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) 2003-2011, 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; use MLib.Tgt.VMS_Common;
  35
  36 with Opt;      use Opt;
  37 with Output;   use Output;
  38
  39 with GNAT.Directory_Operations; use GNAT.Directory_Operations;
  40
  41 with System;           use System;
  42 with System.Case_Util; use System.Case_Util;
  43 with System.CRTL;      use System.CRTL;
  44
  45 package body MLib.Tgt.Specific is
  46
  47    --  Non default subprogram. See comment in mlib-tgt.ads
  48
  49    procedure Build_Dynamic_Library
  50      (Ofiles       : Argument_List;
  51       Options      : Argument_List;
  52       Interfaces   : Argument_List;
  53       Lib_Filename : String;
  54       Lib_Dir      : String;
  55       Symbol_Data  : Symbol_Record;
  56       Driver_Name  : Name_Id := No_Name;
  57       Lib_Version  : String  := "";
  58       Auto_Init    : Boolean := False);
  59
  60    --  Local variables
  61
  62    Empty_Argument_List : aliased Argument_List := (1 .. 0 => null);
  63    Additional_Objects  : Argument_List_Access := Empty_Argument_List'Access;
  64    --  Used to add the generated auto-init object files for auto-initializing
  65    --  stand-alone libraries.
  66
  67    Macro_Name : constant String := "mcr gnu:[bin]gcc -c -x assembler";
  68    --  The name of the command to invoke the macro-assembler
  69
  70    VMS_Options : Argument_List := (1 .. 1 => null);
  71
  72    Gnatsym_Name : constant String := "gnatsym";
  73
  74    Gnatsym_Path : String_Access;
  75
  76    Arguments : Argument_List_Access := null;
  77    Last_Argument : Natural := 0;
  78
  79    Success : Boolean := False;
  80
  81    Shared_Libgcc : aliased String := "-shared-libgcc";
  82
  83    Shared_Libgcc_Switch : constant Argument_List :=
  84                             (1 => Shared_Libgcc'Access);
  85
  86    ---------------------------
  87    -- Build_Dynamic_Library --
  88    ---------------------------
  89
  90    procedure Build_Dynamic_Library
  91      (Ofiles       : Argument_List;
  92       Options      : Argument_List;
  93       Interfaces   : Argument_List;
  94       Lib_Filename : String;
  95       Lib_Dir      : String;
  96       Symbol_Data  : Symbol_Record;
  97       Driver_Name  : Name_Id := No_Name;
  98       Lib_Version  : String  := "";
  99       Auto_Init    : Boolean := False)
 100    is
 101
 102       Lib_File : constant String :=
 103                    Lib_Dir & Directory_Separator & "lib" &
 104                    Fil.Ext_To (Lib_Filename, DLL_Ext);
 105
 106       Opts      : Argument_List := Options;
 107       Last_Opt  : Natural       := Opts'Last;
 108       Opts2     : Argument_List (Options'Range);
 109       Last_Opt2 : Natural       := Opts2'First - 1;
 110
 111       Inter : constant Argument_List := Interfaces;
 112
 113       function Is_Interface (Obj_File : String) return Boolean;
 114       --  For a Stand-Alone Library, returns True if Obj_File is the object
 115       --  file name of an interface of the SAL. For other libraries, always
 116       --  return True.
 117
 118       function Option_File_Name return String;
 119       --  Returns Symbol_File, if not empty. Otherwise, returns "symvec.opt"
 120
 121       function Version_String return String;
 122       --  Returns Lib_Version if not empty and if Symbol_Data.Symbol_Policy is
 123       --  not Autonomous, otherwise returns "". When Symbol_Data.Symbol_Policy
 124       --  is Autonomous, fails gnatmake if Lib_Version is not the image of a
 125       --  positive number.
