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2010-07-27 Paolo Carlini <paolo.carlini@oracle.com>
[official-gcc/alias-decl.git] / gcc / ada / gnatlink.adb
blob675d9a364e4997476646737682e8ad8a139c1383
1 ------------------------------------------------------------------------------
2 -- --
3 -- GNAT COMPILER COMPONENTS --
4 -- --
5 -- G N A T L I N K --
6 -- --
7 -- B o d y --
8 -- --
9 -- Copyright (C) 1996-2009, Free Software Foundation, Inc. --
10 -- --
11 -- GNAT is free software; you can redistribute it and/or modify it under --
12 -- terms of the GNU General Public License as published by the Free Soft- --
13 -- ware Foundation; either version 3, or (at your option) any later ver- --
14 -- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
15 -- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
16 -- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License --
17 -- for more details. You should have received a copy of the GNU General --
18 -- Public License distributed with GNAT; see file COPYING3. If not, go to --
19 -- http://www.gnu.org/licenses for a complete copy of the license. --
20 -- --
21 -- GNAT was originally developed by the GNAT team at New York University. --
22 -- Extensive contributions were provided by Ada Core Technologies Inc. --
23 -- --
24 ------------------------------------------------------------------------------
25
26 -- Gnatlink usage: please consult the gnat documentation
27
28 with ALI; use ALI;
29 with Csets;
30 with Gnatvsn; use Gnatvsn;
31 with Hostparm;
32 with Indepsw; use Indepsw;
33 with Namet; use Namet;
34 with Opt;
35 with Osint; use Osint;
36 with Output; use Output;
37 with Snames;
38 with Switch; use Switch;
39 with System; use System;
40 with Table;
41 with Targparm; use Targparm;
42 with Types;
43
44 with Ada.Command_Line; use Ada.Command_Line;
45 with Ada.Exceptions; use Ada.Exceptions;
46
47 with System.OS_Lib; use System.OS_Lib;
48 with System.CRTL;
49
50 with Interfaces.C_Streams; use Interfaces.C_Streams;
51 with Interfaces.C.Strings; use Interfaces.C.Strings;
52
53 procedure Gnatlink is
54 pragma Ident (Gnatvsn.Gnat_Static_Version_String);
55
56 Shared_Libgcc_String : constant String := "-shared-libgcc";
57 Shared_Libgcc : constant String_Access :=
58 new String'(Shared_Libgcc_String);
59 -- Used to invoke gcc when the binder is invoked with -shared
60
61 Static_Libgcc_String : constant String := "-static-libgcc";
62 Static_Libgcc : constant String_Access :=
63 new String'(Static_Libgcc_String);
64 -- Used to invoke gcc when shared libs are not used
65
66 package Gcc_Linker_Options is new Table.Table (
67 Table_Component_Type => String_Access,
68 Table_Index_Type => Integer,
69 Table_Low_Bound => 1,
70 Table_Initial => 20,
71 Table_Increment => 100,
72 Table_Name => "Gnatlink.Gcc_Linker_Options");
73 -- Comments needed ???
74
75 package Libpath is new Table.Table (
76 Table_Component_Type => Character,
77 Table_Index_Type => Integer,
78 Table_Low_Bound => 1,
79 Table_Initial => 4096,
80 Table_Increment => 100,
81 Table_Name => "Gnatlink.Libpath");
82 -- Comments needed ???
83
84 package Linker_Options is new Table.Table (
85 Table_Component_Type => String_Access,
86 Table_Index_Type => Integer,
87 Table_Low_Bound => 1,
88 Table_Initial => 20,
89 Table_Increment => 100,
90 Table_Name => "Gnatlink.Linker_Options");
91 -- Comments needed ???
92
93 package Linker_Objects is new Table.Table (
94 Table_Component_Type => String_Access,
95 Table_Index_Type => Integer,
96 Table_Low_Bound => 1,
97 Table_Initial => 20,
98 Table_Increment => 100,
99 Table_Name => "Gnatlink.Linker_Objects");
100 -- This table collects the objects file to be passed to the linker. In the
101 -- case where the linker command line is too long then programs objects
102 -- are put on the Response_File_Objects table. Note that the binder object
103 -- file and the user's objects remain in this table. This is very
104 -- important because on the GNU linker command line the -L switch is not
105 -- used to look for objects files but -L switch is used to look for
106 -- objects listed in the response file. This is not a problem with the
107 -- applications objects as they are specified with a full name.
