1 // Boost config.hpp configuration header file ------------------------------//
3 // Copyright (c) 2001-2003 John Maddock
4 // Copyright (c) 2001 Darin Adler
5 // Copyright (c) 2001 Peter Dimov
6 // Copyright (c) 2002 Bill Kempf
7 // Copyright (c) 2002 Jens Maurer
8 // Copyright (c) 2002-2003 David Abrahams
9 // Copyright (c) 2003 Gennaro Prota
10 // Copyright (c) 2003 Eric Friedman
11 // Copyright (c) 2010 Eric Jourdanneau, Joel Falcou
12 // Distributed under the Boost Software License, Version 1.0. (See
13 // accompanying file LICENSE_1_0.txt or copy at
14 // http://www.boost.org/LICENSE_1_0.txt)
16 // See http://www.boost.org/ for most recent version.
18 // Boost config.hpp policy and rationale documentation has been moved to
19 // http://www.boost.org/libs/config/
21 // This file is intended to be stable, and relatively unchanging.
22 // It should contain boilerplate code only - no compiler specific
23 // code unless it is unavoidable - no changes unless unavoidable.
25 #ifndef BOOST_CONFIG_SUFFIX_HPP
26 #define BOOST_CONFIG_SUFFIX_HPP
28 #if defined(__GNUC__) && (__GNUC__ >= 4)
30 // Some GCC-4.x versions issue warnings even when __extension__ is used,
31 // so use this as a workaround:
33 #pragma GCC system_header
37 // ensure that visibility macros are always defined, thus symplifying use
39 #ifndef BOOST_SYMBOL_EXPORT
40 # define BOOST_SYMBOL_EXPORT
42 #ifndef BOOST_SYMBOL_IMPORT
43 # define BOOST_SYMBOL_IMPORT
45 #ifndef BOOST_SYMBOL_VISIBLE
46 # define BOOST_SYMBOL_VISIBLE
50 // look for long long by looking for the appropriate macros in <limits.h>.
51 // Note that we use limits.h rather than climits for maximal portability,
52 // remember that since these just declare a bunch of macros, there should be
53 // no namespace issues from this.
55 #if !defined(BOOST_HAS_LONG_LONG) && !defined(BOOST_NO_LONG_LONG) \
56 && !defined(BOOST_MSVC) && !defined(__BORLANDC__)
58 # if (defined(ULLONG_MAX) || defined(ULONG_LONG_MAX) || defined(ULONGLONG_MAX))
59 # define BOOST_HAS_LONG_LONG
61 # define BOOST_NO_LONG_LONG
65 // GCC 3.x will clean up all of those nasty macro definitions that
66 // BOOST_NO_CTYPE_FUNCTIONS is intended to help work around, so undefine
68 #if defined(__GNUC__) && (__GNUC__ >= 3) && defined(BOOST_NO_CTYPE_FUNCTIONS)
69 # undef BOOST_NO_CTYPE_FUNCTIONS
73 // Assume any extensions are in namespace std:: unless stated otherwise:
75 # ifndef BOOST_STD_EXTENSION_NAMESPACE
76 # define BOOST_STD_EXTENSION_NAMESPACE std
80 // If cv-qualified specializations are not allowed, then neither are cv-void ones:
82 # if defined(BOOST_NO_CV_SPECIALIZATIONS) \
83 && !defined(BOOST_NO_CV_VOID_SPECIALIZATIONS)
84 # define BOOST_NO_CV_VOID_SPECIALIZATIONS
88 // If there is no numeric_limits template, then it can't have any compile time
91 # if defined(BOOST_NO_LIMITS) \
92 && !defined(BOOST_NO_LIMITS_COMPILE_TIME_CONSTANTS)
93 # define BOOST_NO_LIMITS_COMPILE_TIME_CONSTANTS
94 # define BOOST_NO_MS_INT64_NUMERIC_LIMITS
95 # define BOOST_NO_LONG_LONG_NUMERIC_LIMITS
99 // if there is no long long then there is no specialisation
100 // for numeric_limits<long long> either:
102 #if !defined(BOOST_HAS_LONG_LONG) && !defined(BOOST_NO_LONG_LONG_NUMERIC_LIMITS)
103 # define BOOST_NO_LONG_LONG_NUMERIC_LIMITS
