10079 smatch Makefile changes for usr/src/lib

*** 20,29 ****
--- 20,30 ----
  #
  #
  # Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
  # Use is subject to license terms.
  #
+ # Copyright (c) 2018, Joyent, Inc.
  
  LIBRARY =               libipp-core.a
  VERS =                  .0
  OBJECTS = ipp.o ipp_types.o read.o strings.o write.o
  
*** 44,53 ****
--- 45,56 ----
  
  CERRWARN +=     -_gcc=-Wno-unused-variable
  CERRWARN +=     -_gcc=-Wno-char-subscripts
  CERRWARN +=     -_gcc=-Wno-switch
  
+ SMOFF += all_func_returns
+ 
  MAPFILES =      $(SRCDIR)/mapfile
  
  LDLIBS +=       -lpapi-common -lc
  
  .KEEP_STATE: