Option -pthread in test suite with cross compilers

[Hans-Peter Nilsson]

On Fri, 18 May 2012, Joel Sherrill wrote:
> I don't mind having -pthread be a noop but the leap
> from a having a header file to having a specific gcc
> option is a stretch IMO. Unless EVERY gcc target with
> pthread support is required by gcc to have that option.
> Is that the undocumented(?) intent?

IMHO that would be nice.  ISTR there was discussion here a
*long* while ago in an attempt to universalize -pthread (*for
systems where pthreads are implemented*), that unfortunately
died.

brgds, H-P