--- boost/config/compiler/clang.hpp
+++ boost/config/compiler/clang.hpp
@@ -260,9 +260,7 @@
 
 
 // Unused attribute:
-#if defined(__GNUC__) && (__GNUC__ >= 4)
 #  define BOOST_ATTRIBUTE_UNUSED __attribute__((unused))
-#endif
 
 #ifndef BOOST_COMPILER
 #  define BOOST_COMPILER "Clang version " __clang_version__

# workdir/UnpackedTarball/boost\boost/smart_ptr/detail/sp_counted_base_clang.hpp(29,1) :  error: cannot mangle this C11 atomic type yet
# inline void atomic_increment( atomic_int_least32_t * pw )
# ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
--- boost/smart_ptr/detail/sp_counted_base.hpp
+++ boost/smart_ptr/detail/sp_counted_base.hpp
@@ -21,7 +21,7 @@
 #include <boost/smart_ptr/detail/sp_has_sync.hpp>
 
 #if defined( __clang__ ) && defined( __has_extension )
-# if __has_extension( __c_atomic__ )
+# if __has_extension( __c_atomic__ ) && !defined _MSC_VER
 #   define BOOST_SP_HAS_CLANG_C11_ATOMICS
 # endif
 #endif

# C:/lo64/core/workdir/UnpackedTarball/boost/libs/thread/src/win32/thread.cpp(1006,36) :  error: dllimport cannot be applied to non-inline function definition
#     BOOST_THREAD_DECL void __cdecl on_process_enter()
#                                    ^
--- boost/thread/detail/config.hpp
+++ boost/thread/detail/config.hpp
@@ -396,7 +396,7 @@
 #else //Use default
 #   if defined(BOOST_THREAD_PLATFORM_WIN32)
 #       if defined(BOOST_MSVC) || defined(BOOST_INTEL_WIN) \
-      || defined(__MINGW32__) || defined(MINGW32) || defined(BOOST_MINGW32)
+      || defined(__MINGW32__) || defined(MINGW32) || defined(BOOST_MINGW32) || defined __clang__
       //For compilers supporting auto-tss cleanup
             //with Boost.Threads lib, use Boost.Threads lib
 #           define BOOST_THREAD_USE_LIB