Compiler configuration logic for Clang.

[SVN r61626]

include/boost/config/compiler/clang.hpp

@@ -0,0 +1,65 @@
+// (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.
+
+#if __has_feature(cxx_exceptions)
+#else
+#  define BOOST_NO_EXCEPTIONS
+#endif
+
+#if __has_feature(cxx_rtti)
+#else
+#  define BOOST_NO_RTTI
+#endif
+
+#if defined(__int32)
+// HACK: Clang only defines the type __int32 in Microsoft-compatibility mode,
+// which means that declspecs are also available
+#  define BOOST_HAS_DECLSPEC
+#endif
+
+#if defined(__int64)
+#  define BOOST_HAS_MS_INT64
+#endif
+
+// NOTE: Clang does not yet support NRVO.
+
+// NOTE: Clang's C++0x support is not worth detecting. However, it
+// supports both extern templates and "long long" even in C++98/03
+// mode.
+#define BOOST_NO_AUTO_DECLARATIONS
+#define BOOST_NO_AUTO_MULTIDECLARATIONS
+#define BOOST_NO_CHAR16_T
+#define BOOST_NO_CHAR32_T
+#define BOOST_NO_CONCEPTS
+#define BOOST_NO_CONSTEXPR
+#define BOOST_NO_DECLTYPE
+#define BOOST_NO_DEFAULTED_FUNCTIONS
+#define BOOST_NO_DELETED_FUNCTIONS
+#define BOOST_NO_EXPLICIT_CONVERSION_OPERATORS
+#define BOOST_NO_FUNCTION_TEMPLATE_DEFAULT_ARGS
+#define BOOST_NO_INITIALIZER_LISTS
+#define BOOST_NO_LAMBDAS
+#define BOOST_NO_NULLPTR
+#define BOOST_NO_RAW_LITERALS
+#define BOOST_NO_RVALUE_REFERENCES
+#define BOOST_NO_SCOPED_ENUMS
+#define BOOST_NO_STATIC_ASSERT
+#define BOOST_NO_TEMPLATE_ALIASES
+#define BOOST_NO_UNICODE_LITERALS
+#define BOOST_NO_VARIADIC_TEMPLATES
+
+// HACK: Clang does support extern templates, but Boost's test for
+// them is wrong.
+#define BOOST_NO_EXTERN_TEMPLATE
+
+#ifndef BOOST_COMPILER
+// NOTE: Clang does not expose a version number
+#  define BOOST_COMPILER "Clang C++"
+#endif

include/boost/config/select_compiler_config.hpp

@@ -15,6 +15,7 @@
 // compilers we support:
 
 #   define BOOST_CXX_GCCXML   0
+#   define BOOST_CXX_CLANG    0
 #   define BOOST_CXX_COMO     0
 #   define BOOST_CXX_DMC      0
 #   define BOOST_CXX_INTEL    0
@@ -49,6 +50,10 @@
 //  Comeau C++
 #   define BOOST_COMPILER_CONFIG "boost/config/compiler/comeau.hpp"
 
+#elif defined __clang__
+//  Clang C++ emulates GCC, so it has to appear early.
+#   define BOOST_COMPILER_CONFIG "boost/config/compiler/clang.hpp"
+
 #elif defined __DMC__
 //  Digital Mars C++
 #   define BOOST_COMPILER_CONFIG "boost/config/compiler/digitalmars.hpp"