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| -rw-r--r-- | src/doc/rustc-dev-guide/src/building/how-to-build-and-run.md | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/src/doc/rustc-dev-guide/src/building/how-to-build-and-run.md b/src/doc/rustc-dev-guide/src/building/how-to-build-and-run.md index c4783002b85..d29cd144810 100644 --- a/src/doc/rustc-dev-guide/src/building/how-to-build-and-run.md +++ b/src/doc/rustc-dev-guide/src/building/how-to-build-and-run.md @@ -2,6 +2,24 @@ <!-- toc --> +<div class="warning"> + +For `profile = "library"` users, or users who use `download-rustc = true | "if-unchanged"`, please be advised that +the `./x test library/std` flow where `download-rustc` is active (i.e. no compiler changes) is currently broken. +This is tracked in <https://github.com/rust-lang/rust/issues/142505>. Only the `./x test` flow is affected in this +case, `./x {check,build} library/std` should still work. + +In the short-term, you may need to disable `download-rustc` for `./x test library/std`. This can be done either by: + +1. `./x test library/std --set rust.download-rustc=false` +2. Or set `rust.download-rustc=false` in `bootstrap.toml`. + +Unfortunately that will require building the stage 1 compiler. The bootstrap team is working on this, but +implementing a maintainable fix is taking some time. + +</div> + + The compiler is built using a tool called `x.py`. You will need to have Python installed to run it. |