
|
self.out.join(compiler.host).join(format!("stage{}", compiler.stage))
|
|
}
|
|
}
|
|
|
|
/// Returns the libdir where the standard library and other artifacts are
|
|
/// found for a compiler's sysroot.
|
|
fn sysroot_libdir(&self, compiler: &Compiler, target: &str) -> PathBuf {
|
|
self.sysroot(compiler).join("lib").join("rustlib")
|
|
.join(target).join("lib")
|
|
}
|
|
|
|
/// Returns the root directory for all output generated in a particular
|
|
/// stage when running with a particular host compiler.
|
|
///
|
|
/// The mode indicates what the root directory is for.
|
|
fn stage_out(&self, compiler: &Compiler, mode: Mode) -> PathBuf {
|
|
let suffix = match mode {
|
|
Mode::Libstd => "-std",
|
|
Mode::Libtest => "-test",
|
|
Mode::Tool => "-tools",
|
|
Mode::Librustc => "-rustc",
|
|
};
|
|
self.out.join(compiler.host)
|
|
.join(format!("stage{}{}", compiler.stage, suffix))
|
|
}
|
|
|
|
/// Returns the root output directory for all Cargo output in a given stage,
|
|
/// running a particular comipler, wehther or not we're building the
|
|
/// standard library, and targeting the specified architecture.
|
|
fn cargo_out(&self,
|
|
compiler: &Compiler,
|
|
mode: Mode,
|
|
target: &str) -> PathBuf {
|
|
self.stage_out(compiler, mode).join(target).join(self.cargo_dir())
|
|
}
|
|
|
|
/// Root output directory for LLVM compiled for `target`
|
|
///
|
|
/// Note that if LLVM is configured externally then the directory returned
|
|
/// will likely be empty.
|
|
fn llvm_out(&self, target: &str) -> PathBuf {
|
|
self.out.join(target).join("llvm")
|
|
}
|
|
|
|
/// Output directory for all documentation for a target
|
|
fn doc_out(&self, target: &str) -> PathBuf {
|
|
self.out.join(target).join("doc")
|
|
}
|
|
|
|
/// Returns true if no custom `llvm-config` is set for the specified target.
|
|
///
|
|
/// If no custom `llvm-config` was specified then Rust's llvm will be used.
|
|
fn is_rust_llvm(&self, target: &str) -> bool {
|
|
match self.config.target_config.get(target) {
|
|
Some(ref c) => c.llvm_config.is_none(),
|
|
None => true
|
|
}
|
|
}
|
|
|
|
/// Returns the path to `llvm-config` for the specified target.
|
|
///
|
|
/// If a custom `llvm-config` was specified for target then that's returned
|
|
/// instead.
|
|
fn llvm_config(&self, target: &str) -> PathBuf {
|
|
let target_config = self.config.target_config.get(target);
|
|
if let Some(s) = target_config.and_then(|c| c.llvm_config.as_ref()) {
|
|
s.clone()
|
|
} else {
|
|
self.llvm_out(&self.config.build).join("bin")
|
|
.join(exe("llvm-config", target))
|
|
}
|
|
}
|
|
|
|
/// Returns the path to `FileCheck` binary for the specified target
|
|
fn llvm_filecheck(&self, target: &str) -> PathBuf {
|
|
let target_config = self.config.target_config.get(target);
|
|
if let Some(s) = target_config.and_then(|c| c.llvm_config.as_ref()) {
|
|
s.parent().unwrap().join(exe("FileCheck", target))
|
|
} else {
|
|
let base = self.llvm_out(&self.config.build).join("build");
|
|
let exe = exe("FileCheck", target);
|
|
if self.config.build.contains("msvc") {
|
|
base.join("Release/bin").join(exe)
|
|
} else {
|
|
base.join("bin").join(exe)
|
|
}
|
|
}
|
|
}
|
|
|
|
/// Root output directory for rust_test_helpers library compiled for
|
|
/// `target`
|
|
fn test_helpers_out(&self, target: &str) -> PathBuf {
|
|
self.out.join(target).join("rust-test-helpers")
|
|
}
|
|
|
|
/// Adds the compiler's directory of dynamic libraries to `cmd`'s dynamic
|
|
/// library lookup path.
|
|
fn add_rustc_lib_path(&self, compiler: &Compiler, cmd: &mut Command) {
|
|
// Windows doesn't need dylib path munging because the dlls for the
|
|
// compiler live next to the compiler and the system will find them
|
|
// automatically.
|
|
if cfg!(windows) {
|
|
return
|
|
}
|
|
|
|
add_lib_path(vec![self.rustc_libdir(compiler)], cmd);
|
|
}
|
|
|
|
/// Adds the compiler's bootstrap key to the environment of `cmd`.
|
|
fn add_bootstrap_key(&self, cmd: &mut Command) {
|
|
cmd.env("RUSTC_BOOTSTRAP", "");
|
|
// FIXME: Transitionary measure to bootstrap using the old bootstrap logic.
|
|
// Remove this once the bootstrap compiler uses the new login in Issue #36548.
|
|
cmd.env("RUSTC_BOOTSTRAP_KEY", "62b3e239");
|
|
}
|
|
|
|
/// Returns the compiler's libdir where it stores the dynamic libraries that
|
|
/// it itself links against.
|
|
///
|
|
/// For example this returns `<sysroot>/lib` on Unix and `<sysroot>/bin` on
|
|
/// Windows.
