I just upgraded XCode to 10.0 (released on September 17, 2018) and I get the following error when building with the public SDK: /Users/fred/WebKit/Source/WebKit/UIProcess/ios/fullscreen/WKFullscreenStackView.mm:65:34: error: instance method '-setContinuousCorners:' not found (return type defaults to 'id') [-Werror,-Wobjc-method-access] [_backgroundView.get().layer setContinuousCorners:YES]; In file included from /Users/fred/WebKit/WebKitBuild/Debug-iphonesimulator/DerivedSources/WebKit2/unified-sources/UnifiedSource35-mm.mm:1: In file included from /Users/fred/WebKit/Source/WebKit/UIProcess/ios/fullscreen/WKFullScreenViewController.mm:29: In file included from /Users/fred/WebKit/Source/WebKit/UIProcess/ios/fullscreen/WKFullScreenViewController.h:30: In file included from /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator12.0.sdk/System/Library/Frameworks/UIKit.framework/Headers/UIViewController.h:12: In file included from /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator12.0.sdk/System/Library/Frameworks/UIKit.framework/Headers/UIApplication.h:15: In file included from /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator12.0.sdk/System/Library/Frameworks/UIKit.framework/Headers/UIAlert.h:9: In file included from /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator12.0.sdk/System/Library/Frameworks/UIKit.framework/Headers/UIActionSheet.h:11: In file included from /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator12.0.sdk/System/Library/Frameworks/UIKit.framework/Headers/UITextField.h:12: In file included from /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator12.0.sdk/System/Library/Frameworks/UIKit.framework/Headers/UIControl.h:10: In file included from /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator12.0.sdk/System/Library/Frameworks/UIKit.framework/Headers/UIView.h:10: In file included from /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator12.0.sdk/System/Library/Frameworks/QuartzCore.framework/Headers/QuartzCore.h:9: In file included from /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator12.0.sdk/System/Library/Frameworks/QuartzCore.framework/Headers/CoreAnimation.h:14: In file included from /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator12.0.sdk/System/Library/Frameworks/QuartzCore.framework/Headers/CAAnimation.h:6: /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator12.0.sdk/System/Library/Frameworks/QuartzCore.framework/Headers/CALayer.h:45:12: note: receiver is instance of class declared here @interface CALayer : NSObject <NSSecureCoding, CAMediaTiming> ^ 1 error generated. ** BUILD FAILED **
Jonathan fixed this in r236337.