Compilation error

Getting Started
1

/usr/bin/ld: CMakeFiles/sim.dir/src/construction.cc.o: in function MyDetectorConstruction::MyDetectorConstruction()': construction.cc:(.text+0x0): multiple definition of MyDetectorConstruction::MyDetectorConstruction()‘; CMakeFiles/sim.dir/src/MyDetectorConstruction.cc.o:MyDetectorConstruction.cc:(.text+0x0): first defined here
/usr/bin/ld: CMakeFiles/sim.dir/src/construction.cc.o: in function MyDetectorConstruction::DefineMaterial()': construction.cc:(.text+0x884): multiple definition of MyDetectorConstruction::DefineMaterial()’; CMakeFiles/sim.dir/src/MyDetectorConstruction.cc.o:MyDetectorConstruction.cc:(.text+0x116): first defined here
/usr/bin/ld: CMakeFiles/sim.dir/src/construction.cc.o: in function MyDetectorConstruction::MyDetectorConstruction()': construction.cc:(.text+0x0): multiple definition of MyDetectorConstruction::MyDetectorConstruction()‘; CMakeFiles/sim.dir/src/MyDetectorConstruction.cc.o:MyDetectorConstruction.cc:(.text+0x0): first defined here
/usr/bin/ld: CMakeFiles/sim.dir/src/construction.cc.o: in function MyDetectorConstruction::~MyDetectorConstruction()': construction.cc:(.text+0x822): multiple definition of MyDetectorConstruction::~MyDetectorConstruction()’; CMakeFiles/sim.dir/src/MyDetectorConstruction.cc.o:MyDetectorConstruction.cc:(.text+0xb4): first defined here
/usr/bin/ld: CMakeFiles/sim.dir/src/construction.cc.o: in function MyDetectorConstruction::~MyDetectorConstruction()': construction.cc:(.text+0x822): multiple definition of MyDetectorConstruction::~MyDetectorConstruction()‘; CMakeFiles/sim.dir/src/MyDetectorConstruction.cc.o:MyDetectorConstruction.cc:(.text+0xb4): first defined here
/usr/bin/ld: CMakeFiles/sim.dir/src/construction.cc.o: in function MyDetectorConstruction::~MyDetectorConstruction()': construction.cc:(.text+0x854): multiple definition of MyDetectorConstruction::~MyDetectorConstruction()’; CMakeFiles/sim.dir/src/MyDetectorConstruction.cc.o:MyDetectorConstruction.cc:(.text+0xe6): first defined here
/usr/bin/ld: CMakeFiles/sim.dir/src/construction.cc.o: in function MyDetectorConstruction::Construct()': construction.cc:(.text+0x27e0): multiple definition of MyDetectorConstruction::Construct()‘; CMakeFiles/sim.dir/src/MyDetectorConstruction.cc.o:MyDetectorConstruction.cc:(.text+0xbaa): first defined here
/usr/bin/ld: CMakeFiles/sim.dir/src/construction.cc.o: in function MyDetectorConstruction::ConstructSDandField()': construction.cc:(.text+0x2b80): multiple definition of MyDetectorConstruction::ConstructSDandField()’; CMakeFiles/sim.dir/src/MyDetectorConstruction.cc.o:MyDetectorConstruction.cc:(.text+0x1376): first defined here
/usr/bin/ld: CMakeFiles/sim.dir/src/detector.cc.o: in function MySensitiveDetector::~MySensitiveDetector()': detector.cc:(.text+0xa4): multiple definition of MySensitiveDetector::~MySensitiveDetector()‘; CMakeFiles/sim.dir/src/MySensitiveDetector.cc.o:MySensitiveDetector.cc:(.text+0x18a): first defined here
/usr/bin/ld: CMakeFiles/sim.dir/src/detector.cc.o: in function MySensitiveDetector::~MySensitiveDetector()': detector.cc:(.text+0xa4): multiple definition of MySensitiveDetector::~MySensitiveDetector()’; CMakeFiles/sim.dir/src/MySensitiveDetector.cc.o:MySensitiveDetector.cc:(.text+0x18a): first defined here
/usr/bin/ld: CMakeFiles/sim.dir/src/detector.cc.o: in function MySensitiveDetector::~MySensitiveDetector()': detector.cc:(.text+0xd6): multiple definition of MySensitiveDetector::~MySensitiveDetector()‘; CMakeFiles/sim.dir/src/MySensitiveDetector.cc.o:MySensitiveDetector.cc:(.text+0x1ce): first defined here
/usr/bin/ld: CMakeFiles/sim.dir/src/detector.cc.o: in function MySensitiveDetector::ProcessHits(G4Step*, G4TouchableHistory*)': detector.cc:(.text+0x106): multiple definition of MySensitiveDetector::ProcessHits(G4Step*, G4TouchableHistory*)’; CMakeFiles/sim.dir/src/MySensitiveDetector.cc.o:MySensitiveDetector.cc:(.text+0x3ba): first defined here
/usr/bin/ld: CMakeFiles/sim.dir/src/event.cc.o: in function MyEventAction::MyEventAction(MyRunAction*)': event.cc:(.text+0x0): multiple definition of MyEventAction::MyEventAction(MyRunAction*)‘; CMakeFiles/sim.dir/src/MyEventAction.cc.o:MyEventAction.cc:(.text+0x0): first defined here
/usr/bin/ld: CMakeFiles/sim.dir/src/event.cc.o: in function MyEventAction::MyEventAction(MyRunAction*)': event.cc:(.text+0x0): multiple definition of MyEventAction::MyEventAction(MyRunAction*)’; CMakeFiles/sim.dir/src/MyEventAction.cc.o:MyEventAction.cc:(.text+0x0): first defined here
/usr/bin/ld: CMakeFiles/sim.dir/src/event.cc.o: in function MyEventAction::~MyEventAction()': event.cc:(.text+0x36): multiple definition of MyEventAction::~MyEventAction()‘; CMakeFiles/sim.dir/src/MyEventAction.cc.o:MyEventAction.cc:(.text+0x4c): first defined here
/usr/bin/ld: CMakeFiles/sim.dir/src/event.cc.o: in function MyEventAction::~MyEventAction()': event.cc:(.text+0x36): multiple definition of MyEventAction::~MyEventAction()’; CMakeFiles/sim.dir/src/MyEventAction.cc.o:MyEventAction.cc:(.text+0x4c): first defined here
/usr/bin/ld: CMakeFiles/sim.dir/src/event.cc.o: in function MyEventAction::~MyEventAction()': event.cc:(.text+0x68): multiple definition of MyEventAction::~MyEventAction()‘; CMakeFiles/sim.dir/src/MyEventAction.cc.o:MyEventAction.cc:(.text+0x7e): first defined here
/usr/bin/ld: CMakeFiles/sim.dir/src/event.cc.o: in function MyEventAction::BeginOfEventAction(G4Event const*)': event.cc:(.text+0x98): multiple definition of MyEventAction::BeginOfEventAction(G4Event const*)’; CMakeFiles/sim.dir/src/MyEventAction.cc.o:MyEventAction.cc:(.text+0xae): first defined here
/usr/bin/ld: CMakeFiles/sim.dir/src/event.cc.o: in function MyEventAction::EndOfEventAction(G4Event const*)': event.cc:(.text+0xb8): multiple definition of MyEventAction::EndOfEventAction(G4Event const*)‘; CMakeFiles/sim.dir/src/MyEventAction.cc.o:MyEventAction.cc:(.text+0x1aa): first defined here
/usr/bin/ld: CMakeFiles/sim.dir/src/MySensitiveDetector.cc.o:(.data.rel.ro._ZTV19MySensitiveDetector[_ZTV19MySensitiveDetector]+0x28): undefined reference to `MySensitiveDetector::EndOfEvent(G4HCofThisEvent*)’
collect2: error: ld returned 1 exit status
make[2]: *** [CMakeFiles/sim.dir/build.make:339: sim] Error 1
make[1]: *** [CMakeFiles/Makefile2:84: CMakeFiles/sim.dir/all] Error 2
make: *** [Makefile:91: all] Error 2

