==================
Features added
--------------
* More warnings were added to help users migrate and avoid bugs.
(Github issue :issue:`5650`)
* A warning-like category for performance hints was added that bypasses ``-Werror``.
(Github issue :issue:`5673`)
* FastGIL now uses standard ``thread_local`` in C++.
(Github issue :issue:`5640`)
* ``reference_wrapper`` was added to ``libcpp.functional``.
Patch by Vyas Ramasubramani. (Github issue :issue:`5671`)
* The ``cythonize`` command now supports the ``--cplus`` option known from the ``cython`` command.
(Github issue :issue:`5736`)
Bugs fixed
----------
* Performance regressions where the GIL was needlessly acquired were fixed.
(Github issues :issue:`5670`, :issue:`5700`)
* A reference leak for exceptions in Python 3.12 was resolved.
Patch by Eric Johnson. (Github issue :issue:`5724`)
* ``fastcall`` calls with keyword arguments generated incorrect C code.
(Github issue :issue:`5665`)
* Assigning the type converted result of a conditional (if-else) expression
to ``int`` or ``bool`` variables could lead to incorrect C code.
(Github issue :issue:`5731`)
* Early (unlikely) failures in Python function wrappers no longer set a
traceback in order to simplify the C code flow. Being mostly memory
allocation errors, they probably would never have created a traceback anyway.
(Github issue :issue:`5681`)
* Relative cimports from packages with ``__init__.py`` files could fail.
(Github issue :issue:`5715`)
* Several issues with the Limited API support were resolved.
(Github issues :issue:`5641`, :issue:`5648`, :issue:`5689`)
* The code generated for special-casing both Cython functions and PyCFunctions was cleaned up
to avoid calling C-API functions that were not meant for the other type respectively.
This could previously trigger assertions in CPython debug builds and now also plays better
with the Limited API.
(Github issues :issue:`4804`, :issue:`5739`)
* Fix some C compiler warnings.
Patches by Ralf Gommers, Oleksandr Pavlyk, Sebastian Koslowski et al.
(Github issues :issue:`5651`, :issue:`5663`, :issue:`5668`, :issue:`5717`, :issue:`5726`, :issue:`5734`)
* Generating gdb debugging information failed when using generator expressions.
Patch by Oleksandr Pavlyk. (Github issue :issue:`5552`)
* Passing a ``setuptools.Extension`` into ``cythonize()`` instead of a
``distutils.Extension`` could make it miss the matching extensions.
* ``cython -M`` needlessly required ``distutils``, which made it fail in Python 3.12.
(Github issue :issue:`5681`)
Other changes
-------------
* The visible deprecation warning for ``DEF`` was removed again since it proved
difficult for some users to migrate away from it. The statement is still
meant to be removed at some point (and thus, like ``IF``, should not be
used in new code), but the time for sunset is probably not around the corner.
(Github issue :issue:`4310`)
* The ``np_pythran`` option raise a ``DeprecationWarning`` if it receives other values
than ``True`` and ``False``. This will eventually be disallowed (in line with all
other boolean options).