Consider building separate python wheels for macOS arm64 & x86-64

[robbievanleeuwen]

The macOS wheels currently uploaded to PyPI are as follows:

• Python 3.11 & 3.12: macos-14 (universal), macos-12 (universal), macos-11 (universal)
• Python 3.10 and below: macos-14 (universal), macos-12 (x86-64), macos-11 (x86-64)

I've run into a few issues where the universal wheel does not work for the given architecture, e.g. below installed on macos-14-arm64 (a github actions runner) gives an error saying it has the x86 version but needs the arm64 version:

import sys
    if sys.version_info.major==2:
        from _rhino3dm import *
    else:
>       from ._rhino3dm import *
E       ImportError: dlopen(/Users/runner/work/section-properties/section-properties/.nox/tests-3-12/lib/python3.12/site-packages/rhino3dm/_rhino3dm.cpython-312-darwin.so, 0x0002): 
tried: '/Users/runner/work/section-properties/section-properties/.nox/tests-3-12/lib/python3.12/site-packages/rhino3dm/_rhino3dm.cpython-312-darwin.so'
(mach-o file, but is an incompatible architecture (have 'x86_64', need 'arm64e' or 'arm64')),
'/System/Volumes/Preboot/Cryptexes/OS/Users/runner/work/section-properties/section-properties/.nox/tests-3-12/lib/python3.12/site-packages/rhino3dm/_rhino3dm.cpython-312-darwin.so'
(no such file), '/Users/runner/work/section-properties/section-properties/.nox/tests-3-12/lib/python3.12/site-packages/rhino3dm/_rhino3dm.cpython-312-darwin.so'
(mach-o file, but is an incompatible architecture (have 'x86_64', need 'arm64e' or 'arm64'))

.nox/tests-3-12/lib/python3.12/site-packages/rhino3dm/__init__.py:5: ImportError

The offending workflow can be found here for more info.

Further on my own mac (intel - x86) I run into a similar issue where after running a pip install rhino3dm in a fresh python 3.12 environment I get an error saying 'have arm64, need x86':

Python 3.12.4 (main, Jun 11 2024, 11:59:07) [Clang 15.0.0 (clang-1500.3.9.4)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> import rhino3dm
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/Users/robbie/.pyenv/versions/test/lib/python3.12/site-packages/rhino3dm/__init__.py", line 5, in <module>
    from ._rhino3dm import *
ImportError: dlopen(/Users/robbie/.pyenv/versions/test/lib/python3.12/site-packages/rhino3dm/_rhino3dm.cpython-312-darwin.so, 0x0002): 
tried: '/Users/robbie/.pyenv/versions/test/lib/python3.12/site-packages/rhino3dm/_rhino3dm.cpython-312-darwin.so' 
(mach-o file, but is an incompatible architecture (have 'arm64', need 'x86_64h' or 'x86_64')),
'/System/Volumes/Preboot/Cryptexes/OS/Users/robbie/.pyenv/versions/test/lib/python3.12/site-packages/rhino3dm/_rhino3dm.cpython-312-darwin.so'
(no such file), '/Users/robbie/.pyenv/versions/test/lib/python3.12/site-packages/rhino3dm/_rhino3dm.cpython-312-darwin.so'
(mach-o file, but is an incompatible architecture (have 'arm64', need 'x86_64h' or 'x86_64')),
'/Users/robbie/.pyenv/versions/3.12.4/envs/test/lib/python3.12/site-packages/rhino3dm/_rhino3dm.cpython-312-darwin.so'
(mach-o file, but is an incompatible architecture (have 'arm64', need 'x86_64h' or 'x86_64')),
'/System/Volumes/Preboot/Cryptexes/OS/Users/robbie/.pyenv/versions/3.12.4/envs/test/lib/python3.12/site-packages/rhino3dm/_rhino3dm.cpython-312-darwin.so'
(no such file), '/Users/robbie/.pyenv/versions/3.12.4/envs/test/lib/python3.12/site-packages/rhino3dm/_rhino3dm.cpython-312-darwin.so'
(mach-o file, but is an incompatible architecture (have 'arm64', need 'x86_64h' or 'x86_64'))

I'm wondering if you would consider splitting the wheels to have discreet arm64 and x86 wheels on PyPI to avoid this issue? Or perhaps I'm missing something?

Many thanks, Robbie

[fraguada]

It could be that we just aren't building the wheels correctly. @jesterKing recently made some changes to the script that we use to build these. Currently it is in dev and will be merged to main with the next release. Hopefully this fixes your issues, and if not, we'll continue working on it.