8411 Build should warn when linking against libraries outside proto area

*** 1,10 ****
--- 1,12 ----
  #
  # Copyright 2004 Sun Microsystems, Inc.  All rights reserved.
  # Use is subject to license terms.
  #
  # Copyright 2011, Richard Lowe.
+ # Copyright 2017 RackTop Systems.
+ #
  
  include ../../Makefile.ctf
  
  LIBRARY=        libdwarf.a
  VERS=           .1
*** 97,103 ****
--- 99,108 ----
  # We can't provide CTF information for libdwarf, as the CTF tools themselves
  # depond upon it, and so aren't built yet.
  $(DYNLIB) := CTFMERGE_POST= :
  CTFCONVERT_O= :
  
+ # Disable -zassert-deflib.  We want to link against host libraries.
+ $(DYNLIB) := ZASSERTDEFLIB=
+ 
  include $(SRC)/lib/Makefile.targ