✏ EDIT: libc-version.h

/* Interface to GNU libc specific functions for version information.
   Copyright (C) 1998-2018 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 _GNU_LIBC_VERSION_H
#define	_GNU_LIBC_VERSION_H	1

#include <features.h>

__BEGIN_DECLS

/* Return string describing release status of currently running GNU libc.  */
extern const char *gnu_get_libc_release (void) __THROW;

/* Return string describing version of currently running GNU libc.  */
extern const char *gnu_get_libc_version (void) __THROW;

__END_DECLS

#endif	/* gnu/libc-version.h */

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