Re: [Xen-devel] [PATCH 14 of 18] tools/libvchan: fix build errors caused by Werror in io.c

[Ian Campbell <Ian.Campbell@xxxxxxxxxx>]

On Tue, 2012-04-03 at 11:25 +0100, Ian Jackson wrote:
> Olaf Hering writes ("[PATCH 14 of 18] tools/libvchan: fix build errors caused 
> by Werror in io.c"):
> > tools/libvchan: fix build errors caused by Werror in io.c
> ...
> > io.c:196: warning: ignoring return value of 'writev', declared with 
> > attribute warn_unused_result
> ...
> > -           writev(-1, iov, 2);
> > +           /* Silence gcc warning, will always fail */
> > +           if (writev(-1, iov, 2));
> 
> I still think this is an unpleasant idiom.  Does casting the result to
> void not help ?

What does writev(-1,...) even mean? Can we not just nuke it?

Ian.


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