Index: clang/include/clang/Driver/Options.td
===================================================================
--- clang/include/clang/Driver/Options.td
+++ clang/include/clang/Driver/Options.td
@@ -4630,6 +4630,8 @@
   AliasArgs<["no-sign-compare"]>;
 def _SLASH_wd4100 : CLFlag<"wd4100">, Alias<W_Joined>,
   AliasArgs<["no-unused-parameter"]>;
+def _SLASH_wd4101 : CLFlag<"wd4101">, Alias<W_Joined>,
+  AliasArgs<["no-unused-variable"]>;
 def _SLASH_wd4910 : CLFlag<"wd4910">, Alias<W_Joined>,
   AliasArgs<["no-dllexport-explicit-instantiation-decl"]>;
 def _SLASH_wd4996 : CLFlag<"wd4996">, Alias<W_Joined>,