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List:       fedora-devel-list
Subject:    Re: Fedora 32 System-Wide Change proposal: Build Python 3 to statically link with libpython3.8.a for
From:       Miro_Hrončok <mhroncok () redhat ! com>
Date:       2019-11-12 14:34:37
Message-ID: 9139a7f5-b8cf-8a51-a85f-a730ad2c78d8 () redhat ! com
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On 12. 11. 19 14:18, Miro Hrončok wrote:
> On 12. 11. 19 14:00, Miroslav Suchý wrote:
>> Dne 05. 11. 19 v 16:03 Ben Cotton napsal(a):
>>> == Summary ==
>>> Python 3 traditionally in Fedora was built with a shared library
>>> libpython3.?.so and the final binary was dynamically linked against
>>> that shared library. This change is about creating the static library
>>> and linking the final python3 binary against it, as it provides
>>> significant performance improvement, up to 27% depending on the
>>> workload. The static library will not be shipped. The shared library
>>> will continue to exist in a separate subpackage. In essence, python3
>>> will no longer depend on libpython.
>>
>> It seems that we have one group of people who prefer speed and another group 
>> of people who prefer saved space.
>>
>> Instead of focusing on a swiss-knife to satisfy everybody (which will not 
>> work), can we have python3-static **and** python3-dynamic (*) packages and let 
>> users decide which one will be installed and handle `/usr/bin/python3` using 
>> `alternatives(8)`?
>> Then FESCO can "only" decide which one will be the default. And that is far 
>> less controversial than deciding whether you will be forced to use a 
>> time-saving or space-saving solution.
> 
> While I realize that this might actually be a clever thing to do, as the Python 
> maintainer, I don't want this for various reasons. Most importantly, it means we 
> need to to "support" twice that many Python interpreters.
> 
> It would also create a problem in RPM requirements.
> 
> Suppose a package need /usr/bin/python3.8 to be dynamically linked. How do I 
> express that? It would need to harcode some kind of 
> /usr/libexec/python3.8-dynamic? Would this require custom shebangs... etc.? I 
> really don't want to go that way. It's bad on RHEL 8 already, with 
> "platform-python".
> 
> Note that this is my personal opinion, not a team opinion.

I've confirmed this with the team. We are not going to do this, sorry.

We either do the change or don't. I'm personally fine with both options.

-- 
Miro Hrončok
--
Phone: +420777974800
IRC: mhroncok
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