Re: [RFC] Casting NULL pointer

[Mark Kettenis <mark.kettenis@xs4all.nl>]

> Date: Sun, 30 Aug 2015 11:09:45 +0100
> From: Andrew Burgess <andrew.burgess@embecosm.com>
> 
> There are a small (~26) number of places where the NULL pointer is
> cast list this:
> 
>     char *wname = (char *) NULL;
> 
> This compares to a huge number of places (~726) where we don't use a
> cast, so:
> 
>     const char *name = NULL;
> 
> I've never thought that the cast was either necessary or a
> particularly good idea, it feels like unneeded clutter.

The cast isn't necessary in assignments like that.  However it is
still necessary to cast NULL to an appropriate pointer when passing it
as an argument to a varargs function.