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

@@ -18,10 +18,11 @@
 # information: Portions Copyright [yyyy] [name of copyright owner]
 #
 # CDDL HEADER END
 #
 #
+# Copyright 2017 Gary Mills
 # Copyright 2004 Sun Microsystems, Inc.  All rights reserved.
 # Use is subject to license terms.
 #
 
 PROG=   amt

@@ -35,10 +36,13 @@
 LINTFLAGS +=    -erroff=E_NAME_USED_NOT_DEF2
 LINTFLAGS64 +=  -erroff=E_NAME_USED_NOT_DEF2
 
 CERRWARN +=     -_gcc=-Wno-uninitialized
 
+# Suppress errors for: p1 probe
+amt.o := CERRWARN += -_gcc=-Wno-unused-but-set-variable
+
 CLEANFILES      += $(PROG) $(OBJS)
 
 .KEEP_STATE:
 
 all: $(PROG)