Re: change in the extention importation with 3.11

[Alastair McKinstry <alastair.mckinstry@sceal.ie>]

On 06/12/2022 16:13, PICCA Frederic-Emmanuel wrote:
> There is a fix from the upstream around enum.
>
>
> https://github.com/boostorg/python/commit/a218babc8daee904a83f550fb66e5cb3f1cb3013
>
>
>   Fix enum_type_object type on Python 3.11
>
> The enum_type_object type inherits from PyLong_Type which is not tracked
> by the GC. Instances doesn't have to be tracked by the GC: remove the
> Py_TPFLAGS_HAVE_GC flag.
>
> The Python C API documentation says:
>
>      "To create a container type, the tp_flags field of the type object
>      must include the Py_TPFLAGS_HAVE_GC and provide an implementation of
>      the tp_traverse handler."
>
> https://docs.python.org/dev/c-api/gcsupport.html
>
> The new exception was introduced in Python 3.11 by:
> python/cpython#88429
>
>
> an opinion ?
I'd favour that being added to boost1.74. It would fix my ecflow bug  
(#1024911).

A minor (?) fix also needed for Swig wrapping too (#1024555)


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Alastair McKinstry,
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