Index: test/tools/llvm-objcopy/strip-all-gnu.test
===================================================================
--- test/tools/llvm-objcopy/strip-all-gnu.test
+++ test/tools/llvm-objcopy/strip-all-gnu.test
@@ -1,6 +1,8 @@
 # RUN: yaml2obj %s > %t
 # RUN: llvm-objcopy --strip-all-gnu %t %t2
 # RUN: llvm-readobj -file-headers -sections %t2 | FileCheck %s
+# RUN: llvm-objcopy -S %t %t2
+# RUN: llvm-readobj -file-headers -sections %t2 | FileCheck %s
 
 !ELF
 FileHeader:
Index: tools/llvm-objcopy/ObjcopyOpts.td
===================================================================
--- tools/llvm-objcopy/ObjcopyOpts.td
+++ tools/llvm-objcopy/ObjcopyOpts.td
@@ -67,6 +67,8 @@
                 HelpText<"Remove non-allocated sections other than .gnu.warning* sections">;
 def strip_all_gnu : Flag<["-", "--"], "strip-all-gnu">,
                     HelpText<"Compaitable with GNU objcopy's --strip-all">;
+def S : JoinedOrSeparate<["-"], "S">,
+        Alias<strip_all_gnu>;
 def strip_debug : Flag<["-", "--"], "strip-debug">,
                   HelpText<"Remove all debug information">;
 def strip_dwo : Flag<["-", "--"], "strip-dwo">,