can't build qtwebview on macOS 10.9

Module "qt/qtwebview" (b2586ea54a8ae13169908e3dc8a85d21e0eb2f14) did not compile:
 In file included from qwebview_osx.mm:38:
 ./qwebview_osx_p.h:59:30: error: Objective-C declarations may only appear in global scope
 /Users/qt/work/install/lib/QtCore.framework/Headers/qglobal.h:543:60: note: expanded from macro 'Q_FORWARD_DECLARE_OBJC_CLASS'
 In file included from qwebview_darwin.mm:37:
 ./qwebview_darwin_p.h:71:30: error: Objective-C declarations may only appear in global scope
 /Users/qt/work/install/lib/QtCore.framework/Headers/qglobal.h:543:60: note: expanded from macro 'Q_FORWARD_DECLARE_OBJC_CLASS'
 qwebview_osx.mm:59:12: error: Objective-C declarations may only appear in global scope
 qwebview_osx.mm:72:17: error: Objective-C declarations may only appear in global scope
 In file included from qwebview_darwin.mm:63:
 ./qwebview_osx_p.h:59:30: error: Objective-C declarations may only appear in global scope
 /Users/qt/work/install/lib/QtCore.framework/Headers/qglobal.h:543:60: note: expanded from macro 'Q_FORWARD_DECLARE_OBJC_CLASS'
 qwebview_osx.mm:76:5: error: use of undeclared identifier 'qtWebViewPrivate'; did you mean 'webViewPrivate'?
 qwebview_osx.mm:74:72: note: 'webViewPrivate' declared here
 qwebview_darwin.mm:159:12: error: Objective-C declarations may only appear in global scope
 qwebview_darwin.mm:172:17: error: Objective-C declarations may only appear in global scope
 qwebview_osx.mm:82:12: error: unknown type name 'qtWebViewPrivate'; did you mean 'WebViewPrivate'?
 /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.10.sdk/System/Library/Frameworks/WebKit.framework/Headers/WebView.h:47:8: note: 'WebViewPrivate' declared here
 qwebview_osx.mm:82:28: error: cannot use arrow operator on a type
 qwebview_darwin.mm:177:9: error: use of undeclared identifier 'qDarwinWebViewPrivate'; did you mean 'webViewPrivate'?
 qwebview_darwin.mm:173:76: note: 'webViewPrivate' declared here
 qwebview_osx.mm:83:12: error: unknown type name 'qtWebViewPrivate'; did you mean 'WebViewPrivate'?
 /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.10.sdk/System/Library/Frameworks/WebKit.framework/Headers/WebView.h:47:8: note: 'WebViewPrivate' declared here
 qwebview_osx.mm:83:28: error: cannot use arrow operator on a type
 qwebview_darwin.mm:184:12: error: use of undeclared identifier 'qDarwinWebViewPrivate'
 qwebview_osx.mm:94:11: error: use of undeclared identifier 'qtWebViewPrivate'; did you mean 'WebViewPrivate'?
 /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.10.sdk/System/Library/Frameworks/WebKit.framework/Headers/WebView.h:47:8: note: 'WebViewPrivate' declared here
 qwebview_osx.mm:95:16: error: unknown type name 'qtWebViewPrivate'; did you mean 'WebViewPrivate'?
 /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.10.sdk/System/Library/Frameworks/WebKit.framework/Headers/WebView.h:47:8: note: 'WebViewPrivate' declared here
 qwebview_osx.mm:95:32: error: cannot use arrow operator on a type
 qwebview_darwin.mm:184:55: error: use of undeclared identifier 'qDarwinWebViewPrivate'
 qwebview_osx.mm:111:11: error: use of undeclared identifier 'qtWebViewPrivate'; did you mean 'WebViewPrivate'?
 /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.10.sdk/System/Library/Frameworks/WebKit.framework/Headers/WebView.h:47:8: note: 'WebViewPrivate' declared here
 qwebview_darwin.mm:185:12: error: use of undeclared identifier 'qDarwinWebViewPrivate'
 qwebview_osx.mm:113:16: error: unknown type name 'qtWebViewPrivate'; did you mean 'WebViewPrivate'?
 /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.10.sdk/System/Library/Frameworks/WebKit.framework/Headers/WebView.h:47:8: note: 'WebViewPrivate' declared here
 qwebview_osx.mm:113:32: error: cannot use arrow operator on a type
 qwebview_osx.mm:124:11: error: use of undeclared identifier 'qtWebViewPrivate'; did you mean 'WebViewPrivate'?
 /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.10.sdk/System/Library/Frameworks/WebKit.framework/Headers/WebView.h:47:8: note: 'WebViewPrivate' declared here
 qwebview_darwin.mm:185:48: error: use of undeclared identifier 'qDarwinWebViewPrivate'
 qwebview_osx.mm:127:16: error: unknown type name 'qtWebViewPrivate'; did you mean 'WebViewPrivate'?
 /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.10.sdk/System/Library/Frameworks/WebKit.framework/Headers/WebView.h:47:8: note: 'WebViewPrivate' declared here
 qwebview_osx.mm:127:32: error: cannot use arrow operator on a type
 qwebview_darwin.mm:195:11: error: use of undeclared identifier 'qDarwinWebViewPrivate'
 make[2]: *** [.obj/qwebview_osx.o] Error 1
 qwebview_darwin.mm:196:16: error: use of undeclared identifier 'qDarwinWebViewPrivate'
 qwebview_darwin.mm:197:48: error: use of undeclared identifier 'qDarwinWebViewPrivate'
 qwebview_darwin.mm:202:12: error: use of undeclared identifier 'qDarwinWebViewPrivate'
 qwebview_darwin.mm:202:55: error: use of undeclared identifier 'qDarwinWebViewPrivate'
 qwebview_darwin.mm:209:11: error: use of undeclared identifier 'qDarwinWebViewPrivate'
 qwebview_darwin.mm:211:16: error: use of undeclared identifier 'qDarwinWebViewPrivate'
 qwebview_darwin.mm:212:48: error: use of undeclared identifier 'qDarwinWebViewPrivate'
 qwebview_darwin.mm:223:11: error: use of undeclared identifier 'qDarwinWebViewPrivate'
 qwebview_darwin.mm:226:16: error: use of undeclared identifier 'qDarwinWebViewPrivate'
 make[2]: *** [.obj/qwebview_darwin.o] Error 1
 make[1]: *** [sub-webview-make_first] Error 2
 make: *** [sub-src-make_first] Error 2