|
|
fn rustc_libdir(&self, compiler: &Compiler) -> PathBuf {
|
|
if compiler.is_snapshot(self) {
|
|
self.rustc_snapshot_libdir()
|
|
} else {
|
|
self.sysroot(compiler).join(libdir(compiler.host))
|
|
}
|
|
}
|
|
|
|
/// Returns the libdir of the snapshot compiler.
|
|
fn rustc_snapshot_libdir(&self) -> PathBuf {
|
|
self.rustc.parent().unwrap().parent().unwrap()
|
|
.join(libdir(&self.config.build))
|
|
}
|
|
|
|
/// Runs a command, printing out nice contextual information if it fails.
|
|
fn run(&self, cmd: &mut Command) {
|
|
self.verbose(&format!("running: {:?}", cmd));
|
|
run_silent(cmd)
|
|
}
|
|
|
|
/// Prints a message if this build is configured in verbose mode.
|
|
fn verbose(&self, msg: &str) {
|
|
if self.flags.verbose || self.config.verbose {
|
|
println!("{}", msg);
|
|
}
|
|
}
|
|
|
|
/// Returns the number of parallel jobs that have been configured for this
|
|
/// build.
|
|
fn jobs(&self) -> u32 {
|
|
self.flags.jobs.unwrap_or(num_cpus::get() as u32)
|
|
}
|
|
|
|
/// Returns the path to the C compiler for the target specified.
|
|
fn cc(&self, target: &str) -> &Path {
|
|
self.cc[target].0.path()
|
|
}
|
|
|
|
/// Returns a list of flags to pass to the C compiler for the target
|
|
/// specified.
|
|
fn cflags(&self, target: &str) -> Vec<String> {
|
|
// Filter out -O and /O (the optimization flags) that we picked up from
|
|
// gcc-rs because the build scripts will determine that for themselves.
|
|
let mut base = self.cc[target].0.args().iter()
|
|
.map(|s| s.to_string_lossy().into_owned())
|
|
.filter(|s| !s.starts_with("-O") && !s.starts_with("/O"))
|
|
.collect::<Vec<_>>();
|
|
|
|
// If we're compiling on OSX then we add a few unconditional flags
|
|
// indicating that we want libc++ (more filled out than libstdc++) and
|
|
// we want to compile for 10.7. This way we can ensure that
|
|
// LLVM/jemalloc/etc are all properly compiled.
|
|
if target.contains("apple-darwin") {
|
|
base.push("-stdlib=libc++".into());
|
|
}
|
|
// This is a hack, because newer binutils broke things on some vms/distros
|
|
// (i.e., linking against unknown relocs disabled by the following flag)
|
|
// See: https://github.com/rust-lang/rust/issues/34978
|
|
match target {
|
|
"i586-unknown-linux-gnu" |
|
|
"i686-unknown-linux-musl" |
|
|
"x86_64-unknown-linux-musl" => {
|
|
base.push("-Wa,-mrelax-relocations=no".into());
|
|
},
|
|
_ => {},
|
|
}
|
|
return base
|
|
}
|
|
|
|
/// Returns the path to the `ar` archive utility for the target specified.
|
|
fn ar(&self, target: &str) -> Option<&Path> {
|
|
self.cc[target].1.as_ref().map(|p| &**p)
|
|
}
|
|
|
|
/// Returns the path to the C++ compiler for the target specified, may panic
|
|
/// if no C++ compiler was configured for the target.
|
|
fn cxx(&self, target: &str) -> &Path {
|
|
match self.cxx.get(target) {
|
|
Some(p) => p.path(),
|
|
None => panic!("\n\ntarget `{}` is not configured as a host,
|
|
only as a target\n\n", target),
|
|
}
|
|
}
|
|
|
|
/// Returns flags to pass to the compiler to generate code for `target`.
|
|
fn rustc_flags(&self, target: &str) -> Vec<String> {
|
|
// New flags should be added here with great caution!
|
|
//
|
|
// It's quite unfortunate to **require** flags to generate code for a
|
|
// target, so it should only be passed here if absolutely necessary!
|
|
// Most default configuration should be done through target specs rather
|
|
// than an entry here.
|
|
|
|
let mut base = Vec::new();
|
|
if target != self.config.build && !target.contains("msvc") &&
|
|
!target.contains("emscripten") {
|
|
base.push(format!("-Clinker={}", self.cc(target).display()));
|
|
}
|
|
return base
|
|
}
|
|
|
|
/// Returns the "musl root" for this `target`, if defined
|
|
fn musl_root(&self, target: &str) -> Option<&Path> {
|
|
self.config.target_config.get(target)
|
|
.and_then(|t| t.musl_root.as_ref())
|
|
.or(self.config.musl_root.as_ref())
|
|
.map(|p| &**p)
|
|
}
|
|
}
|
|
|
|
impl<'a> Compiler<'a> {
|
|
/// Creates a new complier for the specified stage/host
|
|
fn new(stage: u32, host: &'a str) -> Compiler<'a> {
|
|
Compiler { stage: stage, host: host }
|
|
}
|
|
|
|
/// Returns whether this is a snapshot compiler for `build`'s configuration
|
|
fn is_snapshot(&self, build: &Build) -> bool {
|
|
self.stage == 0 && self.host == build.config.build
|
|
}
|
|
}
|