Chris@16: // (C) Copyright Douglas Gregor 2010
Chris@16: //
Chris@16: //  Use, modification and distribution are subject to the
Chris@16: //  Boost Software License, Version 1.0. (See accompanying file
Chris@16: //  LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
Chris@16: 
Chris@16: //  See http://www.boost.org for most recent version.
Chris@16: 
Chris@16: // Clang compiler setup.
Chris@16: 
Chris@16: #define BOOST_HAS_PRAGMA_ONCE
Chris@16: 
Chris@101: // Detecting `-fms-extension` compiler flag assuming that _MSC_VER defined when that flag is used.
Chris@101: #if defined (_MSC_VER) && (__clang_major__ > 3 || (__clang_major__ == 3 && __clang_minor__ >= 4))
Chris@101: #   define BOOST_HAS_PRAGMA_DETECT_MISMATCH
Chris@101: #endif
Chris@101: 
Chris@101: // When compiling with clang before __has_extension was defined,
Chris@101: // even if one writes 'defined(__has_extension) && __has_extension(xxx)',
Chris@101: // clang reports a compiler error. So the only workaround found is:
Chris@101: 
Chris@101: #ifndef __has_extension
Chris@101: #define __has_extension __has_feature
Chris@101: #endif
Chris@101: 
Chris@16: #if !__has_feature(cxx_exceptions) && !defined(BOOST_NO_EXCEPTIONS)
Chris@16: #  define BOOST_NO_EXCEPTIONS
Chris@16: #endif
Chris@16: 
Chris@16: #if !__has_feature(cxx_rtti) && !defined(BOOST_NO_RTTI)
Chris@16: #  define BOOST_NO_RTTI
Chris@16: #endif
Chris@16: 
Chris@16: #if !__has_feature(cxx_rtti) && !defined(BOOST_NO_TYPEID)
Chris@16: #  define BOOST_NO_TYPEID
Chris@16: #endif
Chris@16: 
Chris@16: #if defined(__int64) && !defined(__GNUC__)
Chris@16: #  define BOOST_HAS_MS_INT64
Chris@16: #endif
Chris@16: 
Chris@16: #define BOOST_HAS_NRVO
Chris@16: 
Chris@16: // Branch prediction hints
Chris@16: #if defined(__has_builtin)
Chris@16: #if __has_builtin(__builtin_expect)
Chris@16: #define BOOST_LIKELY(x) __builtin_expect(x, 1)
Chris@16: #define BOOST_UNLIKELY(x) __builtin_expect(x, 0)
Chris@16: #endif
Chris@16: #endif
Chris@16: 
Chris@16: // Clang supports "long long" in all compilation modes.
Chris@16: #define BOOST_HAS_LONG_LONG
Chris@16: 
Chris@16: //
Chris@101: // We disable this if the compiler is really nvcc as it
Chris@101: // doesn't actually support __int128 as of CUDA_VERSION=5000
Chris@101: // even though it defines __SIZEOF_INT128__.
Chris@101: // See https://svn.boost.org/trac/boost/ticket/10418
Chris@101: // Only re-enable this for nvcc if you're absolutely sure
Chris@101: // of the circumstances under which it's supported:
Chris@101: //
Chris@101: #if defined(__SIZEOF_INT128__) && !defined(__CUDACC__)
Chris@101: #  define BOOST_HAS_INT128
Chris@101: #endif
Chris@101: 
Chris@101: 
Chris@101: //
Chris@16: // Dynamic shared object (DSO) and dynamic-link library (DLL) support
Chris@16: //
Chris@16: #if !defined(_WIN32) && !defined(__WIN32__) && !defined(WIN32)
Chris@16: #  define BOOST_SYMBOL_EXPORT __attribute__((__visibility__("default")))
Chris@16: #  define BOOST_SYMBOL_IMPORT
Chris@16: #  define BOOST_SYMBOL_VISIBLE __attribute__((__visibility__("default")))
Chris@16: #endif
Chris@16: 
Chris@16: //
Chris@16: // The BOOST_FALLTHROUGH macro can be used to annotate implicit fall-through
Chris@16: // between switch labels.
