GCC headers and DJGPP port

[Mike Stump]

> Date: Wed, 19 Jul 2000 14:26:25 -0400 (EDT)
> From: Eli Zaretskii <eliz@delorie.com>
> To: martin@loewis.home.cs.tu-berlin.de

> Seriously, though: the conclusion was that we didn't like the
> redefinition of NULL in C++ headers (see my other message for the
> problems this causes).  But we couldn't understand why does the C++
> compiler redefines NULL in its headers, so we couldn't find a
> solution that would satisfy us all and avoid breaking the C++
> compiler at the same time.  Perhaps you could help.

Sure, change all definitions of NULL to more closely match gcc's
notion of null, and you're done.  Sprinkle in #undef NULL if you get
redefinition errors.