Update to boost 1.68

[features.git] / 3rdparty / boost / boost / config / compiler / clang.hpp

diff --git a/3rdparty/boost/boost/config/compiler/clang.hpp b/3rdparty/boost/boost/config/compiler/clang.hpp
index 150e3c0d521bb00b0f8b315005deffec21021519..3d893c689ae66ca941f1aa780d5c929233d58343 100644 (file)
--- a/3rdparty/boost/boost/config/compiler/clang.hpp
+++ b/3rdparty/boost/boost/config/compiler/clang.hpp
@@ -27,6 +27,10 @@
 #define __has_attribute(x) 0
 #endif
 
+#ifndef __has_cpp_attribute
+#define __has_cpp_attribute(x) 0
+#endif
+
 #if !__has_feature(cxx_exceptions) && !defined(BOOST_NO_EXCEPTIONS)
 #  define BOOST_NO_EXCEPTIONS
 #endif
@@ -57,7 +61,7 @@
 #define BOOST_HAS_NRVO
 
 // Branch prediction hints
-#if defined(__has_builtin)
+#if !defined (__c2__) && defined(__has_builtin)
 #if __has_builtin(__builtin_expect)
 #define BOOST_LIKELY(x) __builtin_expect(x, 1)
 #define BOOST_UNLIKELY(x) __builtin_expect(x, 0)
@@ -94,11 +98,15 @@
 //
 // Dynamic shared object (DSO) and dynamic-link library (DLL) support
 //
-#if !defined(_WIN32) && !defined(__WIN32__) && !defined(WIN32)
+#if defined(_WIN32) || defined(__WIN32__) || defined(WIN32) || defined(__CYGWIN__)
+#  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
-#  define BOOST_SYMBOL_VISIBLE __attribute__((__visibility__("default")))
 #endif
+#define BOOST_SYMBOL_VISIBLE __attribute__((__visibility__("default")))
 
 //
 // The BOOST_FALLTHROUGH macro can be used to annotate implicit fall-through
@@ -282,6 +290,24 @@
 #  define BOOST_NO_CXX14_VARIABLE_TEMPLATES
 #endif
 
+#if !defined(__cpp_structured_bindings) || (__cpp_structured_bindings < 201606)
+#  define BOOST_NO_CXX17_STRUCTURED_BINDINGS
+#endif
+
+#if !defined(__cpp_if_constexpr) || (__cpp_if_constexpr < 201606)
+#  define BOOST_NO_CXX17_IF_CONSTEXPR
+#endif
+
+// Clang 3.9+ in c++1z
+#if !__has_cpp_attribute(fallthrough) || __cplusplus < 201406L
+#  define BOOST_NO_CXX17_INLINE_VARIABLES
+#  define BOOST_NO_CXX17_FOLD_EXPRESSIONS
+#endif
+
+#if __cplusplus < 201103L
+#define BOOST_NO_CXX11_SFINAE_EXPR
+#endif
+
 #if __cplusplus < 201400
 // All versions with __cplusplus above this value seem to support this:
 #  define BOOST_NO_CXX14_DIGIT_SEPARATORS
@@ -292,9 +318,19 @@
 #define BOOST_UNREACHABLE_RETURN(x) __builtin_unreachable();
 #endif
 
+#if (__clang_major__ == 3) && (__clang_minor__ == 0)
+// Apparently a clang bug:
+#  define BOOST_NO_CXX11_FIXED_LENGTH_VARIADIC_TEMPLATE_EXPANSION_PACKS
+#endif
+
 // Clang has supported the 'unused' attribute since the first release.
 #define BOOST_ATTRIBUTE_UNUSED __attribute__((__unused__))
 
+// Type aliasing hint.
+#if __has_attribute(__may_alias__)
+#  define BOOST_MAY_ALIAS __attribute__((__may_alias__))
+#endif
+
 #ifndef BOOST_COMPILER
 #  define BOOST_COMPILER "Clang version " __clang_version__
 #endif