--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/ada/libgnat/s-multip.adb	Fri Oct 27 22:46:09 2017 +0900
@@ -0,0 +1,51 @@
+------------------------------------------------------------------------------
+--                                                                          --
+--                         GNAT COMPILER COMPONENTS                         --
+--                                                                          --
+--               S Y S T E M . M U L T I P R O C E S S O R S                --
+--                                                                          --
+--                                  B o d y                                 --
+--                                                                          --
+--         Copyright (C) 2010-2017, Free Software Foundation, Inc.          --
+--                                                                          --
+-- GNAT 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 3,  or (at your option) any later ver- --
+-- sion.  GNAT 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.                                     --
+--                                                                          --
+-- As a special exception under Section 7 of GPL version 3, you are granted --
+-- additional permissions described in the GCC Runtime Library Exception,   --
+-- version 3.1, as published by the Free Software Foundation.               --
+--                                                                          --
+-- You should have received a copy of the GNU General Public License and    --
+-- a copy of the GCC Runtime Library Exception along with this program;     --
+-- see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see    --
+-- <http://www.gnu.org/licenses/>.                                          --
+--                                                                          --
+------------------------------------------------------------------------------
+
+with Interfaces.C; use Interfaces.C;
+
+package body System.Multiprocessors is
+
+   --------------------
+   -- Number_Of_CPUs --
+   --------------------
+
+   function Number_Of_CPUs return CPU is
+   begin
+      if CPU'Last = 1 then
+         return 1;
+      else
+         declare
+            function Gnat_Number_Of_CPUs return int;
+            pragma Import (C, Gnat_Number_Of_CPUs, "__gnat_number_of_cpus");
+         begin
+            return CPU (Gnat_Number_Of_CPUs);
+         end;
+      end if;
+   end Number_Of_CPUs;
+
+end System.Multiprocessors;