Modifying G4PSEnergyDeposit3D primitive scorer: error 'Undefined Reference'

Recording, Visualizing and Persisting Data
1

Hi everyone,
I need to detect the kinetic energy of particles passing through a detector. Geant4 provides primitive scorers(PS) as G4PSEnergyDeposit3D, which record the energy deposit but not the kinetic energy of the particle, and I could not find any PS for kinetic energy. So I tried to modify the code of G4PSEnergyDeposit3D(.hh & .cc), by creating header and source files EnergyDepositModified.hh/cc and EnergyDeposit3DModified.hh/cc .
Then as I call call the class EnergyDeposit3DModified to create scorer pointers in the detector construction I get this error : ‘Undefined Reference to EnergyDeposit3DModified::EnergyDeposit3DModified(string, int, int, int)’.
Does any one know why do I get this error?

In addition, whenever I define new header and source files to add a feature to the existing example (e.g. B1) I get the same error ‘Undefined Reference’ to that class.

I would appreciate any suggestion for how to record the kinetic energy.
Thanks to all

2

Hi, the most likely source of the undefined references you are describing is that you are not actually compiling the .cc files – thus your code sees the declaration of the functions/variables in the header file via the include but the definitions are absent during the linking phase. If you are using a similar setup to your code as all the examples, make sure your header files (.hh) are all in include/ folder and not in a subfolder and make sure all the source files (.cc) are in the src/ directory and not in a subfolder. Once this is assured, re-run cmake from your build directory to ensure CMake updates the Makefiles to include the new cc files and then just run make again

3

Thanks so much for your response. That was indeed the issue. I needed to re-run CMake to include the source files.