 126
 127       ------------------
 128       -- Is_Interface --
 129       ------------------
 130
 131       function Is_Interface (Obj_File : String) return Boolean is
 132          ALI : constant String :=
 133                  Fil.Ext_To
 134                   (Filename => To_Lower (Base_Name (Obj_File)),
 135                    New_Ext  => "ali");
 136
 137       begin
 138          if Inter'Length = 0 then
 139             return True;
 140
 141          elsif ALI'Length > 2 and then
 142                ALI (ALI'First .. ALI'First + 2) = "b__"
 143          then
 144             return True;
 145
 146          else
 147             for J in Inter'Range loop
 148                if Inter (J).all = ALI then
 149                   return True;
 150                end if;
 151             end loop;
 152
 153             return False;
 154          end if;
 155       end Is_Interface;
 156
 157       ----------------------
 158       -- Option_File_Name --
 159       ----------------------
 160
 161       function Option_File_Name return String is
 162       begin
 163          if Symbol_Data.Symbol_File = No_Path then
 164             return "symvec.opt";
 165          else
 166             Get_Name_String (Symbol_Data.Symbol_File);
 167             To_Lower (Name_Buffer (1 .. Name_Len));
 168             return Name_Buffer (1 .. Name_Len);
 169          end if;
 170       end Option_File_Name;
 171
 172       --------------------
 173       -- Version_String --
 174       --------------------
 175
 176       function Version_String return String is
 177          Version : Integer := 0;
 178
 179       begin
 180          if Lib_Version = ""
 181            or else Symbol_Data.Symbol_Policy /= Autonomous
 182          then
 183             return "";
 184
 185          else
 186             begin
 187                Version := Integer'Value (Lib_Version);
 188
 189                if Version <= 0 then
 190                   raise Constraint_Error;
 191                end if;
 192
 193                return Lib_Version;
 194
 195             exception
 196                when Constraint_Error =>
 197                   Fail ("illegal version """
 198                         & Lib_Version
 199                         & """ (on VMS version must be a positive number)");
 200                   return "";
 201             end;
 202          end if;
 203       end Version_String;
 204
 205       ---------------------
 206       -- Local Variables --
 207       ---------------------
 208
 209       Opt_File_Name  : constant String := Option_File_Name;
 210       Version        : constant String := Version_String;
 211       For_Linker_Opt : String_Access;
 212
 213    --  Start of processing for Build_Dynamic_Library
 214
 215    begin
 216       --  If option file name does not ends with ".opt", append "/OPTIONS"
 217       --  to its specification for the VMS linker.
 218
 219       if Opt_File_Name'Length > 4
 220         and then
 221           Opt_File_Name (Opt_File_Name'Last - 3 .. Opt_File_Name'Last) = ".opt"
 222       then
 223          For_Linker_Opt := new String'("--for-linker=" & Opt_File_Name);
 224       else
 225          For_Linker_Opt :=
 226            new String'("--for-linker=" & Opt_File_Name & "/OPTIONS");
 227       end if;
 228
 229       VMS_Options (VMS_Options'First) := For_Linker_Opt;
 230
 231       for J in Inter'Range loop
 232          To_Lower (Inter (J).all);
 233       end loop;
 234
 235       --  "gnatsym" is necessary for building the option file
 236
 237       if Gnatsym_Path = null then
 238          Gnatsym_Path := Locate_Exec_On_Path (Gnatsym_Name);
 239
 240          if Gnatsym_Path = null then
 241             Fail (Gnatsym_Name & " not found in path");
 242          end if;
 243       end if;
 244
 245       --  For auto-initialization of a stand-alone library, we create
 246       --  a macro-assembly file and we invoke the macro-assembler.
 247
 248       if Auto_Init then
 249          declare
 250             Macro_File_Name : constant String := Lib_Filename & "__init.asm";
 251             Macro_File      : File_Descriptor;
 252             Init_Proc       : constant String := Init_Proc_Name (Lib_Filename);
 253             Popen_Result    : System.Address;
 254             Pclose_Result   : Integer;
 255             Len             : Natural;
 256             OK              : Boolean := True;
 257
 258             command  : constant String :=
 259                          Macro_Name & " " & Macro_File_Name & ASCII.NUL;
 260             --  The command to invoke the assembler on the generated auto-init
 261             --  assembly file.
