[Mesa-dev] meson: Build with Python 3

Dylan Baker dylan at pnwbakers.com
Thu Jul 5 15:51:04 UTC 2018


Dave, Brian, and Jose,

IIRC when we discussed migrating piglit to python 3 (and went with a hybrid
approach instead), y'all had requirements to run on python 2, and couldn't
support python 3. Is that still the case, or would moving to python 3 be
acceptable?

Quoting Mathieu Bridon (2018-07-05 06:17:31)
> This patch series allows building Mesa with Python 3.
> 
> The build scripts are kept compatible with Python 2 as well, for those
> platforms which don't have Python 3 yet.
> 
> In fact, only the Meson build system is moved to Python 3, since it is
> the only one I'm 100% sure has Python 3 available. (Meson itself
> requires it)
> 
> I briefly thought about adding an option to the Meson build system to
> control which version of Python to build with, but decided against. I'm
> happy to add it if you think it's necessary.
> 
> I checked (with the `diff` command) that all the scripts output the
> exact same things when built with Meson on:
> 
> * master (as of f9b6dfd919 which includes my patches to make the build
>   output reproducible)
> * the second to last patch in this series (that is, all the scripts
>   changed but still building with Python 2)
> * the last patch in this series (that is, with Python 3)
> 
> Each patch fixes a single type of problem in multiple
> scripts/subsystems. As a result, it should be possible to review and
> merge each patch independently (but probably not in order), without
> breaking the build.
> 
> It's a lot of changes:
> 
>  86 files changed, 1965 insertions(+), 1833 deletions(-)
> 
> The end goal is to be able to eventually remove Python 2 from future
> versions of the Flatpak Freedesktop SDK, Mesa being one of the last few
> things still requiring it.
> 
> For those who prefer reviewing a git repo, I have pushed the changes to
> a fork on the FDO Gitlab:
> 
> *   a branch compatible with both Python 2 and 3, but still building with
>     Python 2:
> 
>     https://gitlab.freedesktop.org/bochecha/mesa/tree/python-2-and-3
> 
> *   a branch building with Python 3:
> 
>     https://gitlab.freedesktop.org/bochecha/mesa/tree/python3
> 
> 
> 
> _______________________________________________
> mesa-dev mailing list
> mesa-dev at lists.freedesktop.org
> https://lists.freedesktop.org/mailman/listinfo/mesa-dev
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