Warning for unadorned 0 in varargs lists?

[Joseph S. Myers]

On Mon, 23 Aug 2004, Kaveh R. Ghazi wrote:

>  > In addition, the sentinel is the first variadic argument with the
>  > right value, and subsequent arguments beyond
>  > sentinel_position_from_end of them would be warned for unless
>  > -Wno-format-extra-args.
> 
> I'm not sure this is desirable, suppose a function similar to execle
> accepted a NULL env pointer?  Why require the user to specify extra
> flags?  (I don't feel strongly about this one, it could certainly be
> implemented as a refinement also.)

It's not a problem for it to accept a NULL env pointer, that's still 
exactly one argument after the sentinel.  The point being that if you have 
two arguments after the sentinel (say), only the first would be considered 
and the subsequent ones would be ignored.  Likewise, with execl, any 
arguments after the sentinel are ignored.

-- 
Joseph S. Myers               http://www.srcf.ucam.org/~jsm28/gcc/
    jsm@polyomino.org.uk (personal mail)
    jsm28@gcc.gnu.org (Bugzilla assignments and CCs)