Who contributed to Mobile platforms on July 26, 2026?

6 developers shipped this update, including engine-flutter-autoroll, compnerd, hamishknight, DougGregor, broadwaylamb, and Vlad Koshkin.

What were the notable Mobile platforms updates?

ClangImporter: support reshaping macros on import, [stdlib] Introduce kotlin.NoClassDefFoundError on non-JVM targets, and [stdlib] Introduce kotlin.NoClassDefFoundError on non-JVM targets.

Mobile platforms

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The Wire · Showcase

SWIFT MACRO IMPORTS AND KOTLIN CLASS INITIALIZATION FIXES SHIP ACROSS PLATFORMS

By RepoJournal · Filed 06:59 UTC on July 26, 2026 · About Mobile platforms

6 people shipped this

broadwaylamb @broadwaylamb 4 cited

compnerd @compnerd 1 cited

hamishknight @hamishknight 1 cited

DougGregor @DougGregor 1 cited

engine-flutter-autoroll @engine-flutter-autoroll

Vlad Koshkin @imbananko

Swift's ClangImporter gains APINotes-driven macro customization while Kotlin standardizes NoClassDefFoundError behavior across JVM and native targets.

Swift is reshaping how macros import from C headers, with ClangImporter now supporting APINotes-driven renaming and type overrides [1]. This closes a long-standing gap in macro flexibility, letting frameworks customize imports without source changes. Meanwhile, Kotlin ships a cross-platform fix: NoClassDefFoundError now appears on non-JVM targets [2], matching JVM behavior when class initialization fails [3]. The Kotlin runtime function has been renamed to align with this new exception [6], ensuring consistent error messages across all platforms [7]. On the Swift side, error messages got tighter too, with switch case notes consolidated into a single diagnostic [4]. And embedded concurrency took a step forward: recursive and non-recursive mutex implementations split apart [5], letting platforms optimize each path independently.

Action items

→ Verify Swift projects using ClangImporter review APINotes macro customizations apple/swift [plan]
→ Update Kotlin/Native projects expecting class initialization errors to use new exception handling JetBrains/kotlin [plan]
→ Monitor Flutter autoroller for Skia and Fuchsia SDK integration issues flutter/flutter [monitor]

References

[1] ClangImporter: support reshaping macros on import ↗ apple/swift
[2] [stdlib] Introduce kotlin.NoClassDefFoundError on non-JVM targets ↗ JetBrains/kotlin
[3] [stdlib] Introduce kotlin.NoClassDefFoundError on non-JVM targets JetBrains/kotlin
[4] [Sema] Consolidate missing switch case notes ↗ apple/swift
[5] [Embedded PAL] Split the recursive mutex entrypoints out from the non-recursive ones ↗ apple/swift
[6] [K/N] Rename the `ThrowFileFailedToInitializeException` runtime function JetBrains/kotlin
[7] [K/N] Use the name of the class in NoClassDefFoundError JetBrains/kotlin

Quick answers

What shipped in Mobile platforms on July 26, 2026?: Swift's ClangImporter gains APINotes-driven macro customization while Kotlin standardizes NoClassDefFoundError behavior across JVM and native targets. In total, 13 commits and 9 pull requests landed.
Who contributed to Mobile platforms on July 26, 2026?: 6 developers shipped this update, including engine-flutter-autoroll, compnerd, hamishknight, DougGregor, broadwaylamb, and Vlad Koshkin.
What were the notable Mobile platforms updates?: ClangImporter: support reshaping macros on import, [stdlib] Introduce kotlin.NoClassDefFoundError on non-JVM targets, and [stdlib] Introduce kotlin.NoClassDefFoundError on non-JVM targets.

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