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      1 // Specific definitions for newlib  -*- C++ -*-
      2 
      3 // Copyright (C) 2000-2022 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 1
     32 
     33 // System-specific #define, typedefs, corrections, etc, go here.  This
     34 // file will come before all others.
     35 
     36 #ifdef __CYGWIN__
     37 #define _GLIBCXX_GTHREAD_USE_WEAK 0
     38 
     39 #if defined (_GLIBCXX_DLL)
     40 #define _GLIBCXX_PSEUDO_VISIBILITY_default __attribute__ ((__dllimport__))
     41 #else
     42 #define _GLIBCXX_PSEUDO_VISIBILITY_default
     43 #endif
     44 #define _GLIBCXX_PSEUDO_VISIBILITY_hidden
     45 
     46 #define _GLIBCXX_PSEUDO_VISIBILITY(V) _GLIBCXX_PSEUDO_VISIBILITY_ ## V
     47 
     48 // See libstdc++/20806.
     49 #define _GLIBCXX_HAVE_DOS_BASED_FILESYSTEM 1
     50 
     51 // Enable use of GetModuleHandleEx (requires Windows XP/2003) in
     52 // __cxa_thread_atexit to prevent modules from being unloaded before
     53 // their dtors are called
     54 #define _GLIBCXX_THREAD_ATEXIT_WIN32 1
     55 
     56 // See libstdc++/69506
     57 #define _GLIBCXX_USE_WEAK_REF 0
     58 
     59 #endif
     60 
     61 #endif
     62