def _cppstd_mcst_lcc(mcst_lcc_version, cppstd):
    v11 = vgnu11 = v14 = vgnu14 = v17 = vgnu17 = v20 = vgnu20 = None

    if Version(mcst_lcc_version) >= "1.21":
        v11 = "c++11"