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

   1 ------------------------------------------------------------------------------
   2 --                                                                          --
   3 --                         GNAT COMPILER COMPONENTS                         --
   4 --                                                                          --
   5 --                    M L I B . T G T . S P E C I F I C                     --
   6 --                           (Alpha VMS Version)                            --
   7 --                                                                          --
   8 --                                 B o d y                                  --
   9 --                                                                          --
  10 --          Copyright (C) 2003-2008, 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 3,  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 COPYING3.  If not, go to --
  20 -- http://www.gnu.org/licenses for a complete copy of the license.          --
  21 --                                                                          --
  22 -- GNAT was originally developed  by the GNAT team at  New York University. --
  23 -- Extensive contributions were provided by Ada Core Technologies Inc.      --
  24 --                                                                          --
  25 ------------------------------------------------------------------------------
  26
  27 --  This is the Alpha VMS version of the body
  28
  29 with Ada.Characters.Handling; use Ada.Characters.Handling;
  30
  31 with MLib.Fil;
  32 with MLib.Utl;
  33
  34 with MLib.Tgt.VMS_Common;
  35 pragma Warnings (Off, MLib.Tgt.VMS_Common);
  36 --  MLib.Tgt.VMS_Common is with'ed only for elaboration purposes
  37
  38 with Opt;      use Opt;
  39 with Output;   use Output;
  40
  41 with GNAT.Directory_Operations; use GNAT.Directory_Operations;
  42
  43 with System;           use System;
  44 with System.Case_Util; use System.Case_Util;
  45 with System.CRTL;      use System.CRTL;
  46
  47 package body MLib.Tgt.Specific is
  48
  49    --  Non default subprogram. See comment in mlib-tgt.ads
  50
  51    procedure Build_Dynamic_Library
  52      (Ofiles       : Argument_List;
  53       Options      : Argument_List;
  54       Interfaces   : Argument_List;
  55       Lib_Filename : String;
  56       Lib_Dir      : String;
  57       Symbol_Data  : Symbol_Record;
  58       Driver_Name  : Name_Id := No_Name;
  59       Lib_Version  : String  := "";
  60       Auto_Init    : Boolean := False);
  61
  62    --  Local variables
  63
  64    Empty_Argument_List : aliased Argument_List := (1 .. 0 => null);
  65    Additional_Objects  : Argument_List_Access := Empty_Argument_List'Access;
  66    --  Used to add the generated auto-init object files for auto-initializing
  67    --  stand-alone libraries.
  68
  69    Macro_Name : constant String := "mcr gnu:[bin]gcc -c -x assembler";
  70    --  The name of the command to invoke the macro-assembler
  71
  72    VMS_Options : Argument_List := (1 .. 1 => null);
  73
  74    Gnatsym_Name : constant String := "gnatsym";
  75
  76    Gnatsym_Path : String_Access;
  77
  78    Arguments : Argument_List_Access := null;
  79    Last_Argument : Natural := 0;
  80
  81    Success : Boolean := False;
  82
  83    Shared_Libgcc : aliased String := "-shared-libgcc";
  84
  85    Shared_Libgcc_Switch : constant Argument_List :=
  86                             (1 => Shared_Libgcc'Access);
  87
  88    ---------------------------
  89    -- Build_Dynamic_Library --
  90    ---------------------------
  91
  92    procedure Build_Dynamic_Library
  93      (Ofiles       : Argument_List;
  94       Options      : Argument_List;
  95       Interfaces   : Argument_List;
  96       Lib_Filename : String;
  97       Lib_Dir      : String;
  98       Symbol_Data  : Symbol_Record;
  99       Driver_Name  : Name_Id := No_Name;
 100       Lib_Version  : String  := "";
 101       Auto_Init    : Boolean := False)
 102    is
 103
 104       Lib_File : constant String :=
 105                    Lib_Dir & Directory_Separator & "lib" &
 106                    Fil.Ext_To (Lib_Filename, DLL_Ext);
 107
 108       Opts      : Argument_List := Options;
 109       Last_Opt  : Natural       := Opts'Last;
 110       Opts2     : Argument_List (Options'Range);
 111       Last_Opt2 : Natural       := Opts2'First - 1;
 112
 113       Inter : constant Argument_List := Interfaces;
 114
 115       function Is_Interface (Obj_File : String) return Boolean;
 116       --  For a Stand-Alone Library, returns True if Obj_File is the object
 117       --  file name of an interface of the SAL. For other libraries, always
 118       --  return True.
