visibility-decoration.

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@114559 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/include/ostream b/include/ostream
index 7b02716..fae9d30 100644
--- a/include/ostream
+++ b/include/ostream
@@ -138,7 +138,7 @@
 _LIBCPP_BEGIN_NAMESPACE_STD
 
 template <class _CharT, class _Traits>
-class basic_ostream
+class _LIBCPP_VISIBLE basic_ostream
     : virtual public basic_ios<_CharT, _Traits>
 {
 public:
@@ -203,7 +203,7 @@
 };
 
 template <class _CharT, class _Traits>
-class basic_ostream<_CharT, _Traits>::sentry
+class _LIBCPP_VISIBLE basic_ostream<_CharT, _Traits>::sentry
 {
     bool __ok_;
     basic_ostream<_CharT, _Traits>& __os_;