building *-l4re-uclibc targets failed

rustc 1.101.0-nightly (3e92e1a 2026-11-01)
building with -Zbuild-std
affected targets: aarch64-unknown-l4re-uclibc x86_64-unknown-l4re-uclibc

error[: cannot find module or crate `dir` in this scope
     ╭▸ /home/runner/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/std/src/sys/fs/unix.rs:1067:44
     │
1067 │                     mem::ManuallyDrop::new(dir::Dir(unsafe { OwnedFd::from_raw_fd(fd) }));
     │                                            ━━━ use of unresolved module or unlinked crate `dir`
     ╰╴
help: to make use of source file /home/runner/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/std/src/sys/fs/unix/dir.rs, use `mod dir` in this file to declare the module
     ╭▸  /home/runner/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/std/src/lib.rs:454:1
     │
 454 + mod dir;
     ╰╴

For more information about this error, try `rustc --explain E0433`.
error: could not compile `std` (lib) due to 1 previous error

@farao

cc @farao (target maintainer)

We don't do regression testing for tier 3 targets by definition of the target tier policy: https://doc.rust-lang.org/rustc/target-tier-policy.html#tier-3-target-policy

Which is why we rely on individual reports and fixes, because they are not at a point where we can contemplate allowing them to block a merge, which tier 1 and tier 2 targets are allowed to do.

Hi! Thanks a lot for caring about the L4Re target! I'm happy to look into the issue later myself and also happy to be a reviewer of a change.

4. Could you please confirm if this is the intended approach to fix the issue, and whether you would be open to reviewing a contribution for it? Additionally, I'd appreciate any guidance you might have on setting up regression testing for this Tier 3 target.

Agreed that this is the fix. Will you make a change or shall I?

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building `*-l4re-uclibc` targets failed #165324

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maxdexh commented on Nov 2, 2026

Tushar15769 commented on Nov 2, 2026

workingjubilee commented on Nov 3, 2026

Tushar15769 commented on Nov 3, 2026

Tushar15769 commented on Nov 3, 2026

farao commented on Nov 3, 2026

farao commented on Nov 3, 2026

Tushar15769 commented on Nov 3, 2026

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building `*-l4re-uclibc` targets failed #165324