def p_host_identifier_option_decls(p):
    """ host_identifier_option_decls : HOST_IDENTIFIER option_decl
                                     | HOST_IDENTIFIER option_decl host_identifier_option_decls
    """
    p[0] = {p[1]: p[2]}
    if len(p) > 3:
        p[0][p[1]].update(p[3][p[1]])
