New language: Ada

git-svn-id: https://gcc.gnu.org/svn/gcc/trunk@45947 138bc75d-0d04-0410-961f-82ee72b054a4

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+------------------------------------------------------------------------------
+--                                                                          --
+--                        GNAT RUN-TIME COMPONENTS                          --
+--                                                                          --
+--                               S Y S T E M                                --
+--                                                                          --
+--                                 S p e c                                  --
+--                            (Compiler Version)                             --
+--                                                                          --
+--                            $Revision: 1.48 $
+--                                                                          --
+--          Copyright (C) 1992-2001 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 2,  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.  See the GNU General Public License --
+-- for  more details.  You should have  received  a copy of the GNU General --
+-- Public License  distributed with GNAT;  see file COPYING.  If not, write --
+-- to  the Free Software Foundation,  59 Temple Place - Suite 330,  Boston, --
+-- MA 02111-1307, 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.                                      --
+--                                                                          --
+-- GNAT was originally developed  by the GNAT team at  New York University. --
+-- It is now maintained by Ada Core Technologies Inc (http://www.gnat.com). --
+--                                                                          --
+------------------------------------------------------------------------------
+
+package System is
+pragma Pure (System);
+--  Note that we take advantage of the implementation permission to
+--  make this unit Pure instead of Preelaborable, see RM 13.7(36)
+
+   type Name is (SYSTEM_NAME_GNAT);
+   System_Name : constant Name := SYSTEM_NAME_GNAT;
+
+   --  System-Dependent Named Numbers
+
+   Min_Int               : constant := Long_Long_Integer'First;
+   Max_Int               : constant := Long_Long_Integer'Last;
+
+   Max_Binary_Modulus    : constant := 2 ** Long_Long_Integer'Size;
+   Max_Nonbinary_Modulus : constant := Integer'Last;
+
+   Max_Base_Digits       : constant := Long_Long_Float'Digits;
+   Max_Digits            : constant := Long_Long_Float'Digits;
+
+   Max_Mantissa          : constant := 63;
+   Fine_Delta            : constant := 2.0 ** (-Max_Mantissa);
+
+   Tick                  : constant := Standard'Tick;
+
+   --  Storage-related Declarations
+
+   type Address is private;
+   Null_Address : constant Address;
+
+   Storage_Unit : constant := Standard'Storage_Unit;
+   Word_Size    : constant := Standard'Word_Size;
+   Memory_Size  : constant := 2 ** Standard'Address_Size;
+
+   --  Address comparison
+
+   function "<"  (Left, Right : Address) return Boolean;
+   function "<=" (Left, Right : Address) return Boolean;
+   function ">"  (Left, Right : Address) return Boolean;
+   function ">=" (Left, Right : Address) return Boolean;
+   function "="  (Left, Right : Address) return Boolean;
+
+   pragma Import (Intrinsic, "<");
+   pragma Import (Intrinsic, "<=");
+   pragma Import (Intrinsic, ">");
+   pragma Import (Intrinsic, ">=");
+   pragma Import (Intrinsic, "=");
+
+   --  Other System-Dependent Declarations
+
+   type Bit_Order is (High_Order_First, Low_Order_First);
+   Default_Bit_Order : constant Bit_Order :=
+                         Bit_Order'Val (Standard'Default_Bit_Order);
+
+   --  Priority-related Declarations (RM D.1)
+
+   Max_Priority : constant Positive := 30;
+
+   Max_Interrupt_Priority : constant Positive := 31;
+
+   subtype Any_Priority is Integer
+     range 0 .. Standard'Max_Interrupt_Priority;
+
+   subtype Priority is Any_Priority
+     range 0 .. Standard'Max_Priority;
+
+   --  Functional notation is needed in the following to avoid visibility
+   --  problems when this package is compiled through rtsfind in the middle
+   --  of another compilation.
+
+   subtype Interrupt_Priority is Any_Priority
+     range
+       Standard."+" (Standard'Max_Priority,  1) ..
+         Standard'Max_Interrupt_Priority;
+
+   Default_Priority : constant Priority :=
+     Standard."/" (Standard."+" (Priority'First, Priority'Last), 2);
+
+private
+
+   type Address is mod Memory_Size;
+   Null_Address : constant Address := 0;
+
+   --------------------------------------
+   -- System Implementation Parameters --
+   --------------------------------------
+
+   --  These parameters provide information about the target that is used
+   --  by the compiler. They are in the private part of System, where they
+   --  can be accessed using the special circuitry in the Targparm unit
+   --  whose source should be consulted for more detailed descriptions
+   --  of the individual switch values.
+
+   --  This version of system.ads is used only for building the compiler.
+   --  We really ought to use the proper target system (i.e. the one that
+   --  corresponds to the host for the compiler), but that causes as yet
+   --  unsolved makefile problems. For the most part the setting of these
+   --  parameters is not too critical for the compiler version (e.g. we
+   --  do not use floating-point anyway in the compiler).
+
+   AAMP                      : constant Boolean := False;
+   Command_Line_Args         : constant Boolean := True;
+   Denorm                    : constant Boolean := True;
+   Frontend_Layout           : constant Boolean := False;
+   Functions_Return_By_DSP   : constant Boolean := False;
+   Long_Shifts_Inlined       : constant Boolean := True;
+   High_Integrity_Mode       : constant Boolean := False;
+   Machine_Overflows         : constant Boolean := False;
+   Machine_Rounds            : constant Boolean := True;
+   OpenVMS                   : constant Boolean := False;
+   Signed_Zeros              : constant Boolean := True;
+   Stack_Check_Default       : constant Boolean := False;
+   Stack_Check_Probes        : constant Boolean := False;
+   Use_Ada_Main_Program_Name : constant Boolean := False;
+   ZCX_By_Default            : constant Boolean := False;
+   GCC_ZCX_Support           : constant Boolean := False;
+   Front_End_ZCX_Support     : constant Boolean := False;
+
+end System;