[PATCH weston] configure.ac: bump libdrm requirement to 2.4.68

[Peter Hutterer]

On Mon, Jun 11, 2018 at 11:02:19AM +0100, Daniel Stone wrote:
> Hi,
> 
> On 11 June 2018 at 10:25, Pekka Paalanen <ppaalanen at gmail.com> wrote:
> > On Mon, 11 Jun 2018 09:29:49 +1000
> > Peter Hutterer <peter.hutterer at who-t.net> wrote:
> >> +PKG_CHECK_MODULES(LIBDRM, [libdrm >= 2.4.68], [], [AC_MSG_ERROR([
> >>       libdrm is a hard build-time dependency for libweston core,
> >>       but a sufficient version was not found. However, libdrm
> >>       is not a runtime dependency unless you have features
> >
> > this patch is correct, but I would like to hear more opinions if we
> > want to bump the hard build-time dependency from release of Jan 2012 to
> > Apr 2016.
> >
> > If we do this bump, we could remove the fallback definitions for
> > DRM_FORMAT_R8 and DRM_FORMAT_GR88.
> >
> > In case we want to consider bumping even further, DRM_FORMAT_MOD_* were
> > introduced in 2.4.83 (Aug 2017), and atomic in 2.4.78 (Apr 2017).
> 
> I'd be in favour of bumping all the way to .83. It's available in
> Debian testing and unstable, as well as for stable (stretch) via the
> backports.debian.org repository. It's available for Ubuntu 16.04 LTS
> via the xenial-updates repository, and releases since. It's available
> in Yocto Rocko (Oct 2017), but unsurprisingly not in Pyro (May 2017);
> I believe there are a few BSPs based on Pyro and earlier still, but
> they would be pretty trivial bumps to include if vendors want to
> upgrade Weston.
> 
> Either patch is:
> Acked-by: Daniel Stone <daniels at collabora.com>

pekka: gentle ping, if you're happy with this one

Cheers,
   Peter