[Mesa-dev] Trouble with missing git_sha1.h when building from a fresh tree

[Emil Velikov]

Hi Haixia Shi,

On 16 June 2016 at 19:46, Haixia Shi <hshi at chromium.org> wrote:
> Posting a question in case someone already know the issue.
>
> I'm observing "missing git_sha1.h" errors sometime after Emil's git_sha1.h
> patches by May 31st. This is not fixed at TOT with the latest patches on
> Makefile.am.
>
> The problem only happens if src/git_sha1.h doesn't exist already. I just
> need to put a dummy git_sha1.h file there to work around the error.
>
> There's a similar bug filed
> (https://bugs.freedesktop.org/show_bug.cgi?id=50976) but the fix for that
> one patches src/Makefile directly, whereas my build flow only requires
> Makefile.am.
>
The bug report in question is ancient and doesn't reflect what we have atm.

I'd imagine that you're using one of the following two:
 - git archive tarballs, or
 - you don't have access to the 'git' executable after the checkout
(using chroot and//or other).

In case of the latter I have a patch that I'm testing atm. Sadly it
won't 'fix' the issue, as that is a deliberate change.

Namely: one should _really_ be using either a proper git checkout
(with the .git folder) or a tarball produced by `make dist' (like the
release ones).

In the case that you use one of the top two, I'd suggest adding the
following or one that produces similar result.

echo '#define MESA_GIT_SHA1 "git-$mesa-checkout-sha1"' > mesa/src/git_sha1.h

Obviously you should already know the actual sha (mesa-checkout-sha1).

Regards,
Emil

P.S. What exactly does TOT mean ?