gcc/ada/mlib-tgt-vms-alpha.adb

   1 ------------------------------------------------------------------------------
   2 --                                                                          --
   3 --                         GNAT COMPILER COMPONENTS                         --
   4 --                                                                          --
   5 --                             M L I B . T G T                              --
   6 --                           (Alpha VMS Version)                            --
   7 --                                                                          --
   8 --                                 B o d y                                  --
   9 --                                                                          --
  10 --          Copyright (C) 2003-2005, 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 is the Alpha VMS version of the body
  29
  30 with Ada.Characters.Handling; use Ada.Characters.Handling;
  31
  32 with GNAT.Directory_Operations; use GNAT.Directory_Operations;
  33 with GNAT.OS_Lib;               use GNAT.OS_Lib;
  34
  35 with MLib.Fil;
  36 with MLib.Utl;
  37 with Namet;    use Namet;
  38 with Opt;      use Opt;
  39 with Output;   use Output;
  40 with Prj.Com;
  41
  42 with System;           use System;
  43 with System.Case_Util; use System.Case_Util;
  44 with System.CRTL;      use System.CRTL;
  45
  46 package body MLib.Tgt is
  47
  48    use GNAT;
  49
  50    Empty_Argument_List : aliased Argument_List := (1 .. 0 => null);
  51    Additional_Objects  : Argument_List_Access := Empty_Argument_List'Access;
  52    --  Used to add the generated auto-init object files for auto-initializing
  53    --  stand-alone libraries.
  54
  55    Macro_Name : constant String := "mcr gnu:[bin]gcc -c -x assembler";
  56    --  The name of the command to invoke the macro-assembler
  57
  58    VMS_Options : Argument_List := (1 .. 1 => null);
  59
  60    Gnatsym_Name : constant String := "gnatsym";
  61
  62    Gnatsym_Path : String_Access;
  63
  64    Arguments : Argument_List_Access := null;
  65    Last_Argument : Natural := 0;
  66
  67    Success : Boolean := False;
  68
  69    Shared_Libgcc : aliased String := "-shared-libgcc";
  70
  71    No_Shared_Libgcc_Switch : aliased Argument_List := (1 .. 0 => null);
  72    Shared_Libgcc_Switch    : aliased Argument_List :=
  73                                (1 => Shared_Libgcc'Access);
  74    Link_With_Shared_Libgcc : Argument_List_Access :=
  75                                No_Shared_Libgcc_Switch'Access;
  76
  77    ---------------------
  78    -- Archive_Builder --
  79    ---------------------
  80
  81    function Archive_Builder return String is
  82    begin
  83       return "ar";
  84    end Archive_Builder;
  85
  86    -----------------------------
  87    -- Archive_Builder_Options --
  88    -----------------------------
  89
  90    function Archive_Builder_Options return String_List_Access is
  91    begin
  92       return new String_List'(1 => new String'("cr"));
  93    end Archive_Builder_Options;
  94
  95    -----------------
  96    -- Archive_Ext --
  97    -----------------
  98
  99    function Archive_Ext return String is
 100    begin
 101       return "olb";
 102    end Archive_Ext;
 103
 104    ---------------------
 105    -- Archive_Indexer --
 106    ---------------------
 107
 108    function Archive_Indexer return String is
 109    begin
 110       return "ranlib";
 111    end Archive_Indexer;
 112
 113    -----------------------------
 114    -- Archive_Indexer_Options --
 115    -----------------------------
 116
 117    function Archive_Indexer_Options return String_List_Access is
 118    begin
 119       return new String_List (1 .. 0);
 120    end Archive_Indexer_Options;
 121
 122    ---------------------------
 123    -- Build_Dynamic_Library --
 124    ---------------------------
 125
 126    procedure Build_Dynamic_Library
 127      (Ofiles       : Argument_List;
 128       Foreign      : Argument_List;
 129       Afiles       : Argument_List;
 130       Options      : Argument_List;
 131       Options_2    : Argument_List;
 132       Interfaces   : Argument_List;
 133       Lib_Filename : String;
 134       Lib_Dir      : String;
 135       Symbol_Data  : Symbol_Record;
 136       Driver_Name  : Name_Id := No_Name;
 137       Lib_Version  : String  := "";
