Am Mon, 14 Jun 2021 14:38:19 +0100
schrieb Daniel P. Berrangé <[email protected]>:

> Based on this policy, it is clear that the Xen minimum should be
> 4.9 based on version information we can see for the distros.


Just to wrap up here:
The LIBXL_API_VERSION needs to stay at 4.5, because this is the only thing 
known by Xen 4.9.
As a result no code can be removed.
There are 4 LIBXL_HAVE_whatever knobs that appeared between Xen 4.6 and 4.9.
As a result only a few lines of #ifdef/#endif could be removed, no actual code.

So in my opinion it is not worth the effort, the patch for meson.build should 
be applied as it is.

I will leave it to Jim what to do with it.

Olaf

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