 262
 263             mode : constant String := "r" & ASCII.NUL;
 264             --  The mode for the invocation of Popen
 265
 266          begin
 267             if Verbose_Mode then
 268                Write_Str ("Creating auto-init assembly file """);
 269                Write_Str (Macro_File_Name);
 270                Write_Line ("""");
 271             end if;
 272
 273             --  Create and write the auto-init assembly file
 274
 275             declare
 276                use ASCII;
 277
 278                --  Output a dummy transfer address for debugging
 279                --  followed by the LIB$INITIALIZE section.
 280
 281                Lines : constant String :=
 282                  HT & ".text" & LF &
 283                  HT & ".align 4" & LF &
 284                  HT & ".globl __main" & LF &
 285                  HT & ".ent __main" & LF &
 286                  "__main..en:" & LF &
 287                  HT & ".base $27" & LF &
 288                  HT & ".frame $29,0,$26,8" & LF &
 289                  HT & "ret $31,($26),1" & LF &
 290                  HT & ".link" & LF &
 291                  "__main:" & LF &
 292                  HT & ".pdesc __main..en,null" & LF &
 293                  HT & ".end __main" & LF & LF &
 294                  HT & ".section LIB$INITIALIZE,GBL,NOWRT" & LF &
 295                  HT & ".long " & Init_Proc & LF;
 296
 297             begin
 298                Macro_File := Create_File (Macro_File_Name, Text);
 299                OK := Macro_File /= Invalid_FD;
 300
 301                if OK then
 302                   Len := Write
 303                     (Macro_File, Lines (Lines'First)'Address,
 304                      Lines'Length);
 305                   OK := Len = Lines'Length;
 306                end if;
 307
 308                if OK then
 309                   Close (Macro_File, OK);
 310                end if;
 311
 312                if not OK then
 313                   Fail ("creation of auto-init assembly file """
 314                         & Macro_File_Name
 315                         & """ failed");
 316                end if;
 317             end;
 318
 319             --  Invoke the macro-assembler
 320
 321             if Verbose_Mode then
 322                Write_Str ("Assembling auto-init assembly file """);
 323                Write_Str (Macro_File_Name);
 324                Write_Line ("""");
 325             end if;
 326
 327             Popen_Result := popen (command (command'First)'Address,
 328                                    mode (mode'First)'Address);
 329
 330             if Popen_Result = Null_Address then
 331                Fail ("assembly of auto-init assembly file """
 332                      & Macro_File_Name
 333                      & """ failed");
 334             end if;
 335
 336             --  Wait for the end of execution of the macro-assembler
 337
 338             Pclose_Result := pclose (Popen_Result);
 339
 340             if Pclose_Result < 0 then
 341                Fail ("assembly of auto init assembly file """
 342                      & Macro_File_Name
 343                      & """ failed");
 344             end if;
 345
 346             --  Add the generated object file to the list of objects to be
 347             --  included in the library.
 348
 349             Additional_Objects :=
 350               new Argument_List'
 351                 (1 => new String'(Lib_Filename & "__init.obj"));
 352          end;
 353       end if;
 354
 355       --  Allocate the argument list and put the symbol file name, the
 356       --  reference (if any) and the policy (if not autonomous).
