Re: boost::python and Python 3.12

From: Stefan Seefeld (stefan_at_[hidden])
Date: 2025-04-13 14:04:05

Yes, I agree.

On Sun, Apr 13, 2025 at 6:53 AM Tom Kacvinsky via Boost <
boost_at_[hidden]> wrote:

> On Sun, Mar 16, 2025 at 9:48 PM Tom Kacvinsky <tkacvins_at_[hidden]> wrote:
>
> > While working on a project to upgrade an embedded Python interpreter (to
> > Python 3.12), which  uses boost::python, I noticed the structs from the
> > Python
> > C API now have more members and those extra struct members were not
> > populated in the boost::python code.  In particular I was bit by the enum
> > module
> > crashing our application startup.
> >
> > I noticed this with boost 1.78, but I found the same problematic code in
> > the
> > release that was current as of two months ago (1.87.0, I think).
> >
> > I got things to compile and run, but my approach was to just make the
> code
> > Python 3.12 compliant.  I can prepare a patch that has the appropriate
> > macro
> >
> guards for populating the structs as they relate to different Python
> > versions.
> >
> > I'll read the boost developers guide and follow the necessary steps to
> > submit
> > a fix.
> >
>
> I discovered PYTHON_API_VERSION is not a good test for populating the
> PyTypeObject as that version is the same for Python 3.0 and higher.  So I'm
> thinking that PY_VERSION_HEX might be the appropriate macro guard for
> the changes in the PyTypeObject struct.  Thoughts?
>
> Thanks,
>
> Tom
>
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