108
109 package Response_File_Objects is new Table.Table (
110 Table_Component_Type => String_Access,
111 Table_Index_Type => Integer,
112 Table_Low_Bound => 1,
113 Table_Initial => 20,
114 Table_Increment => 100,
115 Table_Name => "Gnatlink.Response_File_Objects");
116 -- This table collects the objects file that are to be put in the response
117 -- file. Only application objects are collected there (see details in
118 -- Linker_Objects table comments)
119
120 package Binder_Options_From_ALI is new Table.Table (
121 Table_Component_Type => String_Access,
122 Table_Index_Type => Integer,
123 Table_Low_Bound => 1, -- equals low bound of Argument_List for Spawn
124 Table_Initial => 20,
125 Table_Increment => 100,
126 Table_Name => "Gnatlink.Binder_Options_From_ALI");
127 -- This table collects the switches from the ALI file of the main
128 -- subprogram.
129
130 package Binder_Options is new Table.Table (
131 Table_Component_Type => String_Access,
132 Table_Index_Type => Integer,
133 Table_Low_Bound => 1, -- equals low bound of Argument_List for Spawn
134 Table_Initial => 20,
135 Table_Increment => 100,
136 Table_Name => "Gnatlink.Binder_Options");
137 -- This table collects the arguments to be passed to compile the binder
138 -- generated file.
139
140 Gcc : String_Access := Program_Name ("gcc", "gnatlink");
141
142 Read_Mode : constant String := "r" & ASCII.NUL;
143
144 Begin_Info : String := "-- BEGIN Object file/option list";
145 End_Info : String := "-- END Object file/option list ";
146 -- Note: above lines are modified in C mode, see option processing
147
148 Gcc_Path : String_Access;
149 Linker_Path : String_Access;
150 Output_File_Name : String_Access;
151 Ali_File_Name : String_Access;
152 Binder_Spec_Src_File : String_Access;
153 Binder_Body_Src_File : String_Access;
154 Binder_Ali_File : String_Access;
155 Binder_Obj_File : String_Access;
156
157 Tname : Temp_File_Name;
158 Tname_FD : File_Descriptor := Invalid_FD;
159 -- Temporary file used by linker to pass list of object files on
160 -- certain systems with limitations on size of arguments.
161
162 Lname : String_Access := null;
163 -- File used by linker for CLI target, used to concatenate all .il files
164 -- when the command line passed to ilasm is too long
165
166 Debug_Flag_Present : Boolean := False;
167 Verbose_Mode : Boolean := False;
168 Very_Verbose_Mode : Boolean := False;
169
170 Ada_Bind_File : Boolean := True;
171 -- Set to True if bind file is generated in Ada
172
173 Standard_Gcc : Boolean := True;
174
175 Compile_Bind_File : Boolean := True;
176 -- Set to False if bind file is not to be compiled
177
178 Create_Map_File : Boolean := False;
179 -- Set to True by switch -M. The map file name is derived from
180 -- the ALI file name (mainprog.ali => mainprog.map).
181
182 Object_List_File_Supported : Boolean;
183 for Object_List_File_Supported'Size use Character'Size;
184 pragma Import
185 (C, Object_List_File_Supported, "__gnat_objlist_file_supported");
186 -- Predicate indicating whether the linker has an option whereby the
187 -- names of object files can be passed to the linker in a file.
188
189 Object_List_File_Required : Boolean := False;
190 -- Set to True to force generation of a response file
191
192 Shared_Libgcc_Default : Character;
193 for Shared_Libgcc_Default'Size use Character'Size;
194 pragma Import
195 (C, Shared_Libgcc_Default, "__gnat_shared_libgcc_default");
196 -- Indicates wether libgcc should be statically linked (use 'T') or
197 -- dynamically linked (use 'H') by default.
198
199 function Base_Name (File_Name : String) return String;
200 -- Return just the file name part without the extension (if present)
201
202 procedure Delete (Name : String);
203 -- Wrapper to unlink as status is ignored by this application
204
205 procedure Error_Msg (Message : String);
206 -- Output the error or warning Message
207
208 procedure Exit_With_Error (Error : String);
209 -- Output Error and exit program with a fatal condition
210
211 procedure Process_Args;
212 -- Go through all the arguments and build option tables
213
214 procedure Process_Binder_File (Name : String);
215 -- Reads the binder file and extracts linker arguments
216
217 procedure Usage;
218 -- Display usage
219
220 procedure Write_Header;
221 -- Show user the program name, version and copyright
222
223 procedure Write_Usage;
224 -- Show user the program options
225
226 ---------------
227 -- Base_Name --
228 ---------------
229
230 function Base_Name (File_Name : String) return String is
231 Findex1 : Natural;
232 Findex2 : Natural;
233
234 begin
235 Findex1 := File_Name'First;
236
237 -- The file might be specified by a full path name. However,
238 -- we want the path to be stripped away.
