Re: CVS commit: src/sys/sys

[Simon Burge <simonb%wasabisystems.com@localhost>]

David Laight wrote:

> > Modified Files:
> >     src/sys/sys: null.h
> > 
> > Log Message:
> > Define NULL as (void *)0, unless C++ is being used.
> 
> I don't believe that is valid portable C.
> Although off hand I dont know the counter example.

C99 says:


        The macros are

               NULL

        which expands  to  an  implementation-defined  null  pointer
        constant; and ...

> What about the comparison of function pointers?

gcc331 and lint are both happy with this.

> I just remember reading somewhere that the only valid
> definition for NULL is 0.

What Frank has done doesn't appear to be against any standards
that I can find...

Simon.
--
Simon Burge                            <simonb%wasabisystems.com@localhost>
NetBSD Support and Service:         http://www.wasabisystems.com/