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

   1 // Predefined symbols and macros -*- C++ -*-
   2
   3 // Copyright (C) 1997-2016 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/c++config.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_CXX_CONFIG_H
  31 #define _GLIBCXX_CXX_CONFIG_H 1
  32
  33 // The current version of the C++ library in compressed ISO date format.
  34 #define __GLIBCXX__
  35
  36 // Macros for various attributes.
  37 //   _GLIBCXX_PURE
  38 //   _GLIBCXX_CONST
  39 //   _GLIBCXX_NORETURN
  40 //   _GLIBCXX_NOTHROW
  41 //   _GLIBCXX_VISIBILITY
  42 #ifndef _GLIBCXX_PURE
  43 # define _GLIBCXX_PURE __attribute__ ((__pure__))
  44 #endif
  45
  46 #ifndef _GLIBCXX_CONST
  47 # define _GLIBCXX_CONST __attribute__ ((__const__))
  48 #endif
  49
  50 #ifndef _GLIBCXX_NORETURN
  51 # define _GLIBCXX_NORETURN __attribute__ ((__noreturn__))
  52 #endif
  53
  54 // See below for C++
  55 #ifndef _GLIBCXX_NOTHROW
  56 # ifndef __cplusplus
  57 #  define _GLIBCXX_NOTHROW __attribute__((__nothrow__))
  58 # endif
  59 #endif
  60
  61 // Macros for visibility attributes.
  62 //   _GLIBCXX_HAVE_ATTRIBUTE_VISIBILITY
  63 //   _GLIBCXX_VISIBILITY
  64 #define _GLIBCXX_HAVE_ATTRIBUTE_VISIBILITY
  65
  66 #if _GLIBCXX_HAVE_ATTRIBUTE_VISIBILITY
  67 # define _GLIBCXX_VISIBILITY(V) __attribute__ ((__visibility__ (#V)))
  68 #else
  69 // If this is not supplied by the OS-specific or CPU-specific
  70 // headers included below, it will be defined to an empty default.
  71 # define _GLIBCXX_VISIBILITY(V) _GLIBCXX_PSEUDO_VISIBILITY(V)
  72 #endif
  73
  74 // Macros for deprecated attributes.
  75 //   _GLIBCXX_USE_DEPRECATED
  76 //   _GLIBCXX_DEPRECATED
  77 #ifndef _GLIBCXX_USE_DEPRECATED
  78 # define _GLIBCXX_USE_DEPRECATED 1
  79 #endif
  80
  81 #if defined(__DEPRECATED) && (__cplusplus >= 201103L)
  82 # define _GLIBCXX_DEPRECATED __attribute__ ((__deprecated__))
  83 #else
  84 # define _GLIBCXX_DEPRECATED
  85 #endif
  86
  87 // Macros for ABI tag attributes.
  88 #ifndef _GLIBCXX_ABI_TAG_CXX11
  89 # define _GLIBCXX_ABI_TAG_CXX11 __attribute ((__abi_tag__ ("cxx11")))
  90 #endif
  91
  92
  93 #if __cplusplus
  94
  95 // Macro for constexpr, to support in mixed 03/0x mode.
  96 #ifndef _GLIBCXX_CONSTEXPR
  97 # if __cplusplus >= 201103L
  98 #  define _GLIBCXX_CONSTEXPR constexpr
  99 #  define _GLIBCXX_USE_CONSTEXPR constexpr
 100 # else
 101 #  define _GLIBCXX_CONSTEXPR
 102 #  define _GLIBCXX_USE_CONSTEXPR const
 103 # endif
 104 #endif
 105
 106 #ifndef _GLIBCXX14_CONSTEXPR
 107 # if __cplusplus >= 201402L
 108 #  define _GLIBCXX14_CONSTEXPR constexpr
 109 # else
 110 #  define _GLIBCXX14_CONSTEXPR
 111 # endif
 112 #endif
 113
 114 // Macro for noexcept, to support in mixed 03/0x mode.
