Index: lld/MinGW/Options.td
===================================================================
--- lld/MinGW/Options.td
+++ lld/MinGW/Options.td
@@ -137,3 +137,4 @@
 def: J<"sysroot">;
 def: F<"start-group">;
 def: F<"tsaware">;
+def: F<"no-undefined">;