107 // Normalize BOOST_NO_STATIC_ASSERT and (depricated) BOOST_HAS_STATIC_ASSERT:
109 #if !defined(BOOST_NO_STATIC_ASSERT) && !defined(BOOST_HAS_STATIC_ASSERT)
110 # define BOOST_HAS_STATIC_ASSERT
114 // if there is no __int64 then there is no specialisation
115 // for numeric_limits<__int64> either:
117 #if !defined(BOOST_HAS_MS_INT64) && !defined(BOOST_NO_MS_INT64_NUMERIC_LIMITS)
118 # define BOOST_NO_MS_INT64_NUMERIC_LIMITS
122 // if member templates are supported then so is the
123 // VC6 subset of member templates:
125 # if !defined(BOOST_NO_MEMBER_TEMPLATES) \
126 && !defined(BOOST_MSVC6_MEMBER_TEMPLATES)
127 # define BOOST_MSVC6_MEMBER_TEMPLATES
131 // Without partial specialization, can't test for partial specialisation bugs:
133 # if defined(BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION) \
134 && !defined(BOOST_BCB_PARTIAL_SPECIALIZATION_BUG)
135 # define BOOST_BCB_PARTIAL_SPECIALIZATION_BUG
139 // Without partial specialization, we can't have array-type partial specialisations:
141 # if defined(BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION) \
142 && !defined(BOOST_NO_ARRAY_TYPE_SPECIALIZATIONS)
143 # define BOOST_NO_ARRAY_TYPE_SPECIALIZATIONS
147 // Without partial specialization, std::iterator_traits can't work:
149 # if defined(BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION) \
150 && !defined(BOOST_NO_STD_ITERATOR_TRAITS)
151 # define BOOST_NO_STD_ITERATOR_TRAITS
155 // Without partial specialization, partial
156 // specialization with default args won't work either:
158 # if defined(BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION) \
159 && !defined(BOOST_NO_PARTIAL_SPECIALIZATION_IMPLICIT_DEFAULT_ARGS)
160 # define BOOST_NO_PARTIAL_SPECIALIZATION_IMPLICIT_DEFAULT_ARGS
164 // Without member template support, we can't have template constructors
165 // in the standard library either:
167 # if defined(BOOST_NO_MEMBER_TEMPLATES) \
168 && !defined(BOOST_MSVC6_MEMBER_TEMPLATES) \
169 && !defined(BOOST_NO_TEMPLATED_ITERATOR_CONSTRUCTORS)
170 # define BOOST_NO_TEMPLATED_ITERATOR_CONSTRUCTORS
174 // Without member template support, we can't have a conforming
175 // std::allocator template either:
177 # if defined(BOOST_NO_MEMBER_TEMPLATES) \
178 && !defined(BOOST_MSVC6_MEMBER_TEMPLATES) \
179 && !defined(BOOST_NO_STD_ALLOCATOR)
180 # define BOOST_NO_STD_ALLOCATOR
184 // without ADL support then using declarations will break ADL as well:
186 #if defined(BOOST_NO_ARGUMENT_DEPENDENT_LOOKUP) && !defined(BOOST_FUNCTION_SCOPE_USING_DECLARATION_BREAKS_ADL)
187 # define BOOST_FUNCTION_SCOPE_USING_DECLARATION_BREAKS_ADL
191 // Without typeid support we have no dynamic RTTI either:
193 #if defined(BOOST_NO_TYPEID) && !defined(BOOST_NO_RTTI)
194 # define BOOST_NO_RTTI
198 // If we have a standard allocator, then we have a partial one as well:
200 #if !defined(BOOST_NO_STD_ALLOCATOR)
201 # define BOOST_HAS_PARTIAL_STD_ALLOCATOR
205 // We can't have a working std::use_facet if there is no std::locale:
207 # if defined(BOOST_NO_STD_LOCALE) && !defined(BOOST_NO_STD_USE_FACET)
208 # define BOOST_NO_STD_USE_FACET
212 // We can't have a std::messages facet if there is no std::locale:
214 # if defined(BOOST_NO_STD_LOCALE) && !defined(BOOST_NO_STD_MESSAGES)
215 # define BOOST_NO_STD_MESSAGES
