Extends support for arm64e to macOS & visionOS platforms #8837
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pmattos
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jakepetroules
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Jun 19, 2025
marcprux
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Jul 7, 2025
) Extends arm64e support for macOS & visionOS apps, besides the existing iOS support. ### Motivation: SwiftPM currently only supports building arm64e packages for iOS. In Xcode 26 we added support to building packages for arm64e targeting macOS & visionOS platforms too. ### Modifications: Conditionally adds "arm64e" to the ARCHS build settings in the `PackagePIFBuilder` used to interface with Swift Build. ### Result: PIF builder nows had the capability of builds packages for arm64e. Note, for now, that this is currently disabled in SwiftPM. I validated this by building a simple macOS executable for arm64e: $ swift package init --type executable --name HelloWorld $ swift run swift-build --package-path HelloWorld --build-system swiftbuild ...and then I inspected the generated binary: $ lipo -archs HelloWorld/.build/arm64-apple-macosx/Products/Debug/HelloWorld arm64e
pmattos
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Jul 25, 2025
### Motivation: I extended arm64e support for macOS & visionOS apps in my previous PR #8837. When enabled, that patch *only* produced the arm64e slice but... The App Store will now accept arm64e for macOS, iOS, and visionOS — arm64e is optional and off by default. But when you turn on arm64e support for packages (ie, using `shouldPackagesBuildForARM64e` PIF builder delegate method) we expect *both* slices in the binary now. ### Modifications: Changes the PIF builder to update the ARCHS settings without overriding it completely, ensuring we get all required slices (ie, a so called fat binary). ### Result: PIF builder nows has the capability of building packages for arm64 and arm64e. (Note, for now, that this is currently disabled in SwiftPM.) I validated this by building a simple macOS executable for arm64e (and force enabling it in SwifPM): $ swift package init --type executable --name HelloWorld $ swift run swift-build --package-path HelloWorld --build-system swiftbuild --configuration release ...and then I inspected the generated binary: $ lipo -archs HelloWorld/.build/arm64-apple-macosx/Products/Release/HelloWorld x86_64 arm64 arm64e Debug builds. With ONLY_ACTIVE_ARCH = "YES" in debug builds, even though you specify multiple architectures in ARCHS, it will still only build for the active architecture during development. This is set to "NO" for release builds.
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Extends arm64e support for macOS & visionOS apps, besides the existing iOS support.
Motivation:
SwiftPM currently only supports building arm64e packages for iOS.
In Xcode 26 we added support to building packages for arm64e targeting macOS & visionOS platforms too.
Modifications:
Conditionally adds
"arm64e"to theARCHSbuild settings in thePackagePIFBuilderused to interface with Swift Build.Result:
PIF builder nows had the capability of builds packages for arm64e. Note, for now, that this is currently disabled in SwiftPM.
I validated this by building a simple macOS executable for arm64e:
...and then I inspected the generated binary: