gcc/ada/5lml-tgt.adb

   1 ------------------------------------------------------------------------------
   2 --                                                                          --
   3 --                         GNAT COMPILER COMPONENTS                         --
   4 --                                                                          --
   5 --                             M L I B . T G T                              --
   6 --                           (GNU/Linux Version)                            --
   7 --                                                                          --
   8 --                                 B o d y                                  --
   9 --                                                                          --
  10 --                                                                          --
  11 --              Copyright (C) 2001, Ada Core Technologies, Inc.             --
  12 --                                                                          --
  13 -- GNAT is free software;  you can  redistribute it  and/or modify it under --
  14 -- terms of the  GNU General Public License as published  by the Free Soft- --
  15 -- ware  Foundation;  either version 2,  or (at your option) any later ver- --
  16 -- sion.  GNAT is distributed in the hope that it will be useful, but WITH- --
  17 -- OUT ANY WARRANTY;  without even the  implied warranty of MERCHANTABILITY --
  18 -- or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License --
  19 -- for  more details.  You should have  received  a copy of the GNU General --
  20 -- Public License  distributed with GNAT;  see file COPYING.  If not, write --
  21 -- to  the Free Software Foundation,  59 Temple Place - Suite 330,  Boston, --
  22 -- MA 02111-1307, USA.                                                      --
  23 --                                                                          --
  24 -- GNAT was originally developed  by the GNAT team at  New York University. --
  25 -- It is now maintained by Ada Core Technologies Inc (http://www.gnat.com). --
  26 --                                                                          --
  27 ------------------------------------------------------------------------------
  28
  29 --  This package provides a set of target dependent routines to build
  30 --  static, dynamic and shared libraries.
  31
  32 --  This is the GNU/Linux version of the body.
  33
  34 with Ada.Characters.Handling;   use Ada.Characters.Handling;
  35 with GNAT.Directory_Operations; use GNAT.Directory_Operations;
  36 with MLib.Fil;
  37 with MLib.Utl;
  38 with Namet;       use Namet;
  39 with Opt;
  40 with Osint;       use Osint;
  41 with Output;      use Output;
  42 with System;
  43
  44 package body MLib.Tgt is
  45
  46    use GNAT;
  47    use MLib;
  48
  49    --  ??? serious lack of comments below, all these declarations need to
  50    --  be commented, none are:
  51
  52    package Files renames MLib.Fil;
  53    package Tools renames MLib.Utl;
  54
  55    Args : Argument_List_Access := new Argument_List (1 .. 20);
  56    Last_Arg : Natural := 0;
  57
  58    Cp      : constant String_Access := Locate_Exec_On_Path ("cp");
  59    Force   : constant String_Access := new String'("-f");
  60
  61    procedure Add_Arg (Arg : String);
  62
  63    -------------
  64    -- Add_Arg --
  65    -------------
  66
  67    procedure Add_Arg (Arg : String) is
  68    begin
  69       if Last_Arg = Args'Last then
  70          declare
  71             New_Args : constant Argument_List_Access :=
  72                          new Argument_List (1 .. Args'Last * 2);
  73
  74          begin
  75             New_Args (Args'Range) := Args.all;
  76             Args := New_Args;
  77          end;
  78       end if;
  79
  80       Last_Arg := Last_Arg + 1;
  81       Args (Last_Arg) := new String'(Arg);
  82    end Add_Arg;
  83
  84    -----------------
  85    -- Archive_Ext --
  86    -----------------
  87
  88    function Archive_Ext return  String is
  89    begin
  90       return  "a";
  91    end Archive_Ext;
  92
  93    -----------------
  94    -- Base_Option --
  95    -----------------
  96
  97    function Base_Option return String is
  98    begin
  99       return "";
 100    end Base_Option;
 101
 102    ---------------------------
 103    -- Build_Dynamic_Library --
 104    ---------------------------
 105
 106    procedure Build_Dynamic_Library
 107      (Ofiles       : Argument_List;
 108       Foreign      : Argument_List;
 109       Afiles       : Argument_List;
 110       Options      : Argument_List;
 111       Lib_Filename : String;
 112       Lib_Dir      : String;
 113       Lib_Address  : String  := "";
 114       Lib_Version  : String  := "";
 115       Relocatable  : Boolean := False)
 116    is
 117       Lib_File : constant String :=
 118         Lib_Dir & Directory_Separator & "lib" &
 119         Files.Ext_To (Lib_Filename, DLL_Ext);
 120
 121       use type Argument_List;
 122       use type String_Access;
 123
 124       Version_Arg  : String_Access;
 125
 126       Symbolic_Link_Needed : Boolean := False;
 127
 128    begin
 129       if Opt.Verbose_Mode then
 130          Write_Str ("building relocatable shared library ");
 131          Write_Line (Lib_File);
 132       end if;
 133
 134       if Lib_Version = "" then
 135          Tools.Gcc
 136            (Output_File => Lib_File,
 137             Objects     => Ofiles,
 138             Options     => Options);
 139
 140       else
 141          Version_Arg := new String'("-Wl,-soname," & Lib_Version);
 142
 143          if Is_Absolute_Path (Lib_Version) then
 144             Tools.Gcc
