10080 smatch Makefile changes for usr/src/cmd

*** 18,27 ****
--- 18,28 ----
  #
  # CDDL HEADER END
  #
  #
  # Copyright (c) 1996, 2010, Oracle and/or its affiliates. All rights reserved.
+ # Copyright (c) 2018, Joyent, Inc.
  #
  
  PROG=           ar
  XPG4PROG=       ar
  
*** 40,49 ****
--- 41,53 ----
  CPPFLAGS=       -I. -I../../include $(CPPFLAGS.master) -I$(ELFCAP)
  CFLAGS +=       $(CCVERBOSE)
  CSTD=   $(CSTD_GNU99)
  
  CERRWARN +=     -_gcc=-Wno-uninitialized
+ 
+ SMOFF += signed
+ 
  LDLIBS +=       -lelf $(CONVLIBDIR) $(CONV_LIB) -lsendfile
  LINTFLAGS=      -x
  LINTFLAGS64=    -x
  
  $(XPG4) :=      CPPFLAGS += -DXPG4