Everytime I am trying to compile these errors pop up and I can’t seem to find the source of this problem, I figured that this was a linking issue and made the necessary changes in the makefile but I am unaware of the changes I should make in the cmake file in order to compile without any errors popping up.

Please help.

2

I don’t think it’s CMake related, rather, the file construction.cc has a definition of MyDetectorConstruction::MyDetectorConstruction() that is also present in the file MyDetectorConstruction.cc.

Could you post these files and their associated construction.hh, MyDetectorConstruction.hh headers please, along with the CMakeLists.txt?

3

Sure I am attaching those files.
MyDetectorConstruction.cc (2.2 KB)
construction.cc (4.9 KB)
construction.hh (1.3 KB)
CMakeLists.txt (580 Bytes)
MyDetectorConstruction.hh (887 Bytes)

4

So should I delete the portion where I defined the constructor MyDetectorConstruction::MyDetectorConstruction() in construction.cc or should I delete it from MyDetectorConstruction.cc itself?

5

Which one is the file/definition that you want to use? Pick one then delete the other, along with the corresponding .hh file.

6

Okay so you are asking me to delete the constructor from the file where its not important.

7

Effectively yes, but it’s better to just the delete the relevant files directly because it’s the whole class not just the constructor that’s causing the conflict. So decide whether constructor.cc/.hh or MyDetectorConstruction.cc/.hh will define class MyDetectorConstruction, and delete the other pair.

8

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