[ceph.git] / ceph / src / boost / libs / config / include / boost / config / compiler / gcc.hpp

//  (C) Copyright John Maddock 2001 - 2003.
//  (C) Copyright Darin Adler 2001 - 2002.
//  (C) Copyright Jens Maurer 2001 - 2002.
//  (C) Copyright Beman Dawes 2001 - 2003.
//  (C) Copyright Douglas Gregor 2002.
//  (C) Copyright David Abrahams 2002 - 2003.
//  (C) Copyright Synge Todo 2003.
//  Use, modification and distribution are subject to the
//  Boost Software License, Version 1.0. (See accompanying file
//  LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)

//  See http://www.boost.org for most recent version.

//  GNU C++ compiler setup.

//
// Define BOOST_GCC so we know this is "real" GCC and not some pretender:
//
#define BOOST_GCC_VERSION (__GNUC__ * 10000 + __GNUC_MINOR__ * 100 + __GNUC_PATCHLEVEL__)
#if !defined(__CUDACC__)
#define BOOST_GCC BOOST_GCC_VERSION
#endif

#if defined(__GXX_EXPERIMENTAL_CXX0X__) || (__cplusplus >= 201103L)
#  define BOOST_GCC_CXX11
#endif

#if __GNUC__ == 3
#  if defined (__PATHSCALE__)
#     define BOOST_NO_TWO_PHASE_NAME_LOOKUP
#     define BOOST_NO_IS_ABSTRACT
#  endif

#  if __GNUC_MINOR__ < 4
#     define BOOST_NO_IS_ABSTRACT
#  endif
#  define BOOST_NO_CXX11_EXTERN_TEMPLATE
#endif
#if __GNUC__ < 4
//
// All problems to gcc-3.x and earlier here:
//
#define BOOST_NO_TWO_PHASE_NAME_LOOKUP
#  ifdef __OPEN64__
#     define BOOST_NO_IS_ABSTRACT
#  endif
#endif

// GCC prior to 3.4 had #pragma once too but it didn't work well with filesystem links
#if BOOST_GCC_VERSION >= 30400
#define BOOST_HAS_PRAGMA_ONCE
#endif

#if BOOST_GCC_VERSION < 40400
// Previous versions of GCC did not completely implement value-initialization:
// GCC Bug 30111, "Value-initialization of POD base class doesn't initialize
// members", reported by Jonathan Wakely in 2006,
// http://gcc.gnu.org/bugzilla/show_bug.cgi?id=30111 (fixed for GCC 4.4)
// GCC Bug 33916, "Default constructor fails to initialize array members",
// reported by Michael Elizabeth Chastain in 2007,
// http://gcc.gnu.org/bugzilla/show_bug.cgi?id=33916 (fixed for GCC 4.2.4)
// See also: http://www.boost.org/libs/utility/value_init.htm#compiler_issues
#define BOOST_NO_COMPLETE_VALUE_INITIALIZATION
#endif

#if !defined(__EXCEPTIONS) && !defined(BOOST_NO_EXCEPTIONS)
# define BOOST_NO_EXCEPTIONS
#endif


//
// Threading support: Turn this on unconditionally here (except for
// those platforms where we can know for sure). It will get turned off again
// later if no threading API is detected.
//
#if !defined(__MINGW32__) && !defined(linux) && !defined(__linux) && !defined(__linux__)
# define BOOST_HAS_THREADS
#endif

//
// gcc has "long long"
// Except on Darwin with standard compliance enabled (-pedantic)
// Apple gcc helpfully defines this macro we can query
//
#if !defined(__DARWIN_NO_LONG_LONG)
# define BOOST_HAS_LONG_LONG
#endif

//
// gcc implements the named return value optimization since version 3.1
//
#define BOOST_HAS_NRVO

// Branch prediction hints
#define BOOST_LIKELY(x) __builtin_expect(x, 1)
#define BOOST_UNLIKELY(x) __builtin_expect(x, 0)

