http://llvm.org/bugs/show_bug.cgi?id=10390

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@135393 91177308-0d34-0410-b5e6-96231b3b80d8

include/memory

@@ -595,6 +595,7 @@ void* align(size_t alignment, size_t size, void*& ptr, size_t& space);
 #include <limits>
 #include <iterator>
 #include <__functional_base>
+#include <iosfwd>
 #if defined(_LIBCPP_NO_EXCEPTIONS)
     #include <cassert>
 #endif
@@ -4148,6 +4149,11 @@ struct _LIBCPP_VISIBLE hash<shared_ptr<_Tp> >
     }
 };
 
+template<class _CharT, class _Traits, class _Y>
+inline _LIBCPP_INLINE_VISIBILITY
+basic_ostream<_CharT, _Traits>&
+operator<<(basic_ostream<_CharT, _Traits>& __os, shared_ptr<_Y> const& __p);
+
 //enum class
 struct _LIBCPP_VISIBLE pointer_safety
 {