 119
 120       function Option_File_Name return String;
 121       --  Returns Symbol_File, if not empty. Otherwise, returns "symvec.opt"
 122
 123       function Version_String return String;
 124       --  Returns Lib_Version if not empty and if Symbol_Data.Symbol_Policy is
 125       --  not Autonomous, otherwise returns "". When Symbol_Data.Symbol_Policy
 126       --  is Autonomous, fails gnatmake if Lib_Version is not the image of a
 127       --  positive number.
 128
 129       ------------------
 130       -- Is_Interface --
 131       ------------------
 132
 133       function Is_Interface (Obj_File : String) return Boolean is
 134          ALI : constant String :=
 135                  Fil.Ext_To
 136                   (Filename => To_Lower (Base_Name (Obj_File)),
 137                    New_Ext  => "ali");
 138
 139       begin
 140          if Inter'Length = 0 then
 141             return True;
 142
 143          elsif ALI'Length > 2 and then
 144                ALI (ALI'First .. ALI'First + 2) = "b__"
 145          then
 146             return True;
 147
 148          else
 149             for J in Inter'Range loop
 150                if Inter (J).all = ALI then
 151                   return True;
 152                end if;
 153             end loop;
 154
 155             return False;
 156          end if;
 157       end Is_Interface;
 158
 159       ----------------------
 160       -- Option_File_Name --
 161       ----------------------
 162
 163       function Option_File_Name return String is
 164       begin
 165          if Symbol_Data.Symbol_File = No_Path then
 166             return "symvec.opt";
 167          else
 168             Get_Name_String (Symbol_Data.Symbol_File);
 169             To_Lower (Name_Buffer (1 .. Name_Len));
 170             return Name_Buffer (1 .. Name_Len);
 171          end if;
 172       end Option_File_Name;
 173
 174       --------------------
 175       -- Version_String --
 176       --------------------
 177
 178       function Version_String return String is
 179          Version : Integer := 0;
 180
 181       begin
 182          if Lib_Version = ""
 183            or else Symbol_Data.Symbol_Policy /= Autonomous
 184          then
 185             return "";
 186
 187          else
 188             begin
 189                Version := Integer'Value (Lib_Version);
 190
 191                if Version <= 0 then
 192                   raise Constraint_Error;
 193                end if;
 194
 195                return Lib_Version;
 196
 197             exception
 198                when Constraint_Error =>
 199                   Fail ("illegal version """
 200                         & Lib_Version
 201                         & """ (on VMS version must be a positive number)");
 202                   return "";
 203             end;
 204          end if;
 205       end Version_String;
 206
 207       ---------------------
 208       -- Local Variables --
 209       ---------------------
 210
 211       Opt_File_Name  : constant String := Option_File_Name;
 212       Version        : constant String := Version_String;
 213       For_Linker_Opt : String_Access;
 214
 215    --  Start of processing for Build_Dynamic_Library
 216
 217    begin
 218       --  If option file name does not ends with ".opt", append "/OPTIONS"
 219       --  to its specification for the VMS linker.
 220
 221       if Opt_File_Name'Length > 4
 222         and then
 223           Opt_File_Name (Opt_File_Name'Last - 3 .. Opt_File_Name'Last) = ".opt"
 224       then
 225          For_Linker_Opt := new String'("--for-linker=" & Opt_File_Name);
 226       else
 227          For_Linker_Opt :=
 228            new String'("--for-linker=" & Opt_File_Name & "/OPTIONS");
 229       end if;
 230
 231       VMS_Options (VMS_Options'First) := For_Linker_Opt;
 232
 233       for J in Inter'Range loop
 234          To_Lower (Inter (J).all);
 235       end loop;
 236
 237       --  "gnatsym" is necessary for building the option file
 238
 239       if Gnatsym_Path = null then
 240          Gnatsym_Path := Locate_Exec_On_Path (Gnatsym_Name);
 241
 242          if Gnatsym_Path = null then
 243             Fail (Gnatsym_Name & " not found in path");
 244          end if;
 245       end if;
 246
 247       --  For auto-initialization of a stand-alone library, we create
 248       --  a macro-assembly file and we invoke the macro-assembler.