 138       Auto_Init    : Boolean := False)
 139    is
 140       pragma Unreferenced (Foreign);
 141       pragma Unreferenced (Afiles);
 142
 143       Lib_File : constant String :=
 144                    Lib_Dir & Directory_Separator & "lib" &
 145                    Fil.Ext_To (Lib_Filename, DLL_Ext);
 146
 147       Opts      : Argument_List := Options;
 148       Last_Opt  : Natural       := Opts'Last;
 149       Opts2     : Argument_List (Options'Range);
 150       Last_Opt2 : Natural       := Opts2'First - 1;
 151
 152       Inter : constant Argument_List := Interfaces;
 153
 154       function Is_Interface (Obj_File : String) return Boolean;
 155       --  For a Stand-Alone Library, returns True if Obj_File is the object
 156       --  file name of an interface of the SAL. For other libraries, always
 157       --  return True.
 158
 159       function Option_File_Name return String;
 160       --  Returns Symbol_File, if not empty. Otherwise, returns "symvec.opt"
 161
 162       function Version_String return String;
 163       --  Returns Lib_Version if not empty and if Symbol_Data.Symbol_Policy is
 164       --  not Autonomous, otherwise returns "".
 165       --  When Symbol_Data.Symbol_Policy is Autonomous, fails gnatmake if
 166       --  Lib_Version is not the image of a positive number.
 167
 168       ------------------
 169       -- Is_Interface --
 170       ------------------
 171
 172       function Is_Interface (Obj_File : String) return Boolean is
 173          ALI : constant String :=
 174                  Fil.Ext_To
 175                   (Filename => To_Lower (Base_Name (Obj_File)),
 176                    New_Ext  => "ali");
 177
 178       begin
 179          if Inter'Length = 0 then
 180             return True;
 181
 182          elsif ALI'Length > 2 and then
 183                ALI (ALI'First .. ALI'First + 1) = "b$"
 184          then
 185             return True;
 186
 187          else
 188             for J in Inter'Range loop
 189                if Inter (J).all = ALI then
 190                   return True;
 191                end if;
 192             end loop;
 193
 194             return False;
 195          end if;
 196       end Is_Interface;
 197
 198       ----------------------
 199       -- Option_File_Name --
 200       ----------------------
 201
 202       function Option_File_Name return String is
 203       begin
 204          if Symbol_Data.Symbol_File = No_Name then
 205             return "symvec.opt";
 206          else
 207             Get_Name_String (Symbol_Data.Symbol_File);
 208             To_Lower (Name_Buffer (1 .. Name_Len));
 209             return Name_Buffer (1 .. Name_Len);
 210          end if;
 211       end Option_File_Name;
 212
 213       --------------------
 214       -- Version_String --
 215       --------------------
 216
 217       function Version_String return String is
 218          Version : Integer := 0;
 219       begin
 220          if Lib_Version = ""
 221            or else Symbol_Data.Symbol_Policy /= Autonomous
 222          then
 223             return "";
 224
 225          else
 226             begin
 227                Version := Integer'Value (Lib_Version);
 228
 229                if Version <= 0 then
 230                   raise Constraint_Error;
 231                end if;
 232
 233                return Lib_Version;
 234
 235             exception
 236                when Constraint_Error =>
 237                   Fail ("illegal version """, Lib_Version,
 238                         """ (on VMS version must be a positive number)");
 239                   return "";
 240             end;
 241          end if;
 242       end Version_String;
 243
 244       Opt_File_Name  : constant String := Option_File_Name;
 245       Version        : constant String := Version_String;
 246       For_Linker_Opt : String_Access;
 247
 248    --  Start of processing for Build_Dynamic_Library
 249
 250    begin
 251       --  Invoke gcc with -shared-libgcc, but only for GCC 3 or higher
 252
 253       if GCC_Version >= 3 then
 254          Link_With_Shared_Libgcc := Shared_Libgcc_Switch'Access;
 255       else
 256          Link_With_Shared_Libgcc := No_Shared_Libgcc_Switch'Access;
 257       end if;
 258
 259       --  If option file name does not ends with ".opt", append "/OPTIONS"
 260       --  to its specification for the VMS linker.
