Build macOS arm64 wheels natively

[radarhere]

#7766 started testing macOS CI jobs on M1 where available.

We can go further, building macOS M1 wheels natively. This also means that we can start testing macOS M1 wheels, apart from Python 3.8.

[hugovk]

Very nice!

We now also get the two arm64 PyPy wheels, plus testing of them all, for only an extra 4 minutes of build time!

Here we go!

Note: pp310-macosx_arm64, pp39-macosx_arm64 were selected, but can't be built on x86_64 so will be skipped automatically.
Running before_all...
                                                            ✓ 708.81s
...
5 wheels produced in 16 minutes:
  pillow-10.3.0.dev0-cp310-cp310-macosx_11_0_arm64.whl   3,247 kB
  pillow-10.3.0.dev0-cp311-cp311-macosx_11_0_arm64.whl   3,247 kB
  pillow-10.3.0.dev0-cp312-cp312-macosx_11_0_arm64.whl   3,246 kB
  pillow-10.3.0.dev0-cp38-cp38-macosx_11_0_arm64.whl     3,247 kB
  pillow-10.3.0.dev0-cp39-cp39-macosx_11_0_arm64.whl     3,247 kB

https://github.com/python-pillow/Pillow/actions/runs/8098719797/job/22132792628?pr=7843#step:5:11469

Here we go!
...
7 wheels produced in 20 minutes:
  pillow-10.3.0.dev0-cp310-cp310-macosx_11_0_arm64.whl          3,444 kB
  pillow-10.3.0.dev0-cp311-cp311-macosx_11_0_arm64.whl          3,444 kB
  pillow-10.3.0.dev0-cp312-cp312-macosx_11_0_arm64.whl          3,443 kB
  pillow-10.3.0.dev0-cp38-cp38-macosx_11_0_arm64.whl            3,444 kB
  pillow-10.3.0.dev0-cp39-cp39-macosx_11_0_arm64.whl            3,444 kB
  pillow-10.3.0.dev0-pp310-pypy310_pp73-macosx_11_0_arm64.whl   3,415 kB
  pillow-10.3.0.dev0-pp39-pypy39_pp73-macosx_11_0_arm64.whl     3,415 kB

https://github.com/python-pillow/Pillow/actions/runs/8129523783/job/22216725266?pr=7852#step:5:16109

	x86_64	arm64
Running before_all...	708.81	285.90s
Building cp38-macosx_arm64 wheel
CPython 3.8 macOS arm64 - Apple Silicon
Installing Python cp38...	30.47s	21.98s
Setting up build environment...	10.56s	4.97s
Installing build tools...	2.48s	1.38s
Building wheel...	24.69s	82.94s
Repairing wheel...	7.85s	18.57s
cp38-macosx_arm64 finished in	76.07s	129.84s
Building cp39-macosx_arm64 wheel
CPython 3.9 macOS arm64 - Apple Silicon
Installing Python cp39...	28.76s	11.28s
Setting up build environment...	6.94s	3.20s
Installing build tools...	1.69s	0.60s
Building wheel...	24.63s	9.91s
Repairing wheel...	7.85s	3.61s
Testing wheel...		83.57s
cp39-macosx_arm64 finished in	69.89s	112.18s
Building cp310-macosx_arm64 wheel
CPython 3.10 macOS arm64 - Apple Silicon
Installing Python cp310...	29.93s	10.60s
Setting up build environment...	7.16s	3.00s
Installing build tools...	1.52s	0.57s
Building wheel...	19.66s	11.41s
Repairing wheel...	6.08s	4.10s
Testing wheel...		75.86s
cp310-macosx_arm64 finished in	64.36s	105.58s
Building cp311-macosx_arm64 wheel
CPython 3.11 macOS arm64 - Apple Silicon
Installing Python cp311...	0.02s	0.02s
Setting up build environment...	6.55s	3.41s
Installing build tools...	1.16s	0.69s
Building wheel...	19.30s	9.83s
Repairing wheel...	5.97s	3.50s
Testing wheel...		74.04s
cp311-macosx_arm64 finished in	33.02s	91.51s
Building cp312-macosx_arm64 wheel
CPython 3.12 macOS arm64 - Apple Silicon
Installing Python cp312...	0.02s	0.02s
Setting up build environment...	6.23s	3.93s
Installing build tools...	1.48s	0.73s
Building wheel...	20.76s	10.02s
Repairing wheel...	6.00s	3.55s
Testing wheel...		71.79s
cp312-macosx_arm64 finished in	34.50s	90.06s
Building pp39-macosx_arm64 wheel
PyPy 3.9 macOS arm64 - Apple Silicon
Installing Python pp39...		1.97s
Setting up build environment...		3.07s
Installing build tools...		1.16s
Building wheel...		10.83s
Repairing wheel...		3.88s
Testing wheel...		164.64s
pp39-macosx_arm64 finished in		185.58s
Building pp310-macosx_arm64 wheel
PyPy 3.10 macOS arm64 - Apple Silicon
Installing Python pp310...		2.29s
Setting up build environment...		3.77s
Installing build tools...		1.27s
Building wheel...		12.49s
Repairing wheel...		4.31s
Testing wheel...		164.54s
pp310-macosx_arm64 finished in		188.71s
Total	986.65s	1189.36s

[nulano]

Hmm, this seems to have added libwebp.7.1.8.dylib and libsharpyuv.0.0.1.dylib on x86_64:

and libjpeg.8.3.2.dylib on arm64:

For comparison, the list of dylibs was the same on both x86_64 and arm64 before:

[radarhere]

Thanks for spotting. I've pushed a commit that should fix that.