Anthony Liguori wrote: > On 07/21/2010 04:58 PM, Daniel P. Berrange wrote: > >>Yes there is. Use the version number. > >> > >The version number is not suitable, because features can be removed at > >compile time and/or > > I don't see any features that libvirt would need to know about that are > disabled at compile time that aren't disabled by platform features (i.e. > being on a Linux vs. Windows host). > > > added via patch backports. > > If a distro backports a feature, it should change the QEMU version > string. If it doesn't, that's a distro problem.
To what version? It can't use the newer version if it only backports a subset of features; it would have to use a distro-specific version number or a version string that somehow encodes feature independent of the version number itself, by some agreed libvirt standard. Which isn't far off advertising features in the help string :-) -- Jamie
