Date: Wed, 8 Mar 2000 15:53:46 +0200 (IST)
From: Eli Zaretskii <eliz AT is DOT elta DOT co DOT il>
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To: Hans-Bernhard Broeker <broeker AT physik DOT rwth-aachen DOT de>
cc: djgpp-workers AT delorie DOT com, DJ Delorie <dj AT delorie DOT com>
Subject: Re: iso646.h and some questions
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On Wed, 8 Mar 2000, Hans-Bernhard Broeker wrote:

> Then, all the
> 
> 	#undef NULL
> 	#define NULL 0
> 
> sequences in the C standard headers could be replaced by
> 
> 	#include <sys/djnull.h>
> 	#ifndef NULL
> 	#define NULL _DJ_NULL
> 	#endif

I like this better.  But isn't it cleaner to have all the #ifndef stuff 
inside sys/djnull.h, instead of exposing it to the public headers?

DJ, do you agree to this solution?

> This should work for both C and C++ compiles. Or doesn't the C++ __null
> evaluate to a C-usable NULL pointer constant, if passed to an extern "C"
> function?

I never took the time to look at the C++ definition and reflect on its 
fine points.  Anyone?