std.Io.Threaded: clock_nanosleep is not linux-only
clock_nanosleep is specified by POSIX but not implemented on these
hereby shamed operating systems:
* macOS
* OpenBSD (which defines TIMER_ABSTIME for some reason...?)
4319c8924eAndrew Kelley committed on 1/8/2026, 5:13:16 AMparent6a5bb3e