8516 Suppress gcc errors with -Wno- in Makefile for usr/src/cmd

@@ -18,10 +18,11 @@
 #
 # CDDL HEADER END
 #
 
 #
+# Copyright 2017 Gary Mills
 # Copyright 2010 Sun Microsystems, Inc.  All rights reserved.
 # Use is subject to license terms.
 #
 
 # cmd/vi/port/Makefile

@@ -59,10 +60,14 @@
 CERRWARN += -_gcc=-Wno-unused-label
 CERRWARN += -_gcc=-Wno-unused-value
 CERRWARN += -_gcc=-Wno-uninitialized
 CERRWARN += -_gcc=-Wno-address
 
+# Suppress errors for: tmp1 n
+ex_vmain.o exobjs.xpg4/ex_vmain.o exobjs.xpg6/ex_vmain.o := \
+    CERRWARN += -_gcc=-Wno-unused-but-set-variable
+
 #
 # For message catalogue files
 #
 POFILES= $(EXOBJS:%.o=%.po) expreserve.po exrecover.po
 POFILE= port.po