From Newsgroup: comp.lang.python

I have a python module that includes some C++ code that links with the
Python C API

I have now modified the c++ code so that it only uses the Limited API,
and linked with python3.lib instead of python311.lib.

I can now use that python module with different python versions on Windows

But on Linux, it seems that linking to libpython3.so instead of libpython3.11.so.1.0 does not have the same effect, and results in
many unresolved python symbols at link time

Is this functionality only available on Windows?
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From Newsgroup: comp.lang.python

It is not a symlink on my system, where i built python myself, but a
15KB so file. But it seems to lack lots of python symbols.
Maybe what i should do is actually make libpython.so a physical copy
of libpyton311.so before linking to it, so now on any system the
module would look to load libpython.so, which could be pointing to any
version. I'll try that next
Le ven. 29 mars 2024 à 10:10, Barry <barry@barrys-emacs.org> a écrit :

On 28 Mar 2024, at 16:13, Olivier B. via Python-list <python-list@python.org> wrote:

But on Linux, it seems that linking to libpython3.so instead of libpython3.11.so.1.0 does not have the same effect, and results in
many unresolved python symbols at link time

Is this functionality only available on Windows?

Python limited API works on linux, but you do not link against the .so on linux I recall.

You will have missed that libpython3.so is a symlink to libpython3.11.so.10.

Windows build practices do not translate one-to-one to linux, or macOS.

Barry

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From Newsgroup: comp.lang.python

On 29 Mar 2024, at 16:09, Olivier B. <perso.olivier.barthelemy@gmail.com> wrote:

It is not a symlink on my system, where i built python myself, but a
15KB so file. But it seems to lack lots of python symbols.

Maybe what i should do is actually make libpython.so a physical copy
of libpyton311.so before linking to it, so now on any system the
module would look to load libpython.so, which could be pointing to any version. I'll try that next

You do not link against the .so at all. All the symbols you need are defined in the
python process that loads the extension. Try without the -lpython and it should just work.
Barry

Le ven. 29 mars 2024 à 10:10, Barry <barry@barrys-emacs.org> a écrit :

On 28 Mar 2024, at 16:13, Olivier B. via Python-list <python-list@python.org> wrote:

But on Linux, it seems that linking to libpython3.so instead of
libpython3.11.so.1.0 does not have the same effect, and results in
many unresolved python symbols at link time

Is this functionality only available on Windows?

Python limited API works on linux, but you do not link against the .so on linux I recall.

You will have missed that libpython3.so is a symlink to libpython3.11.so.10. >>
Windows build practices do not translate one-to-one to linux, or macOS.

Barry

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