s-stalib.adb   [plain text]


------------------------------------------------------------------------------
--                                                                          --
--                         GNAT COMPILER COMPONENTS                         --
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--              S Y S T E M . S T A N D A R D _ L I B R A R Y               --
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--          Copyright (C) 1995-2004 Free Software Foundation, Inc.          --
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-- unit, or you link  this unit with other files  to produce an executable, --
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------------------------------------------------------------------------------

--  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

pragma Polling (Off);
--  We must turn polling off for this unit, because otherwise we get
--  elaboration circularities with Ada.Exceptions if polling is on.

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 explicitely 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.

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.

   Inside_Elab_Final_Code : Integer := 0;
   pragma Export (C, Inside_Elab_Final_Code, "__gnat_inside_elab_final_code");
   --  ???This variable is obsolete since 2001-08-29 but cannot be removed
   --  ???right away due to the bootstrap problems

   --------------------------
   -- 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.

   procedure Break_Start is
   begin
      null;
   end Break_Start;

end System.Standard_Library;