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------------------------------------------------------------------------------

--                                                                          --

--                         GNAT COMPILER COMPONENTS                         --

--                                                                          --

--                                 M D L L                                  --

--                                                                          --

--                                 B o d y                                  --

--                                                                          --

--          Copyright (C) 1992-2007, 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.  See the GNU General Public License --

-- for  more details.  You should have  received  a copy of the GNU General --

-- Public License  distributed with GNAT; see file COPYING3.  If not, go to --

-- http://www.gnu.org/licenses for a complete copy of the license.          --

--                                                                          --

-- GNAT was originally developed  by the GNAT team at  New York University. --

-- Extensive contributions were provided by Ada Core Technologies Inc.      --

--                                                                          --

------------------------------------------------------------------------------

--  This package provides the core high level routines used by GNATDLL

--  to build Windows DLL.

with Ada.Text_IO;

with GNAT.Directory_Operations;

with MDLL.Utl;

with MDLL.Fil;

package body MDLL is

   use Ada;

   use GNAT;

   --  Convention used for the library names on Windows:

   --  DLL:            <name>.dll

   --  Import library: lib<name>.dll

   function Get_Dll_Name (Lib_Filename : String) return String;

   --  Returns <Lib_Filename> if it contains a file extension otherwise it

   --  returns <Lib_Filename>.dll.

   ---------------------------

   -- Build_Dynamic_Library --

   ---------------------------

   procedure Build_Dynamic_Library

     (Ofiles        : Argument_List;

      Afiles        : Argument_List;

      Options       : Argument_List;

      Bargs_Options : Argument_List;

      Largs_Options : Argument_List;

      Lib_Filename  : String;

      Def_Filename  : String;

      Lib_Address   : String  := "";

      Build_Import  : Boolean := False;

      Relocatable   : Boolean := False;

      Map_File      : Boolean := False)

   is

      use type OS_Lib.Argument_List;

      Base_Filename : constant String := MDLL.Fil.Ext_To (Lib_Filename);

      Def_File : aliased constant String := Def_Filename;

      Jnk_File : aliased          String := Base_Filename & ".jnk";

      Bas_File : aliased constant String := Base_Filename & ".base";

      Dll_File : aliased          String := Get_Dll_Name (Lib_Filename);

      Exp_File : aliased          String := Base_Filename & ".exp";

      Lib_File : aliased constant String := "lib" & Base_Filename & ".dll.a";

      Bas_Opt  : aliased String := "-Wl,--base-file," & Bas_File;

      Lib_Opt  : aliased String := "-mdll";

      Out_Opt  : aliased String := "-o";

      Adr_Opt  : aliased String := "-Wl,--image-base=" & Lib_Address;

      Map_Opt  : aliased String := "-Wl,-Map," & Lib_Filename & ".map";

      L_Afiles : Argument_List := Afiles;

      --  Local afiles list. This list can be reordered to ensure that the

      --  binder ALI file is not the first entry in this list.

      All_Options : constant Argument_List := Options & Largs_Options;

      procedure Build_Reloc_DLL;

      --  Build a relocatable DLL with only objects file specified. This uses

      --  the well known five step build (see GNAT User's Guide).

      procedure Ada_Build_Reloc_DLL;

      --  Build a relocatable DLL with Ada code. This uses the well known five

      --  step build (see GNAT User's Guide).

      procedure Build_Non_Reloc_DLL;

      --  Build a non relocatable DLL containing no Ada code

      procedure Ada_Build_Non_Reloc_DLL;

      --  Build a non relocatable DLL with Ada code

      ---------------------

      -- Build_Reloc_DLL --

      ---------------------

      procedure Build_Reloc_DLL is

         Objects_Exp_File : constant OS_Lib.Argument_List :=

                              Exp_File'Unchecked_Access & Ofiles;

         --  Objects plus the export table (.exp) file

         Success : Boolean;

         pragma Warnings (Off, Success);

      begin

         if not Quiet then

            Text_IO.Put_Line ("building relocatable DLL...");

