Index: lld/MinGW/Options.td
===================================================================
--- lld/MinGW/Options.td
+++ lld/MinGW/Options.td
@@ -103,6 +103,7 @@
 
 // Ignored options
 def: Joined<["-"], "O">;
+def: F<"allow-shlib-undefined">;
 def: F<"build-id">;
 def: F<"disable-auto-image-base">;
 def: F<"enable-auto-image-base">;
@@ -111,6 +112,7 @@
 def: F<"high-entropy-va">;
 def: S<"major-image-version">;
 def: S<"minor-image-version">;
+def: F<"no-allow-shlib-undefined">;
 def: F<"no-seh">;
 def: F<"nxcompat">;
 def: F<"pic-executable">;