Path: utzoo!attcan!uunet!aplcen!haven!udel!mmdf
From: andrew@eleceng.bradford.ac.uk (Andrew G. Minter)
Newsgroups: comp.os.minix
Subject: Re: stdio.h : NULL
Message-ID: <32115@nigel.ee.udel.edu>
Date: 2 Oct 90 13:19:14 GMT
Sender: mmdf@ee.udel.edu
Lines: 35

>          #ifdef NULL
>          #undef NULL
>          #endif
>          ...
>          #define NULL 0
> This really is bad!! It took me more than 2 hours with mdb to find out why
> the program crashed. Of course, my machine's pointer size is not
> sizeof int. Doesn't   #define NULL  ((void *)0)  do the job an any machine?
> Or do I miss something?

This one caught me to.  NULL is defined as you suggest in a number of other
file in /usr/include, but not in stdio.h!  The very fact that it is defined
in so many places can cause problems when using Bruce Evans' C compiler,
which protests when NULL is redefined.

There seem to be quite a few fixes to small problems of this ilk floating
around the net.  Is anyone planning to collect them and introduce an
official (or even unofficial) 1.6?  We may have to wait a long time before
there is any sign of 2.0.

How would AST feel about some kind of unofficial user group version of
Minix?

Cheers, Andrew
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