I need to capture emited signals from a QProcess for testing purposes.

Qt was created with the idea of removing this boilerplate code and providing a nice and clean syntax, and the signal and slots mechanism is the answer. Signals and slots Instead of having observable objects and observers, and registering them, Qt provides two high level concepts: signals and slots. Qt - undefined reference to `vtable for myObj' in qt console application - signals and slots This topic has been deleted. Only users with topic management privileges can see it.

Signals and slots are loosely coupled: A class which emits a signal neither knows nor cares which slots receive the signal. Qt’s signals and slots mechanism ensures that if you connect a signal to a slot, the slot will be called with the signal’s parameters at the right time. Qt slots are statically defined as part of a C class. They are referenced using the QtCore.SLOT function. This method takes a single string argument that is the name of the slot and its C signature. No a signal call is purely 1 way as more than 1 slot may be connected to a signal (and vice versa) you can either make it a true function call where you can do pass by reference. Or create a signal-slot connection in the opposite direction as a callback.

Since I am using a console application, I resolved to create a class in my main.cpp file called myObj using mainly this example:

Problem:

Qt Signal Slot Pass Reference

main.cpp:72: error: undefined reference to `vtable for myObj'

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main.cpp:81: error: undefined reference to `vtable for myObj'

I have looked at a number of SO pages e.g here and here and here and various others, yet had not found a solution

https://evertrading.amebaownd.com/posts/18867427. I have tried/done:

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added the Q_Object Macro
ran qmake
rebuilt
checked the #include

.pro file

Qt Signals And Slots Reference List

Any suggestions?