//
// Dynamic shared object (DSO) and dynamic-link library (DLL) support
//
#if __GNUC__ >= 4
#  if (defined(_WIN32) || defined(__WIN32__) || defined(WIN32)) && !defined(__CYGWIN__)
     // All Win32 development environments, including 64-bit Windows and MinGW, define
     // _WIN32 or one of its variant spellings. Note that Cygwin is a POSIX environment,
     // so does not define _WIN32 or its variants.
#    define BOOST_HAS_DECLSPEC
#    define BOOST_SYMBOL_EXPORT __attribute__((__dllexport__))
#    define BOOST_SYMBOL_IMPORT __attribute__((__dllimport__))
#  else
#    define BOOST_SYMBOL_EXPORT __attribute__((__visibility__("default")))
#    define BOOST_SYMBOL_IMPORT
#  endif
#  define BOOST_SYMBOL_VISIBLE __attribute__((__visibility__("default")))
#else
// config/platform/win32.hpp will define BOOST_SYMBOL_EXPORT, etc., unless already defined
#  define BOOST_SYMBOL_EXPORT
#endif

//
// RTTI and typeinfo detection is possible post gcc-4.3:
//
#if BOOST_GCC_VERSION > 40300
#  ifndef __GXX_RTTI
#     ifndef BOOST_NO_TYPEID
#        define BOOST_NO_TYPEID
#     endif
#     ifndef BOOST_NO_RTTI
#        define BOOST_NO_RTTI
#     endif
#  endif
#endif

//
// Recent GCC versions have __int128 when in 64-bit mode.
//
// We disable this if the compiler is really nvcc with C++03 as it
// doesn't actually support __int128 as of CUDA_VERSION=7500
// even though it defines __SIZEOF_INT128__.
// See https://svn.boost.org/trac/boost/ticket/8048
//     https://svn.boost.org/trac/boost/ticket/11852
// Only re-enable this for nvcc if you're absolutely sure
// of the circumstances under which it's supported:
//
#if defined(__CUDACC__)
#  if defined(BOOST_GCC_CXX11)
#    define BOOST_NVCC_CXX11
#  else
#    define BOOST_NVCC_CXX03
#  endif
#endif

#if defined(__SIZEOF_INT128__) && !defined(BOOST_NVCC_CXX03)
#  define BOOST_HAS_INT128
#endif
//
// Recent GCC versions have a __float128 native type, we need to
// include a std lib header to detect this - not ideal, but we'll
// be including <cstddef> later anyway when we select the std lib.
//
// Nevertheless, as of CUDA 7.5, using __float128 with the host
// compiler in pre-C++11 mode is still not supported.
// See https://svn.boost.org/trac/boost/ticket/11852
//
#ifdef __cplusplus
#include <cstddef>
#else
#include <stddef.h>
#endif
#if defined(_GLIBCXX_USE_FLOAT128) && !defined(__STRICT_ANSI__) && !defined(BOOST_NVCC_CXX03)
# define BOOST_HAS_FLOAT128
#endif

// C++0x features in 4.3.n and later
//
#if (BOOST_GCC_VERSION >= 40300) && defined(BOOST_GCC_CXX11)
// C++0x features are only enabled when -std=c++0x or -std=gnu++0x are
// passed on the command line, which in turn defines
// __GXX_EXPERIMENTAL_CXX0X__.
#  define BOOST_HAS_DECLTYPE
#  define BOOST_HAS_RVALUE_REFS
#  define BOOST_HAS_STATIC_ASSERT
#  define BOOST_HAS_VARIADIC_TMPL
#else
#  define BOOST_NO_CXX11_DECLTYPE
#  define BOOST_NO_CXX11_FUNCTION_TEMPLATE_DEFAULT_ARGS
#  define BOOST_NO_CXX11_RVALUE_REFERENCES
#  define BOOST_NO_CXX11_STATIC_ASSERT
#endif

// C++0x features in 4.4.n and later
//
#if (BOOST_GCC_VERSION < 40400) || !defined(BOOST_GCC_CXX11)
#  define BOOST_NO_CXX11_AUTO_DECLARATIONS
#  define BOOST_NO_CXX11_AUTO_MULTIDECLARATIONS
#  define BOOST_NO_CXX11_CHAR16_T
#  define BOOST_NO_CXX11_CHAR32_T
#  define BOOST_NO_CXX11_HDR_INITIALIZER_LIST
#  define BOOST_NO_CXX11_DEFAULTED_FUNCTIONS
#  define BOOST_NO_CXX11_DELETED_FUNCTIONS
#  define BOOST_NO_CXX11_TRAILING_RESULT_TYPES
#  define BOOST_NO_CXX11_INLINE_NAMESPACES
#  define BOOST_NO_CXX11_VARIADIC_TEMPLATES
#endif

#if BOOST_GCC_VERSION < 40500
#  define BOOST_NO_SFINAE_EXPR
#endif

// GCC 4.5 forbids declaration of defaulted functions in private or protected sections
#if __GNUC__ < 4 || (__GNUC__ == 4 && __GNUC_MINOR__ == 5) || !defined(BOOST_GCC_CXX11)
#  define BOOST_NO_CXX11_NON_PUBLIC_DEFAULTED_FUNCTIONS
#endif

// C++0x features in 4.5.0 and later
//
#if (BOOST_GCC_VERSION < 40500) || !defined(BOOST_GCC_CXX11)
#  define BOOST_NO_CXX11_EXPLICIT_CONVERSION_OPERATORS
#  define BOOST_NO_CXX11_LAMBDAS
#  define BOOST_NO_CXX11_LOCAL_CLASS_TEMPLATE_PARAMETERS
#  define BOOST_NO_CXX11_RAW_LITERALS
#  define BOOST_NO_CXX11_UNICODE_LITERALS
#endif

// C++0x features in 4.5.1 and later
//
#if (BOOST_GCC_VERSION < 40501) || !defined(BOOST_GCC_CXX11)
// scoped enums have a serious bug in 4.4.0, so define BOOST_NO_CXX11_SCOPED_ENUMS before 4.5.1
// See http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38064
#  define BOOST_NO_CXX11_SCOPED_ENUMS
#endif

// C++0x features in 4.6.n and later
//
#if (BOOST_GCC_VERSION < 40600) || !defined(BOOST_GCC_CXX11)
#define BOOST_NO_CXX11_CONSTEXPR
#define BOOST_NO_CXX11_NOEXCEPT
#define BOOST_NO_CXX11_NULLPTR
#define BOOST_NO_CXX11_RANGE_BASED_FOR
#define BOOST_NO_CXX11_UNIFIED_INITIALIZATION_SYNTAX
#endif

// C++0x features in 4.7.n and later
//
#if (BOOST_GCC_VERSION < 40700) || !defined(BOOST_GCC_CXX11)
#  define BOOST_NO_CXX11_FINAL
#  define BOOST_NO_CXX11_TEMPLATE_ALIASES
#  define BOOST_NO_CXX11_USER_DEFINED_LITERALS
#  define BOOST_NO_CXX11_FIXED_LENGTH_VARIADIC_TEMPLATE_EXPANSION_PACKS
#endif

// C++0x features in 4.8.n and later
//
#if (BOOST_GCC_VERSION < 40800) || !defined(BOOST_GCC_CXX11)
#  define BOOST_NO_CXX11_ALIGNAS
#  define BOOST_NO_CXX11_THREAD_LOCAL
#endif

// C++0x features in 4.8.1 and later
//
#if (BOOST_GCC_VERSION < 40801) || !defined(BOOST_GCC_CXX11)
#  define BOOST_NO_CXX11_DECLTYPE_N3276
#  define BOOST_NO_CXX11_REF_QUALIFIERS
#  define BOOST_NO_CXX14_BINARY_LITERALS
#endif

// C++14 features in 4.9.0 and later
//
#if (BOOST_GCC_VERSION < 40900) || (__cplusplus < 201300)
#  define BOOST_NO_CXX14_RETURN_TYPE_DEDUCTION
#  define BOOST_NO_CXX14_GENERIC_LAMBDAS
#  define BOOST_NO_CXX14_DIGIT_SEPARATORS
#  define BOOST_NO_CXX14_DECLTYPE_AUTO
#  if !((BOOST_GCC_VERSION >= 40801) && (BOOST_GCC_VERSION < 40900) && defined(BOOST_GCC_CXX11))
#     define BOOST_NO_CXX14_INITIALIZED_LAMBDA_CAPTURES
#  endif
#endif


// C++ 14:
#if !defined(__cpp_aggregate_nsdmi) || (__cpp_aggregate_nsdmi < 201304)
#  define BOOST_NO_CXX14_AGGREGATE_NSDMI
#endif
#if !defined(__cpp_constexpr) || (__cpp_constexpr < 201304)
#  define BOOST_NO_CXX14_CONSTEXPR
#endif
#if !defined(__cpp_variable_templates) || (__cpp_variable_templates < 201304)
#  define BOOST_NO_CXX14_VARIABLE_TEMPLATES
#endif

