register_flag_optional(CMAKE_CXX_COMPILER
        "Any CXX compiler that is supported by CMake detection and supports C++20 Ranges"
        "c++")

macro(setup)

    # TODO this needs to eventually be removed when CMake adds proper C++20 support or at least update the flag used here

    # C++ 2a is too new, disable CMake's std flags completely:
    set(CMAKE_CXX_EXTENSIONS OFF)
    set(CMAKE_CXX_STANDARD_REQUIRED OFF)
    # and append our own:
    register_append_cxx_flags(ANY -std=c++2a)
endmacro()