Problem Installing Garfield

[hschindl]

Hi,
you need to make sure that ROOT, Geant4 and Garfield++ are compiled using the same C++ standard:

Problem in installation

You can build a c++14 aware Geant4 using: cmake -DGEANT4_BUILD_CXXSTD=14 ... If you want to have everything using c++17, you need to build ROOT using “cmake -DCMAKE_CXX_STANDARD=17” and Geant4 using “cmake -DGEANT4_BUILD_CXXSTD=17” Note that, afterward, in any case, you also need to build Garfield++ with the same C++ standard (I guess @hschindl can tell you how).