[Gc] Re: sigset_t not defined for win32-pthreads

[windev92]

I finally got it to build. I was using GC_PTHREADS macro instead of
GC_WIN32_PTHREADS.
Just be careful with 2 very similar macros GC_WIN32_THREADS and 
GC_WIN32_PTHREADS 

you just need to add a missing condition(present in function definition) :
!defined (GC_WIN32_PTHREADS) in gc_pthread_redirects.h(gcv7.1) to get it 
to compile

#if !defined (GC_DARWIN_THREADS) && !defined (GC_WIN32_PTHREADS)
  int GC_pthread_sigmask(int how, const sigset_t *set, sigset_t *oset);
#endif

However, there is a problem during GC_stop_world, pthread_create wrapper
doesn't register the thread, so it's not suspended during collection.
DARWIN variant doesn't register it either, but it stops all threads of
the process.

rgds