 261
 262       if Opt_File_Name'Length > 4
 263         and then
 264           Opt_File_Name (Opt_File_Name'Last - 3 .. Opt_File_Name'Last) = ".opt"
 265       then
 266          For_Linker_Opt := new String'("--for-linker=" & Opt_File_Name);
 267       else
 268          For_Linker_Opt :=
 269            new String'("--for-linker=" & Opt_File_Name & "/OPTIONS");
 270       end if;
 271
 272       VMS_Options (VMS_Options'First) := For_Linker_Opt;
 273
 274       for J in Inter'Range loop
 275          To_Lower (Inter (J).all);
 276       end loop;
 277
 278       --  "gnatsym" is necessary for building the option file
 279
 280       if Gnatsym_Path = null then
 281          Gnatsym_Path := OS_Lib.Locate_Exec_On_Path (Gnatsym_Name);
 282
 283          if Gnatsym_Path = null then
 284             Fail (Gnatsym_Name, " not found in path");
 285          end if;
 286       end if;
 287
 288       --  For auto-initialization of a stand-alone library, we create
 289       --  a macro-assembly file and we invoke the macro-assembler.
 290
 291       if Auto_Init then
 292          declare
 293             Macro_File_Name : constant String := Lib_Filename & "$init.asm";
 294             Macro_File      : File_Descriptor;
 295             Init_Proc       : String := Lib_Filename & "INIT";
 296             Popen_Result    : System.Address;
 297             Pclose_Result   : Integer;
 298             Len             : Natural;
 299             OK              : Boolean := True;
 300
 301             command  : constant String :=
 302                          Macro_Name & " " & Macro_File_Name & ASCII.NUL;
 303             --  The command to invoke the assembler on the generated auto-init
 304             --  assembly file.
 305
 306             mode : constant String := "r" & ASCII.NUL;
 307             --  The mode for the invocation of Popen
 308
 309          begin
 310             To_Upper (Init_Proc);
 311
 312             if Verbose_Mode then
 313                Write_Str ("Creating auto-init assembly file """);
 314                Write_Str (Macro_File_Name);
 315                Write_Line ("""");
 316             end if;
 317
 318             --  Create and write the auto-init assembly file
 319
 320             declare
 321                First_Line : constant String :=
 322                               ASCII.HT & ".section LIB$INITIALIZE,GBL,NOWRT" &
 323                ASCII.LF;
 324                Second_Line : constant String :=
 325                                ASCII.HT & ".long " & Init_Proc & ASCII.LF;
 326                --  First and second lines of the auto-init assembly file
 327
 328             begin
 329                Macro_File := Create_File (Macro_File_Name, Text);
 330                OK := Macro_File /= Invalid_FD;
 331
 332                if OK then
 333                   Len := Write
 334                     (Macro_File, First_Line (First_Line'First)'Address,
 335                      First_Line'Length);
 336                   OK := Len = First_Line'Length;
 337                end if;
 338
 339                if OK then
 340                   Len := Write
 341                     (Macro_File, Second_Line (Second_Line'First)'Address,
 342                      Second_Line'Length);
 343                   OK := Len = Second_Line'Length;
 344                end if;
 345
 346                if OK then
 347                   Close (Macro_File, OK);
 348                end if;
 349
 350                if not OK then
 351                   Fail ("creation of auto-init assembly file """,
 352                         Macro_File_Name, """ failed");
 353                end if;
 354             end;
 355
 356             --  Invoke the macro-assembler
 357
 358             if Verbose_Mode then
 359                Write_Str ("Assembling auto-init assembly file """);
 360                Write_Str (Macro_File_Name);
 361                Write_Line ("""");
 362             end if;
 363
 364             Popen_Result := popen (command (command'First)'Address,
 365                                    mode (mode'First)'Address);
 366
 367             if Popen_Result = Null_Address then
 368                Fail ("assembly of auto-init assembly file """,
 369                      Macro_File_Name, """ failed");
 370             end if;
 371
 372             --  Wait for the end of execution of the macro-assembler
 373
 374             Pclose_Result := pclose (Popen_Result);
 375
 376             if Pclose_Result < 0 then
 377                Fail ("assembly of auto init assembly file """,
 378                      Macro_File_Name, """ failed");
 379             end if;
 380
 381             --  Add the generated object file to the list of objects to be
 382             --  included in the library.
