--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/ada/libgnarl/a-exetim__mingw.ads	Fri Oct 27 22:46:09 2017 +0900
@@ -0,0 +1,134 @@
+------------------------------------------------------------------------------
+--                                                                          --
+--                         GNAT RUN-TIME COMPONENTS                         --
+--                                                                          --
+--                   A D A . E X E C U T I O N _ T I M E                    --
+--                                                                          --
+--                                 S p e c                                  --
+--                                                                          --
+--          Copyright (C) 2009-2017, Free Software Foundation, Inc.         --
+--                                                                          --
+-- This specification is derived from the Ada Reference Manual for use with --
+-- GNAT. The copyright notice above, and the license provisions that follow --
+-- apply solely to the  contents of the part following the private keyword. --
+--                                                                          --
+-- 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/>.                                          --
+--                                                                          --
+-- GNAT was originally developed  by the GNAT team at  New York University. --
+-- Extensive contributions were provided by Ada Core Technologies Inc.      --
+--                                                                          --
+------------------------------------------------------------------------------
+
+--  This is the Windows native version of this package
+
+with Ada.Task_Identification;
+with Ada.Real_Time;
+
+package Ada.Execution_Time with
+  SPARK_Mode
+is
+   type CPU_Time is private;
+
+   CPU_Time_First : constant CPU_Time;
+   CPU_Time_Last  : constant CPU_Time;
+   CPU_Time_Unit  : constant := 0.000001;
+   CPU_Tick       : constant Ada.Real_Time.Time_Span;
+
+   use type Ada.Task_Identification.Task_Id;
+
+   function Clock
+     (T : Ada.Task_Identification.Task_Id :=
+        Ada.Task_Identification.Current_Task)
+      return CPU_Time
+   with
+     Volatile_Function,
+     Global => Ada.Real_Time.Clock_Time,
+     Pre    => T /= Ada.Task_Identification.Null_Task_Id;
+
+   function "+"
+     (Left  : CPU_Time;
+      Right : Ada.Real_Time.Time_Span) return CPU_Time
+   with
+     Global => null;
+
+   function "+"
+     (Left  : Ada.Real_Time.Time_Span;
+      Right : CPU_Time) return CPU_Time
+   with
+     Global => null;
+
+   function "-"
+     (Left  : CPU_Time;
+      Right : Ada.Real_Time.Time_Span) return CPU_Time
+   with
+     Global => null;
+
+   function "-"
+     (Left  : CPU_Time;
+      Right : CPU_Time) return Ada.Real_Time.Time_Span
+   with
+     Global => null;
+
+   function "<"  (Left, Right : CPU_Time) return Boolean with
+     Global => null;
+   function "<=" (Left, Right : CPU_Time) return Boolean with
+     Global => null;
+   function ">"  (Left, Right : CPU_Time) return Boolean with
+     Global => null;
+   function ">=" (Left, Right : CPU_Time) return Boolean with
+     Global => null;
+
+   procedure Split
+     (T  : CPU_Time;
+      SC : out Ada.Real_Time.Seconds_Count;
+      TS : out Ada.Real_Time.Time_Span)
+   with
+     Global => null;
+
+   function Time_Of
+     (SC : Ada.Real_Time.Seconds_Count;
+      TS : Ada.Real_Time.Time_Span := Ada.Real_Time.Time_Span_Zero)
+      return CPU_Time
+   with
+     Global => null;
+
+   Interrupt_Clocks_Supported          : constant Boolean := False;
+   Separate_Interrupt_Clocks_Supported : constant Boolean := False;
+
+   pragma Warnings (Off, "check will fail at run time");
+   function Clock_For_Interrupts return CPU_Time with
+     Volatile_Function,
+     Global => Ada.Real_Time.Clock_Time,
+     Pre    => Interrupt_Clocks_Supported;
+   pragma Warnings (On, "check will fail at run time");
+
+private
+   pragma SPARK_Mode (Off);
+
+   type CPU_Time is new Ada.Real_Time.Time;
+
+   CPU_Time_First : constant CPU_Time  := CPU_Time (Ada.Real_Time.Time_First);
+   CPU_Time_Last  : constant CPU_Time  := CPU_Time (Ada.Real_Time.Time_Last);
+
+   CPU_Tick : constant Ada.Real_Time.Time_Span := Ada.Real_Time.Tick;
+
+   pragma Import (Intrinsic, "<");
+   pragma Import (Intrinsic, "<=");
+   pragma Import (Intrinsic, ">");
+   pragma Import (Intrinsic, ">=");
+
+end Ada.Execution_Time;