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fix: don't build universal2 as a default on macOS arm64 runners #1217

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merged 3 commits into from
Aug 9, 2022
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fix: don't build universal2 as a default on macOS arm64 runners #1217

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61480e2
fix: don't build `universal2` as a default on macOS arm64 runners
mayeut Aug 6, 2022
03c8f5b
Docs/examples updates
joerick Aug 8, 2022
ac42f66
Change expected_wheels to only expect universal2 when a flag is passed
joerick Aug 8, 2022
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4 changes: 0 additions & 4 deletions cibuildwheel/architecture.py
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Original file line number Diff line number Diff line change
Expand Up @@ -66,10 +66,6 @@ def auto_archs(platform: PlatformName) -> set[Architecture]:
if platform == "windows" and native_architecture == Architecture.AMD64:
result.add(Architecture.x86)

if platform == "macos" and native_architecture == Architecture.arm64:
# arm64 can build and test both archs of a universal2 wheel.
result.add(Architecture.universal2)

return result

@staticmethod
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11 changes: 5 additions & 6 deletions docs/faq.md
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Expand Up @@ -53,11 +53,11 @@ to load on Apple Silicon.
available.

Generally speaking, because Pip 20.3 is required for the `universal2` wheel,
most packages should provide both `x86_64` and `universal2` wheels for now.
Once Pip 20.3+ is common on macOS, then it should be possible to ship only the
`universal2` wheel.
most packages should provide both `x86_64` and one of `universal2`/`arm64`
wheels for now. When Pip 20.3+ is common on macOS, then it might be possible
to ship only the `universal2` wheel.

**Apple Silicon wheels are not built by default**, but can be enabled by adding extra archs to the [`CIBW_ARCHS_MACOS` option](options.md#archs) - e.g. `x86_64 arm64 universal2`. Cross-compilation is provided by the Xcode toolchain.
**Apple Silicon wheels are not built by default on Intel runners**, but can be enabled by adding extra archs to the [`CIBW_ARCHS_MACOS` option](options.md#archs) - e.g. `x86_64 arm64`. Cross-compilation is provided by the Xcode toolchain.

!!! important
When cross-compiling on Intel, it is not possible to test `arm64` and the `arm64` part of a `universal2` wheel.
Expand All @@ -66,8 +66,7 @@ Once Pip 20.3+ is common on macOS, then it should be possible to ship only the

Hopefully, cross-compilation is a temporary situation. Once we have widely
available Apple Silicon CI runners, we can build and test `arm64` and
`universal2` wheels natively. That's why `universal2` wheels are not yet built
by default, and require opt-in by setting `CIBW_ARCHS_MACOS`.
`universal2` wheels natively. That's why `universal2`/`arm64` wheels require opt-in by setting `CIBW_ARCHS_MACOS`.

!!! note
Your runner needs Xcode Command Line Tools 12.2 or later to build `universal2` or `arm64`.
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2 changes: 1 addition & 1 deletion docs/options.md
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Expand Up @@ -351,7 +351,7 @@ Default: `auto`
| Linux / Intel | `x86_64` | `x86_64` `i686` | `x86_64` | `i686` |
| Windows / Intel | `AMD64` | `AMD64` `x86` | `AMD64` | `x86` |
| macOS / Intel | `x86_64` | `x86_64` | `x86_64` | |
| macOS / Apple Silicon | `arm64` | `arm64` `universal2` | `arm64` `universal2`| |
| macOS / Apple Silicon | `arm64` | `arm64` | `arm64` | |

If not listed above, `auto` is the same as `native`.

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2 changes: 1 addition & 1 deletion examples/github-apple-silicon.yml
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Expand Up @@ -12,7 +12,7 @@ jobs:
- name: Build wheels
uses: pypa/cibuildwheel@v2.8.1
env:
CIBW_ARCHS_MACOS: x86_64 universal2
CIBW_ARCHS_MACOS: x86_64 arm64

- uses: actions/upload-artifact@v3
with:
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2 changes: 1 addition & 1 deletion test/test_macos_archs.py
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Expand Up @@ -11,7 +11,7 @@

ALL_MACOS_WHEELS = {
*utils.expected_wheels("spam", "0.1.0", machine_arch="x86_64"),
*utils.expected_wheels("spam", "0.1.0", machine_arch="arm64"),
*utils.expected_wheels("spam", "0.1.0", machine_arch="arm64", include_universal2=True),
}


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15 changes: 8 additions & 7 deletions test/utils.py
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Expand Up @@ -116,6 +116,7 @@ def expected_wheels(
macosx_deployment_target="10.9",
machine_arch=None,
python_abi_tags=None,
include_universal2=False,
):
"""
Returns a list of expected wheels from a run of cibuildwheel.
Expand Down Expand Up @@ -199,14 +200,14 @@ def expected_wheels(
arm64_macosx_deployment_target = _get_arm64_macosx_deployment_target(
macosx_deployment_target
)
platform_tags = [
f'macosx_{macosx_deployment_target.replace(".", "_")}_universal2',
f'macosx_{arm64_macosx_deployment_target.replace(".", "_")}_arm64',
]
platform_tags = [f'macosx_{arm64_macosx_deployment_target.replace(".", "_")}_arm64']
else:
platform_tags = [
f'macosx_{macosx_deployment_target.replace(".", "_")}_x86_64',
]
platform_tags = [f'macosx_{macosx_deployment_target.replace(".", "_")}_x86_64']

if include_universal2:
platform_tags.append(
f'macosx_{macosx_deployment_target.replace(".", "_")}_universal2',
)

else:
raise Exception("unsupported platform")
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