Answers for "undefined reference to vtable qt"

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undefined reference to vtable qt

Since QWidget has a virtual destructor, the compiler needs a vtable for your class. But your class doesn't have any virtual functions, so it didn't build one for your Communicate class.

Add a virtual ~Communicate() {}; to your class, and all will be well.

Yes, it took me some time to figure this out too!

Posted by: Guest on July-31-2020

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