Fix C++17 dylib build

llvm-svn: 299401

diff --git a/libcxx/include/algorithm b/libcxx/include/algorithm
index bba6d8d..571edd2 100644 (file)
--- a/libcxx/include/algorithm
+++ b/libcxx/include/algorithm
@@ -3026,7 +3026,8 @@ uniform_int_distribution<_IntType>::operator()(_URNG& __g, const param_type& __p
     return static_cast<result_type>(__u + __p.a());
 }
 
-#if _LIBCPP_STD_VER <= 14 || defined(_LIBCPP_ENABLE_CXX17_REMOVED_RANDOM_SHUFFLE)
+#if _LIBCPP_STD_VER <= 14 || defined(_LIBCPP_ENABLE_CXX17_REMOVED_RANDOM_SHUFFLE) \
+  || defined(_LIBCPP_BUILDING_LIBRARY)
 class _LIBCPP_TYPE_VIS __rs_default;
 
 _LIBCPP_FUNC_VIS __rs_default __rs_get();