Building for different architecure on Apple Silicon #48

Hello,

I am trying to build i386 (x86) version of python 3.7 on a apple sillicon Mac. Because I want to embed a python tool (USDZ Tools) in my app's sandbox.

I tried to run this command in x86 and moved python 3.7 env to temp folder, then tried to build python3.7. Which spits out this error:
Traceback (most recent call last): File "./setup.py", line 2407, in <module> main() File "./setup.py", line 2402, in main "Tools/scripts/2to3", "Tools/scripts/pyvenv"] File "/Users/TD/Downloads/python3.7/build/components/cpython/Lib/distutils/core.py", line 148, in setup dist.run_commands() File "/Users/TD/Downloads/python3.7/build/components/cpython/Lib/distutils/dist.py", line 966, in run_commands self.run_command(cmd) File "/Users/TD/Downloads/python3.7/build/components/cpython/Lib/distutils/dist.py", line 985, in run_command cmd_obj.run() File "/Users/TD/Downloads/python3.7/build/components/cpython/Lib/distutils/command/build.py", line 135, in run self.run_command(cmd_name) File "/Users/TD/Downloads/python3.7/build/components/cpython/Lib/distutils/cmd.py", line 313, in run_command self.distribution.run_command(command) File "/Users/TD/Downloads/python3.7/build/components/cpython/Lib/distutils/dist.py", line 985, in run_command cmd_obj.run() File "/Users/TD/Downloads/python3.7/build/components/cpython/Lib/distutils/command/build_ext.py", line 340, in run self.build_extensions() File "./setup.py", line 272, in build_extensions missing = self.detect_modules() File "./setup.py", line 868, in detect_modules (tuple(int(n) for n in dep_target.split('.')[0:2]) AttributeError: 'int' object has no attribute 'split' make[3]: *** [sharedmods] Error 1 make[2]: *** [build_all_generate_profile] Error 2 make[1]: *** [profile-gen-stamp] Error 2 make: *** [profile-run-stamp] Error 2 ERROR make exited with code 2

This is probably an error caused by the build script, might need to cast dep_target into a String.

Any potential fix? If not I might have to tear down the entire USDZ Tools and re-write it in modern python or Swift. (I really don't want to do this, it uses a lot of dynamic linked libraries and .so objects.)

Some key requirements:
USDZ Tools only supports python 3.7.x on the x86 architecture (Thx Pixar). And I can not find alternative commandline tools that works well.
Have to run in an app sandbox, because I want to keep this app tidy and get it on App Store.
My app have to write in Swift, because it calls an first party API only supports Swift calling.