Date:	Thu, 20 Jul 2000 22:42:29 +0200
Message-Id:	<200007202042.WAA00946@loewis.home.cs.tu-berlin.de>
From:	"Martin v. Loewis" <martin AT loewis DOT home DOT cs DOT tu-berlin DOT de>
To:	dj AT delorie DOT com
CC:	djgpp-workers AT delorie DOT com, gcc AT gcc DOT gnu DOT org
In-reply-to:	<200007201437.KAA29757@envy.delorie.com> (message from DJ Delorie
	on Thu, 20 Jul 2000 10:37:16 -0400)
Subject:	Re: GCC headers and DJGPP port
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> > I don't know what your copy of stdio.h looks like, however, it
> > should certainly test whether NULL is defined before defining it.
> 
> It doesn't.  It shouldn't have to.  ANSI says that stdio.h provides
> NULL.  

According to ISO C99, NULL is provided by the following headers

locale.h (7.11)
stddef.h (7.17)
stdio.h  (7.19)
stdlib.h (7.20)
string.h (7.21)
time.h   (7.23)
wchar.h  (7.24)

so it is not all that clear that it is provided by stdio.h
exclusively.

> I have a philosophical problem with anyone saying "it should
> certainly test it" because it means that, at the whim of the gcc team,
> we'd need to add yet another test to our standard headers because yet
> another symbol was absconded by the gcc headers.

Please tell me how you implement the above requirement without testing
whether NULL has been defined?

Regards,
Martin

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