Index: include/optional
===================================================================
--- include/optional
+++ include/optional
@@ -167,7 +167,6 @@
     bad_optional_access() : logic_error("bad optional access") {}

     // Get the key function ~bad_optional_access() into the dylib
-    _LIBCPP_FUNC_VIS
     virtual ~bad_optional_access() _NOEXCEPT;
 };

Index: include/variant
===================================================================
--- include/variant
+++ include/variant
@@ -216,7 +216,7 @@

 class _LIBCPP_EXCEPTION_ABI bad_variant_access : public exception {
 public:
-  _LIBCPP_FUNC_VIS virtual const char* what() const _NOEXCEPT;
+  virtual const char* what() const _NOEXCEPT;
 };

 } // namespace std