ceph/src/boost/boost/config/compiler/xlcpp.hpp

   1 // (C) Copyright Douglas Gregor 2010
   2 //
   3 //  Use, modification and distribution are subject to the
   4 //  Boost Software License, Version 1.0. (See accompanying file
   5 //  LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
   6
   7 //  See http://www.boost.org for most recent version.
   8
   9 //  compiler setup for IBM XL C/C++ for Linux (Little Endian) based on clang.
  10
  11 #define BOOST_HAS_PRAGMA_ONCE
  12
  13 // Detecting `-fms-extension` compiler flag assuming that _MSC_VER defined when that flag is used.
  14 #if defined (_MSC_VER) && (__clang_major__ > 3 || (__clang_major__ == 3 && __clang_minor__ >= 4))
  15 #   define BOOST_HAS_PRAGMA_DETECT_MISMATCH
  16 #endif
  17
  18 // When compiling with clang before __has_extension was defined,
  19 // even if one writes 'defined(__has_extension) && __has_extension(xxx)',
  20 // clang reports a compiler error. So the only workaround found is:
  21
  22 #ifndef __has_extension
  23 #define __has_extension __has_feature
  24 #endif
  25
  26 #ifndef __has_cpp_attribute
  27 #define __has_cpp_attribute(x) 0
  28 #endif
  29
  30 #if !__has_feature(cxx_exceptions) && !defined(BOOST_NO_EXCEPTIONS)
  31 #  define BOOST_NO_EXCEPTIONS
  32 #endif
  33
  34 #if !__has_feature(cxx_rtti) && !defined(BOOST_NO_RTTI)
  35 #  define BOOST_NO_RTTI
  36 #endif
  37
  38 #if !__has_feature(cxx_rtti) && !defined(BOOST_NO_TYPEID)
  39 #  define BOOST_NO_TYPEID
  40 #endif
  41
  42 #if defined(__int64) && !defined(__GNUC__)
  43 #  define BOOST_HAS_MS_INT64
  44 #endif
  45
  46 #define BOOST_HAS_NRVO
  47
  48 // Branch prediction hints
  49 #if defined(__has_builtin)
  50 #if __has_builtin(__builtin_expect)
  51 #define BOOST_LIKELY(x) __builtin_expect(x, 1)
  52 #define BOOST_UNLIKELY(x) __builtin_expect(x, 0)
  53 #endif
  54 #endif
  55
  56 // Clang supports "long long" in all compilation modes.
  57 #define BOOST_HAS_LONG_LONG
  58
  59 //
  60 // Dynamic shared object (DSO) and dynamic-link library (DLL) support
  61 //
  62 #if !defined(_WIN32) && !defined(__WIN32__) && !defined(WIN32)
  63 #  define BOOST_SYMBOL_EXPORT __attribute__((__visibility__("default")))
  64 #  define BOOST_SYMBOL_IMPORT
  65 #  define BOOST_SYMBOL_VISIBLE __attribute__((__visibility__("default")))
  66 #endif
  67
  68 //
  69 // The BOOST_FALLTHROUGH macro can be used to annotate implicit fall-through
  70 // between switch labels.