Chris@16: //
Chris@16: #if __cplusplus >= 201103L && defined(__has_warning)
Chris@16: #  if __has_feature(cxx_attributes) && __has_warning("-Wimplicit-fallthrough")
Chris@16: #    define BOOST_FALLTHROUGH [[clang::fallthrough]]
Chris@16: #  endif
Chris@16: #endif
Chris@16: 
Chris@16: #if !__has_feature(cxx_auto_type)
Chris@16: #  define BOOST_NO_CXX11_AUTO_DECLARATIONS
Chris@16: #  define BOOST_NO_CXX11_AUTO_MULTIDECLARATIONS
Chris@16: #endif
Chris@16: 
Chris@101: //
Chris@101: // Currently clang on Windows using VC++ RTL does not support C++11's char16_t or char32_t
Chris@101: //
Chris@101: #if defined(_MSC_VER) || !(defined(__GXX_EXPERIMENTAL_CXX0X__) || __cplusplus >= 201103L)
Chris@16: #  define BOOST_NO_CXX11_CHAR16_T
Chris@16: #  define BOOST_NO_CXX11_CHAR32_T
Chris@16: #endif
Chris@16: 
Chris@16: #if !__has_feature(cxx_constexpr)
Chris@16: #  define BOOST_NO_CXX11_CONSTEXPR
Chris@16: #endif
Chris@16: 
Chris@16: #if !__has_feature(cxx_decltype)
Chris@16: #  define BOOST_NO_CXX11_DECLTYPE
Chris@16: #endif
Chris@16: 
Chris@16: #if !__has_feature(cxx_decltype_incomplete_return_types)
Chris@16: #  define BOOST_NO_CXX11_DECLTYPE_N3276
Chris@16: #endif
Chris@16: 
Chris@16: #if !__has_feature(cxx_defaulted_functions)
Chris@16: #  define BOOST_NO_CXX11_DEFAULTED_FUNCTIONS
Chris@16: #endif
Chris@16: 
Chris@16: #if !__has_feature(cxx_deleted_functions)
Chris@16: #  define BOOST_NO_CXX11_DELETED_FUNCTIONS
Chris@16: #endif
Chris@16: 
Chris@16: #if !__has_feature(cxx_explicit_conversions)
Chris@16: #  define BOOST_NO_CXX11_EXPLICIT_CONVERSION_OPERATORS
Chris@16: #endif
Chris@16: 
Chris@16: #if !__has_feature(cxx_default_function_template_args)
Chris@16: #  define BOOST_NO_CXX11_FUNCTION_TEMPLATE_DEFAULT_ARGS
Chris@16: #endif
Chris@16: 
Chris@16: #if !__has_feature(cxx_generalized_initializers)
Chris@16: #  define BOOST_NO_CXX11_HDR_INITIALIZER_LIST
Chris@16: #endif
Chris@16: 
Chris@16: #if !__has_feature(cxx_lambdas)
Chris@16: #  define BOOST_NO_CXX11_LAMBDAS
Chris@16: #endif
Chris@16: 
Chris@16: #if !__has_feature(cxx_local_type_template_args)
Chris@16: #  define BOOST_NO_CXX11_LOCAL_CLASS_TEMPLATE_PARAMETERS
Chris@16: #endif
Chris@16: 
Chris@16: #if !__has_feature(cxx_noexcept)
Chris@16: #  define BOOST_NO_CXX11_NOEXCEPT
Chris@16: #endif
Chris@16: 
Chris@16: #if !__has_feature(cxx_nullptr)
Chris@16: #  define BOOST_NO_CXX11_NULLPTR
Chris@16: #endif
Chris@16: 
Chris@16: #if !__has_feature(cxx_range_for)
Chris@16: #  define BOOST_NO_CXX11_RANGE_BASED_FOR
Chris@16: #endif
Chris@16: 
Chris@16: #if !__has_feature(cxx_raw_string_literals)
Chris@16: #  define BOOST_NO_CXX11_RAW_LITERALS
Chris@16: #endif
Chris@16: 
Chris@101: #if !__has_feature(cxx_reference_qualified_functions)
Chris@101: #  define BOOST_NO_CXX11_REF_QUALIFIERS
Chris@101: #endif
Chris@101: 
Chris@16: #if !__has_feature(cxx_generalized_initializers)
Chris@16: #  define BOOST_NO_CXX11_UNIFIED_INITIALIZATION_SYNTAX
Chris@16: #endif
Chris@16: 
Chris@16: #if !__has_feature(cxx_rvalue_references)
Chris@16: #  define BOOST_NO_CXX11_RVALUE_REFERENCES
Chris@16: #endif
Chris@16: 
Chris@16: #if !__has_feature(cxx_strong_enums)
Chris@16: #  define BOOST_NO_CXX11_SCOPED_ENUMS
Chris@16: #endif
Chris@16: 
Chris@16: #if !__has_feature(cxx_static_assert)
Chris@16: #  define BOOST_NO_CXX11_STATIC_ASSERT
Chris@16: #endif
Chris@16: 
Chris@16: #if !__has_feature(cxx_alias_templates)
Chris@16: #  define BOOST_NO_CXX11_TEMPLATE_ALIASES
Chris@16: #endif
Chris@16: 
Chris@16: #if !__has_feature(cxx_unicode_literals)
