1  // Specific definitions for generic platforms  -*- C++ -*-
       2  
       3  // Copyright (C) 2000-2023 Free Software Foundation, Inc.
       4  //
       5  // This file is part of the GNU ISO C++ Library.  This library is free
       6  // software; you can redistribute it and/or modify it under the
       7  // terms of the GNU General Public License as published by the
       8  // Free Software Foundation; either version 3, or (at your option)
       9  // any later version.
      10  
      11  // This library is distributed in the hope that it will be useful,
      12  // but WITHOUT ANY WARRANTY; without even the implied warranty of
      13  // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
      14  // GNU General Public License for more details.
      15  
      16  // Under Section 7 of GPL version 3, you are granted additional
      17  // permissions described in the GCC Runtime Library Exception, version
      18  // 3.1, as published by the Free Software Foundation.
      19  
      20  // You should have received a copy of the GNU General Public License and
      21  // a copy of the GCC Runtime Library Exception along with this program;
      22  // see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
      23  // <http://www.gnu.org/licenses/>.
      24  
      25  /** @file bits/os_defines.h
      26   *  This is an internal header file, included by other library headers.
      27   *  Do not attempt to use it directly. @headername{iosfwd}
      28   */
      29  
      30  #ifndef _GLIBCXX_OS_DEFINES
      31  #  define _GLIBCXX_OS_DEFINES
      32  
      33  // System-specific #define, typedefs, corrections, etc, go here.  This
      34  // file will come before all others.
      35  
      36  //  Define as 0, if you want, to enable inlining of gthread functions.
      37  //  By default, don't pollute libstdc++ with win32api names.
      38  #if !defined (__GTHREAD_HIDE_WIN32API)
      39  # define __GTHREAD_HIDE_WIN32API 1
      40  #endif
      41  
      42  // Don't let win32api windef.h define min and max as macros
      43  // if included after c++config.h.
      44  #undef NOMINMAX
      45  #define NOMINMAX 1
      46  
      47  // Make sure that POSIX printf/scanf functions are activated.  As
      48  // libstdc++ depends on POSIX-definitions of those functions, we define
      49  // it unconditionally.
      50  #undef __USE_MINGW_ANSI_STDIO
      51  #define __USE_MINGW_ANSI_STDIO 1
      52  
      53  #if defined (_GLIBCXX_DLL)
      54  #define _GLIBCXX_PSEUDO_VISIBILITY_default __attribute__ ((__dllimport__))
      55  #else
      56  #define _GLIBCXX_PSEUDO_VISIBILITY_default
      57  #endif
      58  #define _GLIBCXX_PSEUDO_VISIBILITY_hidden
      59  
      60  #define _GLIBCXX_PSEUDO_VISIBILITY(V) _GLIBCXX_PSEUDO_VISIBILITY_ ## V
      61  
      62  // See libstdc++/20806.
      63  #define _GLIBCXX_HAVE_DOS_BASED_FILESYSTEM 1
      64  
      65  // See libstdc++/43738
      66  // On native windows targets there is no ioctl function. And the existing
      67  // ioctlsocket function doesn't work for normal file-descriptors.
      68  #define _GLIBCXX_NO_IOCTL 1
      69  
      70  // See libstdc++/51135
      71  // Class constructors/destructors have __thiscall calling-convention on
      72  // IA 32-bit
      73  #if defined (__i386__)
      74  #define _GLIBCXX_CDTOR_CALLABI __thiscall
      75  #endif
      76  
      77  #ifdef __x86_64__
      78  #define _GLIBCXX_LLP64 1
      79  // See libstdc++/69506
      80  #define _GLIBCXX_USE_WEAK_REF 0
      81  #endif
      82  
      83  // Enable use of GetModuleHandleEx (requires Windows XP/2003) in
      84  // __cxa_thread_atexit to prevent modules from being unloaded before
      85  // their dtors are called
      86  #define _GLIBCXX_THREAD_ATEXIT_WIN32 1
      87  
      88  // Enable use of GetSystemInfo to implement get_nprocs
      89  #define _GLIBCXX_USE_GET_NPROCS_WIN32 1
      90  
      91  // See libstdc++/59807
      92  #define _GTHREAD_USE_MUTEX_INIT_FUNC 1
      93  
      94  #define _GLIBCXX_USE_CRT_RAND_S 1
      95  
      96  // See libstdc++/94268
      97  #define _GLIBCXX_BUFSIZ 4096
      98  
      99  #endif