10079 smatch Makefile changes for usr/src/lib

*** 20,29 ****
--- 20,30 ----
  #
  #
  # Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
  # Use is subject to license terms.
  #
+ # Copyright (c) 2018, Joyent, Inc.
  
  LIBRARY= libss.a
  VERS= .1
  
  SSOBJS= \
*** 67,76 ****
--- 68,79 ----
  
  CFLAGS +=       $(CCVERBOSE) -I..
  CERRWARN +=     -_gcc=-Wno-switch
  CERRWARN +=     -_gcc=-Wno-unused-variable
  
+ SMOFF += all_func_returns
+ 
  DYNFLAGS +=     $(KRUNPATH) $(KMECHLIB) $(ZIGNORE)
  
  LDLIBS +=       -lc -ltecla
  
  $(PICS) :=      CFLAGS += $(XFFLAG)