 115 #ifndef _GLIBCXX_NOEXCEPT
 116 # if __cplusplus >= 201103L
 117 #  define _GLIBCXX_NOEXCEPT noexcept
 118 #  define _GLIBCXX_NOEXCEPT_IF(_COND) noexcept(_COND)
 119 #  define _GLIBCXX_USE_NOEXCEPT noexcept
 120 #  define _GLIBCXX_THROW(_EXC)
 121 # else
 122 #  define _GLIBCXX_NOEXCEPT
 123 #  define _GLIBCXX_NOEXCEPT_IF(_COND)
 124 #  define _GLIBCXX_USE_NOEXCEPT throw()
 125 #  define _GLIBCXX_THROW(_EXC) throw(_EXC)
 126 # endif
 127 #endif
 128
 129 #ifndef _GLIBCXX_NOTHROW
 130 # define _GLIBCXX_NOTHROW _GLIBCXX_USE_NOEXCEPT
 131 #endif
 132
 133 #ifndef _GLIBCXX_THROW_OR_ABORT
 134 # if __cpp_exceptions
 135 #  define _GLIBCXX_THROW_OR_ABORT(_EXC) (throw (_EXC))
 136 # else
 137 #  define _GLIBCXX_THROW_OR_ABORT(_EXC) (__builtin_abort())
 138 # endif
 139 #endif
 140
 141 // Macro for extern template, ie controlling template linkage via use
 142 // of extern keyword on template declaration. As documented in the g++
 143 // manual, it inhibits all implicit instantiations and is used
 144 // throughout the library to avoid multiple weak definitions for
 145 // required types that are already explicitly instantiated in the
 146 // library binary. This substantially reduces the binary size of
 147 // resulting executables.
 148 // Special case: _GLIBCXX_EXTERN_TEMPLATE == -1 disallows extern
 149 // templates only in basic_string, thus activating its debug-mode
 150 // checks even at -O0.
 151 #define _GLIBCXX_EXTERN_TEMPLATE
 152
 153 /*
 154   Outline of libstdc++ namespaces.
 155
 156   namespace std
 157   {
 158     namespace __debug { }
 159     namespace __parallel { }
 160     namespace __profile { }
 161     namespace __cxx1998 { }
 162
 163     namespace __detail { }
 164
 165     namespace rel_ops { }
 166
 167     namespace tr1
 168     {
 169       namespace placeholders { }
 170       namespace regex_constants { }
 171       namespace __detail { }
 172     }
 173
 174     namespace tr2 { }
 175
 176     namespace decimal { }
 177
 178     namespace chrono { }
 179     namespace placeholders { }
 180     namespace regex_constants { }
 181     namespace this_thread { }
 182
 183     namespace experimental { }
 184   }
 185
 186   namespace abi { }
 187
 188   namespace __gnu_cxx
 189   {
 190     namespace __detail { }
 191   }
 192
 193   For full details see:
 194   http://gcc.gnu.org/onlinedocs/libstdc++/latest-doxygen/namespaces.html
 195 */
 196 namespace std
 197 {
 198   typedef __SIZE_TYPE__         size_t;
 199   typedef __PTRDIFF_TYPE__      ptrdiff_t;
 200
 201 #if __cplusplus >= 201103L
 202   typedef decltype(nullptr)     nullptr_t;
 203 #endif
 204 }
 205
 206 #define _GLIBCXX_USE_DUAL_ABI
 207
 208 #if ! _GLIBCXX_USE_DUAL_ABI
 209 // Ignore any pre-defined value of _GLIBCXX_USE_CXX11_ABI
 210 # undef _GLIBCXX_USE_CXX11_ABI
 211 #endif
 212
 213 #ifndef _GLIBCXX_USE_CXX11_ABI
 214 #define _GLIBCXX_USE_CXX11_ABI
 215 #endif
 216
 217 #if _GLIBCXX_USE_CXX11_ABI
 218 namespace std
 219 {
 220   inline namespace __cxx11 __attribute__((__abi_tag__ ("cxx11"))) { }
 221 }
 222 namespace __gnu_cxx
 223 {
 224   inline namespace __cxx11 __attribute__((__abi_tag__ ("cxx11"))) { }
 225 }
 226 # define _GLIBCXX_NAMESPACE_CXX11 __cxx11::
 227 # define _GLIBCXX_BEGIN_NAMESPACE_CXX11 namespace __cxx11 {
 228 # define _GLIBCXX_END_NAMESPACE_CXX11 }
 229 # define _GLIBCXX_DEFAULT_ABI_TAG _GLIBCXX_ABI_TAG_CXX11
 230 #else
 231 # define _GLIBCXX_NAMESPACE_CXX11
 232 # define _GLIBCXX_BEGIN_NAMESPACE_CXX11
 233 # define _GLIBCXX_END_NAMESPACE_CXX11
 234 # define _GLIBCXX_DEFAULT_ABI_TAG
 235 #endif
 236
 237
 238 // Defined if inline namespaces are used for versioning.
