Add Android (aarch64) cross-compile support to SwiftTimecodeCore#86
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mansbernhardt wants to merge 3 commits into
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Add Android (aarch64) cross-compile support to SwiftTimecodeCore#86mansbernhardt wants to merge 3 commits into
mansbernhardt wants to merge 3 commits into
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The existing Linux/Glibc/Musl arms in the libc imports cover Linux but
not Android, whose Swift SDK exposes its libc as the `Android` module
(Bionic). Without an `#elseif canImport(Android)` arm, the imports fall
through to no-import on Android and the unqualified `pow`/`powf`/`trunc`
calls + the `ceiling` / `floor` qualified calls fail to resolve.
Verified against the Swift 6.3 open-source toolchain
(org.swift.630202603201a) with the Android Swift SDK artifact bundle
(android28+) — `swift build --target SwiftTimecodeCore --swift-sdk
aarch64-unknown-linux-android28` produces an ELF aarch64 .o.
Also adds a GitHub Actions job that runs the same cross-compile in CI
so future regressions surface immediately.
Files changed:
- Sources/SwiftTimecodeCore/Utilities/Outsourced/FloatingPoint and Darwin.swift:
add canImport(Android) → import Android in 3 places (top imports,
`ceiling`, `floor`).
- Sources/SwiftTimecodeCore/Timecode/Protocol Adoptions/Strideable.swift:
add canImport(Android) → import Android in the imports block.
- .github/workflows/build.yml:
new `android` job builds SwiftTimecodeCore for aarch64-android28
using vapor/swiftly-action to install Swift 6.3 + the Android SDK
artifact bundle.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
`vapor/swiftly-action@v0.2 toolchain: "6.3"` is a floating selector — when Swift 6.3.1 shipped, CI started picking that up and failing to load the Android SDK's pre-built `.swiftmodule` files (which were compiled by 6.3.0). Swift's stable ABI covers the runtime, not the swiftmodule binary format — that requires an exact-version compiler match. Pin to "6.3.0" to track the Android SDK artifactbundle (also pinned to 6.3-RELEASE). Bump both in lockstep when swift.org publishes a 6.3.1 or 6.4 Android SDK bundle (currently 404).
The previous swift sdk install was incomplete — it only fetches Swift-side artifacts (stdlib, Foundation .swiftmodule files). C interop in SwiftOverlayShims needs the NDK's C sysroot (semaphore.h, libc, etc.), and the SDK bundle's destination JSON needs ANDROID_NDK_HOME baked in by the setup-android-sdk.sh script that ships with it. Without these, the build errors mid-compile with: 'semaphore.h' file not found … could not build C module 'SwiftOverlayShims' NDK r27d is paired with swift-6.3-RELEASE Android SDK — bump both together when swift.org publishes a newer SDK bundle.
Owner
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Thanks very much for the submission - I will have a look at this soon. |
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The existing Linux/Glibc/Musl arms in the libc imports cover Linux but not Android, whose Swift SDK exposes its libc as the
Androidmodule (Bionic). Without an#elseif canImport(Android)arm, the imports fall through to no-import on Android and the unqualifiedpow/powf/trunccalls + theceiling/floorqualified calls fail to resolve.Verified against the Swift 6.3 open-source toolchain (org.swift.630202603201a) with the Android Swift SDK artifact bundle (android28+) —
swift build --target SwiftTimecodeCore --swift-sdk aarch64-unknown-linux-android28produces an ELF aarch64 .o.Also adds a GitHub Actions job that runs the same cross-compile in CI so future regressions surface immediately.
Files changed:
ceiling,floor).androidjob builds SwiftTimecodeCore for aarch64-android28 using vapor/swiftly-action to install Swift 6.3 + the Android SDK artifact bundle.