10080 smatch Makefile changes for usr/src/cmd

*** 19,28 ****
--- 19,29 ----
  # CDDL HEADER END
  #
  #
  # Copyright (c) 1989, 2010, Oracle and/or its affiliates. All rights reserved.
  #
+ # Copyright (c) 2018, Joyent, Inc.
  
  PROG= expr
  XPG4PROG= expr
  XPG6PROG= expr
  
*** 36,45 ****
--- 37,48 ----
  include ../Makefile.cmd
  
  CFLAGS += $(CCVERBOSE)
  CERRWARN += -_gcc=-Wno-uninitialized
  CERRWARN += -_gcc=-Wno-extra
+ # "missing type for func"
+ SMATCH=off
  $(XPG4) := CFLAGS += -DXPG4
  $(XPG6) := CFLAGS += -DXPG6
  
  XGETFLAGS += -a -x expr.xcl