[PATCH v3 10/13] don't check for unistd.h

[Joel Brobecker]

> Well, so I thought.  It turned into an insane nightmare.  The unistd
> module pulls <winnt.h> into everything, which stomps all over our
> namespace.
> 
> I'm probably going to revert the whole series tomorrow morning.
> 
> I'll send a bug report to gnulib.

That is too bad... FWIW, I just got the results from building on
all of AdaCore's platforms, and everything was in the green.
I was definitely expecting some breakage, particularly in platforms
such as LynxOS, for instance.

-- 
Joel