219 // We can't have a working std::wstreambuf if there is no std::locale:
221 # if defined(BOOST_NO_STD_LOCALE) && !defined(BOOST_NO_STD_WSTREAMBUF)
222 # define BOOST_NO_STD_WSTREAMBUF
226 // We can't have a <cwctype> if there is no <cwchar>:
228 # if defined(BOOST_NO_CWCHAR) && !defined(BOOST_NO_CWCTYPE)
229 # define BOOST_NO_CWCTYPE
233 // We can't have a swprintf if there is no <cwchar>:
235 # if defined(BOOST_NO_CWCHAR) && !defined(BOOST_NO_SWPRINTF)
236 # define BOOST_NO_SWPRINTF
240 // If Win32 support is turned off, then we must turn off
241 // threading support also, unless there is some other
242 // thread API enabled:
244 #if defined(BOOST_DISABLE_WIN32) && defined(_WIN32) \
245 && !defined(BOOST_DISABLE_THREADS) && !defined(BOOST_HAS_PTHREADS)
246 # define BOOST_DISABLE_THREADS
250 // Turn on threading support if the compiler thinks that it's in
251 // multithreaded mode. We put this here because there are only a
252 // limited number of macros that identify this (if there's any missing
253 // from here then add to the appropriate compiler section):
255 #if (defined(__MT__) || defined(_MT) || defined(_REENTRANT) \
256 || defined(_PTHREADS) || defined(__APPLE__) || defined(__DragonFly__)) \
257 && !defined(BOOST_HAS_THREADS)
258 # define BOOST_HAS_THREADS
262 // Turn threading support off if BOOST_DISABLE_THREADS is defined:
264 #if defined(BOOST_DISABLE_THREADS) && defined(BOOST_HAS_THREADS)
265 # undef BOOST_HAS_THREADS
269 // Turn threading support off if we don't recognise the threading API:
271 #if defined(BOOST_HAS_THREADS) && !defined(BOOST_HAS_PTHREADS)\
272 && !defined(BOOST_HAS_WINTHREADS) && !defined(BOOST_HAS_BETHREADS)\
273 && !defined(BOOST_HAS_MPTASKS)
274 # undef BOOST_HAS_THREADS
278 // Turn threading detail macros off if we don't (want to) use threading
280 #ifndef BOOST_HAS_THREADS
281 # undef BOOST_HAS_PTHREADS
282 # undef BOOST_HAS_PTHREAD_MUTEXATTR_SETTYPE
283 # undef BOOST_HAS_PTHREAD_YIELD
284 # undef BOOST_HAS_PTHREAD_DELAY_NP
285 # undef BOOST_HAS_WINTHREADS
286 # undef BOOST_HAS_BETHREADS
287 # undef BOOST_HAS_MPTASKS
291 // If the compiler claims to be C99 conformant, then it had better
292 // have a <stdint.h>:
294 # if defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 199901)
295 # define BOOST_HAS_STDINT_H
296 # ifndef BOOST_HAS_LOG1P
297 # define BOOST_HAS_LOG1P
299 # ifndef BOOST_HAS_EXPM1
300 # define BOOST_HAS_EXPM1
305 // Define BOOST_NO_SLIST and BOOST_NO_HASH if required.
306 // Note that this is for backwards compatibility only.
308 # if !defined(BOOST_HAS_SLIST) && !defined(BOOST_NO_SLIST)
309 # define BOOST_NO_SLIST
312 # if !defined(BOOST_HAS_HASH) && !defined(BOOST_NO_HASH)
313 # define BOOST_NO_HASH
317 // Set BOOST_SLIST_HEADER if not set already:
319 #if defined(BOOST_HAS_SLIST) && !defined(BOOST_SLIST_HEADER)
320 # define BOOST_SLIST_HEADER <slist>
324 // Set BOOST_HASH_SET_HEADER if not set already:
326 #if defined(BOOST_HAS_HASH) && !defined(BOOST_HASH_SET_HEADER)
327 # define BOOST_HASH_SET_HEADER <hash_set>
331 // Set BOOST_HASH_MAP_HEADER if not set already:
333 #if defined(BOOST_HAS_HASH) && !defined(BOOST_HASH_MAP_HEADER)
334 # define BOOST_HASH_MAP_HEADER <hash_map>
338 // Set BOOST_NO_INITIALIZER_LISTS if there is no library support.