            Text_IO.Put ("make " & Dll_File);

            if Build_Import then

               Text_IO.Put_Line (" and " & Lib_File);

            else

               Text_IO.New_Line;

            end if;

         end if;

         --  1) Build base file with objects files

         Utl.Gcc (Output_File => Jnk_File,

                  Files       => Ofiles,

                  Options     => All_Options,

                  Base_File   => Bas_File,

                  Build_Lib   => True);

         --  2) Build exp from base file

         Utl.Dlltool (Def_File, Dll_File, Lib_File,

                      Base_File    => Bas_File,

                      Exp_Table    => Exp_File,

                      Build_Import => False);

         --  3) Build base file with exp file and objects files

         Utl.Gcc (Output_File => Jnk_File,

                  Files       => Objects_Exp_File,

                  Options     => All_Options,

                  Base_File   => Bas_File,

                  Build_Lib   => True);

         --  4) Build new exp from base file and the lib file (.a)

         Utl.Dlltool (Def_File, Dll_File, Lib_File,

                      Base_File    => Bas_File,

                      Exp_Table    => Exp_File,

                      Build_Import => Build_Import);

         --  5) Build the dynamic library

         declare

            Params      : constant OS_Lib.Argument_List :=

                            Map_Opt'Unchecked_Access &

                            Adr_Opt'Unchecked_Access & All_Options;

            First_Param : Positive := Params'First + 1;

         begin

            if Map_File then

               First_Param := Params'First;

            end if;

            Utl.Gcc

              (Output_File => Dll_File,

               Files       => Objects_Exp_File,

               Options     => Params (First_Param .. Params'Last),

               Build_Lib   => True);

         end;

         OS_Lib.Delete_File (Exp_File, Success);

         OS_Lib.Delete_File (Bas_File, Success);

         OS_Lib.Delete_File (Jnk_File, Success);

      exception

         when others =>

            OS_Lib.Delete_File (Exp_File, Success);

            OS_Lib.Delete_File (Bas_File, Success);

            OS_Lib.Delete_File (Jnk_File, Success);

            raise;

      end Build_Reloc_DLL;

      -------------------------

      -- Ada_Build_Reloc_DLL --

      -------------------------

      procedure Ada_Build_Reloc_DLL is

         Success : Boolean;

         pragma Warnings (Off, Success);

      begin

         if not Quiet then

            Text_IO.Put_Line ("Building relocatable DLL...");

            Text_IO.Put ("make " & Dll_File);

            if Build_Import then

               Text_IO.Put_Line (" and " & Lib_File);

            else

               Text_IO.New_Line;

            end if;

         end if;

         --  1) Build base file with objects files

         Utl.Gnatbind (L_Afiles, Options & Bargs_Options);

         declare

            Params : constant OS_Lib.Argument_List :=

                       Out_Opt'Unchecked_Access &

                       Jnk_File'Unchecked_Access &

                       Lib_Opt'Unchecked_Access &

                       Bas_Opt'Unchecked_Access &

                       Ofiles &

                       All_Options;

         begin

            Utl.Gnatlink (L_Afiles (L_Afiles'Last).all, Params);

         end;

         --  2) Build exp from base file

         Utl.Dlltool (Def_File, Dll_File, Lib_File,

                      Base_File    => Bas_File,

                      Exp_Table    => Exp_File,

                      Build_Import => False);

         --  3) Build base file with exp file and objects files

         Utl.Gnatbind (L_Afiles, Options & Bargs_Options);

         declare

            Params : constant OS_Lib.Argument_List :=

                       Out_Opt'Unchecked_Access &

                       Jnk_File'Unchecked_Access &

                       Lib_Opt'Unchecked_Access &

                       Bas_Opt'Unchecked_Access &

                       Exp_File'Unchecked_Access &

                       Ofiles &

                       All_Options;

         begin

            Utl.Gnatlink (L_Afiles (L_Afiles'Last).all, Params);

         end;

