Enable statx on musl-libc #3976
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neuschaefer
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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. The statx struct is in a separate file because the style check doesn't allow multiple s! macros in one file, and #[cfg()] doesn't work in s!. 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.
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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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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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libc-test/semverhave been updated*LASTor*MAXareincluded (see #3131)
cd libc-test && cargo test --target mytarget);especially relevant for platforms that may not be checked in CI