Groups > comp.lang.python > #197344

Re: Python recompile

From	bart <bc@freeuk.com>
Newsgroups	comp.lang.c, comp.lang.python
Subject	Re: Python recompile
Date	2025-03-04 18:16 +0000
Organization	A noiseless patient Spider
Message-ID	<vq7g1p$1vmg5$1@dont-email.me> (permalink)
References	(11 earlier) <vq6f8p$1pmnk$1@dont-email.me> <vq6gqc$1qcp8$1@dont-email.me> <vq6ips$1pmnk$2@dont-email.me> <vq6j5h$1qosf$1@dont-email.me> <20250304092827.708@kylheku.com>

Cross-posted to 2 groups.

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On 04/03/2025 17:42, Kaz Kylheku wrote:
> On 2025-03-04, Muttley@DastardlyHQ.org <Muttley@DastardlyHQ.org> wrote:
>> On Tue, 4 Mar 2025 09:57:16 +0000
>> Richard Heathfield <rjh@cpax.org.uk> wibbled:
>>> On 04/03/2025 09:23, Muttley@DastardlyHQ.org wrote:
>>>> because plenty of compilation issues are caused by code issues.
>>>
>>> Undoubtedly true, and equally undoubtedly irrelevant in this
>>> case. Were it relevant, the OP would by now have shown us the
>>> problem code.
>>
>> So what you're saying is you can't troubleshoot linking problems. Do you
>> get someone else to compile your code for you?
> 
> Python is not "your code" for any value of "your" referring to any
> regular here in comp.lang.c.
> 
>> A compiler is a compiler, a linker is a linker. Troubleshooting both is part
>> of the development process of any competent C dev. But we know already you
>> don't consider that to be the case because its beyond your abilities.
> 
> Troubleshooting an open source package build problem is often a complex
> problem that in most cases requires direct access to the environment
> where the problem is happening.
> 

The CPython source bundle doesn't come with any makefiles. The first 
step appears to be to run a 35,000-line 'configure' script. Part of its 
job appears to be generate the necessary makefiles. I see options like 
"-fPIC" inside it set according to platform type and other settings.

Maybe the OP was trying to build it independently. I tried it once on 
Windows; I was told by the people at comp.lang.python that it was a 
piece of cake; it wasn't. (I notice this is cross-posted there; I will 
keep that in.)

On Windows, CPython must be built via MSVC, not gcc.

That involving installing VS20xx, a 6GB download, which itself first 
needed a 4GB .NET update. Then I needed GIT. Then SVN. Then MSBUILD 
tools. Then something else...

Whatever I fixed, it always found something else to fail on. After 
several hours and a lot of downloads, I gave up.

> It's actually a case of porting. When Python does not build in some OS
> distro with certain compilers, that's a kind of porting challenge.

Yet CPython exists on Windows; it must work for somebody!

I'd been interested in fiddling with the source to make it faster, but 
the first thing I discovered was that on Linux, CPython makes use of 
gcc's extensions to use computed-gotos for its dispatch loop.

MSVC doesn't have that feature, so on Windows, CPython is a little bit 
slower than on Linux as it has to use a regular 'switch', because the 
developers couldn't manage to build it with gcc on Windows.

