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