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diff --git a/lib/system.mli b/lib/system.mli
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+(************************************************************************)
+(*  v      *   The Coq Proof Assistant  /  The Coq Development Team     *)
+(* <O___,, * CNRS-Ecole Polytechnique-INRIA Futurs-Universite Paris Sud *)
+(*   \VV/  **************************************************************)
+(*    //   *      This file is distributed under the terms of the       *)
+(*         *       GNU Lesser General Public License Version 2.1        *)
+(************************************************************************)
+
+(*i $Id: system.mli,v 1.17.16.1 2004/07/16 19:30:31 herbelin Exp $ i*)
+
+(*s Files and load paths. Load path entries remember the original root
+    given by the user. For efficiency, we keep the full path (field
+    [directory]), the root path and the path relative to the root. *)
+
+
+type physical_path = string
+type load_path = physical_path list
+
+val all_subdirs : unix_path:string -> (physical_path * string list) list
+val is_in_path : load_path -> string -> bool
+val where_in_path : load_path -> string -> physical_path * string
+
+val make_suffix : string -> string -> string
+val file_readable_p : string -> bool
+
+val glob : string -> string
+
+val home : string
+
+val exists_dir : string -> bool
+
+val find_file_in_path : load_path -> string -> physical_path * string
+
+(*s Generic input and output functions, parameterized by a magic number
+  and a suffix. The intern functions raise the exception [Bad_magic_number]
+  when the check fails, with the full file name. *)
+
+val marshal_out : out_channel -> 'a -> unit
+val marshal_in : in_channel -> 'a
+
+exception Bad_magic_number of string
+
+val raw_extern_intern : int -> string -> 
+  (string -> string * out_channel) * (string -> in_channel)
+
+val extern_intern : 
+  int -> string -> (string -> 'a -> unit) * (load_path -> string -> 'a)
+
+(*s Time stamps. *)
+
+type time
+
+val process_time : unit -> float * float
+val get_time : unit -> time
+val time_difference : time -> time -> float (* in seconds *)
+val fmt_time_difference : time -> time -> Pp.std_ppcmds
+
+