GCC headers and DJGPP port

[Eli Zaretskii]

> From: Mike Stump <mrs@windriver.com>
> Date: Sat, 22 Jul 2000 17:23:25 -0700 (PDT)
> 
> > A similar argument can be made for assert.h, stddef.h, and possibly
> > float.h, but these headers do not cause nearly as much trouble as
> > limits.h.  Limits.h must die.
> 
> If we do this, we should do them all enmass, and then be willing to
> seek out and test on lots of platforms to make sure we don't introduce
> new bugs.

Such a change doesn't have to affect all platforms, and doesn't need
to happen in one go.  It could be conditioned on some sommand-line
option to `configure', or be the default on only some platforms, at
least initially.