gcc/ada/mlib-tgt-linux.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) 2001-2004, Free Software Foundation, 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 -- Extensive contributions were provided by Ada Core Technologies Inc.      --
  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 MLib.Fil;
  34 with MLib.Utl;
  35 with Namet;  use Namet;
  36 with Opt;
  37 with Output; use Output;
  38 with Prj.Com;
  39 with System;
  40
  41 package body MLib.Tgt is
  42
  43    use GNAT;
  44    use MLib;
  45
  46    No_Arguments        : aliased Argument_List         := (1 .. 0 => null);
  47    Empty_Argument_List : constant Argument_List_Access := No_Arguments'Access;
  48
  49    Wl_Init_String : aliased String         := "-Wl,-init";
  50    Wl_Init        : constant String_Access := Wl_Init_String'Access;
  51    Wl_Fini_String : aliased String         := "-Wl,-fini";
  52    Wl_Fini        : constant String_Access := Wl_Fini_String'Access;
  53
  54    Init_Fini_List :  constant Argument_List_Access :=
  55                        new Argument_List'(1 => Wl_Init,
  56                                           2 => null,
  57                                           3 => Wl_Fini,
  58                                           4 => null);
  59    --  Used to put switches for automatic elaboration/finalization
  60
  61    ---------------------
  62    -- Archive_Builder --
  63    ---------------------
  64
  65    function Archive_Builder return String is
  66    begin
  67       return "ar";
  68    end Archive_Builder;
  69
  70    -----------------------------
  71    -- Archive_Builder_Options --
  72    -----------------------------
  73
  74    function Archive_Builder_Options return String_List_Access is
  75    begin
  76       return new String_List'(1 => new String'("cr"));
  77    end Archive_Builder_Options;
  78
  79    -----------------
  80    -- Archive_Ext --
  81    -----------------
  82
  83    function Archive_Ext return  String is
  84    begin
  85       return "a";
  86    end Archive_Ext;
  87
  88    ---------------------
  89    -- Archive_Indexer --
  90    ---------------------
  91
  92    function Archive_Indexer return String is
  93    begin
  94       return "ranlib";
  95    end Archive_Indexer;
  96
  97    -----------------------------
  98    -- Archive_Indexer_Options --
  99    -----------------------------
 100
 101    function Archive_Indexer_Options return String_List_Access is
 102    begin
 103       return new String_List (1 .. 0);
 104    end Archive_Indexer_Options;
 105
 106    ---------------------------
 107    -- Build_Dynamic_Library --
 108    ---------------------------
 109
 110    procedure Build_Dynamic_Library
 111      (Ofiles       : Argument_List;
 112       Foreign      : Argument_List;
 113       Afiles       : Argument_List;
 114       Options      : Argument_List;
 115       Options_2    : Argument_List;
 116       Interfaces   : Argument_List;
 117       Lib_Filename : String;
 118       Lib_Dir      : String;
 119       Symbol_Data  : Symbol_Record;
 120       Driver_Name  : Name_Id := No_Name;
 121       Lib_Version  : String  := "";
 122       Auto_Init    : Boolean := False)
 123    is
 124       pragma Unreferenced (Foreign);
 125       pragma Unreferenced (Afiles);
 126       pragma Unreferenced (Interfaces);
 127       pragma Unreferenced (Symbol_Data);
 128
 129       Lib_File : constant String :=
 130                    Lib_Dir & Directory_Separator & "lib" &
 131                    Fil.Ext_To (Lib_Filename, DLL_Ext);
 132
 133       Version_Arg          : String_Access;
 134       Symbolic_Link_Needed : Boolean := False;
 135
 136       Init_Fini : Argument_List_Access := Empty_Argument_List;
 137
 138    begin
 139       if Opt.Verbose_Mode then
 140          Write_Str ("building relocatable shared library ");
 141          Write_Line (Lib_File);
 142       end if;
 143
 144       --  If specified, add automatic elaboration/finalization
 145
 146       if Auto_Init then
 147          Init_Fini := Init_Fini_List;
 148          Init_Fini (2) := new String'("-Wl," & Lib_Filename & "init");
 149          Init_Fini (4) := new String'("-Wl," & Lib_Filename & "final");
 150       end if;
 151
 152       if Lib_Version = "" then
 153          Utl.Gcc
 154            (Output_File => Lib_File,
 155             Objects     => Ofiles,
 156             Options     => Options & Init_Fini.all,
 157             Driver_Name => Driver_Name,
 158             Options_2   => Options_2);
 159
 160       else
 161          Version_Arg := new String'("-Wl,-soname," & Lib_Version);
 162
 163          if Is_Absolute_Path (Lib_Version) then
 164             Utl.Gcc
 165               (Output_File => Lib_Version,
 166                Objects     => Ofiles,
 167                Options     => Options & Version_Arg & Init_Fini.all,
 168                Driver_Name => Driver_Name,
 169                Options_2   => Options_2);
 170             Symbolic_Link_Needed := Lib_Version /= Lib_File;
 171
 172          else
 173             Utl.Gcc
 174               (Output_File => Lib_Dir & Directory_Separator & Lib_Version,
 175                Objects     => Ofiles,
 176                Options     => Options & Version_Arg & Init_Fini.all,
 177                Driver_Name => Driver_Name,
 178                Options_2   => Options_2);
 179             Symbolic_Link_Needed :=
 180               Lib_Dir & Directory_Separator & Lib_Version /= Lib_File;
 181          end if;
 182
 183          if Symbolic_Link_Needed then
 184             declare
 185                Success : Boolean;
