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Enable statx on musl-libc #3976

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@neuschaefer neuschaefer commented Oct 16, 2024

Description

This PR adds the statx syscall on Linux/musl, which is available since musl 1.2.5.

Closes: #3972

This PR is currently blocked by #3791 and #3978.

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Checklist

  • Relevant tests in libc-test/semver have been updated
  • No placeholder or unstable values like *LAST or *MAX are
    included (see #3131)
  • Tested locally (cd libc-test && cargo test --target mytarget);
    especially relevant for platforms that may not be checked in CI

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rustbot commented Oct 16, 2024

Thanks for the pull request, and welcome! The Rust team is excited to review your changes, and you should hear from @JohnTitor (or someone else) some time within the next two weeks.

Please see the contribution instructions for more information. Namely, in order to ensure the minimum review times lag, PR authors and assigned reviewers should ensure that the review label (S-waiting-on-review and S-waiting-on-author) stays updated, invoking these commands when appropriate:

  • @rustbot author: the review is finished, PR author should check the comments and take action accordingly
  • @rustbot review: the author is ready for a review, this PR will be queued again in the reviewer's queue

@tgross35
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tgross35 commented Nov 6, 2024

@rustbot blocked

@bors
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bors commented Nov 16, 2024

☔ The latest upstream changes (presumably #4042) made this pull request unmergeable. Please resolve the merge conflicts.

The statx system call and corresponding constants are defined by the
Linux kernel and don't depend on the libc or architecture. The only
difference is whether a libc exports the statx syscall wrapper or not.

We can thus unify the statx definitions for all Linux "like" platforms:
GNU (glibc), Android (bionic), and (in a later commit) musl.

Plain u64 (or uint64_t in C) can't be used for the statx fields because
bionic defines them as __u64, and provides incompatible definitions of
uint64_t and __u64.
Version 1.2.5 of musl-libc added support for the statx system call[1].

[1]: https://musl.libc.org/releases.html
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statx using the musl libc
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