[Mesa-dev] Lets talk about autotools

[Dave Airlie]

On Wed., 28 Nov. 2018, 03:06 Matt Turner <mattst88 at gmail.com wrote:

> On Tue, Nov 27, 2018 at 1:13 AM Timo Aaltonen <tjaalton at ubuntu.com> wrote:
> >
> > On 17.11.2018 6.04, Dylan Baker wrote:
> > > Quoting Dylan Baker (2018-09-17 09:44:07)
> > >> I feel like for !windows meson is in good enough shape at this point
> that we
> > >> can start having the discussion about deleting the autotools build.
> So, is there
> > >> anything left that autotools can do that meson cannot (that we
> actually want to
> > >> implement)? And, what is a reasonable time-table to remove the
> autotools build?
> > >> I think we could reasonably remove it as soon as 18.3 if others felt
> confident
> > >> that it would work for them.
> > >>
> > >> Dylan
> > >
> > > Okay, time for an update on things and a chance to talk about what
> else we need.
> > >
> > > Support for llvm-config (and any binary, actually) overriding has
> landed in
> > > meson, and will be present in the 0.49.0 release, which is due out
> December 9th.
> >
> > Hi, just a note that Ubuntu 18.04 LTS ships with meson 0.45.1 and will
> > get Mesa backports up until and including 20.0.x, so I wonder how
> > complex these required new features in meson are to be backported, or
> > perhaps easily worked around? Backporting a whole new version of meson
> > might not happen..
>
> I understand the LTS concept, but what's the value in never upgrading
> something like a build tool like Meson? Yeah, new versions give a
> possibility of regressions, but with something evolving as quickly as
> Meson the version available in April 2018 becomes less useful for its
> intended purpose with each passing month...
>

Is meson guaranteeing backwards compatibility? Will meson in 2 years build
a package built with meson now?

If I have mesa and another package using meson 0.48, and I update meson to
0.52 will the other package still rebuild fine for things like security
updates?

Dave.

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