Re: [PATCH 0/3] MR5237: Use futexes on macOS for thread-ID alerts.

[Brendan Shanks (＠bshanks)]

Brendan Shanks (@bshanks) commented about dlls/ntdll/unix/sync.c:
>  return ticks_from_time_t( now.tv_sec ) + now.tv_usec * 10 - server_start_time;
>
> }
> -
>
> #ifdef __linux__
>
> +#define HAVE_FUTEX

This seems like it could be confusing, since `HAVE_` defines are usually set by configure. Maybe `USE_FUTEX`?