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os_defines.h

// Specific definitions for GNU/Linux  -*- C++ -*-

// Copyright (C) 2000-2018 Free Software Foundation, Inc.
//
// This file is part of the GNU ISO C++ Library.  This library is free
// software; you can redistribute it and/or modify it under the
// terms of the GNU General Public License as published by the
// Free Software Foundation; either version 3, or (at your option)
// any later version.

// This 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 General Public License for more details.

// Under Section 7 of GPL version 3, you are granted additional
// permissions described in the GCC Runtime Library Exception, version
// 3.1, as published by the Free Software Foundation.

// You should have received a copy of the GNU General Public License and
// a copy of the GCC Runtime Library Exception along with this program;
// see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
// <http://www.gnu.org/licenses/>.

/** @file bits/os_defines.h
 *  This is an internal header file, included by other library headers.
 *  Do not attempt to use it directly. @headername{iosfwd}
 */

#ifndef _GLIBCXX_OS_DEFINES
#define _GLIBCXX_OS_DEFINES 1

// System-specific #define, typedefs, corrections, etc, go here.  This
// file will come before all others.

// This keeps isanum, et al from being propagated as macros.
#define __NO_CTYPE 1

#include <features.h>

// Provide a declaration for the possibly deprecated gets function, as
// glibc 2.15 and later does not declare gets for ISO C11 when
// __GNU_SOURCE is defined.
#if __GLIBC_PREREQ(2,15) && defined(_GNU_SOURCE)
# undef _GLIBCXX_HAVE_GETS
#endif

// Glibc 2.23 removed the obsolete isinf and isnan declarations. Check the
// version dynamically in case it has changed since libstdc++ was configured.
#define _GLIBCXX_NO_OBSOLETE_ISINF_ISNAN_DYNAMIC __GLIBC_PREREQ(2,23)

#endif

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