[libc-commits] [libc] [libc] Enable unistd.h on linux/arm and aarch64 (PR #214429)

[Pavel Labath via libc-commits]

labath wrote:

> LGTM. Thanks!

For visibility, I've removed fpathconf as it fails to build in overlay mode in arm due to a static_assert in `fstatfs`. I *think* the function should be safe to enable in full build, but we don't have a buildbot for that configuration, so I'm keeping it disabled. The other full-build only entry points don't look like they would be susceptible to similar issues, so I've kept them enabled, but I can also remove them if you want to be more cautious.

(@vonosmas)

https://github.com/llvm/llvm-project/pull/214429