Log message:
lang/python and a number of python packages: re-do atomic64.mk issue.

Evidently, python 3.13 brought in the need to support 64-bit atomics.
This means that python extension packages built with C needs to
use mk/atomic64.mk to make -latomic available on the required 32-bit
ports.  Sadly, there is no reliable way to detect in the .mk files
whether the package is using C (or C++), so this change adds an
unconditional include of mk/atomic64.mk when the python version is
equal to or larger than 3.13 for packages using egg.mk or wheel.mk.

This undoes the individual package Makefile inclusions of mk/atomic64.mk
that I've added over the last few days.

Log message:
devel/py-greenlet: use atomic64.mk to fix build on macppc w/python3.13.

Log message:
py-*: remove unused tool dependency

py-setuptools includes the py-wheel functionality nowadays

Log message:
py-greenlet: require GCC 8

To fix
sorry, unimplemented: non-trivial designated initializers not supported
(tried it with simplified similar code on godbolt)

Comment out FORCE_CXX_STD since it was added for compiling with gcc 4.8.
Re-enable this if it's still needed, with an updated comment, thanks.

Log message:
py-greenlet: updated to 3.1.1

3.1.1 (2024-09-20)

- Fix crashes on 32-bit PPC Linux. Note that there is no CI for this,
  and support is best effort; there may be other issues lurking.
- Remove unnecessary logging sometimes during interpreter shutdown.
- Fix some crashes on 32-bit PPC MacOS. This is a very old platform,
  and is only known to be tested on beta versions of an operating
  system that was never released, using the GCC 14 only provided by
  MacPorts; it may or may not work on the final MacOS X release that
  supported 32-bit PowerPC. It has the known issue of leaking memory
  when greenlets are used in multiple threads. Help debugging this
  would be appreciated.

Log message:
py-greenlet: updated to 3.1.0

3.1.0 (2024-09-10)

This will be the last release to support Python 3.7 and 3.8.

- Adds support for Python 3.13.

  greenlet will not work in no-gil (free threaded) builds of CPython.
  Internally, greenlet heavily depends on the GIL.

- Greatly reduce the chances for crashes during interpreter shutdown.

Log message:
py-greenlet: add upstream bug report URL

Log message:
Re-add support for NetBSD/powerpc.

This time submitted upstream as well, ref.
https://github.com/python-greenlet/greenlet/pull/402

Log message:
py-greenlet: updated to 3.0.3

3.0.3 (2023-12-21)

- Python 3.12: Restore the full ability to walk the stack of a suspended
  greenlet; previously only the innermost frame was exposed.

Log message:
py-greenlet: updated to 3.0.2

3.0.2 (2023-12-08)

- Packaging: Add a minimal ``pyproject.toml`` to sdists.
- Packaging: Various updates to macOS wheels.
- Fix a test case on Arm32. Note that this is not a supported platform
  (there is no CI for it) and support is best effort; there may be
  other issues lurking.