From: | Alvaro Herrera <alvherre(at)commandprompt(dot)com> |
---|---|
To: | Peter Eisentraut <peter_e(at)gmx(dot)net> |
Cc: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, pgsql-patches(at)postgresql(dot)org, Bruce Momjian <bruce(at)momjian(dot)us> |
Subject: | Re: execl() sentinel |
Date: | 2007-07-18 15:16:17 |
Message-ID: | 20070718151617.GE6651@alvh.no-ip.org |
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Lists: | pgsql-patches |
Peter Eisentraut wrote:
> Am Mittwoch, 18. Juli 2007 16:16 schrieb Tom Lane:
> > You should *not* have to inform the machine that NULL is a pointer.
>
> For variadic functions, that expectation is invalid, AFAIK.
No, what's invalid is that using an unadorned 0 is understood as a "null
pointer" by the compiler. That would happen in a lot of places except
on a variadic function.
However, the platform may define NULL as it wishes, and indeed in our
c.h it is defined (conditionally) as (void *)0. If the platform had
such a definition then it would work without issues.
I assume the platform in question does something like
#define NULL 0
which would be silly.
--
Alvaro Herrera http://www.advogato.org/person/alvherre
"El conflicto es el camino real hacia la unión"
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