libstdc++-v3/include/bits/c++config

   1 // Predefined symbols and macros -*- C++ -*-
   2
   3 // Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005,
   4 // 2006, 2007, 2008, 2009 Free Software Foundation, Inc.
   5 //
   6 // This file is part of the GNU ISO C++ Library.  This library is free
   7 // software; you can redistribute it and/or modify it under the
   8 // terms of the GNU General Public License as published by the
   9 // Free Software Foundation; either version 3, or (at your option)
  10 // any later version.
  11
  12 // This library is distributed in the hope that it will be useful,
  13 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 // GNU General Public License for more details.
  16
  17 // Under Section 7 of GPL version 3, you are granted additional
  18 // permissions described in the GCC Runtime Library Exception, version
  19 // 3.1, as published by the Free Software Foundation.
  20
  21 // You should have received a copy of the GNU General Public License and
  22 // a copy of the GCC Runtime Library Exception along with this program;
  23 // see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
  24 // <http://www.gnu.org/licenses/>.
  25
  26 /** @file c++config.h
  27  *  This is an internal header file, included by other library headers.
  28  *  You should not attempt to use it directly.
  29  */
  30
  31 #ifndef _GLIBCXX_CXX_CONFIG_H
  32 #define _GLIBCXX_CXX_CONFIG_H 1
  33
  34 // The current version of the C++ library in compressed ISO date format.
  35 #define __GLIBCXX__
  36
  37 // Macros for visibility.
  38 // _GLIBCXX_HAVE_ATTRIBUTE_VISIBILITY
  39 // _GLIBCXX_VISIBILITY_ATTR
  40 #define _GLIBCXX_HAVE_ATTRIBUTE_VISIBILITY
  41
  42 #if _GLIBCXX_HAVE_ATTRIBUTE_VISIBILITY
  43 # define _GLIBCXX_VISIBILITY_ATTR(V) __attribute__ ((__visibility__ (#V)))
  44 #else
  45 # define _GLIBCXX_VISIBILITY_ATTR(V)
  46 #endif
  47
  48 // Macros for deprecated.
  49 // _GLIBCXX_DEPRECATED
  50 // _GLIBCXX_DEPRECATED_ATTR
  51 #ifndef _GLIBCXX_DEPRECATED
  52 # define _GLIBCXX_DEPRECATED 1
  53 #endif
  54
  55 #if defined(__DEPRECATED) && defined(__GXX_EXPERIMENTAL_CXX0X__)
  56 # define _GLIBCXX_DEPRECATED_ATTR __attribute__ ((__deprecated__))
  57 #else
  58 # define _GLIBCXX_DEPRECATED_ATTR
  59 #endif
  60
  61 // Macros for activating various namespace association modes.
  62 // _GLIBCXX_NAMESPACE_ASSOCIATION_DEBUG
  63 // _GLIBCXX_NAMESPACE_ASSOCIATION_PARALLEL
  64 // _GLIBCXX_NAMESPACE_ASSOCIATION_VERSION
  65
  66 // Guide to libstdc++ namespaces.
  67 /*
  68   namespace std
  69   {
  70     namespace __debug { }
  71     namespace __parallel { }
  72     namespace __norm { } // __normative, __shadow, __replaced
  73     namespace __cxx1998 { }
  74
  75     namespace tr1 { }
  76   }
  77 */
  78 #if __cplusplus
  79
  80 #ifdef _GLIBCXX_DEBUG
  81 # define _GLIBCXX_NAMESPACE_ASSOCIATION_DEBUG 1
  82 #endif
  83
  84 #ifdef _GLIBCXX_PARALLEL
  85 # define _GLIBCXX_NAMESPACE_ASSOCIATION_PARALLEL 1
  86 #endif
  87
  88 #define _GLIBCXX_NAMESPACE_ASSOCIATION_VERSION
  89
  90 // Defined if any namespace association modes are active.
  91 #if _GLIBCXX_NAMESPACE_ASSOCIATION_DEBUG \
  92   || _GLIBCXX_NAMESPACE_ASSOCIATION_PARALLEL \
  93   || _GLIBCXX_NAMESPACE_ASSOCIATION_VERSION
  94 # define _GLIBCXX_USE_NAMESPACE_ASSOCIATION 1
  95 #endif
  96
  97 // Macros for namespace scope. Either namespace std:: or the name
  98 // of some nested namespace within it.
  99 // _GLIBCXX_STD
 100 // _GLIBCXX_STD_D
 101 // _GLIBCXX_STD_P
 102 //
 103 // Macros for enclosing namespaces and possibly nested namespaces.
