C++ issue on 4.11: kpopupmenu.h [Please review]

Simon Barner barner at FreeBSD.org
Thu Mar 10 11:25:29 PST 2005

Volker Stolz wrote:
> As far as I know, all systems with NULL != 0L have either been molten down
> or are otherwise not in a position to run KDE :)


AFAIK, null pointers in C++ are supposed to be written as 0 (or OL for
(some?) 64 bit platforms).

NULL is a construct that has been introduced with K&R C, where it was
defined as follows:

#define NULL ((void*) 0)

Today's C compilers also accept 0 instead of NULL.

So, in your case, using 0 should be just fine.

Btw.: I just grepped /usr/include on both FreeBSD 4.11 and 5.3, and
in the latter case there seems to have some substantial cleanup regarding

FreeBSD 5 has include/sys/_null.h (which is #included by stdio.h),
whereas 4.x has several places where #ifndef NULL #define ... is used. 

Perhaps some _really_ NULL-savant could step in here and clarify things

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