Greenlet

==================

- Add support for Python 3.10. Pre-built binary wheels for 3.10 are
not currently available for all platforms. The greenlet ABI is
different on Python 3.10 from all previous versions, but as 3.10 was
never supported before, and the ABI has not changed on other Python
versions, this is not considered a reason to change greenlet's major
version.

==================

- Fix %s and %r formatting of a greenlet on Python 2. Previously it
would result in a Unicode string instead of a native string. See
`issue 218
<https://github.com/python-greenlet/greenlet/issues/218>`_.

- Move continuous integration from Travis CI to Github Actions.

==================

- Add the ability to set a greenlet's PEP 567 contextvars context
directly, by assigning to the greenlet's ``gr_context`` attribute.
This restores support for some patterns of using greenlets atop an
async environment that became more challenging in 0.4.17. Thanks to
Joshua Oreman, Mike bayer, and Fantix King, among others. See `PR
198 <https://github.com/python-greenlet/greenlet/pull/198/>`_.

- The repr of greenlet objects now includes extra information about
its state. This is purely informative and the details are subject to
change. See `issue 215 <https://github.com/python-greenlet/greenlet/issues/215>`_.

- The ``greenlet`` module is now a package. There are no API changes,
so all existing imports, including from C code, should continue to
work.

- (C API) The undocumented ``GREENLET_VERSION`` macro that defined a string
giving the greenlet version is now deprecated and will not be updated.

- (Documentation) Publish the change log to https://greenlet.readthedocs.io

Supported Platforms
-------------------

- Drop support for Python 2.4, 2.5, 2.6, 3.0, 3.1, 3.2 and 3.4.
The project metadata now includes the ``python_requires`` data to
help installation tools understand supported versions.
- Add partial support for AIX ppc64 and IBM i. Thanks to Jesse
Gorzinski and Kevin Adler. See `PR 197
<https://github.com/python-greenlet/greenlet/pull/197>`_.

Packaging Changes
-----------------

- Require setuptools to build from source.
- Stop asking setuptools to build both .tar.gz and .zip
sdists. PyPI has standardized on .tar.gz for all platforms.
- Stop using a custom distutils command to build
extensions. distutils is deprecated.
- Remove the ability to use the deprecated command
``python setup.py test``. Run greenlet tests with your favorite
unittest-compatible test runner, e.g., ``python -m unittest discover
greenlet.tests``. See `issue 185 <https://github.com/python-greenlet/greenlet/issues/185>`_.
- The directory layout and resulting sdists have changed.
See `issue 184
<https://github.com/python-greenlet/greenlet/issues/184>`_.
- greenlet is now always built with support for tracing and garbage
collection, and, on Python 3.7 and above, support for context
variables. The internal and undocumented C preprocessor macros that
could be used to alter that at compile time have been removed (no
combination other than the defaults was ever tested). This helps
define a stable ABI.

===================
- Support for PEP 567 ContextVars

======
- Support for DEC Alpha architecture
- Support for Python 3.9
- Support for Python 3.10a0

======
- Support for RISC-V architecture
- Workaround a gcc bug on ppc64