 249
 250       if Auto_Init then
 251          declare
 252             Macro_File_Name : constant String := Lib_Filename & "__init.asm";
 253             Macro_File      : File_Descriptor;
 254             Init_Proc       : String := Lib_Filename & "INIT";
 255             Popen_Result    : System.Address;
 256             Pclose_Result   : Integer;
 257             Len             : Natural;
 258             OK              : Boolean := True;
 259
 260             command  : constant String :=
 261                          Macro_Name & " " & Macro_File_Name & ASCII.NUL;
 262             --  The command to invoke the assembler on the generated auto-init
 263             --  assembly file.
 264
 265             mode : constant String := "r" & ASCII.NUL;
 266             --  The mode for the invocation of Popen
 267
 268          begin
 269             To_Upper (Init_Proc);
 270
 271             if Verbose_Mode then
 272                Write_Str ("Creating auto-init assembly file """);
 273                Write_Str (Macro_File_Name);
 274                Write_Line ("""");
 275             end if;
 276
 277             --  Create and write the auto-init assembly file
 278
 279             declare
 280                use ASCII;
 281
 282                --  Output a dummy transfer address for debugging
 283                --  followed by the LIB$INITIALIZE section.
 284
 285                Lines : constant String :=
 286                  HT & ".text" & LF &
 287                  HT & ".align 4" & LF &
 288                  HT & ".globl __main" & LF &
 289                  HT & ".ent __main" & LF &
 290                  "__main..en:" & LF &
 291                  HT & ".base $27" & LF &
 292                  HT & ".frame $29,0,$26,8" & LF &
 293                  HT & "ret $31,($26),1" & LF &
 294                  HT & ".link" & LF &
 295                  "__main:" & LF &
 296                  HT & ".pdesc __main..en,null" & LF &
 297                  HT & ".end __main" & LF & LF &
 298                  HT & ".section LIB$INITIALIZE,GBL,NOWRT" & LF &
 299                  HT & ".long " & Init_Proc & LF;
 300
 301             begin
 302                Macro_File := Create_File (Macro_File_Name, Text);
 303                OK := Macro_File /= Invalid_FD;
 304
 305                if OK then
 306                   Len := Write
 307                     (Macro_File, Lines (Lines'First)'Address,
 308                      Lines'Length);
 309                   OK := Len = Lines'Length;
 310                end if;
 311
 312                if OK then
 313                   Close (Macro_File, OK);
 314                end if;
 315
 316                if not OK then
 317                   Fail ("creation of auto-init assembly file """
 318                         & Macro_File_Name
 319                         & """ failed");
 320                end if;
 321             end;
 322
 323             --  Invoke the macro-assembler
 324
 325             if Verbose_Mode then
 326                Write_Str ("Assembling auto-init assembly file """);
 327                Write_Str (Macro_File_Name);
 328                Write_Line ("""");
 329             end if;
 330
 331             Popen_Result := popen (command (command'First)'Address,
 332                                    mode (mode'First)'Address);
 333
 334             if Popen_Result = Null_Address then
 335                Fail ("assembly of auto-init assembly file """
 336                      & Macro_File_Name
 337                      & """ failed");
 338             end if;
 339
 340             --  Wait for the end of execution of the macro-assembler
 341
 342             Pclose_Result := pclose (Popen_Result);
 343
 344             if Pclose_Result < 0 then
 345                Fail ("assembly of auto init assembly file """
 346                      & Macro_File_Name
 347                      & """ failed");
 348             end if;
 349
 350             --  Add the generated object file to the list of objects to be
 351             --  included in the library.
 352
 353             Additional_Objects :=
 354               new Argument_List'
 355                 (1 => new String'(Lib_Filename & "__init.obj"));
 356          end;
 357       end if;
 358
 359       --  Allocate the argument list and put the symbol file name, the
 360       --  reference (if any) and the policy (if not autonomous).
