This is likely one of the final releases to support Python 2.7 and 3.5; future releases will likely target at least Python 3.6+ and MSVC 2017+.

If you are using scikit-build via pyproject.toml, please remember to include setuptools and wheel. A future version of scikit-build may remove the setuptools install-time hard requirement.

New Features

• CMake module /cmake-modules/Cython now uses Cython default arguments. This no longer adds --no-docstrings in Release and MinSizeRel builds, so Cython docstrings are now retained by default. Additionally, --embed-positions is no longer added to Debug and RelWithDebInfo builds. Users can enable these and other Cython arguments via the option CYTHON_FLAGS. See #518 and #519, thanks to @bdice for the improvement.
• Experimental support for ARM64 on Windows. Thanks to @gaborkertesz-linaro in #612.
• Support for MSVC 2022. Thanks to @tttapa for the contribution in #627.
• Support the modern form of target_link_libraries, via SKBUILD_LINK_LIBRARIES_KEYWORD (somewhat experimental). Thanks to @maxbachmann in #611.

Bug fixes

• Update the Ninja path if using the ninja package. This fixes repeated isolated builds. Further path inspection and updates for isolated builds may be considered in the future. #631, thanks to @RUrlus and @segevfiner for help in tracking this down.
• Allow OpenBSD to pass the platform check (untested). See #586.
• Avoid forcing the min macOS version. Behaviour is now inline with setuptools. Users should set MACOSX_DEPLOYMENT_TARGET when building (automatic with cibuildwheel), otherwise you will get the same value Python was compiled with. Note: This may seem like a regression for PyPy until the next release (7.3.8), since it was compiled with 10.7, which is too old to build with on modern macOS - manually set MACOSX_DEPLOYMENT_TARGET (including setting it if unset in your setup.py) for PyPy until 7.3.8. #607
• Fix logging issue when using Setuptools 60.2+. #623
• MacOS cross compiling support fix (for conda-forge) for built-in modules. Thanks to @isuruf for the contribution in #622.
• Better detection of the library path, fixes some issues with PyPy. Thanks to @rkaminsk for the contribution in #620 and #630. PyPy is now part of our testing matrix as of #624. Also @robtaylor in #632.
• Fixed issue when cross-compiling on conda-forge (probably upstream bug, but easy to avoid). #646.