[libvirt] [PATCH] Fix macvtap detection by also checking for IFLA_VF_MAX

[Guido Günther]

On Sat, Apr 14, 2012 at 03:45:44PM -0600, Eric Blake wrote:
> On 04/14/2012 11:18 AM, Guido Günther wrote:
> > since this isn't available on older kernels such as Debian Squeeze's
> > 2.6.32. This make --with-macvtap=check work as expected.
> > ---
> >  configure.ac |    3 ++-
> >  1 file changed, 2 insertions(+), 1 deletion(-)
> > 
> > O.k. to apply?
> > Cheers,
> >  -- Guido
> > 
> > diff --git a/configure.ac b/configure.ac
> > index 3f5b3ff..53c9b34 100644
> > --- a/configure.ac
> > +++ b/configure.ac
> > @@ -2534,7 +2534,8 @@ AC_MSG_CHECKING([whether to compile with macvtap support])
> >  if test "$with_macvtap" != "no" ; then
> >      AC_TRY_COMPILE([ #include <sys/socket.h>
> >                       #include <linux/rtnetlink.h> ],
> > -                   [ int x = MACVLAN_MODE_BRIDGE; ],
> > +                   [ int x = MACVLAN_MODE_BRIDGE;
> > +                     int y = IFLA_VF_MAX; ],
> >                     [ with_macvtap=yes ],
> 
> ACK.
Pushed. Thanks. With this we can build on Debian Squeeze again without
any special configure options besides --disable-error. This is still
needed since libnl triggers some warnings:

cc1: warnings being treated as errors
/usr/include/netlink/object.h:58: error: inline function 'nl_object_priv' declared but never defined

Cheers,
 -- Guido