First import from sources

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+--  Back-end specialization
+--  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 Flags;
+with Types; use Types;
+with Iirs_Utils; use Iirs_Utils;
+
+package body Back_End is
+   -- Transform a library identifier into a file name.
+   -- Very simple mechanism: just add '-simVV.cf' extension, where VV
+   -- is the version.
+   function Default_Library_To_File_Name (Library: Iir_Library_Declaration)
+     return String
+   is
+   begin
+      case Flags.Vhdl_Std is
+         when Vhdl_87 =>
+            return Image_Identifier (Library) & "-obj87.cf";
+         when Vhdl_93c | Vhdl_93 | Vhdl_00 | Vhdl_02 =>
+            return Image_Identifier (Library) & "-obj93.cf";
+      end case;
+   end Default_Library_To_File_Name;
+end Back_End;