 104 // _GLIBCXX_BEGIN_NAMESPACE
 105 // _GLIBCXX_END_NAMESPACE
 106 // _GLIBCXX_BEGIN_NESTED_NAMESPACE
 107 // _GLIBCXX_END_NESTED_NAMESPACE
 108 #ifndef _GLIBCXX_USE_NAMESPACE_ASSOCIATION
 109 # define _GLIBCXX_STD_D _GLIBCXX_STD
 110 # define _GLIBCXX_STD_P _GLIBCXX_STD
 111 # define _GLIBCXX_STD std
 112 # define _GLIBCXX_BEGIN_NESTED_NAMESPACE(X, Y) _GLIBCXX_BEGIN_NAMESPACE(X)
 113 # define _GLIBCXX_END_NESTED_NAMESPACE _GLIBCXX_END_NAMESPACE
 114 # define _GLIBCXX_BEGIN_NAMESPACE(X) namespace X _GLIBCXX_VISIBILITY_ATTR(default) {
 115 # define _GLIBCXX_END_NAMESPACE }
 116 #else
 117
 118 # if _GLIBCXX_NAMESPACE_ASSOCIATION_VERSION // && not anything else
 119 #  define _GLIBCXX_STD_D _GLIBCXX_STD
 120 #  define _GLIBCXX_STD_P _GLIBCXX_STD
 121 #  define _GLIBCXX_STD _6
 122 #  define _GLIBCXX_BEGIN_NAMESPACE(X) _GLIBCXX_BEGIN_NESTED_NAMESPACE(X, _6)
 123 #  define _GLIBCXX_END_NAMESPACE _GLIBCXX_END_NESTED_NAMESPACE
 124 # endif
 125
 126 //  debug
 127 # if _GLIBCXX_NAMESPACE_ASSOCIATION_DEBUG && !_GLIBCXX_NAMESPACE_ASSOCIATION_PARALLEL
 128 #  define _GLIBCXX_STD_D __norm
 129 #  define _GLIBCXX_STD_P _GLIBCXX_STD
 130 #  define _GLIBCXX_STD __cxx1998
 131 #  define _GLIBCXX_BEGIN_NAMESPACE(X) namespace X _GLIBCXX_VISIBILITY_ATTR(default) {
 132 #  define _GLIBCXX_END_NAMESPACE }
 133 #  define _GLIBCXX_EXTERN_TEMPLATE -1
 134 # endif
 135
 136 // parallel
 137 # if _GLIBCXX_NAMESPACE_ASSOCIATION_PARALLEL && !_GLIBCXX_NAMESPACE_ASSOCIATION_DEBUG
 138 #  define _GLIBCXX_STD_D _GLIBCXX_STD
 139 #  define _GLIBCXX_STD_P __norm
 140 #  define _GLIBCXX_STD __cxx1998
 141 #  define _GLIBCXX_BEGIN_NAMESPACE(X) namespace X _GLIBCXX_VISIBILITY_ATTR(default) {
 142 #  define _GLIBCXX_END_NAMESPACE }
 143 #  define _GLIBCXX_EXTERN_TEMPLATE -1
 144 # endif
 145
 146 // debug + parallel
 147 # if _GLIBCXX_NAMESPACE_ASSOCIATION_PARALLEL && _GLIBCXX_NAMESPACE_ASSOCIATION_DEBUG
 148 #  define _GLIBCXX_STD_D __norm
 149 #  define _GLIBCXX_STD_P __norm
 150 #  define _GLIBCXX_STD __cxx1998
 151 #  define _GLIBCXX_BEGIN_NAMESPACE(X) namespace X _GLIBCXX_VISIBILITY_ATTR(default) {
 152 #  define _GLIBCXX_END_NAMESPACE }
 153 #  define _GLIBCXX_EXTERN_TEMPLATE -1
 154 # endif
 155
 156 # if __NO_INLINE__ && !__GXX_WEAK__
 157 #  warning currently using namespace associated mode which may fail \
 158    without inlining due to lack of weak symbols
 159 # endif
 160
 161 # define _GLIBCXX_BEGIN_NESTED_NAMESPACE(X, Y)  namespace X { namespace Y _GLIBCXX_VISIBILITY_ATTR(default) {
 162 # define _GLIBCXX_END_NESTED_NAMESPACE } }
 163 #endif
 164
 165 // Namespace associations for debug mode.
 166 #if _GLIBCXX_NAMESPACE_ASSOCIATION_DEBUG
 167 namespace std
 168 {
 169   namespace __norm { }
 170   inline namespace __debug { }
 171   inline namespace __cxx1998 { }
 172 }
 173 #endif
 174
 175 // Namespace associations for parallel mode.
 176 #if _GLIBCXX_NAMESPACE_ASSOCIATION_PARALLEL
 177 namespace std
 178 {
 179   namespace __norm { }
 180   inline namespace __parallel { }
 181   inline namespace __cxx1998 { }
 182 }
 183 #endif
 184
 185 // Namespace associations for versioning mode.
 186 #if _GLIBCXX_NAMESPACE_ASSOCIATION_VERSION
 187 namespace std
 188 {
 189   inline namespace _6 { }
 190 }
 191
 192 namespace __gnu_cxx
 193 {
 194   inline namespace _6 { }
 195 }
 196
 197 namespace std
 198 {
 199   namespace tr1
 200   {
 201     inline namespace _6 { }
 202   }
 203 }
 204 #endif
 205
 206 // XXX GLIBCXX_ABI Deprecated
 207 // Define if compatibility should be provided for -mlong-double-64
 208 #undef _GLIBCXX_LONG_DOUBLE_COMPAT
 209
 210 // Namespace associations for long double 128 mode.
