------------------------------------------------------------------------------
--                                                                          --
--                         GNAT COMPILER COMPONENTS                         --
--                                                                          --
--              S Y S T E M . S T A N D A R D _ L I B R A R Y               --
--                                                                          --
--                                 B o d y                                  --
--                                                                          --
--          Copyright (C) 1995-2020, 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/>.                                          --
--                                                                          --
-- GNAT was originally developed  by the GNAT team at  New York University. --
-- Extensive contributions were provided by Ada Core Technologies Inc.      --
--                                                                          --
------------------------------------------------------------------------------

pragma Compiler_Unit_Warning;

--  The purpose of this body is simply to ensure that the two with'ed units
--  are properly included in the link. They are not with'ed from the spec
--  of System.Standard_Library, since this would cause order of elaboration
--  problems (Elaborate_Body would have the same problem).

pragma Warnings (Off);
--  Kill warnings from unused withs. These unused with's are here to make
--  sure the relevant units are loaded and properly elaborated.

with System.Soft_Links;
--  Referenced directly from generated code using external symbols so it
--  must always be present in a build, even if no unit has a direct with
--  of this unit. Also referenced from exception handling routines.
--  This is needed for programs that don't use exceptions explicitly but
--  direct calls to Ada.Exceptions are generated by gigi (for example,
--  by calling __gnat_raise_constraint_error directly).

with System.Memory;
--  Referenced directly from generated code using external symbols, so it
--  must always be present in a build, even if no unit has a direct with
--  of this unit.

pragma Warnings (On);

package body System.Standard_Library is

   Runtime_Finalized : Boolean := False;
   --  Set to True when adafinal is called. Used to ensure that subsequent
   --  calls to adafinal after the first have no effect.

   --------------------------
   -- Abort_Undefer_Direct --
   --------------------------

   procedure Abort_Undefer_Direct is
   begin
      System.Soft_Links.Abort_Undefer.all;
   end Abort_Undefer_Direct;

   --------------
   -- Adafinal --
   --------------

   procedure Adafinal is
   begin
      if not Runtime_Finalized then
         Runtime_Finalized := True;
         System.Soft_Links.Adafinal.all;
      end if;
   end Adafinal;

   -----------------
   -- Break_Start --
   -----------------

   procedure Break_Start;
   pragma Export (C, Break_Start, "__gnat_break_start");
   --  This is a dummy procedure that is called at the start of execution.
   --  Its sole purpose is to provide a well defined point for the placement
   --  of a main program breakpoint. This is not used anymore but kept for
   --  bootstrapping issues (still referenced by old gnatbind generated files).

   procedure Break_Start is
   begin
      null;
   end Break_Start;

end System.Standard_Library;
