Re: [PATCH 1/2] kvm tools: Set up tun interface using ioctls

[Pekka Enberg <penberg@kernel.org>]

On Wed, 2011-04-13 at 21:59 +0800, Asias He wrote:
> On 04/13/2011 09:49 PM, Pekka Enberg wrote:
> > On Wed, 13 Apr 2011, Sasha Levin wrote:
> >> Use ioctls to assign IP address and bring interface up instead of
> >> using ifconfig.
> >>
> >> Signed-off-by: Sasha Levin <levinsasha928@gmail.com>
> > 
> > I'm seeing this:
> > 
> > penberg@tiger:~/linux/tools/kvm$ make
> >   GEN      include/common-cmds.h
> >   CC       8250-serial.o
> >   CC       virtio-blk.o
> >   CC       virtio-net.o
> > cc1: warnings being treated as errors
> > virtio-net.c: In function ‘virtio_net__init’:
> > virtio-net.c:302: error: dereferencing pointer ‘({anonymous})’ does
> > break strict-aliasing rules
> > virtio-net.c:302: note: initialized from here
> > make: *** [virtio-net.o] Error 1
> 
> Hi, Pekka
> 
> I am wondering why is your gcc always stricter than mine?

I have gcc 4.4.3 here. I wouldn't be surprised if those were actually
gcc bugs but and that we should turn off the aliasing checks. However,
for this particular case, it was pretty good at spotting questionable
code so... :-)

			Pekka