10080 smatch Makefile changes for usr/src/cmd

*** 21,32 ****
  #
  # Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
  # Use is subject to license terms.
  # Copyright (c) 2013 Andrew Stormont.  All rights reserved.
  #
! # cmd/sa/Makefile
! #
  
  MANIFEST =      sar.xml
  SVCMETHOD =     svc-sar
  
  include ../Makefile.cmd
--- 21,31 ----
  #
  # Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
  # Use is subject to license terms.
  # Copyright (c) 2013 Andrew Stormont.  All rights reserved.
  #
! # Copyright (c) 2018, Joyent, Inc.
  
  MANIFEST =      sar.xml
  SVCMETHOD =     svc-sar
  
  include ../Makefile.cmd
*** 34,43 ****
--- 33,44 ----
  ROOTMANIFESTDIR = $(ROOTSVCSYSTEM)
  
  CERRWARN +=     -_gcc=-Wno-parentheses
  CERRWARN +=     -_gcc=-Wno-uninitialized
  
+ SMOFF += all_func_returns
+ 
  GREP=           grep
  
  SADC=           sadc
  SAR=            sar
  TIMEX=          timex