From Stephan Huber, "CLang / LLVM on OS X seems to have a problem compiling the osgGA-serializer. (It was reported before on the list, but the error is hard to track as it shows up only sometimes)

I fixed the compile-error with a dedicated destructor of osgGA::GUIEventHandler"

include/osgGA/GUIEventHandler

@@ -122,6 +122,10 @@ public:
 protected:
         unsigned int _ignoreHandledEventsMask;
 #endif
+
+protected: 
+        virtual ~GUIEventHandler();
+
 };
 
 }