10080 smatch Makefile changes for usr/src/cmd

*** 21,30 ****
--- 21,31 ----
  
  #
  # Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
  # Use is subject to license terms.
  #
+ # Copyright (c) 2018, Joyent, Inc.
  
  SHELL=/usr/bin/ksh93
  
  include ../Makefile.cmd
  $(SPARC_BLD)include ../Makefile.cmd.64
*** 61,70 ****
--- 62,73 ----
  CFLAGS64 += \
          $(ASTCFLAGS64)
  
  CERRWARN +=     -_gcc=-Wno-parentheses
  
+ SMOFF +=        all_func_returns
+ 
  ROOTCMDDIR=$(ROOT)/usr/bin
  
  PROG= shcomp
  
  %.o:    $(LIBSHELLSRC)/%.c