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diff --git a/ortho/agcc/agcc.ads b/ortho/agcc/agcc.ads
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+--  Ada bindings for GCC internals.
+--  Copyright (C) 2002, 2003, 2004, 2005 Tristan Gingold
+--
+--  GHDL is free software; you can redistribute it and/or modify it under
+--  the terms of the GNU General Public License as published by the Free
+--  Software Foundation; either version 2, or (at your option) any later
+--  version.
+--
+--  GHDL is distributed in the hope that it will be useful, but WITHOUT 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
+--  along with GCC; see the file COPYING.  If not, write to the Free
+--  Software Foundation, 59 Temple Place - Suite 330, Boston, MA
+--  02111-1307, USA.
+with System;
+with Interfaces.C;
+
+package Agcc is
+   pragma Pure (Agcc);
+
+   subtype Chars is System.Address;
+   NULL_Chars : Chars renames System.Null_Address;
+
+   Nul : constant Character := Character'Val (0);
+
+   --  Names size_t.
+   type Size_T is new Interfaces.C.size_t;
+
+   --  Ada representation of boolean type in C.
+   --  Never compare with C_TRUE, since in C any value different from 0 is
+   --  considered as true.
+   type C_Bool is new Integer;
+   pragma Convention (C, C_Bool);
+
+   subtype C_Boolean is C_Bool range 0 .. 1;
+
+   C_False : constant C_Bool := 0;
+   C_True : constant C_Bool := 1;
+
+   function "+" (B : C_Bool) return Boolean;
+   pragma Inline ("+");
+end Agcc;