bug#9767: 24.0.90; gdb initialization on Cygwin

[Eli Zaretskii]

> From: Andreas Schwab <schwab@linux-m68k.org>
> Cc: Eli Zaretskii <eliz@gnu.org>,  9767@debbugs.gnu.org
> Date: Wed, 19 Oct 2011 23:03:23 +0200
> 
> Ken Brown <kbrown@cornell.edu> writes:
> 
> > No, wait_reading_process_output treats EINTR as though it meant there's no
> > input available.
> 
> Which is correct because an interrupted select does not report anything.
> And then the loop will be restarted to call select again.

Yes, that's what I thought should be happening.  Sorry if that was
unclear.

So the question is still why no input is being reported, although
wait_reading_process_output should loop and call `select' again.