[PATCH] Fix libgfortran on darwin, hpux and cygwin (PR libfortran/24991)

[Andrew Pinski]

> 
> Jakub Jelinek wrote:
> > Hi!
> > 
> > Turns out that in libstdc++-v3, some targets are explicitely defining
> > _GLIBCXX_GTHREAD_USE_WEAK to 0.  This patch does the same.
> > 
> > It would be good if weakref support gets fixed for darwin, but if darwin
> > has pthread_* not in a separate library, there is no point in using weakref
> > on that platform.
> > 
> > Can anyone test it on darwin, please?  I have tested this on x86_64-linux.
> 
> http://gcc.gnu.org/ml/gcc-testresults/2005-11/msg01238.html
> 
> I have to investigate the timeouts in gfortran. Rebuild now on darwin 
> and solaris.

See http://gcc.gnu.org/ml/gcc-patches/2005-11/msg01851.html

Thanks,
Andrew Pinski