Xcode 9 GM undefined symbols for architecture arm64

Question

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.

1. Has anybody encountered the same issues in other frameworks?
2. API does not document such breaking changes, is this a bug?

Answer 1

They were "inadvertently" marked private. Should be reverted with next release I guess? Workaround above is recommended by Apple.

Official response