adding aligned_alloc support for the following:

[devnexen]

• linux glibc/musl.
• all supported BSD implements it.
• apple.
• solarish.

close #3689

[rustbot]

r? @JohnTitor

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[rustbot]

Some changes occurred in solarish module

cc @jclulow, @pfmooney

[safinaskar]

@devnexen , @JohnTitor , CI is failing in main, and I have some observations.

I made PR https://github.com/rust-lang/libc/pull/3693 . All checks have passed at some point in interval 11 May 00:28 - 01:29 UTC, so I assume main ( 8b9d1feea295e92012c44eb17adb4c1d40a61ba0 ) was okay at that time.

But then at 11 May 18:56 UTC I noticed that very same commit in main ( 8b9d1feea295e92012c44eb17adb4c1d40a61ba0 ) has failing CI with platform sparc64-unknown-linux-gnu.

So it seems some external resource was updated, and it broke CI

[devnexen]

the sparc container tends to fail from time to time (e.g. timeout)

[safinaskar]

@devnexen , sparc64 is broken for two days. As you can see, in all PRs for last two days sparc64 did not success.

Also, CI result in this very PR ( https://github.com/rust-lang/libc/pull/3698 ), says qemu-system-sparc64: terminating on signal 15 from pid 1165 (timeout), but also says /prog: /lib/sparc64-linux-gnu/libm.so.6: version GLIBC_2.38 not found (required by /prog)

( https://github.com/rust-lang/libc/actions/runs/9052276084/job/24869832722?pr=3698 )

[tgross35]

It looks like this is available just about everywhere nowadays:

• linux glibc https://github.com/bminor/glibc/blob/b22923abb046311ac9097a36b97b9b97342bac44/stdlib/stdlib.h#L724
• linux musl https://github.com/kraj/musl/blob/2c41ee96f60074fa8ac387e1fcdedba0654fb173/include/stdlib.h#L44
• linux ulibc https://github.com/wbx-github/uclibc-ng/blob/ecbc412d0d93c8b7b77bec6539b290c9da5401cf/include/stdlib.h#L536
• newlib https://github.com/reswitched/newlib/blob/76f6d4e21ed5b621adb75fe99a69704dca831177/newlib/libc/stdlib/aligned_alloc.c#L30
• openbsd https://github.com/openbsd/src/blob/fd042ffdc70d1726d6308c4819514edac16eff53/lib/libc/stdlib/malloc.c#L2342-L2343
• netbsd https://man.netbsd.org/aligned_alloc.3
• freebsd https://man.freebsd.org/cgi/man.cgi?query=aligned_alloc&apropos=0&sektion=3&manpath=FreeBSD+9-current&format=html
• redox https://github.com/redox-os/relibc/blob/a38638542d0f7b0063da3c84833bd72c0f71da88/src/header/stdlib/mod.rs#L122
• haiku https://github.com/haiku/haiku/blob/ba4478ce60f4c0c3f00697981fc87d4e9e66b230/headers/posix/stdlib.h#L52
• aix (well z/os, but I assume they would be the same) https://www.ibm.com/docs/en/zos/2.5.0?topic=functions-aligned-alloc-allocating-aligned-memory-blocks
• nto/qnx https://www.qnx.com/developers/docs/8.0/com.qnx.doc.neutrino.lib_ref/topic/a/aligned_alloc.html

I can't find the Apple docs, but it seems like this is available in more recent versions. So could this just go in unix/mod.rs?

Also please target main and update the commit message with the changes.

@rustbot author

[devnexen]

closed in favor of #3843