Index: contrib/elftoolchain/elfcopy/main.c
===================================================================
--- contrib/elftoolchain/elfcopy/main.c
+++ contrib/elftoolchain/elfcopy/main.c
@@ -1168,7 +1168,7 @@
 	    ((ecp->flags & DISCARD_LLABEL) == 0) &&
 	    lookup_symop_list(ecp, NULL, SYMOP_STRIP) == NULL)
 		ecp->strip = STRIP_ALL;
-	if (argc == 0)
+	if (argc == 0 || (outfile != NULL && argc > 1))
 		strip_usage();
 
 	for (i = 0; i < argc; i++)
Index: contrib/elftoolchain/elfcopy/strip.1
===================================================================
--- contrib/elftoolchain/elfcopy/strip.1
+++ contrib/elftoolchain/elfcopy/strip.1
@@ -23,7 +23,7 @@
 .\"
 .\" $Id: strip.1 3642 2018-10-14 14:24:28Z jkoshy $
 .\"
-.Dd September 17, 2011
+.Dd July 23, 2019
 .Dt STRIP 1
 .Os
 .Sh NAME
@@ -67,6 +67,7 @@
 Write the stripped object to file
 .Ar outputfile .
 The default behaviour is to modify objects in place.
+When this argument is used, only one input file may be specified.
 .It Fl p | Fl -preserve-dates
 Preserve the object's access and modification times.
 .It Fl s | Fl -strip-all