Edit

[EDIT] FILE: utsname.h

/* Copyright (C) 1995-2018 Free Software Foundation, Inc.
   This file is part of the GNU C Library.

The GNU C Library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Lesser General Public
   License as published by the Free Software Foundation; either
   version 2.1 of the License, or (at your option) any later version.

The GNU C Library is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public
   License along with the GNU C Library; if not, see
   <http://www.gnu.org/licenses/>.  */

#ifndef _SYS_UTSNAME_H
# error "Never include <bits/utsname.h> directly; use <sys/utsname.h> instead."
#endif

/* Length of the entries in `struct utsname' is 65.  */
#define _UTSNAME_LENGTH 65

/* Linux provides as additional information in the `struct utsname'
   the name of the current domain.  Define _UTSNAME_DOMAIN_LENGTH
   to a value != 0 to activate this entry.  */
#define _UTSNAME_DOMAIN_LENGTH _UTSNAME_LENGTH

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