show work much better now..

Rev: lib/modules/Thread.pmod:1.2
Rev: lib/modules/__builtin.pmod:1.1

lib/modules/Thread.pmod

-constant Mutex=_static_modules.Builtin.Mutex;
-constant Condition=_static_modules.Builtin.Condition;
+constant Mutex=__builtin.Mutex;
+constant Condition=__builtin.Condition;
 
 class Fifo {
   inherit Builtin.condition : r_cond;

lib/modules/__builtin.pmod

+inherit _static_modules.Builtin;