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    Re: Python recompile Muttley@dastardlyhq.com - 2025-03-02 16:58 +0000
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        Re: Python recompile Muttley@DastardlyHQ.org - 2025-03-03 08:13 +0000
          Re: Python recompile Richard Heathfield <rjh@cpax.org.uk> - 2025-03-03 08:31 +0000
            Re: Python recompile Muttley@DastardlyHQ.org - 2025-03-03 10:44 +0000
              Re: Python recompile bart <bc@freeuk.com> - 2025-03-03 12:20 +0000
                Re: Python recompile Muttley@DastardlyHQ.org - 2025-03-03 15:03 +0000
              Re: Python recompile Richard Heathfield <rjh@cpax.org.uk> - 2025-03-03 12:47 +0000
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                Re: Python recompile David Brown <david.brown@hesbynett.no> - 2025-03-03 18:22 +0100
                Re: Python recompile Muttley@DastardlyHQ.org - 2025-03-04 08:31 +0000
                Re: Python recompile Kaz Kylheku <643-408-1753@kylheku.com> - 2025-03-04 17:28 +0000
                Re: Python recompile Richard Heathfield <rjh@cpax.org.uk> - 2025-03-03 17:25 +0000
                Re: Python recompile Muttley@DastardlyHQ.org - 2025-03-04 08:32 +0000
                Re: Python recompile Richard Heathfield <rjh@cpax.org.uk> - 2025-03-04 08:56 +0000
                Re: Python recompile Muttley@DastardlyHQ.org - 2025-03-04 09:23 +0000
                Re: Python recompile Richard Heathfield <rjh@cpax.org.uk> - 2025-03-04 09:57 +0000
                Re: Python recompile Muttley@DastardlyHQ.org - 2025-03-04 10:03 +0000
                Re: Python recompile Richard Heathfield <rjh@cpax.org.uk> - 2025-03-04 10:25 +0000
                Re: Python recompile Muttley@DastardlyHQ.org - 2025-03-04 11:19 +0000
                Re: Python recompile Kaz Kylheku <643-408-1753@kylheku.com> - 2025-03-04 17:42 +0000
                Re: Python recompile bart <bc@freeuk.com> - 2025-03-04 18:16 +0000
                Re: Python recompile Muttley@DastardlyHQ.org - 2025-03-05 09:10 +0000
                Re: Python recompile antispam@fricas.org (Waldek Hebisch) - 2025-03-06 19:21 +0000
                Re: Python recompile Muttley@DastardlyHQ.org - 2025-03-07 09:53 +0000
                Re: Python recompile Lawrence D'Oliveiro <ldo@nz.invalid> - 2025-03-07 21:26 +0000
                Re: Python recompile bart <bc@freeuk.com> - 2025-03-07 21:33 +0000
                Re: Python recompile antispam@fricas.org (Waldek Hebisch) - 2025-03-10 14:39 +0000
                Re: Python recompile Lawrence D'Oliveiro <ldo@nz.invalid> - 2025-03-06 03:16 +0000
                Re: Python recompile James Kuyper <jameskuyper@alumni.caltech.edu> - 2025-03-04 19:12 -0500
                Re: Python recompile gazelle@shell.xmission.com (Kenny McCormack) - 2025-03-03 23:42 +0000
                Re: Python recompile geodandw <geodandw@gmail.com> - 2025-03-03 13:29 -0500
                Re: Python recompile James Kuyper <jameskuyper@alumni.caltech.edu> - 2025-03-03 16:52 -0500
              Re: Python recompile Richard Heathfield <rjh@cpax.org.uk> - 2025-03-03 17:19 +0000
                Re: Python recompile geodandw <geodandw@gmail.com> - 2025-03-03 13:33 -0500
                Re: Python recompile Richard Heathfield <rjh@cpax.org.uk> - 2025-03-03 19:15 +0000
                Re: Python recompile geodandw <geodandw@gmail.com> - 2025-03-03 18:51 -0500
                Re: Python recompile Kaz Kylheku <643-408-1753@kylheku.com> - 2025-03-04 00:49 +0000
                Re: Python recompile Richard Heathfield <rjh@cpax.org.uk> - 2025-03-04 02:29 +0000
                Re: Python recompile David Brown <david.brown@hesbynett.no> - 2025-03-04 09:12 +0100
                Re: Python recompile Richard Heathfield <rjh@cpax.org.uk> - 2025-03-04 11:33 +0000
                Re: Python recompile Muffley@DinkyHQ.org - 2025-03-04 12:00 +0000
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                Re: Python recompile Kaz Kylheku <643-408-1753@kylheku.com> - 2025-03-04 18:06 +0000
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  Re: Python recompile antispam@fricas.org (Waldek Hebisch) - 2025-03-02 17:54 +0000
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    Re: Python recompile James Kuyper <jameskuyper@alumni.caltech.edu> - 2025-03-02 13:38 -0500
      Re: Python recompile doctor@doctor.nl2k.ab.ca (The Doctor) - 2025-03-03 00:42 +0000
        Re: Python recompile doctor@doctor.nl2k.ab.ca (The Doctor) - 2025-03-03 00:46 +0000
        Re: Python recompile James Kuyper <jameskuyper@alumni.caltech.edu> - 2025-03-02 22:24 -0500
      Re: Python recompile antispam@fricas.org (Waldek Hebisch) - 2025-03-03 17:20 +0000
        Re: Python recompile Richard Heathfield <rjh@cpax.org.uk> - 2025-03-03 17:28 +0000
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