In Xcode 9's GM release, I am getting some compile-time errors for undefined symbols for architecture arm64 , namely for AVFoundation with: AVCapturePhotoOutput().supportedFlashModes AVCapturePhotoSettings().availablePreviewPhotoPixelFormatTypes In both cases, using their "undocumented" __supportedFlashModes / __availablePreviewPhotoPixelFormatTypes builds just fine. Has anybody encountered the same issues in other frameworks? API does not document such breaking changes , is this a bug?

Xcode 9 GM undefined symbols for architecture arm64

In Xcode 9's GM release, I am getting some compile-time errors for undefined symbols for architecture arm64, namely for AVFoundation with:

In both cases, using their "undocumented" __supportedFlashModes/__availablePreviewPhotoPixelFormatTypes builds just fine.