anchor.diff:  			      t_list(t_tuple([t_atom(),
   					      t_list(t_tuple([t_atom(),
   							      t_any()]))]))]);
  +		   ['build_type'] ->
  +                     t_system_build_type_return();
   		   ['break_ignored'] ->
   		     t_boolean();
  +                   ['c_compiler_used'] ->
  +                     t_tuple([t_atom(), t_any()]);
   		   ['cpu_topology'] ->
   		     t_system_cpu_topology();
   		   ['compat_rel'] ->
  
positive.code: 		   ['heap_sizes'] ->
  		     t_list(t_integer());
  		   ['heap_type'] ->
  		     t_sup([t_atom('private'), t_atom('hybrid')]);
  		   ['hipe_architecture'] ->
  		     t_atoms(['amd64', 'arm', 'powerpc', 'ppc64',
  			      'undefined', 'ultrasparc', 'x86']);
  
negative.code: t_system_profile_return() ->
    t_sup(t_atom('undefined'),
  	t_tuple([t_sup(t_pid(), t_port()), t_system_profile_options()])).
  
  t_system_build_type_return() ->
    t_sup([t_atom('opt'),
           t_atom('debug'),
           t_atom('purify'),
           t_atom('quantify'),
           t_atom('purecov'),
           t_atom('gcov'),
           t_atom('valgrind'),
           t_atom('gprof'),
           t_atom('lcnt')]).
  
  %% =====================================================================
  %% These are used for the built-in functions of 'ets'
  