 361
 362       Arguments := new Argument_List (1 .. Ofiles'Length + 8);
 363
 364       Last_Argument := 0;
 365
 366       --  Verbosity
 367
 368       if Verbose_Mode then
 369          Last_Argument := Last_Argument + 1;
 370          Arguments (Last_Argument) := new String'("-v");
 371       end if;
 372
 373       --  Version number (major ID)
 374
 375       if Lib_Version /= "" then
 376          Last_Argument := Last_Argument + 1;
 377          Arguments (Last_Argument) := new String'("-V");
 378          Last_Argument := Last_Argument + 1;
 379          Arguments (Last_Argument) := new String'(Version);
 380       end if;
 381
 382       --  Symbol file
 383
 384       Last_Argument := Last_Argument + 1;
 385       Arguments (Last_Argument) := new String'("-s");
 386       Last_Argument := Last_Argument + 1;
 387       Arguments (Last_Argument) := new String'(Opt_File_Name);
 388
 389       --  Reference Symbol File
 390
 391       if Symbol_Data.Reference /= No_Path then
 392          Last_Argument := Last_Argument + 1;
 393          Arguments (Last_Argument) := new String'("-r");
 394          Last_Argument := Last_Argument + 1;
 395          Arguments (Last_Argument) :=
 396            new String'(Get_Name_String (Symbol_Data.Reference));
 397       end if;
 398
 399       --  Policy
 400
 401       case Symbol_Data.Symbol_Policy is
 402          when Autonomous =>
 403             null;
 404
 405          when Compliant =>
 406             Last_Argument := Last_Argument + 1;
 407             Arguments (Last_Argument) := new String'("-c");
 408
 409          when Controlled =>
 410             Last_Argument := Last_Argument + 1;
 411             Arguments (Last_Argument) := new String'("-C");
 412
 413          when Restricted =>
 414             Last_Argument := Last_Argument + 1;
 415             Arguments (Last_Argument) := new String'("-R");
 416
 417          when Direct =>
 418             Last_Argument := Last_Argument + 1;
 419             Arguments (Last_Argument) := new String'("-D");
 420
 421       end case;
 422
 423       --  Add each relevant object file
 424
 425       for Index in Ofiles'Range loop
 426          if Is_Interface (Ofiles (Index).all) then
 427             Last_Argument := Last_Argument + 1;
 428             Arguments (Last_Argument) := new String'(Ofiles (Index).all);
 429          end if;
 430       end loop;
 431
 432       --  Spawn gnatsym
 433
 434       Spawn (Program_Name => Gnatsym_Path.all,
 435              Args         => Arguments (1 .. Last_Argument),
 436              Success      => Success);
 437
 438       if not Success then
 439          Fail ("unable to create symbol file for library """
 440                & Lib_Filename
 441                & """");
 442       end if;
 443
 444       Free (Arguments);
 445
 446       --  Move all the -l switches from Opts to Opts2
 447
 448       declare
 449          Index : Natural := Opts'First;
 450          Opt   : String_Access;
 451
 452       begin
 453          while Index <= Last_Opt loop
 454             Opt := Opts (Index);
 455
 456             if Opt'Length > 2 and then
 457               Opt (Opt'First .. Opt'First + 1) = "-l"
 458             then
 459                if Index < Last_Opt then
 460                   Opts (Index .. Last_Opt - 1) :=
 461                     Opts (Index + 1 .. Last_Opt);
 462                end if;
 463
 464                Last_Opt := Last_Opt - 1;
 465
 466                Last_Opt2 := Last_Opt2 + 1;
 467                Opts2 (Last_Opt2) := Opt;
 468
 469             else
 470                Index := Index + 1;
 471             end if;
 472          end loop;
 473       end;
 474
 475       --  Invoke gcc to build the library
 476
 477       Utl.Gcc
 478         (Output_File => Lib_File,
 479          Objects     => Ofiles & Additional_Objects.all,
 480          Options     => VMS_Options,
 481          Options_2   => Shared_Libgcc_Switch &
 482                         Opts (Opts'First .. Last_Opt) &
 483                         Opts2 (Opts2'First .. Last_Opt2),
 484          Driver_Name => Driver_Name);
 485
 486       --  The auto-init object file need to be deleted, so that it will not
 487       --  be included in the library as a regular object file, otherwise
 488       --  it will be included twice when the library will be built next
 489       --  time, which may lead to errors.
 490
 491       if Auto_Init then
 492          declare
 493             Auto_Init_Object_File_Name : constant String :=
 494                                            Lib_Filename & "__init.obj";
 495             Disregard : Boolean;
 496
 497          begin
 498             if Verbose_Mode then
 499                Write_Str ("deleting auto-init object file """);
 500                Write_Str (Auto_Init_Object_File_Name);
 501                Write_Line ("""");
 502             end if;
 503
 504             Delete_File (Auto_Init_Object_File_Name, Success => Disregard);
 505          end;
 506       end if;
 507    end Build_Dynamic_Library;
 508
 509 --  Package initialization
 510
 511 begin
 512    Build_Dynamic_Library_Ptr    := Build_Dynamic_Library'Access;
 513 end MLib.Tgt.Specific;