Re: Asynchronous DNS

[Andreas Schwab]

Lars Ingebrigtsen <address@hidden> writes:

> A C question.  I did the obvious
>
>             gai_suspend (&p->dns_request, 1, NULL);
>
> and that gave me this warning:
>
> process.c: In function 'Fdelete_process':
> process.c:861:21: warning: passing argument 1 of 'gai_suspend' from 
> incompatible pointer type [-Wincompatible-pointer-types]
>         gai_suspend (&p->dns_request,
>                      ^
> In file included from process.c:38:0:
> /usr/include/netdb.h:703:12: note: expected 'const struct gaicb * const*' but 
> argument is of type 'struct gaicb **'
>  extern int gai_suspend (const struct gaicb *const __list[], int __ent,
>             ^
>
> Is the only difference here really the consts?  If so, the following
> cast should make stuff "work", but...

Yes, it's a hole in the C type system that has been fixed in C++
(http://c-faq.com/ansi/constmismatch.html).

Andreas.

-- 
Andreas Schwab, SUSE Labs, address@hidden
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