Chris@16: #  define BOOST_NO_CXX11_UNICODE_LITERALS
Chris@16: #endif
Chris@16: 
Chris@16: #if !__has_feature(cxx_variadic_templates)
Chris@16: #  define BOOST_NO_CXX11_VARIADIC_TEMPLATES
Chris@16: #endif
Chris@16: 
Chris@16: #if !__has_feature(cxx_user_literals)
Chris@16: #  define BOOST_NO_CXX11_USER_DEFINED_LITERALS
Chris@16: #endif
Chris@16: 
Chris@101: #if !__has_feature(cxx_alignas)
Chris@16: #  define BOOST_NO_CXX11_ALIGNAS
Chris@16: #endif
Chris@16: 
Chris@16: #if !__has_feature(cxx_trailing_return)
Chris@16: #  define BOOST_NO_CXX11_TRAILING_RESULT_TYPES
Chris@16: #endif
Chris@16: 
Chris@16: #if !__has_feature(cxx_inline_namespaces)
Chris@16: #  define BOOST_NO_CXX11_INLINE_NAMESPACES
Chris@16: #endif
Chris@16: 
Chris@101: #if !__has_feature(cxx_override_control)
Chris@101: #  define BOOST_NO_CXX11_FINAL
Chris@101: #endif
Chris@101: 
Chris@101: #if !(__has_feature(__cxx_binary_literals__) || __has_extension(__cxx_binary_literals__))
Chris@101: #  define BOOST_NO_CXX14_BINARY_LITERALS
Chris@101: #endif
Chris@101: 
Chris@101: #if !__has_feature(__cxx_decltype_auto__)
Chris@101: #  define BOOST_NO_CXX14_DECLTYPE_AUTO
Chris@101: #endif
Chris@101: 
Chris@101: #if !__has_feature(__cxx_aggregate_nsdmi__)
Chris@101: #  define BOOST_NO_CXX14_AGGREGATE_NSDMI
Chris@101: #endif
Chris@101: 
Chris@101: #if !__has_feature(__cxx_init_captures__)
Chris@101: #  define BOOST_NO_CXX14_INITIALIZED_LAMBDA_CAPTURES
Chris@101: #endif
Chris@101: 
Chris@101: #if !__has_feature(__cxx_generic_lambdas__)
Chris@101: #  define BOOST_NO_CXX14_GENERIC_LAMBDAS
Chris@101: #endif
Chris@101: 
Chris@101: // clang < 3.5 has a defect with dependent type, like following.
Chris@101: //
Chris@101: //  template <class T>
Chris@101: //  constexpr typename enable_if<pred<T> >::type foo(T &)
Chris@101: //  { } // error: no return statement in constexpr function
Chris@101: //
Chris@101: // This issue also affects C++11 mode, but C++11 constexpr requires return stmt.
Chris@101: // Therefore we don't care such case.
Chris@101: //
Chris@101: // Note that we can't check Clang version directly as the numbering system changes depending who's
Chris@101: // creating the Clang release (see https://github.com/boostorg/config/pull/39#issuecomment-59927873)
Chris@101: // so instead verify that we have a feature that was introduced at the same time as working C++14
Chris@101: // constexpr (generic lambda's in this case):
Chris@101: //
Chris@101: #if !__has_feature(__cxx_generic_lambdas__) || !__has_feature(__cxx_relaxed_constexpr__)
Chris@101: #  define BOOST_NO_CXX14_CONSTEXPR
Chris@101: #endif
Chris@101: 
Chris@101: #if !__has_feature(__cxx_return_type_deduction__)
Chris@101: #  define BOOST_NO_CXX14_RETURN_TYPE_DEDUCTION
Chris@101: #endif
Chris@101: 
Chris@101: #if !__has_feature(__cxx_variable_templates__)
Chris@101: #  define BOOST_NO_CXX14_VARIABLE_TEMPLATES
Chris@101: #endif
Chris@101: 
Chris@101: #if __cplusplus < 201400
Chris@101: // All versions with __cplusplus above this value seem to support this:
Chris@101: #  define BOOST_NO_CXX14_DIGIT_SEPARATORS
Chris@101: #endif
Chris@101: 
Chris@101: 
Chris@101: // Unused attribute:
Chris@101: #if defined(__GNUC__) && (__GNUC__ >= 4)
Chris@101: #  define BOOST_ATTRIBUTE_UNUSED __attribute__((unused))
Chris@101: #endif
Chris@16: 
Chris@16: #ifndef BOOST_COMPILER
Chris@16: #  define BOOST_COMPILER "Clang version " __clang_version__
Chris@16: #endif
Chris@16: 
Chris@16: // Macro used to identify the Clang compiler.
Chris@16: #define BOOST_CLANG 1
Chris@16: