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| author | Matthias Krüger <matthias.krueger@famsik.de> | 2024-06-15 10:56:43 +0200 |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2024-06-15 10:56:43 +0200 |
| commit | b5dd3d4ada0aba77dafc3433f9abd7f5b37a88c3 (patch) | |
| tree | e3c845149794eea900809282df3cad1017f3196b /compiler/rustc_codegen_llvm/src | |
| parent | 6f21da3bb40f942f0d559f80e897426874006223 (diff) | |
| parent | e2e1afaf6d273f66b5c08a1c2efb16be311f4db7 (diff) | |
| download | rust-b5dd3d4ada0aba77dafc3433f9abd7f5b37a88c3.tar.gz rust-b5dd3d4ada0aba77dafc3433f9abd7f5b37a88c3.zip | |
Rollup merge of #126472 - onur-ozkan:improve-libcxx-build, r=Kobzol
build `libcxx-version` only when it doesn't exist
In https://github.com/rust-lang/rust/issues/126423, it seems like c++ parsing takes quite amount of time on bootstrap startups. This PR makes libcxx-version to be compiled only when it doesn't exist.
A simple demonstration on the overhead of buiding `libcxx-version`:
```sh
$ rm -rf build/host/libcxx-version
$ x build
Building bootstrap
Finished `dev` profile [unoptimized] target(s) in 0.07s
----- LIBCXX VERSION CHECK TOOK: 509ms
Building tool rustdoc (stage1 -> stage2, x86_64-unknown-linux-gnu)
Finished `release` profile [optimized] target(s) in 0.25s
Build completed successfully in 0:00:02
$ x build
Building bootstrap
Finished `dev` profile [unoptimized] target(s) in 0.07s
----- LIBCXX VERSION CHECK TOOK: 2ms
Creating a sysroot for stage2 compiler (use `rustup toolchain link 'name' build/host/stage2`)
Building tool rustdoc (stage1 -> stage2, x86_64-unknown-linux-gnu)
Finished `release` profile [optimized] target(s) in 0.14s
Build completed successfully in 0:00:01
```
Diffstat (limited to 'compiler/rustc_codegen_llvm/src')
0 files changed, 0 insertions, 0 deletions