Older Root Package

[Wile_E_Coyote]

Your “CMakelists.txt” file does not use ROOT at all:

• ROOT Manual → Basics → Integrating ROOT into CMake projects

• How to Integrate ROOT into my project with CMake

• Some Geant4 examples use ROOT, so you can look there.

• An additional example: GitHub - eguiraud/root-readspeed: A tool to measure what throughput can be expected from ROOT for a given application

BTW. You need to have ROOT and Geant4 built so that they all use the same C++ standard (i.e., C++11 or C++14 or C++17): ROOT Forum → Search → Geant4 C++ standard