 145               (Output_File => Lib_Version,
 146                Objects     => Ofiles,
 147                Options     => Options & Version_Arg);
 148             Symbolic_Link_Needed := Lib_Version /= Lib_File;
 149
 150          else
 151             Tools.Gcc
 152               (Output_File => Lib_Dir & Directory_Separator & Lib_Version,
 153                Objects     => Ofiles,
 154                Options     => Options & Version_Arg);
 155             Symbolic_Link_Needed :=
 156               Lib_Dir & Directory_Separator & Lib_Version /= Lib_File;
 157          end if;
 158
 159          if Symbolic_Link_Needed then
 160             declare
 161                Success : Boolean;
 162                Oldpath : String (1 .. Lib_Version'Length + 1);
 163                Newpath : String (1 .. Lib_File'Length + 1);
 164                Result  : Integer;
 165
 166                function Symlink
 167                  (Oldpath : System.Address;
 168                   Newpath : System.Address)
 169                   return    Integer;
 170                pragma Import (C, Symlink, "__gnat_symlink");
 171
 172             begin
 173                Oldpath (1 .. Lib_Version'Length) := Lib_Version;
 174                Oldpath (Oldpath'Last)            := ASCII.NUL;
 175                Newpath (1 .. Lib_File'Length)    := Lib_File;
 176                Newpath (Newpath'Last)            := ASCII.NUL;
 177
 178                Delete_File (Lib_File, Success);
 179
 180                Result := Symlink (Oldpath'Address, Newpath'Address);
 181             end;
 182          end if;
 183       end if;
 184    end Build_Dynamic_Library;
 185
 186    --------------------
 187    -- Copy_ALI_Files --
 188    --------------------
 189
 190    procedure Copy_ALI_Files
 191      (From : Name_Id;
 192       To   : Name_Id)
 193    is
 194       Dir      : Dir_Type;
 195       Name     : String (1 .. 1_000);
 196       Last     : Natural;
 197       Success  : Boolean;
 198       From_Dir : constant String := Get_Name_String (From);
 199       To_Dir   : constant String_Access :=
 200                    new String'(Get_Name_String (To));
 201
 202    begin
 203       Last_Arg := 0;
 204       Open (Dir, From_Dir);
 205
 206       loop
 207          Read (Dir, Name, Last);
 208          exit when Last = 0;
 209          if Last > 4
 210
 211            and then
 212            To_Lower (Name (Last - 3 .. Last)) = ".ali"
 213          then
 214             Add_Arg (From_Dir & Directory_Separator & Name (1 .. Last));
 215          end if;
 216       end loop;
 217
 218       if Last_Arg /= 0 then
 219          if not Opt.Quiet_Output then
 220             Write_Str ("cp -f ");
 221
 222             for J in 1 .. Last_Arg loop
 223                Write_Str (Args (J).all);
 224                Write_Char (' ');
 225             end loop;
 226
 227             Write_Line (To_Dir.all);
 228          end if;
 229
 230          Spawn (Cp.all,
 231                 Force & Args (1 .. Last_Arg) & To_Dir,
 232                 Success);
 233
 234          if not Success then
 235             Fail ("could not copy ALI files to library dir");
 236          end if;
 237       end if;
 238    end Copy_ALI_Files;
 239
 240    -------------------------
 241    -- Default_DLL_Address --
 242    -------------------------
 243
 244    function Default_DLL_Address return String is
 245    begin
 246       return "";
 247    end Default_DLL_Address;
 248
 249    -------------
 250    -- DLL_Ext --
 251    -------------
 252
 253    function DLL_Ext return String is
 254    begin
 255       return "so";
 256    end DLL_Ext;
 257
 258    --------------------
 259    -- Dynamic_Option --
 260    --------------------
 261
 262    function Dynamic_Option return String is
 263    begin
 264       return  "-shared";
 265    end Dynamic_Option;
 266
 267    -------------------
 268    -- Is_Object_Ext --
 269    -------------------
 270
 271    function Is_Object_Ext (Ext : String) return Boolean is
 272    begin
 273       return Ext = ".o";
 274    end Is_Object_Ext;
 275
 276    --------------
 277    -- Is_C_Ext --
 278    --------------
 279
 280    function Is_C_Ext (Ext : String) return Boolean is
 281    begin
 282       return Ext = ".c";
 283    end Is_C_Ext;
 284
 285    --------------------
 286    -- Is_Archive_Ext --
 287    --------------------
 288
 289    function Is_Archive_Ext (Ext : String) return Boolean is
 290    begin
 291       return Ext = ".a" or else Ext = ".so";
 292    end Is_Archive_Ext;
 293
 294    -------------
 295    -- Libgnat --
 296    -------------
 297
 298    function Libgnat return String is
 299    begin
 300       return "libgnat.a";
 301    end Libgnat;
 302
 303    -----------------------------
 304    -- Libraries_Are_Supported --
 305    -----------------------------
 306
 307    function Libraries_Are_Supported return Boolean is
 308    begin
 309       return True;
 310    end Libraries_Are_Supported;
 311
 312    --------------------------------
 313    -- Linker_Library_Path_Option --
 314    --------------------------------
 315
 316    function Linker_Library_Path_Option
 317      (Directory : String)
 318       return      String_Access
 319    is
 320    begin
 321       return new String'("-Wl,-rpath," & Directory);
 322    end Linker_Library_Path_Option;
 323
 324    ----------------
 325    -- Object_Ext --
 326    ----------------
 327
 328    function Object_Ext return String is
 329    begin
 330       return  "o";
 331    end Object_Ext;
 332
 333    ----------------
 334    -- PIC_Option --
 335    ----------------
 336
 337    function PIC_Option return String is
 338    begin
 339       return  "-fPIC";
 340    end PIC_Option;
 341
 342 end MLib.Tgt;