 239 #define _GLIBCXX_INLINE_VERSION
 240
 241 // Inline namespace for symbol versioning.
 242 #if _GLIBCXX_INLINE_VERSION
 243
 244 namespace std
 245 {
 246   inline namespace __7 { }
 247
 248   namespace rel_ops { inline namespace __7 { } }
 249
 250   namespace tr1
 251   {
 252     inline namespace __7 { }
 253     namespace placeholders { inline namespace __7 { } }
 254     namespace regex_constants { inline namespace __7 { } }
 255     namespace __detail { inline namespace __7 { } }
 256   }
 257
 258   namespace tr2
 259   { inline namespace __7 { } }
 260
 261   namespace decimal { inline namespace __7 { } }
 262
 263   namespace chrono { inline namespace __7 { } }
 264   namespace placeholders { inline namespace __7 { } }
 265   namespace regex_constants { inline namespace __7 { } }
 266   namespace this_thread { inline namespace __7 { } }
 267
 268   namespace experimental { inline namespace __7 { } }
 269
 270   namespace __detail { inline namespace __7 { } }
 271 }
 272
 273 namespace __gnu_cxx
 274 {
 275   inline namespace __7 { }
 276   namespace __detail { inline namespace __7 { } }
 277 }
 278 # define _GLIBCXX_BEGIN_NAMESPACE_VERSION namespace __7 {
 279 # define _GLIBCXX_END_NAMESPACE_VERSION }
 280 #else
 281 # define _GLIBCXX_BEGIN_NAMESPACE_VERSION
 282 # define _GLIBCXX_END_NAMESPACE_VERSION
 283 #endif
 284
 285
 286 // Inline namespaces for special modes: debug, parallel, profile.
 287 #if defined(_GLIBCXX_DEBUG) || defined(_GLIBCXX_PARALLEL) \
 288     || defined(_GLIBCXX_PROFILE)
 289 namespace std
 290 {
 291   // Non-inline namespace for components replaced by alternates in active mode.
 292   namespace __cxx1998
 293   {
 294 # if _GLIBCXX_INLINE_VERSION
 295   inline namespace __7 { }
 296 # endif
 297
 298 # if _GLIBCXX_USE_CXX11_ABI
 299   inline namespace __cxx11 __attribute__((__abi_tag__ ("cxx11"))) { }
 300 # endif
 301   }
 302
 303   // Inline namespace for debug mode.
 304 # ifdef _GLIBCXX_DEBUG
 305   inline namespace __debug { }
 306 # endif
 307
 308   // Inline namespaces for parallel mode.
 309 # ifdef _GLIBCXX_PARALLEL
 310   inline namespace __parallel { }
 311 # endif
 312
 313   // Inline namespaces for profile mode
 314 # ifdef _GLIBCXX_PROFILE
 315   inline namespace __profile { }
 316 # endif
 317 }
 318
 319 // Check for invalid usage and unsupported mixed-mode use.
 320 # if defined(_GLIBCXX_DEBUG) && defined(_GLIBCXX_PARALLEL)
 321 #  error illegal use of multiple inlined namespaces
 322 # endif
 323 # if defined(_GLIBCXX_PROFILE) && defined(_GLIBCXX_DEBUG)
 324 #  error illegal use of multiple inlined namespaces
 325 # endif
 326 # if defined(_GLIBCXX_PROFILE) && defined(_GLIBCXX_PARALLEL)
 327 #  error illegal use of multiple inlined namespaces
 328 # endif
 329
 330 // Check for invalid use due to lack for weak symbols.
 331 # if __NO_INLINE__ && !__GXX_WEAK__
 332 #  warning currently using inlined namespace mode which may fail \
 333    without inlining due to lack of weak symbols
 334 # endif
 335 #endif
 336
 337 // Macros for namespace scope. Either namespace std:: or the name
 338 // of some nested namespace within it corresponding to the active mode.
 339 // _GLIBCXX_STD_A
 340 // _GLIBCXX_STD_C
 341 //
 342 // Macros for opening/closing conditional namespaces.
