First import from sources

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diff --git a/translate/ghdldrv/ghdlsimul.adb b/translate/ghdldrv/ghdlsimul.adb
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+--  GHDL driver - simulator commands.
+--  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 Ghdllocal; use Ghdllocal;
+with GNAT.OS_Lib; use GNAT.OS_Lib;
+
+with Types;
+with Iirs; use Iirs;
+with Flags;
+with Back_End;
+with Name_Table;
+with Errorout; use Errorout;
+with Std_Package;
+with Canon;
+with Configuration;
+with Annotations;
+with Elaboration;
+with Sim_Be;
+with Simulation;
+
+with Ghdlcomp;
+
+package body Ghdlsimul is
+
+   Flag_Expect_Failure : Boolean := False;
+
+   procedure Compile_Init (Analyze_Only : Boolean) is
+   begin
+      if Analyze_Only then
+         return;
+      end if;
+
+      -- Initialize.
+      Back_End.Finish_Compilation := Sim_Be.Finish_Compilation'Access;
+      Back_End.Sem_Foreign := null;
+
+      Setup_Libraries (False);
+      Libraries.Load_Std_Library;
+
+      -- Here, time_base can be set.
+      Annotations.Annotate (Std_Package.Std_Standard_Unit);
+
+      Canon.Canon_Flag_Add_Labels := True;
+   end Compile_Init;
+
+   procedure Compile_Elab
+     (Cmd_Name : String; Args : Argument_List; Opt_Arg : out Natural)
+   is
+   begin
+      Extract_Elab_Unit (Cmd_Name, Args, Opt_Arg);
+
+      Flags.Flag_Elaborate := True;
+      -- Translation.Chap12.Elaborate (Prim_Name.all, Sec_Name.all, "", True);
+
+      if Errorout.Nbr_Errors > 0 then
+         --  This may happen (bad entity for example).
+         raise Compilation_Error;
+      end if;
+   end Compile_Elab;
+
+   --  Set options.
+   --  This is a little bit over-kill: from C to Ada and then again to C...
+   procedure Set_Run_Options (Args : Argument_List)
+   is
+      Arg : String_Access;
+   begin
+      for I in Args'Range loop
+         Arg := Args (I);
+         if Arg.all = "--disp-tree" then
+            Simulation.Disp_Tree := True;
+         elsif Arg.all = "--expect-failure" then
+            Flag_Expect_Failure := True;
+         elsif Arg.all = "--trace-elab" then
+            Elaboration.Trace_Elaboration := True;
+         elsif Arg.all = "--trace-simu" then
+            Simulation.Trace_Simulation := True;
+         else
+            null;
+         end if;
+      end loop;
+   end Set_Run_Options;
+
+   procedure Run
+   is
+      use Name_Table;
+      use Types;
+
+      First_Id : Name_Id;
+      Sec_Id : Name_Id;
+      Top_Conf : Iir;
+   begin
+      First_Id := Get_Identifier (Prim_Name.all);
+      if Sec_Name = null then
+         Sec_Id := Null_Identifier;
+      else
+         Sec_Id := Get_Identifier (Sec_Name.all);
+      end if;
+      Top_Conf := Configuration.Configure (First_Id, Sec_Id);
+
+      Simulation.Simulation_Entity (Top_Conf);
+   end Run;
+
+   function Decode_Option (Option : String) return Boolean
+   is
+      pragma Unreferenced (Option);
+   begin
+      return False;
+   end Decode_Option;
+
+   procedure Disp_Long_Help
+   is
+   begin
+      null;
+   end Disp_Long_Help;
+
+
+   procedure Register_Commands
+   is
+   begin
+      Ghdlcomp.Hooks := (Compile_Init'Access,
+                         Compile_Elab'Access,
+                         Set_Run_Options'Access,
+                         Run'Access,
+                         Decode_Option'Access,
+                         Disp_Long_Help'Access);
+      Ghdlcomp.Register_Commands;
+   end Register_Commands;
+end Ghdlsimul;