Undefined reference to `MySensitiveDetector::MySensitiveDetector(G4String)'

Geometry, Fields and Transportation
1

Hello, I am a beginner trying to learn Geant4.
I have the following error, don’t quite understand why. Can someone please help?

/usr/bin/ld: CMakeFiles/sim.dir/construction.cc.o: in function MyDetectorConstruction::ConstructSDandField()': construction.cc:(.text+0x1307): undefined reference to MySensitiveDetector::MySensitiveDetector(G4String)’
collect2: error: ld returned 1 exit status
make[2]: *** [CMakeFiles/sim.dir/build.make:189: sim] Error 1
make[1]: *** [CMakeFiles/Makefile2:104: CMakeFiles/sim.dir/all] Error 2
make: *** [Makefile:84: all] Error 2

Relevant part of code in contruction.cc

void MyDetectorConstruction::ConstructSDandField()
{
  MySensitiveDetector *sensDet = new MySensitiveDetector("SensitiveDetector");
  
  
  logicDetector->SetSensitiveDetector(sensDet);


}

Here is the header file contruction.hh:

#ifndef CONSTRUCTION_HH
#define CONSTRUCTION_HH
#include "G4SystemOfUnits.hh"
#include "G4VUserDetectorConstruction.hh"
#include "G4VPhysicalVolume.hh"
#include "G4LogicalVolume.hh"
#include "G4Box.hh"
#include "G4PVPlacement.hh"
#include "G4NistManager.hh"

#include "detector.hh"

class MyDetectorConstruction : public G4VUserDetectorConstruction
{
  
public:
    MyDetectorConstruction();
    ~MyDetectorConstruction();
    
    virtual G4VPhysicalVolume *Construct();
    
private:
    G4LogicalVolume *logicDetector;
    virtual void ConstructSDandField();


};

#endif
2

I can recommend the references for introductory material on c++ in this post:

seems you are missing a

public:
    MyDetectorConstruction(G4String);

entry (plus maybe implementation).

1 Like