341 #if defined(BOOST_NO_0X_HDR_INITIALIZER_LIST) && !defined(BOOST_NO_INITIALIZER_LISTS)
342 # define BOOST_NO_INITIALIZER_LISTS
344 #if defined(BOOST_NO_INITIALIZER_LISTS) && !defined(BOOST_NO_0X_HDR_INITIALIZER_LIST)
345 # define BOOST_NO_0X_HDR_INITIALIZER_LIST
349 // Set BOOST_HAS_RVALUE_REFS when BOOST_NO_RVALUE_REFERENCES is not defined
351 #if !defined(BOOST_NO_RVALUE_REFERENCES) && !defined(BOOST_HAS_RVALUE_REFS)
352 #define BOOST_HAS_RVALUE_REFS
356 // Set BOOST_HAS_VARIADIC_TMPL when BOOST_NO_VARIADIC_TEMPLATES is not defined
358 #if !defined(BOOST_NO_VARIADIC_TEMPLATES) && !defined(BOOST_HAS_VARIADIC_TMPL)
359 #define BOOST_HAS_VARIADIC_TMPL
362 // BOOST_HAS_ABI_HEADERS
363 // This macro gets set if we have headers that fix the ABI,
364 // and prevent ODR violations when linking to external libraries:
365 #if defined(BOOST_ABI_PREFIX) && defined(BOOST_ABI_SUFFIX) && !defined(BOOST_HAS_ABI_HEADERS)
366 # define BOOST_HAS_ABI_HEADERS
369 #if defined(BOOST_HAS_ABI_HEADERS) && defined(BOOST_DISABLE_ABI_HEADERS)
370 # undef BOOST_HAS_ABI_HEADERS
373 // BOOST_NO_STDC_NAMESPACE workaround --------------------------------------//
374 // Because std::size_t usage is so common, even in boost headers which do not
375 // otherwise use the C library, the <cstddef> workaround is included here so
376 // that ugly workaround code need not appear in many other boost headers.
377 // NOTE WELL: This is a workaround for non-conforming compilers; <cstddef>
378 // must still be #included in the usual places so that <cstddef> inclusion
379 // works as expected with standard conforming compilers. The resulting
380 // double inclusion of <cstddef> is harmless.
382 # if defined(BOOST_NO_STDC_NAMESPACE) && defined(__cplusplus)
384 namespace std
{ using ::ptrdiff_t; using ::size_t; }
387 // Workaround for the unfortunate min/max macros defined by some platform headers
389 #define BOOST_PREVENT_MACRO_SUBSTITUTION
391 #ifndef BOOST_USING_STD_MIN
392 # define BOOST_USING_STD_MIN() using std::min
395 #ifndef BOOST_USING_STD_MAX
396 # define BOOST_USING_STD_MAX() using std::max
399 // BOOST_NO_STD_MIN_MAX workaround -----------------------------------------//
401 # if defined(BOOST_NO_STD_MIN_MAX) && defined(__cplusplus)
405 inline const _Tp
& min
BOOST_PREVENT_MACRO_SUBSTITUTION (const _Tp
& __a
, const _Tp
& __b
) {
406 return __b
< __a
? __b
: __a
;
409 inline const _Tp
& max
BOOST_PREVENT_MACRO_SUBSTITUTION (const _Tp
& __a
, const _Tp
& __b
) {
410 return __a
< __b
? __b
: __a
;
416 // BOOST_STATIC_CONSTANT workaround --------------------------------------- //
417 // On compilers which don't allow in-class initialization of static integral
418 // constant members, we must use enums as a workaround if we want the constants
419 // to be available at compile-time. This macro gives us a convenient way to
420 // declare such constants.
422 # ifdef BOOST_NO_INCLASS_MEMBER_INITIALIZATION
423 # define BOOST_STATIC_CONSTANT(type, assignment) enum { assignment }
425 # define BOOST_STATIC_CONSTANT(type, assignment) static const type assignment
428 // BOOST_USE_FACET / HAS_FACET workaround ----------------------------------//
429 // When the standard library does not have a conforming std::use_facet there
430 // are various workarounds available, but they differ from library to library.
431 // The same problem occurs with has_facet.
432 // These macros provide a consistent way to access a locale's facets.
435 // std::use_facet<Type>(loc);
437 // BOOST_USE_FACET(Type, loc);
438 // Note do not add a std:: prefix to the front of BOOST_USE_FACET!
439 // Use for BOOST_HAS_FACET is analogous.
