10080 smatch Makefile changes for usr/src/cmd

@@ -21,10 +21,11 @@
 #
 #
 # Copyright 2004 Sun Microsystems, Inc.  All rights reserved.
 # Use is subject to license terms.
 #
+# Copyright (c) 2018, Joyent, Inc.
 
 include ../../Makefile.cmd
 
 LIBADMDIR = ../../../lib/libadm/inc
 CPPFLAGS += -I$(LIBADMDIR)

@@ -36,10 +37,12 @@
 LDLIBS += -ladm
 
 CERRWARN += -_gcc=-Wno-parentheses
 CERRWARN += -_gcc=-Wno-uninitialized
 
+SMOFF += signed
+
 .KEEP_STATE:
 
 .PARALLEL: $(PROG)
 
 all: $(PROG)