boost/config/compiler/clang.hpp
// (C) Copyright Douglas Gregor 2010 // // 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. // Clang compiler setup. #define BOOST_HAS_PRAGMA_ONCE // When compiling with clang before __has_extension was defined, // even if one writes 'defined(__has_extension) && __has_extension(xxx)', // clang reports a compiler error. So the only workaround found is: #ifndef __has_extension #define __has_extension __has_feature #endif #if !__has_feature(cxx_exceptions) && !defined(BOOST_NO_EXCEPTIONS) # define BOOST_NO_EXCEPTIONS #endif #if !__has_feature(cxx_rtti) && !defined(BOOST_NO_RTTI) # define BOOST_NO_RTTI #endif #if !__has_feature(cxx_rtti) && !defined(BOOST_NO_TYPEID) # define BOOST_NO_TYPEID #endif #if defined(__int64) && !defined(__GNUC__) # define BOOST_HAS_MS_INT64 #endif #define BOOST_HAS_NRVO // Branch prediction hints #if defined(__has_builtin) #if __has_builtin(__builtin_expect) #define BOOST_LIKELY(x) __builtin_expect(x, 1) #define BOOST_UNLIKELY(x) __builtin_expect(x, 0) #endif #endif // Clang supports "long long" in all compilation modes. #define BOOST_HAS_LONG_LONG #if defined(__SIZEOF_INT128__) # define BOOST_HAS_INT128 #endif // // Dynamic shared object (DSO) and dynamic-link library (DLL) support // #if !defined(_WIN32) && !defined(__WIN32__) && !defined(WIN32) # define BOOST_SYMBOL_EXPORT __attribute__((__visibility__("default"))) # define BOOST_SYMBOL_IMPORT # define BOOST_SYMBOL_VISIBLE __attribute__((__visibility__("default"))) #endif // // The BOOST_FALLTHROUGH macro can be used to annotate implicit fall-through // between switch labels. // #if __cplusplus >= 201103L && defined(__has_warning) # if __has_feature(cxx_attributes) && __has_warning("-Wimplicit-fallthrough") # define BOOST_FALLTHROUGH [[clang::fallthrough]] # endif #endif #if !__has_feature(cxx_auto_type) # define BOOST_NO_CXX11_AUTO_DECLARATIONS # define BOOST_NO_CXX11_AUTO_MULTIDECLARATIONS #endif // // Currently clang on Windows using VC++ RTL does not support C++11's char16_t or char32_t // #if defined(_MSC_VER) || !(defined(__GXX_EXPERIMENTAL_CXX0X__) || __cplusplus >= 201103L) # define BOOST_NO_CXX11_CHAR16_T # define BOOST_NO_CXX11_CHAR32_T #endif #if !__has_feature(cxx_constexpr) # define BOOST_NO_CXX11_CONSTEXPR #endif #if !__has_feature(cxx_decltype) # define BOOST_NO_CXX11_DECLTYPE #endif #if !__has_feature(cxx_decltype_incomplete_return_types) # define BOOST_NO_CXX11_DECLTYPE_N3276 #endif #if !__has_feature(cxx_defaulted_functions) # define BOOST_NO_CXX11_DEFAULTED_FUNCTIONS #endif #if !__has_feature(cxx_deleted_functions) # define BOOST_NO_CXX11_DELETED_FUNCTIONS #endif #if !__has_feature(cxx_explicit_conversions) # define BOOST_NO_CXX11_EXPLICIT_CONVERSION_OPERATORS #endif #if !__has_feature(cxx_default_function_template_args) # define BOOST_NO_CXX11_FUNCTION_TEMPLATE_DEFAULT_ARGS #endif #if !__has_feature(cxx_generalized_initializers) # define BOOST_NO_CXX11_HDR_INITIALIZER_LIST #endif #if !__has_feature(cxx_lambdas) # define BOOST_NO_CXX11_LAMBDAS #endif #if !__has_feature(cxx_local_type_template_args) # define BOOST_NO_CXX11_LOCAL_CLASS_TEMPLATE_PARAMETERS #endif #if !__has_feature(cxx_noexcept) # define BOOST_NO_CXX11_NOEXCEPT #endif #if !__has_feature(cxx_nullptr) # define BOOST_NO_CXX11_NULLPTR #endif #if !__has_feature(cxx_range_for) # define BOOST_NO_CXX11_RANGE_BASED_FOR #endif #if !__has_feature(cxx_raw_string_literals) # define BOOST_NO_CXX11_RAW_LITERALS #endif #if !__has_feature(cxx_reference_qualified_functions) # define BOOST_NO_CXX11_REF_QUALIFIERS #endif #if !__has_feature(cxx_generalized_initializers) # define BOOST_NO_CXX11_UNIFIED_INITIALIZATION_SYNTAX #endif #if !__has_feature(cxx_rvalue_references) # define BOOST_NO_CXX11_RVALUE_REFERENCES #endif #if !__has_feature(cxx_strong_enums) # define BOOST_NO_CXX11_SCOPED_ENUMS #endif #if !__has_feature(cxx_static_assert) # define BOOST_NO_CXX11_STATIC_ASSERT #endif #if !__has_feature(cxx_alias_templates) # define BOOST_NO_CXX11_TEMPLATE_ALIASES #endif #if !__has_feature(cxx_unicode_literals) # define BOOST_NO_CXX11_UNICODE_LITERALS #endif #if !__has_feature(cxx_variadic_templates) # define BOOST_NO_CXX11_VARIADIC_TEMPLATES #endif #if !__has_feature(cxx_user_literals) # define BOOST_NO_CXX11_USER_DEFINED_LITERALS #endif #if !(__has_feature(cxx_alignas) || __has_extension(cxx_alignas)) # define BOOST_NO_CXX11_ALIGNAS #endif #if !__has_feature(cxx_trailing_return) # define BOOST_NO_CXX11_TRAILING_RESULT_TYPES #endif #if !__has_feature(cxx_inline_namespaces) # define BOOST_NO_CXX11_INLINE_NAMESPACES #endif // Clang always supports variadic macros // Clang always supports extern templates #ifndef BOOST_COMPILER # define BOOST_COMPILER "Clang version " __clang_version__ #endif // Macro used to identify the Clang compiler. #define BOOST_CLANG 1