//
// Unused attribute:
#if __GNUC__ >= 4
#  define BOOST_ATTRIBUTE_UNUSED __attribute__((__unused__))
#endif
//
// __builtin_unreachable:
#if BOOST_GCC_VERSION >= 40800
#define BOOST_UNREACHABLE_RETURN(x) __builtin_unreachable();
#endif

#ifndef BOOST_COMPILER
#  define BOOST_COMPILER "GNU C++ version " __VERSION__
#endif

// ConceptGCC compiler:
//   http://www.generic-programming.org/software/ConceptGCC/
#ifdef __GXX_CONCEPTS__
#  define BOOST_HAS_CONCEPTS
#  define BOOST_COMPILER "ConceptGCC version " __VERSION__
#endif

// versions check:
// we don't know gcc prior to version 3.30:
#if (BOOST_GCC_VERSION< 30300)
#  error "Compiler not configured - please reconfigure"
#endif
//
// last known and checked version is 4.9:
#if (BOOST_GCC_VERSION > 40900)
#  if defined(BOOST_ASSERT_CONFIG)
#     error "Unknown compiler version - please run the configure tests and report the results"
#  else
// we don't emit warnings here anymore since there are no defect macros defined for
// gcc post 3.4, so any failures are gcc regressions...
//#     warning "Unknown compiler version - please run the configure tests and report the results"
#  endif
#endif
Commit	Line	Data
7c673cae FG	1	// (C) Copyright John Maddock 2001 - 2003.
	2	// (C) Copyright Darin Adler 2001 - 2002.
	3	// (C) Copyright Jens Maurer 2001 - 2002.
	4	// (C) Copyright Beman Dawes 2001 - 2003.
	5	// (C) Copyright Douglas Gregor 2002.
	6	// (C) Copyright David Abrahams 2002 - 2003.
	7	// (C) Copyright Synge Todo 2003.
	8	// Use, modification and distribution are subject to the
	9	// Boost Software License, Version 1.0. (See accompanying file
	10	// LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
	11
	12	// See http://www.boost.org for most recent version.
	13
	14	// GNU C++ compiler setup.
	15
	16	//
	17	// Define BOOST_GCC so we know this is "real" GCC and not some pretender:
	18	//
	19	#define BOOST_GCC_VERSION (__GNUC__ * 10000 + __GNUC_MINOR__ * 100 + __GNUC_PATCHLEVEL__)
	20	#if !defined(__CUDACC__)
	21	#define BOOST_GCC BOOST_GCC_VERSION
	22	#endif
	23
	24	#if defined(__GXX_EXPERIMENTAL_CXX0X__) \|\| (__cplusplus >= 201103L)
	25	# define BOOST_GCC_CXX11
	26	#endif
	27
	28	#if __GNUC__ == 3
	29	# if defined (__PATHSCALE__)
	30	# define BOOST_NO_TWO_PHASE_NAME_LOOKUP
	31	# define BOOST_NO_IS_ABSTRACT
	32	# endif
	33
	34	# if __GNUC_MINOR__ < 4
	35	# define BOOST_NO_IS_ABSTRACT
	36	# endif
	37	# define BOOST_NO_CXX11_EXTERN_TEMPLATE
	38	#endif
	39	#if __GNUC__ < 4
	40	//
	41	// All problems to gcc-3.x and earlier here:
	42	//
	43	#define BOOST_NO_TWO_PHASE_NAME_LOOKUP
	44	# ifdef __OPEN64__
	45	# define BOOST_NO_IS_ABSTRACT
	46	# endif
	47	#endif
	48
	49	// GCC prior to 3.4 had #pragma once too but it didn't work well with filesystem links
	50	#if BOOST_GCC_VERSION >= 30400
	51	#define BOOST_HAS_PRAGMA_ONCE
	52	#endif
	53
	54	#if BOOST_GCC_VERSION < 40400
	55	// Previous versions of GCC did not completely implement value-initialization:
	56	// GCC Bug 30111, "Value-initialization of POD base class doesn't initialize
	57	// members", reported by Jonathan Wakely in 2006,
	58	// http://gcc.gnu.org/bugzilla/show_bug.cgi?id=30111 (fixed for GCC 4.4)