         --  4) Build new exp from base file and the lib file (.a)

         Utl.Dlltool (Def_File, Dll_File, Lib_File,

                      Base_File    => Bas_File,

                      Exp_Table    => Exp_File,

                      Build_Import => Build_Import);

         --  5) Build the dynamic library

         Utl.Gnatbind (L_Afiles, Options & Bargs_Options);

         declare

            Params      : constant OS_Lib.Argument_List :=

                            Map_Opt'Unchecked_Access &

                            Out_Opt'Unchecked_Access &

                            Dll_File'Unchecked_Access &

                            Lib_Opt'Unchecked_Access &

                            Exp_File'Unchecked_Access &

                            Adr_Opt'Unchecked_Access &

                            Ofiles &

                            All_Options;

            First_Param : Positive := Params'First + 1;

         begin

            if Map_File then

               First_Param := Params'First;

            end if;

            Utl.Gnatlink

              (L_Afiles (L_Afiles'Last).all,

               Params (First_Param .. Params'Last));

         end;

         OS_Lib.Delete_File (Exp_File, Success);

         OS_Lib.Delete_File (Bas_File, Success);

         OS_Lib.Delete_File (Jnk_File, Success);

      exception

         when others =>

            OS_Lib.Delete_File (Exp_File, Success);

            OS_Lib.Delete_File (Bas_File, Success);

            OS_Lib.Delete_File (Jnk_File, Success);

            raise;

      end Ada_Build_Reloc_DLL;

      -------------------------

      -- Build_Non_Reloc_DLL --

      -------------------------

      procedure Build_Non_Reloc_DLL is

         Success : Boolean;

         pragma Warnings (Off, Success);

      begin

         if not Quiet then

            Text_IO.Put_Line ("building non relocatable DLL...");

            Text_IO.Put ("make " & Dll_File &

                         " using address " & Lib_Address);

            if Build_Import then

               Text_IO.Put_Line (" and " & Lib_File);

            else

               Text_IO.New_Line;

            end if;

         end if;

         --  Build exp table and the lib .a file

         Utl.Dlltool (Def_File, Dll_File, Lib_File,

                      Exp_Table    => Exp_File,

                      Build_Import => Build_Import);

         --  Build the DLL

         declare

            Params : OS_Lib.Argument_List :=

                       Adr_Opt'Unchecked_Access & All_Options;

         begin

            if Map_File then

               Params :=  Map_Opt'Unchecked_Access & Params;

            end if;

            Utl.Gcc (Output_File => Dll_File,

                     Files       => Exp_File'Unchecked_Access & Ofiles,

                     Options     => Params,

                     Build_Lib   => True);

         end;

         OS_Lib.Delete_File (Exp_File, Success);

      exception

         when others =>

            OS_Lib.Delete_File (Exp_File, Success);

            raise;

      end Build_Non_Reloc_DLL;

      -----------------------------

      -- Ada_Build_Non_Reloc_DLL --

      -----------------------------

      --  Build a non relocatable DLL with Ada code

      procedure Ada_Build_Non_Reloc_DLL is

         Success : Boolean;

         pragma Warnings (Off, Success);

      begin

         if not Quiet then

            Text_IO.Put_Line ("building non relocatable DLL...");

            Text_IO.Put ("make " & Dll_File &

                         " using address " & Lib_Address);

            if Build_Import then

               Text_IO.Put_Line (" and " & Lib_File);

            else

               Text_IO.New_Line;

            end if;

         end if;

         --  Build exp table and the lib .a file

         Utl.Dlltool (Def_File, Dll_File, Lib_File,

                      Exp_Table    => Exp_File,

                      Build_Import => Build_Import);

