Why am I getting a 'undefined reference to vtable for BarelySocket' linker error?

Undefined Reference to Vtable for BarelySocket

The linker error "undefined reference to vtable for BarelySocket" indicates a missing implementation of a virtual method in the class definition. However, in the provided code, there are no virtual methods declared in the BarelySocket class.

To resolve this error, one must consider the following:

• Q_OBJECT Macro: When declaring a class with Qt's Q_OBJECT macro, it is essential to run qmake after modifying the class definition. This process generates the necessary meta-objects and updates the vtable references.
• Private Variables: In the provided code, the reciveMessages vector is declared as private. However, it is not used within any of the class methods. If this vector is not being used, it can be removed from the class declaration.
• Data Types: The error message mentions that the Message struct is complex. Ensure that the Message data type is defined correctly and all necessary headers are included.

If these steps do not resolve the error, it is advisable to double-check the entire class declaration and ensure that there are no missing virtual methods or incorrect data types.

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