	59	// GCC Bug 33916, "Default constructor fails to initialize array members",
	60	// reported by Michael Elizabeth Chastain in 2007,
	61	// http://gcc.gnu.org/bugzilla/show_bug.cgi?id=33916 (fixed for GCC 4.2.4)
	62	// See also: http://www.boost.org/libs/utility/value_init.htm#compiler_issues
	63	#define BOOST_NO_COMPLETE_VALUE_INITIALIZATION
	64	#endif
65
66	#if !defined(__EXCEPTIONS) && !defined(BOOST_NO_EXCEPTIONS)
67	# define BOOST_NO_EXCEPTIONS
68	#endif
69
70
71	//
72	// Threading support: Turn this on unconditionally here (except for
73	// those platforms where we can know for sure). It will get turned off again
74	// later if no threading API is detected.
75	//
76	#if !defined(__MINGW32__) && !defined(linux) && !defined(__linux) && !defined(__linux__)
77	# define BOOST_HAS_THREADS
78	#endif
79
80	//
81	// gcc has "long long"
82	// Except on Darwin with standard compliance enabled (-pedantic)
83	// Apple gcc helpfully defines this macro we can query
84	//
85	#if !defined(__DARWIN_NO_LONG_LONG)
86	# define BOOST_HAS_LONG_LONG
87	#endif
88
89	//
90	// gcc implements the named return value optimization since version 3.1
91	//
92	#define BOOST_HAS_NRVO
93
94	// Branch prediction hints
95	#define BOOST_LIKELY(x) __builtin_expect(x, 1)
96	#define BOOST_UNLIKELY(x) __builtin_expect(x, 0)
97
98	//
99	// Dynamic shared object (DSO) and dynamic-link library (DLL) support
100	//
101	#if __GNUC__ >= 4
102	# if (defined(_WIN32) \|\| defined(__WIN32__) \|\| defined(WIN32)) && !defined(__CYGWIN__)
103	// All Win32 development environments, including 64-bit Windows and MinGW, define
104	// _WIN32 or one of its variant spellings. Note that Cygwin is a POSIX environment,
105	// so does not define _WIN32 or its variants.
106	# define BOOST_HAS_DECLSPEC
107	# define BOOST_SYMBOL_EXPORT __attribute__((__dllexport__))
108	# define BOOST_SYMBOL_IMPORT __attribute__((__dllimport__))
109	# else
110	# define BOOST_SYMBOL_EXPORT __attribute__((__visibility__("default")))
111	# define BOOST_SYMBOL_IMPORT
112	# endif
113	# define BOOST_SYMBOL_VISIBLE __attribute__((__visibility__("default")))
114	#else
115	// config/platform/win32.hpp will define BOOST_SYMBOL_EXPORT, etc., unless already defined
116	# define BOOST_SYMBOL_EXPORT
117	#endif
118
119	//
120	// RTTI and typeinfo detection is possible post gcc-4.3:
121	//
122	#if BOOST_GCC_VERSION > 40300
123	# ifndef __GXX_RTTI
124	# ifndef BOOST_NO_TYPEID
125	# define BOOST_NO_TYPEID
126	# endif
127	# ifndef BOOST_NO_RTTI
128	# define BOOST_NO_RTTI
129	# endif
130	# endif
131	#endif
132
133	//
134	// Recent GCC versions have __int128 when in 64-bit mode.
135	//
136	// We disable this if the compiler is really nvcc with C++03 as it
137	// doesn't actually support __int128 as of CUDA_VERSION=7500
138	// even though it defines __SIZEOF_INT128__.
139	// See https://svn.boost.org/trac/boost/ticket/8048
140	// https://svn.boost.org/trac/boost/ticket/11852
141	// Only re-enable this for nvcc if you're absolutely sure
142	// of the circumstances under which it's supported:
143	//
144	#if defined(__CUDACC__)
145	# if defined(BOOST_GCC_CXX11)
146	# define BOOST_NVCC_CXX11
147	# else
148	# define BOOST_NVCC_CXX03
149	# endif
