X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=matita%2Fcomponents%2Fng_library%2FnCicLibrary.ml;h=1852673f896c7a55c12a6babaa459347e8b657d4;hb=HEAD;hp=b63fe6a71263ec1e31e1bd7f555bc10fed89ab66;hpb=cbd81dcc1ca77e8bbd0ca5262ffbb1a09d2a5508;p=helm.git

diff --git a/matita/components/ng_library/nCicLibrary.ml b/matita/components/ng_library/nCicLibrary.ml
index b63fe6a71..1852673f8 100644
--- a/matita/components/ng_library/nCicLibrary.ml
+++ b/matita/components/ng_library/nCicLibrary.ml
@@ -183,7 +183,7 @@ class dumpable_status =
   method dump = db
   method set_dump v = {< db = v >}
   method set_dumpable_status
-   : 'status. #g_dumpable_status as 'status -> 'self
+   : 'status. (#g_dumpable_status as 'status) -> 'self
    = fun o -> {< db = o#dump >}
  end
 
@@ -260,7 +260,10 @@ module Serializer(D: sig type dumpable_s = private #dumpable_status end) =
    let ch = open_out (ng_path_of_baseuri baseuri) in
    Marshal.to_channel ch (magic,(status#dump.dependencies,status#dump.objs)) [];
    close_out ch;
+
+   if Helm_registry.get_bool "matita.remove_old_objects" then
    remove_objects ~baseuri; (* FG: we remove the old objects before putting the new ones*)
+
    List.iter
     (function 
      | `Obj (uri,obj) ->
@@ -370,7 +373,7 @@ let add_obj status ((u,_,_,_,_) as orig_obj) =
   status#set_timestamp (!storage,!local_aliases)
 ;;
 
-let add_constraint status u1 u2 = 
+let add_constraint status ~acyclic u1 u2 = 
   if
    List.exists
     (function `Constr (u1',u2') when u1=u1' && u2=u2' -> true | _ -> false)
@@ -378,7 +381,7 @@ let add_constraint status u1 u2 =
   then
    (*CSC: raise an exception here! *)
    (prerr_endline "CANNOT ADD A CONSTRAINT TWICE"; assert false);
-  NCicEnvironment.add_lt_constraint u1 u2;
+  NCicEnvironment.add_lt_constraint ~acyclic u1 u2;
   storage := (`Constr (u1,u2)) :: !storage;
   status#set_timestamp (!storage,!local_aliases)
 ;;