def METHOD_NAME(self):
    """Add I_MPI_XXX variables to set."""
    if self.comp_family() == toolchain.INTELCOMP:
        self.MPI_COMPILER_MPICC = 'mpiicc'
        self.MPI_COMPILER_MPICXX = 'mpiicpc'
        self.MPI_COMPILER_MPIF77 = 'mpiifort'
        self.MPI_COMPILER_MPIF90 = 'mpiifort'
        self.MPI_COMPILER_MPIFC = 'mpiifort'
    # this needs to be done first, otherwise e.g., CC is set to MPICC if the usempi toolchain option is enabled
    for var, _ in COMPILER_VARIABLES:
        self.variables.nappend('I_MPI_%s' % var, str(self.variables[var].get_first()), var_class=CommandFlagList)
    super(IntelMPI, self).METHOD_NAME()