 343 // _GLIBCXX_BEGIN_NAMESPACE_ALGO
 344 // _GLIBCXX_END_NAMESPACE_ALGO
 345 // _GLIBCXX_BEGIN_NAMESPACE_CONTAINER
 346 // _GLIBCXX_END_NAMESPACE_CONTAINER
 347 #if defined(_GLIBCXX_DEBUG) || defined(_GLIBCXX_PROFILE)
 348 # define _GLIBCXX_STD_C __cxx1998
 349 # define _GLIBCXX_BEGIN_NAMESPACE_CONTAINER \
 350          namespace _GLIBCXX_STD_C { _GLIBCXX_BEGIN_NAMESPACE_VERSION
 351 # define _GLIBCXX_END_NAMESPACE_CONTAINER \
 352          _GLIBCXX_END_NAMESPACE_VERSION }
 353 #endif
 354
 355 #ifdef _GLIBCXX_PARALLEL
 356 # define _GLIBCXX_STD_A __cxx1998
 357 # define _GLIBCXX_BEGIN_NAMESPACE_ALGO \
 358          namespace _GLIBCXX_STD_A { _GLIBCXX_BEGIN_NAMESPACE_VERSION
 359 # define _GLIBCXX_END_NAMESPACE_ALGO \
 360          _GLIBCXX_END_NAMESPACE_VERSION }
 361 #endif
 362
 363 #ifndef _GLIBCXX_STD_A
 364 # define _GLIBCXX_STD_A std
 365 #endif
 366
 367 #ifndef _GLIBCXX_STD_C
 368 # define _GLIBCXX_STD_C std
 369 #endif
 370
 371 #ifndef _GLIBCXX_BEGIN_NAMESPACE_ALGO
 372 # define _GLIBCXX_BEGIN_NAMESPACE_ALGO
 373 #endif
 374
 375 #ifndef _GLIBCXX_END_NAMESPACE_ALGO
 376 # define _GLIBCXX_END_NAMESPACE_ALGO
 377 #endif
 378
 379 #ifndef _GLIBCXX_BEGIN_NAMESPACE_CONTAINER
 380 # define _GLIBCXX_BEGIN_NAMESPACE_CONTAINER
 381 #endif
 382
 383 #ifndef _GLIBCXX_END_NAMESPACE_CONTAINER
 384 # define _GLIBCXX_END_NAMESPACE_CONTAINER
 385 #endif
 386
 387 // GLIBCXX_ABI Deprecated
 388 // Define if compatibility should be provided for -mlong-double-64.
 389 #undef _GLIBCXX_LONG_DOUBLE_COMPAT
 390
 391 // Inline namespace for long double 128 mode.
 392 #if defined _GLIBCXX_LONG_DOUBLE_COMPAT && defined __LONG_DOUBLE_128__
 393 namespace std
 394 {
 395   inline namespace __gnu_cxx_ldbl128 { }
 396 }
 397 # define _GLIBCXX_NAMESPACE_LDBL __gnu_cxx_ldbl128::
 398 # define _GLIBCXX_BEGIN_NAMESPACE_LDBL namespace __gnu_cxx_ldbl128 {
 399 # define _GLIBCXX_END_NAMESPACE_LDBL }
 400 #else
 401 # define _GLIBCXX_NAMESPACE_LDBL
 402 # define _GLIBCXX_BEGIN_NAMESPACE_LDBL
 403 # define _GLIBCXX_END_NAMESPACE_LDBL
 404 #endif
 405 #if _GLIBCXX_USE_CXX11_ABI
 406 # define _GLIBCXX_NAMESPACE_LDBL_OR_CXX11 _GLIBCXX_NAMESPACE_CXX11
 407 # define _GLIBCXX_BEGIN_NAMESPACE_LDBL_OR_CXX11 _GLIBCXX_BEGIN_NAMESPACE_CXX11
 408 # define _GLIBCXX_END_NAMESPACE_LDBL_OR_CXX11 _GLIBCXX_END_NAMESPACE_CXX11
 409 #else
 410 # define _GLIBCXX_NAMESPACE_LDBL_OR_CXX11 _GLIBCXX_NAMESPACE_LDBL
 411 # define _GLIBCXX_BEGIN_NAMESPACE_LDBL_OR_CXX11 _GLIBCXX_BEGIN_NAMESPACE_LDBL
 412 # define _GLIBCXX_END_NAMESPACE_LDBL_OR_CXX11 _GLIBCXX_END_NAMESPACE_LDBL
 413 #endif
 414
 415 // Debug Mode implies checking assertions.
 416 #ifdef _GLIBCXX_DEBUG
 417 # define _GLIBCXX_ASSERTIONS
 418 #endif
 419
 420 // Disable std::string explicit instantiation declarations in order to assert.
