[Python-Dev] RE: POSIX thread code and Cygwin

2002年3月22日 16:16:30 -0500

[Gerald S. Williams]
> I submitted another patch to the POSIX threads code.
> It is under SourceForge as patch number 533681.
>> This tells Python to explicitly use the POSIX semaphore
> code for Cygwin. I had inadvertently left a remnant in
> my version of thread.c that forced _POSIX_SEMAPHORES to
> be defined for Cygwin.
>> It turns out _POSIX_SEMAPHORES is only set if __rtems__
> is defined. At the time I didn't know what that meant
> but thought it must have been defined since I got the
> correct code.

I don't understand. If Cygwin requires _rtems_ in order that
_POSIX_SEMAPHORES be defined, then either Cygwin has a bug here, or Cygwin
*needs* _rtems_ if you want to use real-time gimmicks like semaphores. In
either case, I don't think it's Python's place to second-guess the Cygwin
team: report it as a bug to Cygwin, or do whatever they recommend to get
_rtems_ defined in the Cygwin build.