[issue43886] Extending/embedding Python documentation outdated/incomplete

[Federico Pellegrin]

Federico Pellegrin  added the comment:

Just a small addition:

Specifically in the documentation it talks about embedding:

"
It is not necessarily trivial to find the right flags to pass to your compiler 
(and linker) in order to embed the Python interpreter into your application, 
particularly because Python needs to load library modules implemented as C 
dynamic extensions (.so files) linked against it.


To find out the required compiler and linker flags, you can execute the 
pythonX.Y-config script which is generated as part of the installation process 
(a python3-config script may also be available). This script has several 
options, of which the following will be directly useful to you:
"

But doesn't really say anything about extensions. Is the same python-config 
used therefore for extensions as well?

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[issue43886] Extending/embedding Python documentation outdated/incomplete

[Federico Pellegrin]

New submission from Federico Pellegrin :

Hello,
We had lately some issues with various possible variants of compilation (static 
vs dynamic) with reference to both embedding and extending Python. There are a 
bunch of tickets on the topic (ie. #21536 or #34309) but I guess one important 
point is that the documentation seems to be not very clear on this. Also 
various Linux distros seem to take very different approaches (static/dynamic).

Infact from the current documentation it seems unclear if python-config should 
be used for both or not. We found also some references to a newer --embed flag 
(see ie. #36721) which is not mentioned in the documentation.
Some other sources suggest that python-config should not be used when Python is 
build with Py_ENABLE_SHARED=1. (ref. here: 
https://github.com/conda/conda-build/issues/2738#issuecomment-371148021)

Also the example looks probably outdated, as it mentions Python 3.4

It would be nice if some light would be shed on the correct practice to use and 
the official documentation updated.

Thanks,
Federico

--
assignee: docs@python
components: Documentation
messages: 391370
nosy: docs@python, fede.evol
priority: normal
severity: normal
status: open
title: Extending/embedding Python documentation outdated/incomplete
type: behavior
versions: Python 3.9

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