Imported existing code

libraries/include/boost/smart_ptr/detail/sp_has_sync.hpp

@@ -0,0 +1,49 @@
+#ifndef BOOST_SMART_PTR_DETAIL_SP_HAS_SYNC_HPP_INCLUDED
+#define BOOST_SMART_PTR_DETAIL_SP_HAS_SYNC_HPP_INCLUDED
+
+// MS compatible compilers support #pragma once
+
+#if defined(_MSC_VER) && (_MSC_VER >= 1020)
+# pragma once
+#endif
+
+//
+//  boost/smart_ptr/detail/sp_has_sync.hpp
+//
+//  Copyright (c) 2008, 2009 Peter Dimov
+//
+//  Distributed under 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)
+//
+//  Defines the BOOST_SP_HAS_SYNC macro if the __sync_* intrinsics
+//  are available.
+//
+
+#if defined(__GNUC__) && ( __GNUC__ * 100 + __GNUC_MINOR__ >= 401 )
+
+#define BOOST_SP_HAS_SYNC
+
+#if defined( __arm__ )  || defined( __armel__ )
+#undef BOOST_SP_HAS_SYNC
+#endif
+
+#if defined( __hppa ) || defined( __hppa__ )
+#undef BOOST_SP_HAS_SYNC
+#endif
+
+#if defined( __m68k__ )
+#undef BOOST_SP_HAS_SYNC
+#endif
+
+#if defined( __sparc__ )
+#undef BOOST_SP_HAS_SYNC
+#endif
+
+#if defined( __INTEL_COMPILER ) && !defined( __ia64__ )
+#undef BOOST_SP_HAS_SYNC
+#endif
+
+#endif // __GNUC__ * 100 + __GNUC_MINOR__ >= 401
+
+#endif // #ifndef BOOST_SMART_PTR_DETAIL_SP_HAS_SYNC_HPP_INCLUDED