 421 #ifdef _GLIBCXX_ASSERTIONS
 422 # undef _GLIBCXX_EXTERN_TEMPLATE
 423 # define _GLIBCXX_EXTERN_TEMPLATE -1
 424 #endif
 425
 426 // Assert.
 427 #if !defined(_GLIBCXX_ASSERTIONS) && !defined(_GLIBCXX_PARALLEL)
 428 # define __glibcxx_assert(_Condition)
 429 #else
 430 namespace std
 431 {
 432   // Avoid the use of assert, because we're trying to keep the <cassert>
 433   // include out of the mix.
 434   inline void
 435   __replacement_assert(const char* __file, int __line,
 436                        const char* __function, const char* __condition)
 437   {
 438     __builtin_printf("%s:%d: %s: Assertion '%s' failed.\n", __file, __line,
 439                      __function, __condition);
 440     __builtin_abort();
 441   }
 442 }
 443 #define __glibcxx_assert(_Condition)                                     \
 444   do                                                                     \
 445   {                                                                      \
 446     if (! (_Condition))                                                  \
 447       std::__replacement_assert(__FILE__, __LINE__, __PRETTY_FUNCTION__, \
 448                                 #_Condition);                            \
 449   } while (false)
 450 #endif
 451
 452 // Macros for race detectors.
 453 // _GLIBCXX_SYNCHRONIZATION_HAPPENS_BEFORE(A) and
 454 // _GLIBCXX_SYNCHRONIZATION_HAPPENS_AFTER(A) should be used to explain
 455 // atomic (lock-free) synchronization to race detectors:
 456 // the race detector will infer a happens-before arc from the former to the
 457 // latter when they share the same argument pointer.
 458 //
 459 // The most frequent use case for these macros (and the only case in the
 460 // current implementation of the library) is atomic reference counting:
 461 //   void _M_remove_reference()
 462 //   {
 463 //     _GLIBCXX_SYNCHRONIZATION_HAPPENS_BEFORE(&this->_M_refcount);
 464 //     if (__gnu_cxx::__exchange_and_add_dispatch(&this->_M_refcount, -1) <= 0)
 465 //       {
 466 //         _GLIBCXX_SYNCHRONIZATION_HAPPENS_AFTER(&this->_M_refcount);
 467 //         _M_destroy(__a);
 468 //       }
 469 //   }
 470 // The annotations in this example tell the race detector that all memory
 471 // accesses occurred when the refcount was positive do not race with
 472 // memory accesses which occurred after the refcount became zero.
 473 #ifndef _GLIBCXX_SYNCHRONIZATION_HAPPENS_BEFORE
 474 # define  _GLIBCXX_SYNCHRONIZATION_HAPPENS_BEFORE(A)
 475 #endif
 476 #ifndef _GLIBCXX_SYNCHRONIZATION_HAPPENS_AFTER
 477 # define  _GLIBCXX_SYNCHRONIZATION_HAPPENS_AFTER(A)
 478 #endif
 479
 480 // Macros for C linkage: define extern "C" linkage only when using C++.
 481 # define _GLIBCXX_BEGIN_EXTERN_C extern "C" {
 482 # define _GLIBCXX_END_EXTERN_C }
 483
 484 #define _GLIBCXX_USE_ALLOCATOR_NEW
 485
 486 #else // !__cplusplus
 487 # define _GLIBCXX_BEGIN_EXTERN_C
 488 # define _GLIBCXX_END_EXTERN_C
 489 #endif
 490
 491
 492 // First includes.
 493
 494 // Pick up any OS-specific definitions.
 495 #include <bits/os_defines.h>
 496
 497 // Pick up any CPU-specific definitions.
 498 #include <bits/cpu_defines.h>
 499
 500 // If platform uses neither visibility nor psuedo-visibility,
 501 // specify empty default for namespace annotation macros.
 502 #ifndef _GLIBCXX_PSEUDO_VISIBILITY
 503 # define _GLIBCXX_PSEUDO_VISIBILITY(V)
 504 #endif
 505
 506 // Certain function definitions that are meant to be overridable from
 507 // user code are decorated with this macro.  For some targets, this
 508 // macro causes these definitions to be weak.
 509 #ifndef _GLIBCXX_WEAK_DEFINITION
 510 # define _GLIBCXX_WEAK_DEFINITION
 511 #endif
 512
 513 // By default, we assume that __GXX_WEAK__ also means that there is support
 514 // for declaring functions as weak while not defining such functions.  This
 515 // allows for referring to functions provided by other libraries (e.g.,
 516 // libitm) without depending on them if the respective features are not used.
