pitrou commented on code in PR #12763:
URL: https://github.com/apache/arrow/pull/12763#discussion_r894477952
##########
dev/tasks/python-wheels/github.osx.arm64.yml:
##########
@@ -134,6 +134,8 @@ jobs:
$PYTHON -m venv test-arm64-env
source test-arm64-env/bin/activate
pip install --upgrade pip wheel
+ arch -arm64 pip install -r arrow/python/requirements-wheel-test.txt
Review Comment:
Ok, those are universal (or "fat") binaries:
```console
% file /Library/Frameworks/Python.framework/Versions/3.8/bin/python3
/Library/Frameworks/Python.framework/Versions/3.8/bin/python3: Mach-O
universal binary with 2 architectures: [x86_64:Mach-O 64-bit executable x86_64]
[arm64:Mach-O 64-bit executable arm64]
/Library/Frameworks/Python.framework/Versions/3.8/bin/python3 (for
architecture x86_64): Mach-O 64-bit executable x86_64
/Library/Frameworks/Python.framework/Versions/3.8/bin/python3 (for
architecture arm64): Mach-O 64-bit executable arm64
% file /Library/Frameworks/Python.framework/Versions/3.9/bin/python3
/Library/Frameworks/Python.framework/Versions/3.9/bin/python3: Mach-O
universal binary with 2 architectures: [x86_64:Mach-O 64-bit executable x86_64]
[arm64:Mach-O 64-bit executable arm64]
/Library/Frameworks/Python.framework/Versions/3.9/bin/python3 (for
architecture x86_64): Mach-O 64-bit executable x86_64
/Library/Frameworks/Python.framework/Versions/3.9/bin/python3 (for
architecture arm64): Mach-O 64-bit executable arm64
% file /Library/Frameworks/Python.framework/Versions/3.10/bin/python3
/Library/Frameworks/Python.framework/Versions/3.10/bin/python3: Mach-O
universal binary with 2 architectures: [x86_64:Mach-O 64-bit executable x86_64]
[arm64:Mach-O 64-bit executable arm64]
/Library/Frameworks/Python.framework/Versions/3.10/bin/python3 (for
architecture x86_64): Mach-O 64-bit executable x86_64
/Library/Frameworks/Python.framework/Versions/3.10/bin/python3 (for
architecture arm64): Mach-O 64-bit executable arm64
```
By default, therefore, they execute in arm64 mode:
```console
% /Library/Frameworks/Python.framework/Versions/3.10/bin/python3 -c "import
platform; print(platform.machine())"
arm64
% arch -x86_64
/Library/Frameworks/Python.framework/Versions/3.10/bin/python3 -c "import
platform; print(platform.machine())"
x86_64
```
This is with macOS 11.2:
```console
% sw_vers
ProductName: macOS
ProductVersion: 11.2.3
BuildVersion: 20D91
```
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