150	#endif
151
152	#if defined(__SIZEOF_INT128__) && !defined(BOOST_NVCC_CXX03)
153	# define BOOST_HAS_INT128
154	#endif
155	//
156	// Recent GCC versions have a __float128 native type, we need to
157	// include a std lib header to detect this - not ideal, but we'll
158	// be including <cstddef> later anyway when we select the std lib.
159	//
160	// Nevertheless, as of CUDA 7.5, using __float128 with the host
161	// compiler in pre-C++11 mode is still not supported.
162	// See https://svn.boost.org/trac/boost/ticket/11852
163	//
164	#ifdef __cplusplus
165	#include <cstddef>
166	#else
167	#include <stddef.h>
168	#endif
169	#if defined(_GLIBCXX_USE_FLOAT128) && !defined(__STRICT_ANSI__) && !defined(BOOST_NVCC_CXX03)
170	# define BOOST_HAS_FLOAT128
171	#endif
172
173	// C++0x features in 4.3.n and later
174	//
175	#if (BOOST_GCC_VERSION >= 40300) && defined(BOOST_GCC_CXX11)
176	// C++0x features are only enabled when -std=c++0x or -std=gnu++0x are
177	// passed on the command line, which in turn defines
178	// __GXX_EXPERIMENTAL_CXX0X__.
179	# define BOOST_HAS_DECLTYPE
180	# define BOOST_HAS_RVALUE_REFS
181	# define BOOST_HAS_STATIC_ASSERT
182	# define BOOST_HAS_VARIADIC_TMPL
183	#else
184	# define BOOST_NO_CXX11_DECLTYPE
185	# define BOOST_NO_CXX11_FUNCTION_TEMPLATE_DEFAULT_ARGS
186	# define BOOST_NO_CXX11_RVALUE_REFERENCES
187	# define BOOST_NO_CXX11_STATIC_ASSERT
188	#endif
189
190	// C++0x features in 4.4.n and later
191	//
192	#if (BOOST_GCC_VERSION < 40400) \|\| !defined(BOOST_GCC_CXX11)
193	# define BOOST_NO_CXX11_AUTO_DECLARATIONS
194	# define BOOST_NO_CXX11_AUTO_MULTIDECLARATIONS
195	# define BOOST_NO_CXX11_CHAR16_T
196	# define BOOST_NO_CXX11_CHAR32_T
197	# define BOOST_NO_CXX11_HDR_INITIALIZER_LIST
198	# define BOOST_NO_CXX11_DEFAULTED_FUNCTIONS
199	# define BOOST_NO_CXX11_DELETED_FUNCTIONS
200	# define BOOST_NO_CXX11_TRAILING_RESULT_TYPES
201	# define BOOST_NO_CXX11_INLINE_NAMESPACES
202	# define BOOST_NO_CXX11_VARIADIC_TEMPLATES
203	#endif
204
205	#if BOOST_GCC_VERSION < 40500
206	# define BOOST_NO_SFINAE_EXPR
207	#endif
208
209	// GCC 4.5 forbids declaration of defaulted functions in private or protected sections
210	#if __GNUC__ < 4 \|\| (__GNUC__ == 4 && __GNUC_MINOR__ == 5) \|\| !defined(BOOST_GCC_CXX11)
211	# define BOOST_NO_CXX11_NON_PUBLIC_DEFAULTED_FUNCTIONS
212	#endif
213
214	// C++0x features in 4.5.0 and later
215	//
216	#if (BOOST_GCC_VERSION < 40500) \|\| !defined(BOOST_GCC_CXX11)
217	# define BOOST_NO_CXX11_EXPLICIT_CONVERSION_OPERATORS
218	# define BOOST_NO_CXX11_LAMBDAS
219	# define BOOST_NO_CXX11_LOCAL_CLASS_TEMPLATE_PARAMETERS
220	# define BOOST_NO_CXX11_RAW_LITERALS
221	# define BOOST_NO_CXX11_UNICODE_LITERALS
222	#endif
223
224	// C++0x features in 4.5.1 and later
225	//
226	#if (BOOST_GCC_VERSION < 40501) \|\| !defined(BOOST_GCC_CXX11)
227	// scoped enums have a serious bug in 4.4.0, so define BOOST_NO_CXX11_SCOPED_ENUMS before 4.5.1
228	// See http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38064
229	# define BOOST_NO_CXX11_SCOPED_ENUMS
230	#endif
231
232	// C++0x features in 4.6.n and later
233	//
234	#if (BOOST_GCC_VERSION < 40600) \|\| !defined(BOOST_GCC_CXX11)
235	#define BOOST_NO_CXX11_CONSTEXPR