         --  Build the DLL

         Utl.Gnatbind (L_Afiles, Options & Bargs_Options);

         declare

            Params : OS_Lib.Argument_List :=

                       Out_Opt'Unchecked_Access &

                       Dll_File'Unchecked_Access &

                       Lib_Opt'Unchecked_Access &

                       Exp_File'Unchecked_Access &

                       Adr_Opt'Unchecked_Access &

                       Ofiles &

                       All_Options;

         begin

            if Map_File then

               Params := Map_Opt'Unchecked_Access & Params;

            end if;

            Utl.Gnatlink (L_Afiles (L_Afiles'Last).all, Params);

         end;

         OS_Lib.Delete_File (Exp_File, Success);

      exception

         when others =>

            OS_Lib.Delete_File (Exp_File, Success);

            raise;

      end Ada_Build_Non_Reloc_DLL;

   --  Start of processing for Build_Dynamic_Library

   begin

      --  On Windows the binder file must not be in the first position in the

      --  list. This is due to the way DLL's are built on Windows. We swap the

      --  first ali with the last one if it is the case.

      if L_Afiles'Length > 1 then

         declare

            Filename : constant String :=

                         Directory_Operations.Base_Name

                           (L_Afiles (L_Afiles'First).all);

            First    : constant Positive := Filename'First;

         begin

            if Filename (First .. First + 1) = "b~" then

               L_Afiles (L_Afiles'Last) := Afiles (Afiles'First);

               L_Afiles (L_Afiles'First) := Afiles (Afiles'Last);

            end if;

         end;

      end if;

      case Relocatable is

         when True =>

            if L_Afiles'Length = 0 then

               Build_Reloc_DLL;

            else

               Ada_Build_Reloc_DLL;

            end if;

         when False =>

            if L_Afiles'Length = 0 then

               Build_Non_Reloc_DLL;

            else

               Ada_Build_Non_Reloc_DLL;

            end if;

      end case;

   end Build_Dynamic_Library;

   --------------------------

   -- Build_Import_Library --

   --------------------------

   procedure Build_Import_Library

     (Lib_Filename : String;

      Def_Filename : String)

   is

      procedure Build_Import_Library (Lib_Filename : String);

      --  Build an import library. This is to build only a .a library to link

      --  against a DLL.

      --------------------------

      -- Build_Import_Library --

      --------------------------

      procedure Build_Import_Library (Lib_Filename : String) is

         function No_Lib_Prefix (Filename : String) return String;

         --  Return Filename without the lib prefix if present

         -------------------

         -- No_Lib_Prefix --

         -------------------

         function No_Lib_Prefix (Filename : String) return String is

         begin

            if Filename (Filename'First .. Filename'First + 2) = "lib" then

               return Filename (Filename'First + 3 .. Filename'Last);

            else

               return Filename;

            end if;

         end No_Lib_Prefix;

         --  Local variables

         Def_File      : String renames Def_Filename;

         Dll_File      : constant String := Get_Dll_Name (Lib_Filename);

         Base_Filename : constant String :=

                           MDLL.Fil.Ext_To (No_Lib_Prefix (Lib_Filename));

         Lib_File      : constant String := "lib" & Base_Filename & ".dll.a";

      --  Start of processing for Build_Import_Library

      begin

         if not Quiet then

            Text_IO.Put_Line ("Building import library...");

            Text_IO.Put_Line

              ("make " & Lib_File & " to use dynamic library " & Dll_File);

         end if;

         Utl.Dlltool

           (Def_File, Dll_File, Lib_File, Build_Import => True);

      end Build_Import_Library;

   --  Start of processing for Build_Import_Library

   begin

      Build_Import_Library (Lib_Filename);

   end Build_Import_Library;

   ------------------

   -- Get_Dll_Name --

   ------------------

   function Get_Dll_Name (Lib_Filename : String) return String is

   begin

      if MDLL.Fil.Get_Ext (Lib_Filename) = "" then

         return Lib_Filename & ".dll";

      else

         return Lib_Filename;

      end if;

   end Get_Dll_Name;

end MDLL;