case _SC_CHARCLASS_NAME_MAX:
DEFUN(__sysconf, (name), int name){  switch (name)    {    default:      errno = EINVAL;      return -1;    case _SC_TZNAME_MAX:      return __tzname_max ();    case _SC_ARG_MAX:    case _SC_CHILD_MAX:    case _SC_CLK_TCK:    case _SC_NGROUPS_MAX:    case _SC_OPEN_MAX:    case _SC_JOB_CONTROL:    case _SC_SAVED_IDS:    case _SC_VERSION:    case _SC_BC_BASE_MAX:    case _SC_BC_DIM_MAX:    case _SC_BC_SCALE_MAX:    case _SC_BC_STRING_MAX:    case _SC_EQUIV_CLASS_MAX:    case _SC_EXPR_NEST_MAX:    case _SC_LINE_MAX:    case _SC_RE_DUP_MAX:    case _SC_2_VERSION:    case _SC_2_C_BIND:    case _SC_2_C_DEV:    case _SC_2_FORT_DEV:    case _SC_2_SW_DEV:      break;    }  errno = ENOSYS;  return -1;}