 383
 384             Additional_Objects :=
 385               new Argument_List'
 386                 (1 => new String'(Lib_Filename & "$init.obj"));
 387          end;
 388       end if;
 389
 390       --  Allocate the argument list and put the symbol file name, the
 391       --  reference (if any) and the policy (if not autonomous).
 392
 393       Arguments := new Argument_List (1 .. Ofiles'Length + 8);
 394
 395       Last_Argument := 0;
 396
 397       --  Verbosity
 398
 399       if Verbose_Mode then
 400          Last_Argument := Last_Argument + 1;
 401          Arguments (Last_Argument) := new String'("-v");
 402       end if;
 403
 404       --  Version number (major ID)
 405
 406       if Lib_Version /= "" then
 407          Last_Argument := Last_Argument + 1;
 408          Arguments (Last_Argument) := new String'("-V");
 409          Last_Argument := Last_Argument + 1;
 410          Arguments (Last_Argument) := new String'(Version);
 411       end if;
 412
 413       --  Symbol file
 414
 415       Last_Argument := Last_Argument + 1;
 416       Arguments (Last_Argument) := new String'("-s");
 417       Last_Argument := Last_Argument + 1;
 418       Arguments (Last_Argument) := new String'(Opt_File_Name);
 419
 420       --  Reference Symbol File
 421
 422       if Symbol_Data.Reference /= No_Name then
 423          Last_Argument := Last_Argument + 1;
 424          Arguments (Last_Argument) := new String'("-r");
 425          Last_Argument := Last_Argument + 1;
 426          Arguments (Last_Argument) :=
 427            new String'(Get_Name_String (Symbol_Data.Reference));
 428       end if;
 429
 430       --  Policy
 431
 432       case Symbol_Data.Symbol_Policy is
 433          when Autonomous =>
 434             null;
 435
 436          when Compliant =>
 437             Last_Argument := Last_Argument + 1;
 438             Arguments (Last_Argument) := new String'("-c");
 439
 440          when Controlled =>
 441             Last_Argument := Last_Argument + 1;
 442             Arguments (Last_Argument) := new String'("-C");
 443
 444          when Restricted =>
 445             Last_Argument := Last_Argument + 1;
 446             Arguments (Last_Argument) := new String'("-R");
 447       end case;
 448
 449       --  Add each relevant object file
 450
 451       for Index in Ofiles'Range loop
 452          if Is_Interface (Ofiles (Index).all) then
 453             Last_Argument := Last_Argument + 1;
 454             Arguments (Last_Argument) := new String'(Ofiles (Index).all);
 455          end if;
 456       end loop;
 457
 458       --  Spawn gnatsym
 459
 460       Spawn (Program_Name => Gnatsym_Path.all,
 461              Args         => Arguments (1 .. Last_Argument),
 462              Success      => Success);
 463
 464       if not Success then
 465          Fail ("unable to create symbol file for library """,
 466                Lib_Filename, """");
 467       end if;
 468
 469       Free (Arguments);
 470
 471       --  Move all the -l switches from Opts to Opts2
 472
 473       declare
 474          Index : Natural := Opts'First;
 475          Opt   : String_Access;
 476
 477       begin
 478          while Index <= Last_Opt loop
 479             Opt := Opts (Index);
 480
 481             if Opt'Length > 2 and then
 482               Opt (Opt'First .. Opt'First + 1) = "-l"
 483             then
 484                if Index < Last_Opt then
 485                   Opts (Index .. Last_Opt - 1) :=
