gcc/ada/mlib-tgt-darwin.adb

   1 ------------------------------------------------------------------------------
   2 --                                                                          --
   3 --                         GNAT COMPILER COMPONENTS                         --
   4 --                                                                          --
   5 --                             M L I B . T G T                              --
   6 --                             (Darwin Version)                             --
   7 --                                                                          --
   8 --                                 B o d y                                  --
   9 --                                                                          --
  10 --              Copyright (C) 2001-2005, 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 Darwin 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
  52    Init_Fini_List :  constant Argument_List_Access :=
  53                        new Argument_List'(1 => Wl_Init,
  54                                           2 => null);
  55    --  Used to put switches for automatic elaboration. Note that there is no
  56    --  linking option on Darwin for automatic finalization of a shared
  57    --  library.
  58
  59    ---------------------
  60    -- Archive_Builder --
  61    ---------------------
  62
  63    function Archive_Builder return String is
  64    begin
  65       return "ar";
  66    end Archive_Builder;
  67
  68    -----------------------------
  69    -- Archive_Builder_Options --
  70    -----------------------------
  71
  72    function Archive_Builder_Options return String_List_Access is
  73    begin
  74       return new String_List'(1 => new String'("cr"));
  75    end Archive_Builder_Options;
  76
  77    -----------------
  78    -- Archive_Ext --
  79    -----------------
  80
  81    function Archive_Ext return  String is
  82    begin
  83       return "a";
  84    end Archive_Ext;
  85
  86    ---------------------
  87    -- Archive_Indexer --
  88    ---------------------
  89
  90    function Archive_Indexer return String is
  91    begin
  92       return "ranlib";
  93    end Archive_Indexer;
  94
  95    -----------------------------
  96    -- Archive_Indexer_Options --
  97    -----------------------------
  98
  99    function Archive_Indexer_Options return String_List_Access is
 100    begin
 101       return new String_List'(1 => new String'("-c"));
 102    end Archive_Indexer_Options;
 103
 104    ---------------------------
 105    -- Build_Dynamic_Library --
 106    ---------------------------
 107
 108    procedure Build_Dynamic_Library
 109      (Ofiles       : Argument_List;
 110       Foreign      : Argument_List;
 111       Afiles       : Argument_List;
 112       Options      : Argument_List;
 113       Options_2    : Argument_List;
 114       Interfaces   : Argument_List;
 115       Lib_Filename : String;
 116       Lib_Dir      : String;
 117       Symbol_Data  : Symbol_Record;
 118       Driver_Name  : Name_Id := No_Name;
 119       Lib_Version  : String  := "";
 120       Auto_Init    : Boolean := False)
 121    is
 122       pragma Unreferenced (Foreign);
 123       pragma Unreferenced (Afiles);
 124       pragma Unreferenced (Interfaces);
 125       pragma Unreferenced (Symbol_Data);
 126
 127       Lib_File : constant String :=
 128                    Lib_Dir & Directory_Separator & "lib" &
 129                    Fil.Ext_To (Lib_Filename, DLL_Ext);
 130
 131       Version_Arg          : String_Access;
 132       Symbolic_Link_Needed : Boolean := False;
 133
 134       Init_Fini : Argument_List_Access := Empty_Argument_List;
 135
 136    begin
 137       if Opt.Verbose_Mode then
 138          Write_Str ("building relocatable shared library ");
 139          Write_Line (Lib_File);
 140       end if;
 141
 142       --  If specified, add automatic elaboration/finalization
 143
 144       if Auto_Init then
 145          Init_Fini := Init_Fini_List;
 146          Init_Fini (2) := new String'("-Wl,_" & Lib_Filename & "init");
 147       end if;
 148
 149       if Lib_Version = "" then
 150          Utl.Gcc
 151            (Output_File => Lib_File,
 152             Objects     => Ofiles,
 153             Options     => Options & Init_Fini.all,
 154             Driver_Name => Driver_Name,
 155             Options_2   => Options_2);
 156
 157       else
 158          --  Instruct the linker to build the shared library as a flat
 159          --  namespace image, which is not the default. The default is a two
 160          --  level namespace image.
