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.
The only reliable way is
to query the QEMU binary to ask it what it actually supports.
And you do that by asking QEMU what it's version number is. If the
version number isn't reliable because a distro backported features
without changing it, then the distro is broken. It's no different than
if we had a capabilities system and a distro added a feature without
adjusting the advertises capabilities.
Regards,
Anthony Liguori
Regards,
Daniel