441 #if defined(BOOST_NO_STD_USE_FACET)
442 # ifdef BOOST_HAS_TWO_ARG_USE_FACET
443 # define BOOST_USE_FACET(Type, loc) std::use_facet(loc, static_cast<Type*>(0))
444 # define BOOST_HAS_FACET(Type, loc) std::has_facet(loc, static_cast<Type*>(0))
445 # elif defined(BOOST_HAS_MACRO_USE_FACET)
446 # define BOOST_USE_FACET(Type, loc) std::_USE(loc, Type)
447 # define BOOST_HAS_FACET(Type, loc) std::_HAS(loc, Type)
448 # elif defined(BOOST_HAS_STLP_USE_FACET)
449 # define BOOST_USE_FACET(Type, loc) (*std::_Use_facet<Type >(loc))
450 # define BOOST_HAS_FACET(Type, loc) std::has_facet< Type >(loc)
453 # define BOOST_USE_FACET(Type, loc) std::use_facet< Type >(loc)
454 # define BOOST_HAS_FACET(Type, loc) std::has_facet< Type >(loc)
457 // BOOST_NESTED_TEMPLATE workaround ------------------------------------------//
458 // Member templates are supported by some compilers even though they can't use
459 // the A::template member<U> syntax, as a workaround replace:
461 // typedef typename A::template rebind<U> binder;
465 // typedef typename A::BOOST_NESTED_TEMPLATE rebind<U> binder;
467 #ifndef BOOST_NO_MEMBER_TEMPLATE_KEYWORD
468 # define BOOST_NESTED_TEMPLATE template
470 # define BOOST_NESTED_TEMPLATE
473 // BOOST_UNREACHABLE_RETURN(x) workaround -------------------------------------//
474 // Normally evaluates to nothing, unless BOOST_NO_UNREACHABLE_RETURN_DETECTION
475 // is defined, in which case it evaluates to return x; Use when you have a return
476 // statement that can never be reached.
478 #ifdef BOOST_NO_UNREACHABLE_RETURN_DETECTION
479 # define BOOST_UNREACHABLE_RETURN(x) return x;
481 # define BOOST_UNREACHABLE_RETURN(x)
484 // BOOST_DEDUCED_TYPENAME workaround ------------------------------------------//
486 // Some compilers don't support the use of `typename' for dependent
487 // types in deduced contexts, e.g.
489 // template <class T> void f(T, typename T::type);
491 // Replace these declarations with:
493 // template <class T> void f(T, BOOST_DEDUCED_TYPENAME T::type);
495 #ifndef BOOST_NO_DEDUCED_TYPENAME
496 # define BOOST_DEDUCED_TYPENAME typename
498 # define BOOST_DEDUCED_TYPENAME
501 #ifndef BOOST_NO_TYPENAME_WITH_CTOR
502 # define BOOST_CTOR_TYPENAME typename
504 # define BOOST_CTOR_TYPENAME
507 // long long workaround ------------------------------------------//
508 // On gcc (and maybe other compilers?) long long is alway supported
509 // but it's use may generate either warnings (with -ansi), or errors
510 // (with -pedantic -ansi) unless it's use is prefixed by __extension__
512 #if defined(BOOST_HAS_LONG_LONG) && defined(__cplusplus)
515 __extension__
typedef long long long_long_type
;
516 __extension__
typedef unsigned long long ulong_long_type
;
518 typedef long long long_long_type
;
519 typedef unsigned long long ulong_long_type
;
524 // BOOST_[APPEND_]EXPLICIT_TEMPLATE_[NON_]TYPE macros --------------------------//
526 // Some compilers have problems with function templates whose template
527 // parameters don't appear in the function parameter list (basically
528 // they just link one instantiation of the template in the final
529 // executable). These macros provide a uniform way to cope with the
530 // problem with no effects on the calling syntax.
