[Xen-devel] Re: [Xen-changelog] Define Xen interface version for tools build.

[Keir Fraser <Keir.Fraser@xxxxxxxxxxxx>]

On 6 Apr 2006, at 10:04, Muli Ben-Yehuda wrote:

> How about something like the attached?
> - define XEN_LATEST_INTERFACE_VERSION in Config.mk
> - for the tools, it's included from tools/Makefile directly
> - for the Xen and kernel builds, generate public/interface.h with it
> and include that.
> - this has one drawback - the public/ headers aren't self contained
> any more, since interface.h needs to be generated before it's
> used. The only case is this bits us is if someone copies
> include/public.h and tries to use that out of the tree, which doesn't
> seem like a very likely occurance.
We'd like to avoid the kernel sparse tree from becoming very 
intertwined with our repository's build system. I like the current 
method of specifying the interface version via Kconfig, and I think the 
independence that gains us outweighs the hassle of having to update 
both the Kconfig and Xen's xen-compat.h.
The tools definition is a bit of a pain I agree. Hence the suggestion 
we pin it to always select the latest interface version, since we 
currently always build tools and hypervisor as a matched pair.
 -- Keir


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