 161
 162          Version_Arg := new String'("-Wl,-flat_namespace");
 163
 164          if Is_Absolute_Path (Lib_Version) then
 165             Utl.Gcc
 166               (Output_File => Lib_Version,
 167                Objects     => Ofiles,
 168                Options     => Options & Version_Arg & Init_Fini.all,
 169                Driver_Name => Driver_Name,
 170                Options_2   => Options_2);
 171             Symbolic_Link_Needed := Lib_Version /= Lib_File;
 172
 173          else
 174             Utl.Gcc
 175               (Output_File => Lib_Dir & Directory_Separator & Lib_Version,
 176                Objects     => Ofiles,
 177                Options     => Options & Version_Arg & Init_Fini.all,
 178                Driver_Name => Driver_Name,
 179                Options_2   => Options_2);
 180             Symbolic_Link_Needed :=
 181               Lib_Dir & Directory_Separator & Lib_Version /= Lib_File;
 182          end if;
 183
 184          if Symbolic_Link_Needed then
 185             declare
 186                Success : Boolean;
 187                Oldpath : String (1 .. Lib_Version'Length + 1);
 188                Newpath : String (1 .. Lib_File'Length + 1);
 189
 190                Result : Integer;
 191                pragma Unreferenced (Result);
 192
 193                function Symlink
 194                  (Oldpath : System.Address;
 195                   Newpath : System.Address) return Integer;
 196                pragma Import (C, Symlink, "__gnat_symlink");
 197
 198             begin
 199                Oldpath (1 .. Lib_Version'Length) := Lib_Version;
 200                Oldpath (Oldpath'Last)            := ASCII.NUL;
 201                Newpath (1 .. Lib_File'Length)    := Lib_File;
 202                Newpath (Newpath'Last)            := ASCII.NUL;
 203
 204                Delete_File (Lib_File, Success);
 205
 206                Result := Symlink (Oldpath'Address, Newpath'Address);
 207             end;
 208          end if;
 209       end if;
 210    end Build_Dynamic_Library;
 211
 212    -------------
 213    -- DLL_Ext --
 214    -------------
 215
 216    function DLL_Ext return String is
 217    begin
 218       return "dylib";
 219    end DLL_Ext;
 220
 221    --------------------
 222    -- Dynamic_Option --
 223    --------------------
 224
 225    function Dynamic_Option return String is
 226    begin
 227       return "-dynamiclib";
 228    end Dynamic_Option;
 229
 230    -------------------
 231    -- Is_Object_Ext --
 232    -------------------
 233
 234    function Is_Object_Ext (Ext : String) return Boolean is
 235    begin
 236       return Ext = ".o";
 237    end Is_Object_Ext;
 238
 239    --------------
 240    -- Is_C_Ext --
 241    --------------
 242
 243    function Is_C_Ext (Ext : String) return Boolean is
 244    begin
 245       return Ext = ".c";
 246    end Is_C_Ext;
 247
 248    --------------------
 249    -- Is_Archive_Ext --
 250    --------------------
 251
 252    function Is_Archive_Ext (Ext : String) return Boolean is
 253    begin
 254       return Ext = ".dylib" or else Ext = ".a";
 255    end Is_Archive_Ext;
 256
 257    -------------
 258    -- Libgnat --
 259    -------------
 260
 261    function Libgnat return String is
 262    begin
 263       return "libgnat.a";
 264    end Libgnat;
 265
 266    ------------------------
 267    -- Library_Exists_For --
 268    ------------------------
 269
 270    function Library_Exists_For
 271      (Project : Project_Id; In_Tree : Project_Tree_Ref) return Boolean
 272    is
 273    begin
 274       if not In_Tree.Projects.Table (Project).Library then
 275          Prj.Com.Fail ("INTERNAL ERROR: Library_Exists_For called " &
 276                        "for non library project");
 277          return False;
 278
 279       else
 280          declare
 281             Lib_Dir : constant String :=
 282               Get_Name_String
 283                 (In_Tree.Projects.Table (Project).Library_Dir);
 284             Lib_Name : constant String :=
 285               Get_Name_String
 286                 (In_Tree.Projects.Table (Project).Library_Name);
 287
 288          begin
 289             if In_Tree.Projects.Table (Project).Library_Kind =
 290               Static
 291             then
 292                return Is_Regular_File
 293                  (Lib_Dir & Directory_Separator & "lib" &
 294                   Fil.Ext_To (Lib_Name, Archive_Ext));
 295
 296             else
 297                return Is_Regular_File
 298                  (Lib_Dir & Directory_Separator & "lib" &
 299                   Fil.Ext_To (Lib_Name, DLL_Ext));
 300             end if;
 301          end;
 302       end if;
 303    end Library_Exists_For;
 304
 305    ---------------------------
 306    -- Library_File_Name_For --
 307    ---------------------------
 308
 309    function Library_File_Name_For
 310      (Project : Project_Id;
 311       In_Tree : Project_Tree_Ref) return Name_Id
 312    is
 313    begin
 314       if not In_Tree.Projects.Table (Project).Library then
 315          Prj.Com.Fail ("INTERNAL ERROR: Library_File_Name_For called " &
 316                        "for non library project");
 317          return No_Name;
 318
 319       else
 320          declare
 321             Lib_Name : constant String :=
 322               Get_Name_String
 323                 (In_Tree.Projects.Table (Project).Library_Name);
 324
 325          begin
 326             Name_Len := 3;
 327             Name_Buffer (1 .. Name_Len) := "lib";
 328
 329             if In_Tree.Projects.Table (Project).Library_Kind =
 330               Static then
 331                Add_Str_To_Name_Buffer (Fil.Ext_To (Lib_Name, Archive_Ext));
 332
 333             else
 334                Add_Str_To_Name_Buffer (Fil.Ext_To (Lib_Name, DLL_Ext));
 335             end if;
 336
 337             return Name_Find;
 338          end;
 339       end if;
 340    end Library_File_Name_For;
 341
 342    ----------------
 343    -- Object_Ext --
 344    ----------------
 345
 346    function Object_Ext return String is
 347    begin
 348       return "o";
 349    end Object_Ext;
 350
 351    ----------------
 352    -- PIC_Option --
 353    ----------------
 354
 355    function PIC_Option return String is
 356    begin
 357       return "-fPIC";
 358    end PIC_Option;
 359
 360    -----------------------------------------------
 361    -- Standalone_Library_Auto_Init_Is_Supported --
 362    -----------------------------------------------
 363
 364    function Standalone_Library_Auto_Init_Is_Supported return Boolean is
 365    begin
 366       return True;
 367    end Standalone_Library_Auto_Init_Is_Supported;
 368
 369    ---------------------------
 370    -- Support_For_Libraries --
 371    ---------------------------
 372
 373    function Support_For_Libraries return Library_Support is
 374    begin
 375       return Full;
 376    end Support_For_Libraries;
 377
 378 end MLib.Tgt;