534 // #include <iostream>
535 // #include <ostream>
536 // #include <typeinfo>
539 // void f() { std::cout << n << ' '; }
541 // template <typename T>
542 // void g() { std::cout << typeid(T).name() << ' '; }
552 // With VC++ 6.0 the output is:
559 // void f(BOOST_EXPLICIT_TEMPLATE_NON_TYPE(int, n)) { ... }
561 // template <typename T>
562 // void g(BOOST_EXPLICIT_TEMPLATE_TYPE(T)) { ... }
566 #if defined(BOOST_NO_EXPLICIT_FUNCTION_TEMPLATE_ARGUMENTS) && defined(__cplusplus)
568 # include "boost/type.hpp"
569 # include "boost/non_type.hpp"
571 # define BOOST_EXPLICIT_TEMPLATE_TYPE(t) boost::type<t>* = 0
572 # define BOOST_EXPLICIT_TEMPLATE_TYPE_SPEC(t) boost::type<t>*
573 # define BOOST_EXPLICIT_TEMPLATE_NON_TYPE(t, v) boost::non_type<t, v>* = 0
574 # define BOOST_EXPLICIT_TEMPLATE_NON_TYPE_SPEC(t, v) boost::non_type<t, v>*
576 # define BOOST_APPEND_EXPLICIT_TEMPLATE_TYPE(t) \
577 , BOOST_EXPLICIT_TEMPLATE_TYPE(t)
578 # define BOOST_APPEND_EXPLICIT_TEMPLATE_TYPE_SPEC(t) \
579 , BOOST_EXPLICIT_TEMPLATE_TYPE_SPEC(t)
580 # define BOOST_APPEND_EXPLICIT_TEMPLATE_NON_TYPE(t, v) \
581 , BOOST_EXPLICIT_TEMPLATE_NON_TYPE(t, v)
582 # define BOOST_APPEND_EXPLICIT_TEMPLATE_NON_TYPE_SPEC(t, v) \
583 , BOOST_EXPLICIT_TEMPLATE_NON_TYPE_SPEC(t, v)
587 // no workaround needed: expand to nothing
589 # define BOOST_EXPLICIT_TEMPLATE_TYPE(t)
590 # define BOOST_EXPLICIT_TEMPLATE_TYPE_SPEC(t)
591 # define BOOST_EXPLICIT_TEMPLATE_NON_TYPE(t, v)
592 # define BOOST_EXPLICIT_TEMPLATE_NON_TYPE_SPEC(t, v)
594 # define BOOST_APPEND_EXPLICIT_TEMPLATE_TYPE(t)
595 # define BOOST_APPEND_EXPLICIT_TEMPLATE_TYPE_SPEC(t)
596 # define BOOST_APPEND_EXPLICIT_TEMPLATE_NON_TYPE(t, v)
597 # define BOOST_APPEND_EXPLICIT_TEMPLATE_NON_TYPE_SPEC(t, v)
600 #endif // defined BOOST_NO_EXPLICIT_FUNCTION_TEMPLATE_ARGUMENTS
602 // When BOOST_NO_STD_TYPEINFO is defined, we can just import
603 // the global definition into std namespace:
604 #if defined(BOOST_NO_STD_TYPEINFO) && defined(__cplusplus)
606 namespace std
{ using ::type_info
; }
609 // ---------------------------------------------------------------------------//
612 // Helper macro BOOST_STRINGIZE:
613 // Converts the parameter X to a string after macro replacement
614 // on X has been performed.
616 #define BOOST_STRINGIZE(X) BOOST_DO_STRINGIZE(X)
617 #define BOOST_DO_STRINGIZE(X) #X
620 // Helper macro BOOST_JOIN:
621 // The following piece of macro magic joins the two
622 // arguments together, even when one of the arguments is
623 // itself a macro (see 16.3.1 in C++ standard). The key
624 // is that macro expansion of macro arguments does not
625 // occur in BOOST_DO_JOIN2 but does in BOOST_DO_JOIN.
627 #define BOOST_JOIN( X, Y ) BOOST_DO_JOIN( X, Y )
628 #define BOOST_DO_JOIN( X, Y ) BOOST_DO_JOIN2(X,Y)
629 #define BOOST_DO_JOIN2( X, Y ) X##Y
632 // Set some default values for compiler/library/platform names.
633 // These are for debugging config setup only:
635 # ifndef BOOST_COMPILER
636 # define BOOST_COMPILER "Unknown ISO C++ Compiler"
638 # ifndef BOOST_STDLIB
639 # define BOOST_STDLIB "Unknown ISO standard library"
641 # ifndef BOOST_PLATFORM
642 # if defined(unix) || defined(__unix) || defined(_XOPEN_SOURCE) \
643 || defined(_POSIX_SOURCE)
644 # define BOOST_PLATFORM "Generic Unix"
646 # define BOOST_PLATFORM "Unknown"
651 // Set some default values GPU support
653 # ifndef BOOST_GPU_ENABLED
654 # define BOOST_GPU_ENABLED
658 // constexpr workarounds
660 #if defined(BOOST_NO_CONSTEXPR)
661 #define BOOST_CONSTEXPR
662 #define BOOST_CONSTEXPR_OR_CONST const
664 #define BOOST_CONSTEXPR constexpr
665 #define BOOST_CONSTEXPR_OR_CONST constexpr
668 #define BOOST_STATIC_CONSTEXPR static BOOST_CONSTEXPR_OR_CONST