 517 #ifndef _GLIBCXX_USE_WEAK_REF
 518 # define _GLIBCXX_USE_WEAK_REF __GXX_WEAK__
 519 #endif
 520
 521 // Conditionally enable annotations for the Transactional Memory TS on C++11.
 522 // Most of the following conditions are due to limitations in the current
 523 // implementation.
 524 #if __cplusplus >= 201103L && _GLIBCXX_USE_CXX11_ABI                    \
 525   && _GLIBCXX_USE_DUAL_ABI && __cpp_transactional_memory >= 201505L     \
 526   &&  !_GLIBCXX_FULLY_DYNAMIC_STRING && _GLIBCXX_USE_WEAK_REF           \
 527   && _GLIBCXX_USE_ALLOCATOR_NEW
 528 #define _GLIBCXX_TXN_SAFE transaction_safe
 529 #define _GLIBCXX_TXN_SAFE_DYN transaction_safe_dynamic
 530 #else
 531 #define _GLIBCXX_TXN_SAFE
 532 #define _GLIBCXX_TXN_SAFE_DYN
 533 #endif
 534
 535
 536 // The remainder of the prewritten config is automatic; all the
 537 // user hooks are listed above.
 538
 539 // Create a boolean flag to be used to determine if --fast-math is set.
 540 #ifdef __FAST_MATH__
 541 # define _GLIBCXX_FAST_MATH 1
 542 #else
 543 # define _GLIBCXX_FAST_MATH 0
 544 #endif
 545
 546 // This marks string literals in header files to be extracted for eventual
 547 // translation.  It is primarily used for messages in thrown exceptions; see
 548 // src/functexcept.cc.  We use __N because the more traditional _N is used
 549 // for something else under certain OSes (see BADNAMES).
 550 #define __N(msgid)     (msgid)
 551
 552 // For example, <windows.h> is known to #define min and max as macros...
 553 #undef min
 554 #undef max
 555
 556 // N.B. these _GLIBCXX_USE_C99_XXX macros are defined unconditionally
 557 // so they should be tested with #if not with #ifdef.
 558 #if __cplusplus >= 201103L
 559 # ifndef _GLIBCXX_USE_C99_MATH
 560 #  define _GLIBCXX_USE_C99_MATH _GLIBCXX11_USE_C99_MATH
 561 # endif
 562 # ifndef _GLIBCXX_USE_C99_COMPLEX
 563 # define _GLIBCXX_USE_C99_COMPLEX _GLIBCXX11_USE_C99_COMPLEX
 564 # endif
 565 # ifndef _GLIBCXX_USE_C99_STDIO
 566 # define _GLIBCXX_USE_C99_STDIO _GLIBCXX11_USE_C99_STDIO
 567 # endif
 568 # ifndef _GLIBCXX_USE_C99_STDLIB
 569 # define _GLIBCXX_USE_C99_STDLIB _GLIBCXX11_USE_C99_STDLIB
 570 # endif
 571 # ifndef _GLIBCXX_USE_C99_WCHAR
 572 # define _GLIBCXX_USE_C99_WCHAR _GLIBCXX11_USE_C99_WCHAR
 573 # endif
 574 #else
 575 # ifndef _GLIBCXX_USE_C99_MATH
 576 #  define _GLIBCXX_USE_C99_MATH _GLIBCXX98_USE_C99_MATH
 577 # endif
 578 # ifndef _GLIBCXX_USE_C99_COMPLEX
 579 # define _GLIBCXX_USE_C99_COMPLEX _GLIBCXX98_USE_C99_COMPLEX
 580 # endif
 581 # ifndef _GLIBCXX_USE_C99_STDIO
 582 # define _GLIBCXX_USE_C99_STDIO _GLIBCXX98_USE_C99_STDIO
 583 # endif
 584 # ifndef _GLIBCXX_USE_C99_STDLIB
 585 # define _GLIBCXX_USE_C99_STDLIB _GLIBCXX98_USE_C99_STDLIB
 586 # endif
 587 # ifndef _GLIBCXX_USE_C99_WCHAR
 588 # define _GLIBCXX_USE_C99_WCHAR _GLIBCXX98_USE_C99_WCHAR
 589 # endif
 590 #endif
 591
 592 // End of prewritten config; the settings discovered at configure time follow.