Index: lld/trunk/MinGW/Options.td
===================================================================
--- lld/trunk/MinGW/Options.td
+++ lld/trunk/MinGW/Options.td
@@ -19,6 +19,7 @@
 def o: JoinedOrSeparate<["-"], "o">, MetaVarName<"<path>">,
   HelpText<"Path to file to write output">;
 def out_implib: Separate<["--"], "out-implib">, HelpText<"Import library name">;
+def out_implib_eq: Joined<["--"], "out-implib=">, Alias<out_implib>;
 def output_def: S<"output-def">, HelpText<"Output def file">;
 def shared: F<"shared">, HelpText<"Build a shared object">;
 def subs: S<"subsystem">, HelpText<"Specify subsystem">;
Index: lld/trunk/test/MinGW/driver.test
===================================================================
--- lld/trunk/test/MinGW/driver.test
+++ lld/trunk/test/MinGW/driver.test
@@ -38,6 +38,7 @@
 OUT: -out:bar.exe
 
 RUN: ld.lld -### foo.o -m i386pep --out-implib bar | FileCheck -check-prefix=IMPLIB %s
+RUN: ld.lld -### foo.o -m i386pep --out-implib=bar | FileCheck -check-prefix=IMPLIB %s
 IMPLIB: -implib:bar
 
 RUN: ld.lld -### foo.o -m i386pep -out-implib bar | FileCheck -check-prefix=NOIMPLIB %s