 211 #if defined _GLIBCXX_LONG_DOUBLE_COMPAT && defined __LONG_DOUBLE_128__
 212 namespace std
 213 {
 214   inline namespace __gnu_cxx_ldbl128 { }
 215 }
 216 # define _GLIBCXX_LDBL_NAMESPACE __gnu_cxx_ldbl128::
 217 # define _GLIBCXX_BEGIN_LDBL_NAMESPACE namespace __gnu_cxx_ldbl128 {
 218 # define _GLIBCXX_END_LDBL_NAMESPACE }
 219 #else
 220 # define _GLIBCXX_LDBL_NAMESPACE
 221 # define _GLIBCXX_BEGIN_LDBL_NAMESPACE
 222 # define _GLIBCXX_END_LDBL_NAMESPACE
 223 #endif
 224
 225
 226 // Defines for C compatibility. In particular, define extern "C"
 227 // linkage only when using C++.
 228 # define _GLIBCXX_BEGIN_EXTERN_C extern "C" {
 229 # define _GLIBCXX_END_EXTERN_C }
 230
 231 #else // !__cplusplus
 232 # undef _GLIBCXX_BEGIN_NAMESPACE
 233 # undef _GLIBCXX_END_NAMESPACE
 234 # define _GLIBCXX_BEGIN_NAMESPACE(X)
 235 # define _GLIBCXX_END_NAMESPACE
 236 # define _GLIBCXX_BEGIN_EXTERN_C
 237 # define _GLIBCXX_END_EXTERN_C
 238 #endif
 239
 240 // First includes.
 241
 242 // Pick up any OS-specific definitions.
 243 #include <bits/os_defines.h>
 244
 245 // Pick up any CPU-specific definitions.
 246 #include <bits/cpu_defines.h>
 247
 248 // Allow use of "export template." This is currently not a feature
 249 // that g++ supports.
 250 // #define _GLIBCXX_EXPORT_TEMPLATE 1
 251
 252 // Allow use of the GNU syntax extension, "extern template." This
 253 // extension is fully documented in the g++ manual, but in a nutshell,
 254 // it inhibits all implicit instantiations and is used throughout the
 255 // library to avoid multiple weak definitions for required types that
 256 // are already explicitly instantiated in the library binary. This
 257 // substantially reduces the binary size of resulting executables.
 258 #ifndef _GLIBCXX_EXTERN_TEMPLATE
 259 # define _GLIBCXX_EXTERN_TEMPLATE 1
 260 #endif
 261
 262 // Certain function definitions that are meant to be overridable from
 263 // user code are decorated with this macro.  For some targets, this
 264 // macro causes these definitions to be weak.
 265 #ifndef _GLIBCXX_WEAK_DEFINITION
 266 # define _GLIBCXX_WEAK_DEFINITION
 267 #endif
 268
 269 // Assert.
 270 // Avoid the use of assert, because we're trying to keep the <cassert>
 271 // include out of the mix.
 272 #if !defined(_GLIBCXX_DEBUG) && !defined(_GLIBCXX_PARALLEL)
 273 #define __glibcxx_assert(_Condition)
 274 #else
 275 _GLIBCXX_BEGIN_NAMESPACE(std)
 276   // Avoid the use of assert, because we're trying to keep the <cassert>
 277   // include out of the mix.
 278   inline void
 279   __replacement_assert(const char* __file, int __line,
 280                        const char* __function, const char* __condition)
 281   {
 282     __builtin_printf("%s:%d: %s: Assertion '%s' failed.\n", __file, __line,
 283                      __function, __condition);
 284     __builtin_abort();
 285   }
 286 _GLIBCXX_END_NAMESPACE
 287
 288 #define __glibcxx_assert(_Condition)                                    \
 289   do                                                                    \
 290   {                                                                     \
 291     if (! (_Condition))                                                 \
 292       std::__replacement_assert(__FILE__, __LINE__,                     \
 293                                 __PRETTY_FUNCTION__, #_Condition);      \
 294   } while (false)
 295 #endif
 296
 297 // The remainder of the prewritten config is automatic; all the
 298 // user hooks are listed above.
 299
 300 // Create a boolean flag to be used to determine if --fast-math is set.
 301 #ifdef __FAST_MATH__
 302 # define _GLIBCXX_FAST_MATH 1
 303 #else
 304 # define _GLIBCXX_FAST_MATH 0
 305 #endif
 306
 307 // This marks string literals in header files to be extracted for eventual
 308 // translation.  It is primarily used for messages in thrown exceptions; see
 309 // src/functexcept.cc.  We use __N because the more traditional _N is used
 310 // for something else under certain OSes (see BADNAMES).
 311 #define __N(msgid)     (msgid)
 312
 313 // For example, <windows.h> is known to #define min and max as macros...
 314 #undef min
 315 #undef max
 316
 317 // End of prewritten config; the discovered settings follow.