 186                Oldpath : String (1 .. Lib_Version'Length + 1);
 187                Newpath : String (1 .. Lib_File'Length + 1);
 188
 189                Result : Integer;
 190                pragma Unreferenced (Result);
 191
 192                function Symlink
 193                  (Oldpath : System.Address;
 194                   Newpath : System.Address) return Integer;
 195                pragma Import (C, Symlink, "__gnat_symlink");
 196
 197             begin
 198                Oldpath (1 .. Lib_Version'Length) := Lib_Version;
 199                Oldpath (Oldpath'Last)            := ASCII.NUL;
 200                Newpath (1 .. Lib_File'Length)    := Lib_File;
 201                Newpath (Newpath'Last)            := ASCII.NUL;
 202
 203                Delete_File (Lib_File, Success);
 204
 205                Result := Symlink (Oldpath'Address, Newpath'Address);
 206             end;
 207          end if;
 208       end if;
 209    end Build_Dynamic_Library;
 210
 211    -------------
 212    -- DLL_Ext --
 213    -------------
 214
 215    function DLL_Ext return String is
 216    begin
 217       return "so";
 218    end DLL_Ext;
 219
 220    --------------------
 221    -- Dynamic_Option --
 222    --------------------
 223
 224    function Dynamic_Option return String is
 225    begin
 226       return "-shared";
 227    end Dynamic_Option;
 228
 229    -------------------
 230    -- Is_Object_Ext --
 231    -------------------
 232
 233    function Is_Object_Ext (Ext : String) return Boolean is
 234    begin
 235       return Ext = ".o";
 236    end Is_Object_Ext;
 237
 238    --------------
 239    -- Is_C_Ext --
 240    --------------
 241
 242    function Is_C_Ext (Ext : String) return Boolean is
 243    begin
 244       return Ext = ".c";
 245    end Is_C_Ext;
 246
 247    --------------------
 248    -- Is_Archive_Ext --
 249    --------------------
 250
 251    function Is_Archive_Ext (Ext : String) return Boolean is
 252    begin
 253       return Ext = ".a" or else Ext = ".so";
 254    end Is_Archive_Ext;
 255
 256    -------------
 257    -- Libgnat --
 258    -------------
 259
 260    function Libgnat return String is
 261    begin
 262       return "libgnat.a";
 263    end Libgnat;
 264
 265    ------------------------
 266    -- Library_Exists_For --
 267    ------------------------
 268
 269    function Library_Exists_For (Project : Project_Id) return Boolean is
 270    begin
 271       if not Projects.Table (Project).Library then
 272          Prj.Com.Fail ("INTERNAL ERROR: Library_Exists_For called " &
 273                        "for non library project");
 274          return False;
 275
 276       else
 277          declare
 278             Lib_Dir : constant String :=
 279               Get_Name_String (Projects.Table (Project).Library_Dir);
 280             Lib_Name : constant String :=
 281               Get_Name_String (Projects.Table (Project).Library_Name);
 282
 283          begin
 284             if Projects.Table (Project).Library_Kind = Static then
 285                return Is_Regular_File
 286                  (Lib_Dir & Directory_Separator & "lib" &
 287                   Fil.Ext_To (Lib_Name, Archive_Ext));
 288
 289             else
 290                return Is_Regular_File
 291                  (Lib_Dir & Directory_Separator & "lib" &
 292                   Fil.Ext_To (Lib_Name, DLL_Ext));
 293             end if;
 294          end;
 295       end if;
 296    end Library_Exists_For;
 297
 298    ---------------------------
 299    -- Library_File_Name_For --
 300    ---------------------------
 301
 302    function Library_File_Name_For (Project : Project_Id) return Name_Id is
 303    begin
 304       if not Projects.Table (Project).Library then
 305          Prj.Com.Fail ("INTERNAL ERROR: Library_File_Name_For called " &
 306                        "for non library project");
 307          return No_Name;
 308
 309       else
 310          declare
 311             Lib_Name : constant String :=
 312               Get_Name_String (Projects.Table (Project).Library_Name);
 313
 314          begin
 315             Name_Len := 3;
 316             Name_Buffer (1 .. Name_Len) := "lib";
 317
 318             if Projects.Table (Project).Library_Kind = Static then
 319                Add_Str_To_Name_Buffer (Fil.Ext_To (Lib_Name, Archive_Ext));
 320
 321             else
 322                Add_Str_To_Name_Buffer (Fil.Ext_To (Lib_Name, DLL_Ext));
 323             end if;
 324
 325             return Name_Find;
 326          end;
 327       end if;
 328    end Library_File_Name_For;
 329
 330    ----------------
 331    -- Object_Ext --
 332    ----------------
 333
 334    function Object_Ext return String is
 335    begin
 336       return "o";
 337    end Object_Ext;
 338
 339    ----------------
 340    -- PIC_Option --
 341    ----------------
 342
 343    function PIC_Option return String is
 344    begin
 345       return "-fPIC";
 346    end PIC_Option;
 347
 348    -----------------------------------------------
 349    -- Standalone_Library_Auto_Init_Is_Supported --
 350    -----------------------------------------------
 351
 352    function Standalone_Library_Auto_Init_Is_Supported return Boolean is
 353    begin
 354       return True;
 355    end Standalone_Library_Auto_Init_Is_Supported;
 356
 357    ---------------------------
 358    -- Support_For_Libraries --
 359    ---------------------------
 360
 361    function Support_For_Libraries return Library_Support is
 362    begin
 363       return Full;
 364    end Support_For_Libraries;
 365
 366 end MLib.Tgt;