[patch?] Write Version.inc at cmake time, not at build time

[Chandler Carruth]

Is it possible to generate Version.inc every time the the VCS changes? I
know this is a little silly, but I really like having assurances that if
there is a revision number is is correct, and it seems likely to be very
fast to test with git at least, and maybe svn.


On Tue, Jan 7, 2014 at 1:02 AM, Nico Weber <thakis at chromium.org> wrote:

> Hi,
>
> I'm seeing a cmake invocation to generate Version.inc on every build, even
> if nothing else needs to be done. r191784 claimed to undo that, but it
> doesn't work for me – and as far as I understand, Version.inc is still
> created through an always-dirty build edge at the moment, so I don't
> understand how this couldn't run on every build either.
>
> The attached patch changes things so that Version.inc is written at cmake
> time. With this, I get empty builds that don't run any build steps.
>
> Nico
>
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