[LyX/ next] Prepare the removal of Python 2 support

[José Matos]

On Fri, 2024-05-31 at 00:02 +0200, Pavel Sanda wrote:
> The research which should be done is to pair aprox. versions
> of Qt, gcc & python in some still alive oold LTS ubuntu/redhat + 2.5
> years.
> It does not make sense to invest time for supporting old gcc when
> the rest won't work anyway.
> 
> I did not do this research yet, but the quick check on my terminal
> showed 3.9.2 and I'm not even running old LTS, so my first guess is
> that you are trying to bump too much...
> 
> Pavel

The current Ubuntu LTS é 24.04, the previous one is Ubuntu 22.04 LTS
jammy. In the oldest version the Python version that comes with the
system is 3.10.4.

https://distrowatch.com/dwres.php?firstlist=debian&secondlist=ubuntu&secondversions=5&resource=compare-packages&firstversions=2

So the previous LTS works even now.


In October of 2026 Python 3.10 will no longer be supported even in
terms of security releases:

https://devguide.python.org/versions/


On the other hand if you want to build for older systems it is possible
to use new tools to build and run.

I did that to build lyx 2.3 for RHEL-7 that come with gcc-4. In that
case it is also possible, and quite easy to install another python
version that does not replace the system.

-- 
José Abílio