Set-up environment

- Geant4 need properly set environment variables:
G4SYSTEM – operating system (e.g. Linux-g++)
G4INSTALL – base directory of Geant4
G4WORKDIR – where you run your application
CLHEP_BASE_DIR – location of the compiled CLHEP libraries (optional)

Variables for physics processes:
G4ABLADATA="/usr/local/geant4/geant4.10.04‐install/share/Geant4‐10.4.0/data/G4ABLA3.0"
G4ENSDFSTATEDATA="/usr/local/geant4/geant4.10.04‐install/share/Geant4‐10.4.0/data/G4ENSDFSTATE2.1"
G4LEDATA="/usr/local/geant4/geant4.10.04‐install/share/Geant4‐10.4.0/data/G4EMLOW6.50"
G4LEVELGAMMADATA="/usr/local/geant4/geant4.10.04‐install/share/Geant4‐10.4.0/data/PhotonEvaporation4.3.2"
G4NEUTRONHPDATA="/usr/local/geant4/geant4.10.04‐install/share/Geant4‐10.4.0/data/G4NDL4.5"
G4NEUTRONXSDATA="/usr/local/geant4/geant4.10.04‐install/share/Geant4‐10.4.0/data/G4NEUTRONXS1.4"
G4PIIDATA="/usr/local/geant4/geant4.10.04‐install/share/Geant4‐10.4.0/data/G4PII1.3"
G4RADIOACTIVEDATA="/usr/local/geant4/geant4.10.04‐install/share/Geant4‐10.4.0/data/RadioactiveDecay5.1.1"
G4REALSURFACEDATA="/usr/local/geant4/geant4.10.04‐install/share/Geant4‐10.4.0/data/RealSurface1.0"
G4SAIDXSDATA="/usr/local/geant4/geant4.10.04‐install/share/Geant4‐10.4.0/data/G4SAIDDATA1.1"
LD_LIBRARY_PATH="...:/usr/local/geant4/geant4.10.04‐install/lib64"
PATH="...:/usr/local/geant4/geant4.10.04‐install/bin"

Additional variables for GUI, Visualization, Analysis


- To set them up properly in your shell, run the script in Geant4 installation directory:
source /usr/local/geant4/geant4.10.04‐install/share/Geant4‐10.4.0/geant4make/geant4make.sh

- You can put this line your ~/.bashrc file (or similar for other shells)