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Reword paragraph on specific value for Py_LIMITED_API (GH-26101)

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Petr Viktorin 2021-05-14 07:22:44 +02:00 committed by GitHub
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Doc/c-api/stable.rst
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@ -41,22 +41,22 @@ embedding Python.)
.. c:macro:: Py_LIMITED_API
Define this macro ``Py_LIMITED_API`` before including ``Python.h`` to
opt in to only use the Limited API.
Define this macro before including ``Python.h`` to opt in to only use
the Limited API, and to select the Limited API version.
Defining ``Py_LIMITED_API`` to ``3`` will limit the available API so that
the extension will work without recompilation with all Python 3.x releases
(x>=2) on the particular :ref:`platform <stable-abi-platform>`.
Define ``Py_LIMITED_API`` to the value of :c:data:`PY_VERSION_HEX`
corresponding to the lowest Python version your extension supports.
The extension will work without recompilation with all Python 3 releases
from the specified one onward, and can use Limited API introduced up to that
version.
Defining ``Py_LIMITED_API`` to a value of :c:data:`PY_VERSION_HEX` will
limit the available API so that the extension will work without
recompilation with all Python 3 releases from the specified one.
This will allow using additional API introduced up to this version,
but the extension will lose compatibility with earlier Python versions.
Rather than using the ``PY_VERSION_HEX`` macro directly, hardcode a minimum
minor version (e.g. ``0x030A0000`` for Python 3.10) for stability when
compiling with future Python versions.
You can also define ``Py_LIMITED_API`` to ``3``. This works the same as
``0x03020000`` (Python 3.2, the version that introduced Limited API).
On Windows, extensions that use the Stable ABI should be linked against
``python3.dll`` rather than a version-specific library such as
``python39.dll``.