Set CMAKE_CXX_STANDARD before find_package(DD4hep)
Set CMAKE_CXX_STANDARD before find_package(DD4hep) This is needed due as the find_package(DD4hep) fails if this is not set
Set CMAKE_CXX_STANDARD before find_package(DD4hep) This is needed due as the find_package(DD4hep) fails if this is not set