--- /dev/null	2012-01-30 20:41:15.189616186 +0100
+++ b/src/gcc/ada/s-osinte-gnu.adb	2012-04-11 22:56:06.000000000 +0200
@@ -0,0 +1,110 @@
+------------------------------------------------------------------------------
+--                                                                          --
+--                 GNAT RUN-TIME LIBRARY (GNARL) COMPONENTS                 --
+--                                                                          --
+--                   S Y S T E M . O S _ I N T E R F A C E                  --
+--                                                                          --
+--                                   B o d y                                --
+--                                                                          --
+--             Copyright (C) 1991-1994, Florida State University            --
+--                     Copyright (C) 1995-2006, AdaCore                     --
+--                                                                          --
+-- GNARL is free software; you can  redistribute it  and/or modify it under --
+-- terms of the  GNU General Public License as published  by the Free Soft- --
+-- ware  Foundation;  either version 2,  or (at your option) any later ver- --
+-- sion. GNARL is distributed in the hope that it will be useful, but WITH- --
+-- OUT ANY WARRANTY;  without even the  implied warranty of MERCHANTABILITY --
+-- or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License --
+-- for  more details.  You should have  received  a copy of the GNU General --
+-- Public License  distributed with GNARL; see file COPYING.  If not, write --
+-- to  the  Free Software Foundation,  51  Franklin  Street,  Fifth  Floor, --
+-- Boston, MA 02110-1301, USA.                                              --
+--                                                                          --
+-- As a special exception,  if other files  instantiate  generics from this --
+-- unit, or you link  this unit with other files  to produce an executable, --
+-- this  unit  does not  by itself cause  the resulting  executable  to  be --
+-- covered  by the  GNU  General  Public  License.  This exception does not --
+-- however invalidate  any other reasons why  the executable file  might be --
+-- covered by the  GNU Public License.                                      --
+--                                                                          --
+-- GNARL was developed by the GNARL team at Florida State University.       --
+-- Extensive contributions were provided by Ada Core Technologies, Inc.     --
+--                                                                          --
+------------------------------------------------------------------------------
+
+--  This is the GNU/Hurd version of this package.
+
+pragma Polling (Off);
+--  Turn off polling, we do not want ATC polling to take place during
+--  tasking operations. It causes infinite loops and other problems.
+
+--  This package encapsulates all direct interfaces to OS services
+--  that are needed by children of System.
+
+package body System.OS_Interface is
+
+   --------------------
+   -- Get_Stack_Base --
+   --------------------
+
+   function Get_Stack_Base (thread : pthread_t) return Address is
+      pragma Warnings (Off, thread);
+
+   begin
+      return Null_Address;
+   end Get_Stack_Base;
+
+   ------------------
+   -- pthread_init --
+   ------------------
+
+   procedure pthread_init is
+   begin
+      null;
+   end pthread_init;
+
+   -----------------
+   -- To_Duration --
+   -----------------
+
+   function To_Duration (TS : timespec) return Duration is
+   begin
+      return Duration (TS.tv_sec) + Duration (TS.tv_nsec) / 10#1#E9;
+   end To_Duration;
+
+   ------------------------
+   -- To_Target_Priority --
+   ------------------------
+
+   function To_Target_Priority
+     (Prio : System.Any_Priority) return Interfaces.C.int
+   is
+   begin
+      return Interfaces.C.int (Prio);
+   end To_Target_Priority;
+
+   -----------------
+   -- To_Timespec --
+   -----------------
+
+   function To_Timespec (D : Duration) return timespec is
+      S : time_t;
+      F : Duration;
+
+   begin
+      S := time_t (Long_Long_Integer (D));
+      F := D - Duration (S);
+
+      --  If F has negative value due to a round-up, adjust for positive F
+      --  value.
+
+      if F < 0.0 then
+         S := S - 1;
+         F := F + 1.0;
+      end if;
+
+      return timespec'(tv_sec => S,
+                       tv_nsec => long (Long_Long_Integer (F * 10#1#E9)));
+   end To_Timespec;
+
+end System.OS_Interface;