3fd5fdd8d3
libcompiler-rt.a is dead, long live libcompiler-builtins.rlib This commit moves the logic that used to build libcompiler-rt.a into a compiler-builtins crate on top of the core crate and below the std crate. This new crate still compiles the compiler-rt instrinsics using gcc-rs but produces an .rlib instead of a static library. Also, with this commit rustc no longer passes -lcompiler-rt to the linker. This effectively makes the "no-compiler-rt" field of target specifications a no-op. Users of `no_std` will have to explicitly add the compiler-builtins crate to their crate dependency graph *if* they need the compiler-rt intrinsics. Users of the `std` have to do nothing extra as the std crate depends on compiler-builtins. Finally, this a step towards lazy compilation of std with Cargo as the compiler-rt intrinsics can now be built by Cargo instead of having to be supplied by the user by some other method. closes #34400
48 lines
1.6 KiB
Rust
48 lines
1.6 KiB
Rust
// Copyright 2016 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 `make clean` in rustbuild.
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//!
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//! Responsible for cleaning out a build directory of all old and stale
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//! artifacts to prepare for a fresh build. Currently doesn't remove the
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//! `build/cache` directory (download cache) or the `build/$target/llvm`
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//! directory as we want that cached between builds.
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use std::fs;
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use std::path::Path;
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use Build;
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pub fn clean(build: &Build) {
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rm_rf(build, "tmp".as_ref());
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rm_rf(build, &build.out.join("tmp"));
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for host in build.config.host.iter() {
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let out = build.out.join(host);
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rm_rf(build, &out.join("doc"));
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for stage in 0..4 {
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rm_rf(build, &out.join(format!("stage{}", stage)));
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rm_rf(build, &out.join(format!("stage{}-std", stage)));
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rm_rf(build, &out.join(format!("stage{}-rustc", stage)));
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rm_rf(build, &out.join(format!("stage{}-tools", stage)));
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rm_rf(build, &out.join(format!("stage{}-test", stage)));
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}
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}
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}
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fn rm_rf(build: &Build, path: &Path) {
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if path.exists() {
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build.verbose(&format!("removing `{}`", path.display()));
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t!(fs::remove_dir_all(path));
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}
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}
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