 486                     Opts (Index + 1 .. Last_Opt);
 487                end if;
 488
 489                Last_Opt := Last_Opt - 1;
 490
 491                Last_Opt2 := Last_Opt2 + 1;
 492                Opts2 (Last_Opt2) := Opt;
 493
 494             else
 495                Index := Index + 1;
 496             end if;
 497          end loop;
 498       end;
 499
 500       --  Invoke gcc to build the library
 501
 502       Utl.Gcc
 503         (Output_File => Lib_File,
 504          Objects     => Ofiles & Additional_Objects.all,
 505          Options     => VMS_Options,
 506          Options_2   => Link_With_Shared_Libgcc.all &
 507                         Opts (Opts'First .. Last_Opt) &
 508                         Opts2 (Opts2'First .. Last_Opt2) & Options_2,
 509          Driver_Name => Driver_Name);
 510
 511       --  The auto-init object file need to be deleted, so that it will not
 512       --  be included in the library as a regular object file, otherwise
 513       --  it will be included twice when the library will be built next
 514       --  time, which may lead to errors.
 515
 516       if Auto_Init then
 517          declare
 518             Auto_Init_Object_File_Name : constant String :=
 519                                            Lib_Filename & "$init.obj";
 520             Disregard : Boolean;
 521
 522          begin
 523             if Verbose_Mode then
 524                Write_Str ("deleting auto-init object file """);
 525                Write_Str (Auto_Init_Object_File_Name);
 526                Write_Line ("""");
 527             end if;
 528
 529             Delete_File (Auto_Init_Object_File_Name, Success => Disregard);
 530          end;
 531       end if;
 532    end Build_Dynamic_Library;
 533
 534    -------------
 535    -- DLL_Ext --
 536    -------------
 537
 538    function DLL_Ext return String is
 539    begin
 540       return "exe";
 541    end DLL_Ext;
 542
 543    --------------------
 544    -- Dynamic_Option --
 545    --------------------
 546
 547    function Dynamic_Option return String is
 548    begin
 549       return "-shared";
 550    end Dynamic_Option;
 551
 552    -------------------
 553    -- Is_Object_Ext --
 554    -------------------
 555
 556    function Is_Object_Ext (Ext : String) return Boolean is
 557    begin
 558       return Ext = ".obj";
 559    end Is_Object_Ext;
 560
 561    --------------
 562    -- Is_C_Ext --
 563    --------------
 564
 565    function Is_C_Ext (Ext : String) return Boolean is
 566    begin
 567       return Ext = ".c";
 568    end Is_C_Ext;
 569
 570    --------------------
 571    -- Is_Archive_Ext --
 572    --------------------
 573
 574    function Is_Archive_Ext (Ext : String) return Boolean is
 575    begin
 576       return Ext = ".olb" or else Ext = ".exe";
 577    end Is_Archive_Ext;
 578
 579    -------------
 580    -- Libgnat --
 581    -------------
 582
 583    function Libgnat return String is
 584       Libgnat_A : constant String := "libgnat.a";
 585       Libgnat_Olb : constant String := "libgnat.olb";
 586
 587    begin
 588       Name_Len := Libgnat_A'Length;
 589       Name_Buffer (1 .. Name_Len) := Libgnat_A;
 590
 591       if Osint.Find_File (Name_Enter, Osint.Library) /= No_File then
 592          return Libgnat_A;
 593
 594       else
 595          return Libgnat_Olb;
 596       end if;
 597    end Libgnat;
 598
 599    ------------------------
 600    -- Library_Exists_For --
 601    ------------------------
 602
 603    function Library_Exists_For
