Larry Ruane wrote:

> There seem to be several thread libraries, and I'm not sure which is the
> most stable or most complete implementation of Posix threads.

   There are several possibilities.  If you don't require preemptive 
threads, pth is probably the most stable library at the moment.  Options 
for preemptive threads are ptl2, unproven-pthreads, and maybe 
mit-phtreads.  I can't really give you a specific recommendation, I did 
encounter minor problems with all of them -- but that was some time ago, 
so YMMV.

   Cheers
       ,
    Rene