xcode 9 mach-o linker error

I converted my project from swift 3 to swift 4 and am using the latest version of xcode 9. On building, I get the following error :


Undefined symbols for architecture arm64:

"__T0So22AVCapturePhotoSettingsC12AVFoundation01_abC16SwiftNativeTypesACWP", referenced from: __T06SpotMi8CameraVCC12capturePhotoyypF in CameraVC.o "__T012AVFoundation39_AVCapturePhotoSettingsSwiftNativeTypesPAAE016availablePreviewc11PixelFormatG0SaySo8NSNumberCGfg", referenced from: __T06SpotMi8CameraVCC12capturePhotoyypF in CameraVC.o ld: symbol(s) not found for architecture arm64


I am not able to figureout the issue from the documentation also. Is there an issue with this version of xcode?


I am out of clues. Any help will be much appreciated.


Cheers!

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Iadxworld
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The following AVFoundation APIs are temporarily unavailable in Swift (34378539):


AVCaptureDevice.Format.supportedColorSpaces
AVCaptureDevice.supportedFlashModes
AVCapturePhotoOutput.availablePhotoPixelFormatTypes
AVCapturePhotoOutput.availableRawPhotoPixelFormatTypes
AVCapturePhotoSettings.availablePreviewPhotoPixelFormatTypes


As a workaround, use the SwiftPrivate versions of these API by prepending each API with double underscore (`__`). For example, change `AVCaptureDevice.Format.supportedColorSpaces` to `AVCaptureDevice.Format.__supportedColorSpaces`.

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Developer Tools Engineer
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The following AVFoundation APIs are temporarily unavailable in Swift (34378539):


AVCaptureDevice.Format.supportedColorSpaces
AVCaptureDevice.supportedFlashModes
AVCapturePhotoOutput.availablePhotoPixelFormatTypes
AVCapturePhotoOutput.availableRawPhotoPixelFormatTypes
AVCapturePhotoSettings.availablePreviewPhotoPixelFormatTypes


As a workaround, use the SwiftPrivate versions of these API by prepending each API with double underscore (`__`). For example, change `AVCaptureDevice.Format.supportedColorSpaces` to `AVCaptureDevice.Format.__supportedColorSpaces`.

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Developer Tools Engineer
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I will be submitting my app to AppStore with these swiftPrivate variables. I hope these wont lead to any issues in reviewing process.

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Iadxworld
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Yes, the App Review team is aware of this issue and those symbols should be allowed. If you run into any other issues, please post back here.

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