  71 //
  72 #if __cplusplus >= 201103L && defined(__has_warning)
  73 #  if __has_feature(cxx_attributes) && __has_warning("-Wimplicit-fallthrough")
  74 #    define BOOST_FALLTHROUGH [[clang::fallthrough]]
  75 #  endif
  76 #endif
  77
  78 #if !__has_feature(cxx_auto_type)
  79 #  define BOOST_NO_CXX11_AUTO_DECLARATIONS
  80 #  define BOOST_NO_CXX11_AUTO_MULTIDECLARATIONS
  81 #endif
  82
  83 //
  84 // Currently clang on Windows using VC++ RTL does not support C++11's char16_t or char32_t
  85 //
  86 #if defined(_MSC_VER) || !(defined(__GXX_EXPERIMENTAL_CXX0X__) || __cplusplus >= 201103L)
  87 #  define BOOST_NO_CXX11_CHAR16_T
  88 #  define BOOST_NO_CXX11_CHAR32_T
  89 #endif
  90
  91 #if !__has_feature(cxx_constexpr)
  92 #  define BOOST_NO_CXX11_CONSTEXPR
  93 #endif
  94
  95 #if !__has_feature(cxx_decltype)
  96 #  define BOOST_NO_CXX11_DECLTYPE
  97 #endif
  98
  99 #if !__has_feature(cxx_decltype_incomplete_return_types)
 100 #  define BOOST_NO_CXX11_DECLTYPE_N3276
 101 #endif
 102
 103 #if !__has_feature(cxx_defaulted_functions)
 104 #  define BOOST_NO_CXX11_DEFAULTED_FUNCTIONS
 105 #endif
 106
 107 #if !__has_feature(cxx_deleted_functions)
 108 #  define BOOST_NO_CXX11_DELETED_FUNCTIONS
 109 #endif
 110
 111 #if !__has_feature(cxx_explicit_conversions)
 112 #  define BOOST_NO_CXX11_EXPLICIT_CONVERSION_OPERATORS
 113 #endif
 114
 115 #if !__has_feature(cxx_default_function_template_args)
 116 #  define BOOST_NO_CXX11_FUNCTION_TEMPLATE_DEFAULT_ARGS
 117 #endif
 118
 119 #if !__has_feature(cxx_generalized_initializers)
 120 #  define BOOST_NO_CXX11_HDR_INITIALIZER_LIST
 121 #endif
 122
 123 #if !__has_feature(cxx_lambdas)
 124 #  define BOOST_NO_CXX11_LAMBDAS
 125 #endif
 126
 127 #if !__has_feature(cxx_local_type_template_args)
 128 #  define BOOST_NO_CXX11_LOCAL_CLASS_TEMPLATE_PARAMETERS
 129 #endif
 130
 131 #if !__has_feature(cxx_noexcept)
 132 #  define BOOST_NO_CXX11_NOEXCEPT
 133 #endif
 134
 135 #if !__has_feature(cxx_nullptr)
 136 #  define BOOST_NO_CXX11_NULLPTR
 137 #endif
 138
 139 #if !__has_feature(cxx_range_for)
 140 #  define BOOST_NO_CXX11_RANGE_BASED_FOR
 141 #endif
 142
 143 #if !__has_feature(cxx_raw_string_literals)
 144 #  define BOOST_NO_CXX11_RAW_LITERALS
 145 #endif
 146
 147 #if !__has_feature(cxx_reference_qualified_functions)
 148 #  define BOOST_NO_CXX11_REF_QUALIFIERS
 149 #endif
 150
 151 #if !__has_feature(cxx_generalized_initializers)
 152 #  define BOOST_NO_CXX11_UNIFIED_INITIALIZATION_SYNTAX
 153 #endif
 154
 155 #if !__has_feature(cxx_rvalue_references)
 156 #  define BOOST_NO_CXX11_RVALUE_REFERENCES
 157 #endif
 158
 159 #if !__has_feature(cxx_strong_enums)
 160 #  define BOOST_NO_CXX11_SCOPED_ENUMS
 161 #endif
 162
 163 #if !__has_feature(cxx_static_assert)
 164 #  define BOOST_NO_CXX11_STATIC_ASSERT
 165 #endif
 166
 167 #if !__has_feature(cxx_alias_templates)
 168 #  define BOOST_NO_CXX11_TEMPLATE_ALIASES
 169 #endif
 170
 171 #if !__has_feature(cxx_unicode_literals)
 172 #  define BOOST_NO_CXX11_UNICODE_LITERALS
 173 #endif
 174
 175 #if !__has_feature(cxx_variadic_templates)
 176 #  define BOOST_NO_CXX11_VARIADIC_TEMPLATES
 177 #endif
 178
 179 #if !__has_feature(cxx_user_literals)
 180 #  define BOOST_NO_CXX11_USER_DEFINED_LITERALS
 181 #endif
 182
 183 #if !__has_feature(cxx_alignas)
 184 #  define BOOST_NO_CXX11_ALIGNAS
 185 #endif
 186
 187 #if !__has_feature(cxx_trailing_return)
 188 #  define BOOST_NO_CXX11_TRAILING_RESULT_TYPES
 189 #endif
 190
 191 #if !__has_feature(cxx_inline_namespaces)
 192 #  define BOOST_NO_CXX11_INLINE_NAMESPACES
 193 #endif
 194
 195 #if !__has_feature(cxx_override_control)
 196 #  define BOOST_NO_CXX11_FINAL
 197 #endif
 198
 199 #if !(__has_feature(__cxx_binary_literals__) || __has_extension(__cxx_binary_literals__))
 200 #  define BOOST_NO_CXX14_BINARY_LITERALS
 201 #endif
 202
 203 #if !__has_feature(__cxx_decltype_auto__)
 204 #  define BOOST_NO_CXX14_DECLTYPE_AUTO
 205 #endif
 206
 207 #if !__has_feature(__cxx_aggregate_nsdmi__)
 208 #  define BOOST_NO_CXX14_AGGREGATE_NSDMI
 209 #endif
 210
 211 #if !__has_feature(__cxx_init_captures__)
 212 #  define BOOST_NO_CXX14_INITIALIZED_LAMBDA_CAPTURES
 213 #endif
 214
 215 #if !__has_feature(__cxx_generic_lambdas__)
 216 #  define BOOST_NO_CXX14_GENERIC_LAMBDAS
 217 #endif
 218
 219 // clang < 3.5 has a defect with dependent type, like following.
