Sender:	root AT delorie DOT com
Message-ID:	<38C659A0.CB542657@inti.gov.ar>
Date:	Wed, 08 Mar 2000 10:46:08 -0300
From:	salvador <salvador AT inti DOT gov DOT ar>
Organization:	INTI
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To:	djgpp-workers AT delorie DOT com
CC:	Eli Zaretskii <eliz AT is DOT elta DOT co DOT il>,
	Hans-Bernhard Broeker <broeker AT physik DOT rwth-aachen DOT de>
Subject:	Re: iso646.h and some questions
References:	<Pine DOT LNX DOT 4 DOT 10 DOT 10003081242250 DOT 16372-100000 AT acp3bf>
Reply-To:	djgpp-workers AT delorie DOT com

Hans-Bernhard Broeker wrote:

> > >
> > >     #undef NULL
> > >     #define NULL 0
> >
> > Won't this make trouble in C++ programs?
>
> Why should it?

As Eli told you we already had a thread about it. The GNU library uses _null,
that's an internal value defined by g++. The purpose? better NULL checking.
That's equivalent to 0 and using 0 all works, but the best thing is to let
stdc++ define it. The problem is that it makes collisions like: standard headers
must define it no matters if it was defined, etc.

> This is the exact definition found in current DJGPP
> headers, already. So if there were trouble to expected from that, C++
> programmers would have told us.

It just makes the NULL checkings a weaker (as it ever was) so nobody will note
it. Unless s/he used it in Linux.

SET

--
Salvador Eduardo Tropea (SET). (Electronics Engineer)
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