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Add remark on required free disk space (#2073)

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许杰友 Jieyou Xu (Joe) 2024-09-23 20:11:47 +08:00 committed by GitHub
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src/building/how-to-build-and-run.md
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@ -367,4 +367,18 @@ everything up then you only need to run one command!
`rm -rf build` works too, but then you have to rebuild LLVM, which can take
a long time even on fast computers.
## Remarks on disk space
Building the compiler (especially if beyond stage 1) can require significant amounts of free disk
space, possibly around 100GB. This is compounded if you have a separate build directory for
rust-analyzer (e.g. `build-rust-analyzer`). This is easy to hit with dev-desktops which have a [set
disk
quota](https://github.com/rust-lang/simpleinfra/blob/8a59e4faeb75a09b072671c74a7cb70160ebef50/ansible/roles/dev-desktop/defaults/main.yml#L7)
for each user, but this also applies to local development as well. Occassionally, you may need to:
- Remove `build/` directory.
- Remove `build-rust-analyzer/` directory (if you have a separate rust-analyzer build directory)
- Uninstall unnecessary toolchains if you use `cargo-bisect-rustc`. You can check which toolchains
are installed with `rustup toolchain list`.
[^1]: issue[#1707](https://github.com/rust-lang/rustc-dev-guide/issues/1707)