 604      (Project : Project_Id; In_Tree : Project_Tree_Ref) return Boolean
 605    is
 606    begin
 607       if not In_Tree.Projects.Table (Project).Library then
 608          Fail ("INTERNAL ERROR: Library_Exists_For called " &
 609                "for non library project");
 610          return False;
 611
 612       else
 613          declare
 614             Lib_Dir : constant String :=
 615               Get_Name_String
 616                 (In_Tree.Projects.Table (Project).Library_Dir);
 617             Lib_Name : constant String :=
 618               Get_Name_String
 619                 (In_Tree.Projects.Table (Project).Library_Name);
 620
 621          begin
 622             if In_Tree.Projects.Table (Project).Library_Kind =
 623               Static
 624             then
 625                return Is_Regular_File
 626                  (Lib_Dir & Directory_Separator & "lib" &
 627                   Fil.Ext_To (Lib_Name, Archive_Ext));
 628
 629             else
 630                return Is_Regular_File
 631                  (Lib_Dir & Directory_Separator & "lib" &
 632                   Fil.Ext_To (Lib_Name, DLL_Ext));
 633             end if;
 634          end;
 635       end if;
 636    end Library_Exists_For;
 637
 638    ---------------------------
 639    -- Library_File_Name_For --
 640    ---------------------------
 641
 642    function Library_File_Name_For
 643      (Project : Project_Id;
 644       In_Tree : Project_Tree_Ref) return Name_Id
 645    is
 646    begin
 647       if not In_Tree.Projects.Table (Project).Library then
 648          Prj.Com.Fail ("INTERNAL ERROR: Library_File_Name_For called " &
 649                        "for non library project");
 650          return No_Name;
 651
 652       else
 653          declare
 654             Lib_Name : constant String :=
 655               Get_Name_String
 656                 (In_Tree.Projects.Table (Project).Library_Name);
 657
 658          begin
 659             Name_Len := 3;
 660             Name_Buffer (1 .. Name_Len) := "lib";
 661
 662             if In_Tree.Projects.Table (Project).Library_Kind =
 663               Static
 664             then
 665                Add_Str_To_Name_Buffer (Fil.Ext_To (Lib_Name, Archive_Ext));
 666
 667             else
 668                Add_Str_To_Name_Buffer (Fil.Ext_To (Lib_Name, DLL_Ext));
 669             end if;
 670
 671             return Name_Find;
 672          end;
 673       end if;
 674    end Library_File_Name_For;
 675
 676    ----------------
 677    -- Object_Ext --
 678    ----------------
 679
 680    function Object_Ext return String is
 681    begin
 682       return "obj";
 683    end Object_Ext;
 684
 685    ----------------
 686    -- PIC_Option --
 687    ----------------
 688
 689    function PIC_Option return String is
 690    begin
 691       return "";
 692    end PIC_Option;
 693
 694    -----------------------------------------------
 695    -- Standalone_Library_Auto_Init_Is_Supported --
 696    -----------------------------------------------
 697
 698    function Standalone_Library_Auto_Init_Is_Supported return Boolean is
 699    begin
 700       return True;
 701    end Standalone_Library_Auto_Init_Is_Supported;
 702
 703    ---------------------------
 704    -- Support_For_Libraries --
 705    ---------------------------
 706
 707    function Support_For_Libraries return Library_Support is
 708    begin
 709       return Full;
 710    end Support_For_Libraries;
 711
 712 end MLib.Tgt;