 220 //
 221 //  template <class T>
 222 //  constexpr typename enable_if<pred<T> >::type foo(T &)
 223 //  { } // error: no return statement in constexpr function
 224 //
 225 // This issue also affects C++11 mode, but C++11 constexpr requires return stmt.
 226 // Therefore we don't care such case.
 227 //
 228 // Note that we can't check Clang version directly as the numbering system changes depending who's
 229 // creating the Clang release (see https://github.com/boostorg/config/pull/39#issuecomment-59927873)
 230 // so instead verify that we have a feature that was introduced at the same time as working C++14
 231 // constexpr (generic lambda's in this case):
 232 //
 233 #if !__has_feature(__cxx_generic_lambdas__) || !__has_feature(__cxx_relaxed_constexpr__)
 234 #  define BOOST_NO_CXX14_CONSTEXPR
 235 #endif
 236
 237 #if !__has_feature(__cxx_return_type_deduction__)
 238 #  define BOOST_NO_CXX14_RETURN_TYPE_DEDUCTION
 239 #endif
 240
 241 #if !__has_feature(__cxx_variable_templates__)
 242 #  define BOOST_NO_CXX14_VARIABLE_TEMPLATES
 243 #endif
 244
 245 #if !defined(__cpp_structured_bindings) || (__cpp_structured_bindings < 201606)
 246 #  define BOOST_NO_CXX17_STRUCTURED_BINDINGS
 247 #endif
 248
 249 #if !defined(__cpp_if_constexpr) || (__cpp_if_constexpr < 201606)
 250 #  define BOOST_NO_CXX17_IF_CONSTEXPR
 251 #endif
 252
 253 // Clang 3.9+ in c++1z
 254 #if !__has_cpp_attribute(fallthrough) || __cplusplus < 201406L
 255 #  define BOOST_NO_CXX17_INLINE_VARIABLES
 256 #  define BOOST_NO_CXX17_FOLD_EXPRESSIONS
 257 #endif
 258
 259 #if !__has_feature(cxx_thread_local)
 260 #  define BOOST_NO_CXX11_THREAD_LOCAL
 261 #endif
 262
 263 #if __cplusplus < 201400
 264 // All versions with __cplusplus above this value seem to support this:
 265 #  define BOOST_NO_CXX14_DIGIT_SEPARATORS
 266 #endif
 267
 268
 269 // Unused attribute:
 270 #if defined(__GNUC__) && (__GNUC__ >= 4)
 271 #  define BOOST_ATTRIBUTE_UNUSED __attribute__((unused))
 272 #endif
 273
 274 // Type aliasing hint.
 275 #if __has_attribute(__may_alias__)
 276 #  define BOOST_MAY_ALIAS __attribute__((__may_alias__))
 277 #endif
 278
 279 #ifndef BOOST_COMPILER
 280 #  define BOOST_COMPILER "Clang version " __clang_version__
 281 #endif
 282
 283 // Macro used to identify the Clang compiler.
 284 #define BOOST_CLANG 1
 285