svn commit: r189828 - in head: include sys/sys

[Peter Schuller]

> > I'm not the most knowledgable about the various POSIX/XSI
> > compatibility defines and their expected results, but it seems pretty
> > dangerous to me to flat-out #undef it. Who knows what else depends on
> > those being set properly in any given application.
> > 
> > How about only doing it for a new enough OS release to at least avoid
> > breaking older releases, and then communicate the problem upstream and
> > hope for a better fix?
> 
> As I mentioned in an email to vd@ two weeks ago, the problem is
> that GNU pth *already* has a bunch of insidious kludges to try to
> prevent systems headers on various operating systems from
> declaring symbols it wants to clobber. In particular, it defines
> _PTHREAD_H, which hides pthread_kill() when pthread_kill() is
> defined in pthread.h, but not when it is defined in signal.h.
> 
> The options are to either add yet another insidious kludge to GNU
> pth such as the one you suggest, or to add a kludge to FreeBSD
> specifically to support GNU pth in all its brokenness. I agreed to
> try the latter if the former proved to be impractical.

To be clear I'm not suggesting the kludge, but tested what vd@ asked
for and suggested limiting the potential negative impact by limiting
it to >= 8.

I understand that it's an ugly solution either way, but I can't
suggest one that isn't...

Would it make sense to invent a kludge that is at least somewhat
general in nature (__PTHREADS_INVISIBLE or something) which could
possibly be adopted by other OS:es and decrease OS-specific hacks in
pth?

-- 
/ Peter Schuller

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