 357
 358       Arguments := new Argument_List (1 .. Ofiles'Length + 8);
 359
 360       Last_Argument := 0;
 361
 362       --  Verbosity
 363
 364       if Verbose_Mode then
 365          Last_Argument := Last_Argument + 1;
 366          Arguments (Last_Argument) := new String'("-v");
 367       end if;
 368
 369       --  Version number (major ID)
 370
 371       if Lib_Version /= "" then
 372          Last_Argument := Last_Argument + 1;
 373          Arguments (Last_Argument) := new String'("-V");
 374          Last_Argument := Last_Argument + 1;
 375          Arguments (Last_Argument) := new String'(Version);
 376       end if;
 377
 378       --  Symbol file
 379
 380       Last_Argument := Last_Argument + 1;
 381       Arguments (Last_Argument) := new String'("-s");
 382       Last_Argument := Last_Argument + 1;
 383       Arguments (Last_Argument) := new String'(Opt_File_Name);
 384
 385       --  Reference Symbol File
 386
 387       if Symbol_Data.Reference /= No_Path then
 388          Last_Argument := Last_Argument + 1;
 389          Arguments (Last_Argument) := new String'("-r");
 390          Last_Argument := Last_Argument + 1;
 391          Arguments (Last_Argument) :=
 392            new String'(Get_Name_String (Symbol_Data.Reference));
 393       end if;
 394
 395       --  Policy
 396
 397       case Symbol_Data.Symbol_Policy is
 398          when Autonomous =>
 399             null;
 400
 401          when Compliant =>
 402             Last_Argument := Last_Argument + 1;
 403             Arguments (Last_Argument) := new String'("-c");
 404
 405          when Controlled =>
 406             Last_Argument := Last_Argument + 1;
 407             Arguments (Last_Argument) := new String'("-C");
 408
 409          when Restricted =>
 410             Last_Argument := Last_Argument + 1;
 411             Arguments (Last_Argument) := new String'("-R");
 412
 413          when Direct =>
 414             Last_Argument := Last_Argument + 1;
 415             Arguments (Last_Argument) := new String'("-D");
 416
 417       end case;
 418
 419       --  Add each relevant object file
 420
 421       for Index in Ofiles'Range loop
 422          if Is_Interface (Ofiles (Index).all) then
 423             Last_Argument := Last_Argument + 1;
 424             Arguments (Last_Argument) := new String'(Ofiles (Index).all);
 425          end if;
 426       end loop;
 427
 428       --  Spawn gnatsym
 429
 430       Spawn (Program_Name => Gnatsym_Path.all,
 431              Args         => Arguments (1 .. Last_Argument),
 432              Success      => Success);
 433
 434       if not Success then
 435          Fail ("unable to create symbol file for library """
 436                & Lib_Filename
 437                & """");
 438       end if;
 439
 440       Free (Arguments);
 441
 442       --  Move all the -l switches from Opts to Opts2
 443
 444       declare
 445          Index : Natural := Opts'First;
 446          Opt   : String_Access;
 447
 448       begin
 449          while Index <= Last_Opt loop
 450             Opt := Opts (Index);
 451
 452             if Opt'Length > 2 and then
 453               Opt (Opt'First .. Opt'First + 1) = "-l"
 454             then
 455                if Index < Last_Opt then
 456                   Opts (Index .. Last_Opt - 1) :=
 457                     Opts (Index + 1 .. Last_Opt);
 458                end if;
 459
 460                Last_Opt := Last_Opt - 1;
 461
 462                Last_Opt2 := Last_Opt2 + 1;
 463                Opts2 (Last_Opt2) := Opt;
 464
 465             else
 466                Index := Index + 1;
 467             end if;
 468          end loop;
 469       end;
 470
 471       --  Invoke gcc to build the library
 472
 473       Utl.Gcc
 474         (Output_File => Lib_File,
 475          Objects     => Ofiles & Additional_Objects.all,
 476          Options     => VMS_Options,
 477          Options_2   => Shared_Libgcc_Switch &
 478                         Opts (Opts'First .. Last_Opt) &
 479                         Opts2 (Opts2'First .. Last_Opt2),
 480          Driver_Name => Driver_Name);
 481
 482       --  The auto-init object file need to be deleted, so that it will not
 483       --  be included in the library as a regular object file, otherwise
 484       --  it will be included twice when the library will be built next
 485       --  time, which may lead to errors.
 486
 487       if Auto_Init then
 488          declare
 489             Auto_Init_Object_File_Name : constant String :=
 490                                            Lib_Filename & "__init.obj";
 491             Disregard : Boolean;
 492
 493          begin
 494             if Verbose_Mode then
 495                Write_Str ("deleting auto-init object file """);
 496                Write_Str (Auto_Init_Object_File_Name);
 497                Write_Line ("""");
 498             end if;
 499
 500             Delete_File (Auto_Init_Object_File_Name, Success => Disregard);
 501          end;
 502       end if;
 503    end Build_Dynamic_Library;
 504
 505 --  Package initialization
 506
 507 begin
 508    Build_Dynamic_Library_Ptr    := Build_Dynamic_Library'Access;
 509 end MLib.Tgt.Specific;