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These are the default package set required by opt-dist to correctly work, hence for people wanting to build a production grade of rustc in a sandboxed / air-gapped environment, these need to be vendored. The size of `rustc-src-nightly.tar.xz` before and after this change: * Before: 298M * After: 323M (+8%) These crates are the default set of packages required by opt-dist to correctly work, hence for people wanting to build a production grade of rustc in an sandboxed / air-gapped environment, these need to be vendored. The size of `rustc-src-nightly.tar.xz` before and after this change: * Before: 298M * After: 323M (+8%) Size change might or might not be a concern. See the previous discussion: https://github.com/rust-lang/rust/pull/125166#issuecomment-2113626468 Previous efforts on making: * https://github.com/rust-lang/rust/pull/125125 * https://github.com/rust-lang/rust/pull/125166 --- Note that extra works still need to be done to make it fully vendored. * The current pinned rustc-perf uses `tempfile::Tempdir` as the working directory when collecting profiles from some of these packages. This "tmp" working directory usage make it impossible for Cargo to pick up the correct vendor sources setting in `.cargo/config.toml` bundled in the rustc-src tarball. [^1] * opt-dist verifies the final built rustc against a subset of rustc test suite. However it rolls out its own `config.toml` without setting `vendor = true`, and that results in `./vendor/` directory removed. [^2] [^1]: |
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Optimized build pipeline
This binary implements a heavily optimized build pipeline for rustc and LLVM artifacts that are used for both for
benchmarking using the perf. bot and for final distribution to users.
It uses LTO, PGO and BOLT to optimize the compiler and LLVM as much as possible. This logic is not part of bootstrap, because it needs to invoke bootstrap multiple times, force-rebuild various artifacts repeatedly and sometimes go around bootstrap's cache mechanism.