236	#define BOOST_NO_CXX11_NOEXCEPT
237	#define BOOST_NO_CXX11_NULLPTR
238	#define BOOST_NO_CXX11_RANGE_BASED_FOR
239	#define BOOST_NO_CXX11_UNIFIED_INITIALIZATION_SYNTAX
240	#endif
241
242	// C++0x features in 4.7.n and later
243	//
244	#if (BOOST_GCC_VERSION < 40700) \|\| !defined(BOOST_GCC_CXX11)
245	# define BOOST_NO_CXX11_FINAL
246	# define BOOST_NO_CXX11_TEMPLATE_ALIASES
247	# define BOOST_NO_CXX11_USER_DEFINED_LITERALS
248	# define BOOST_NO_CXX11_FIXED_LENGTH_VARIADIC_TEMPLATE_EXPANSION_PACKS
249	#endif
250
251	// C++0x features in 4.8.n and later
252	//
253	#if (BOOST_GCC_VERSION < 40800) \|\| !defined(BOOST_GCC_CXX11)
254	# define BOOST_NO_CXX11_ALIGNAS
255	# define BOOST_NO_CXX11_THREAD_LOCAL
256	#endif
257
258	// C++0x features in 4.8.1 and later
259	//
260	#if (BOOST_GCC_VERSION < 40801) \|\| !defined(BOOST_GCC_CXX11)
261	# define BOOST_NO_CXX11_DECLTYPE_N3276
262	# define BOOST_NO_CXX11_REF_QUALIFIERS
263	# define BOOST_NO_CXX14_BINARY_LITERALS
264	#endif
265
266	// C++14 features in 4.9.0 and later
267	//
268	#if (BOOST_GCC_VERSION < 40900) \|\| (__cplusplus < 201300)
269	# define BOOST_NO_CXX14_RETURN_TYPE_DEDUCTION
270	# define BOOST_NO_CXX14_GENERIC_LAMBDAS
271	# define BOOST_NO_CXX14_DIGIT_SEPARATORS
272	# define BOOST_NO_CXX14_DECLTYPE_AUTO
273	# if !((BOOST_GCC_VERSION >= 40801) && (BOOST_GCC_VERSION < 40900) && defined(BOOST_GCC_CXX11))
274	# define BOOST_NO_CXX14_INITIALIZED_LAMBDA_CAPTURES
275	# endif
276	#endif
277
278
279	// C++ 14:
280	#if !defined(__cpp_aggregate_nsdmi) \|\| (__cpp_aggregate_nsdmi < 201304)
281	# define BOOST_NO_CXX14_AGGREGATE_NSDMI
282	#endif
283	#if !defined(__cpp_constexpr) \|\| (__cpp_constexpr < 201304)
284	# define BOOST_NO_CXX14_CONSTEXPR
285	#endif
286	#if !defined(__cpp_variable_templates) \|\| (__cpp_variable_templates < 201304)
287	# define BOOST_NO_CXX14_VARIABLE_TEMPLATES
288	#endif
289
290	//
291	// Unused attribute:
292	#if __GNUC__ >= 4
293	# define BOOST_ATTRIBUTE_UNUSED __attribute__((__unused__))
294	#endif
295	//
296	// __builtin_unreachable:
297	#if BOOST_GCC_VERSION >= 40800
298	#define BOOST_UNREACHABLE_RETURN(x) __builtin_unreachable();
299	#endif
300
301	#ifndef BOOST_COMPILER
302	# define BOOST_COMPILER "GNU C++ version " __VERSION__
303	#endif
304
305	// ConceptGCC compiler:
306	// http://www.generic-programming.org/software/ConceptGCC/
307	#ifdef __GXX_CONCEPTS__
308	# define BOOST_HAS_CONCEPTS
309	# define BOOST_COMPILER "ConceptGCC version " __VERSION__
310	#endif
311
312	// versions check:
313	// we don't know gcc prior to version 3.30:
314	#if (BOOST_GCC_VERSION< 30300)
315	# error "Compiler not configured - please reconfigure"
316	#endif
317	//
318	// last known and checked version is 4.9:
319	#if (BOOST_GCC_VERSION > 40900)
320	# if defined(BOOST_ASSERT_CONFIG)
321	# error "Unknown compiler version - please run the configure tests and report the results"
322	# else
323	// we don't emit warnings here anymore since there are no defect macros defined for
324	// gcc post 3.4, so any failures are gcc regressions...
325	//# warning "Unknown compiler version - please run the configure tests and report the results"
326	# endif
327	#endif
328