libstdc++-v3/config/os/vxworks/os_defines.h

   1 // Specific definitions for VxWorks  -*- 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 1
  32
  33 // System-specific #define, typedefs, corrections, etc, go here.  This
  34 // file will come before all others.
  35
  36 // The system environment we can rely on varies across VxWorks
  37 // versions.
  38 #include <_vxworks-versions.h>
  39
  40 // Weak refs are supported starting with VxWorks 7, in RTP mode only
  41
  42 #if _VXWORKS_MAJOR_GE(7) && defined(__RTP__)
  43 #define _GLIBCXX_USE_WEAK_REF 1
  44 #else
  45 #define _GLIBCXX_USE_WEAK_REF 0
  46 #endif
  47
  48 // We support TLS on VxWorks >= 6.6 (either directly or with emutls)
  49 #if !_VXWORKS_PRE(6, 6)
  50 #define _GLIBCXX_HAVE_TLS 1
  51 #endif
  52
  53 // VxWorks7 comes with a DinkumWare library and the system headers which we
  54 // are going to include for libstdc++ have a few related intrinsic
  55 // assumptions.  We control our own configuration here to best integrate with
  56 // this environment: use C99 math headers, do not use the FP macros for
  57 // dynamic cast by default (overriden for RTPs below) and arrange to disable
  58 // the system TR1 declarations as we'll provide ours.
  59
  60 #if _VXWORKS_MAJOR_GE(7)
  61
  62 #define _GLIBCXX_USE_C99_MATH 1
  63 #define _GLIBCXX_USE_C99_FP_MACROS_DYNAMIC 0
  64
  65 #undef _HAS_TR1_DECLARATIONS
  66 #define _HAS_TR1_DECLARATIONS 0
  67
  68 #else  // VXWORKS_MAJOR < 7
  69
  70 // For RTPs, use the VxWorks headers as a basis, from which we can use
  71 // C99 dynamic FP macros and expect (after fixincludes) accurate c++11
  72 // prototypes for FP.
  73
  74 #ifdef __RTP__
  75
  76 #define _GLIBCXX_INCLUDE_NEXT_C_HEADERS 1
  77
  78 #undef _GLIBCXX_USE_C99_FP_MACROS_DYNAMIC
  79 #define _GLIBCXX_USE_C99_FP_MACROS_DYNAMIC 1
  80
  81 #define __CORRECT_ISO_CPP11_MATH_H_PROTO_FP
  82
  83 #else // !__RTP__
  84
  85 // libstdc++ will include system headers and vxWorks.h ought to have
  86 // been included ahead for VxWorks kernel modules prior to VxWorks 7
  87 #include <vxWorks.h>
  88
  89 #endif // __RTP__
  90
  91 #endif // _VXWORKS_MAJOR >= 7
  92
  93 // The min/max "functions" may be refered to with a namespace prefix.
  94 // Prevent possible redefinitions as macros from VxWorks headers.
  95 #undef NOMINMAX
  96 #define NOMINMAX 1
  97
  98 // Do not include the inline definitions from VxWorks headers, as we'll
  99 // want to use the ones from libstdc++ instead.
 100 #undef _NO_CPP_INLINES
 101 #define _NO_CPP_INLINES 1
 102
 103 #endif // _GLIBCXX_OS_DEFINES