239
240 for J in reverse File_Name'Range loop
241 if Is_Directory_Separator (File_Name (J)) then
242 Findex1 := J + 1;
243 exit;
244 end if;
245 end loop;
246
247 Findex2 := File_Name'Last;
248 while Findex2 > Findex1
249 and then File_Name (Findex2) /= '.'
250 loop
251 Findex2 := Findex2 - 1;
252 end loop;
253
254 if Findex2 = Findex1 then
255 Findex2 := File_Name'Last + 1;
256 end if;
257
258 return File_Name (Findex1 .. Findex2 - 1);
259 end Base_Name;
260
261 ------------
262 -- Delete --
263 ------------
264
265 procedure Delete (Name : String) is
266 Status : int;
267 pragma Unreferenced (Status);
268 begin
269 Status := unlink (Name'Address);
270 -- Is it really right to ignore an error here ???
271 end Delete;
272
273 ---------------
274 -- Error_Msg --
275 ---------------
276
277 procedure Error_Msg (Message : String) is
278 begin
279 Write_Str (Base_Name (Command_Name));
280 Write_Str (": ");
281 Write_Str (Message);
282 Write_Eol;
283 end Error_Msg;
284
285 ---------------------
286 -- Exit_With_Error --
287 ---------------------
288
289 procedure Exit_With_Error (Error : String) is
290 begin
291 Error_Msg (Error);
292 Exit_Program (E_Fatal);
293 end Exit_With_Error;
294
295 ------------------
296 -- Process_Args --
297 ------------------
298
299 procedure Process_Args is
300 Next_Arg : Integer;
301 Skip_Next : Boolean := False;
302 -- Set to true if the next argument is to be added into the list of
303 -- linker's argument without parsing it.
304
305 procedure Check_Version_And_Help is new Check_Version_And_Help_G (Usage);
306
307 -- Start of processing for Process_Args
308
309 begin
310 -- First, check for --version and --help
311
312 Check_Version_And_Help ("GNATLINK", "1995");
313
314 -- Loop through arguments of gnatlink command
315
316 Next_Arg := 1;
317 loop
318 exit when Next_Arg > Argument_Count;
319
320 Process_One_Arg : declare
321 Arg : constant String := Argument (Next_Arg);
322
323 begin
324 -- Case of argument which is a switch
325
326 -- We definitely need section by section comments here ???
327
328 if Skip_Next then
329
330 -- This argument must not be parsed, just add it to the
331 -- list of linker's options.
332
333 Skip_Next := False;
334
335 Linker_Options.Increment_Last;
336 Linker_Options.Table (Linker_Options.Last) :=
337 new String'(Arg);
338
339 elsif Arg'Length /= 0 and then Arg (1) = '-' then
340 if Arg'Length > 4 and then Arg (2 .. 5) = "gnat" then
341 Exit_With_Error
342 ("invalid switch: """ & Arg & """ (gnat not needed here)");
343 end if;
344
345 if Arg = "-Xlinker" then
346
347 -- Next argument should be sent directly to the linker.
348 -- We do not want to parse it here.
349
350 Skip_Next := True;
351
352 Linker_Options.Increment_Last;
353 Linker_Options.Table (Linker_Options.Last) :=
354 new String'(Arg);
355
356 elsif Arg (2) = 'g'
357 and then (Arg'Length < 5 or else Arg (2 .. 5) /= "gnat")
358 then
359 Debug_Flag_Present := True;
360
361 Linker_Options.Increment_Last;
362 Linker_Options.Table (Linker_Options.Last) :=
363 new String'(Arg);
364
365 Binder_Options.Increment_Last;
366 Binder_Options.Table (Binder_Options.Last) :=
367 Linker_Options.Table (Linker_Options.Last);
368
369 elsif Arg'Length >= 3 and then Arg (2) = 'M' then
370 declare
371 Switches : String_List_Access;
372
373 begin
374 Convert (Map_File, Arg (3 .. Arg'Last), Switches);
375
376 if Switches /= null then
377 for J in Switches'Range loop
378 Linker_Options.Increment_Last;
379 Linker_Options.Table (Linker_Options.Last) :=
380 Switches (J);
381 end loop;
382 end if;
383 end;
384
385 elsif Arg'Length = 2 then
386 case Arg (2) is
387 when 'A' =>
388 Ada_Bind_File := True;
389 Begin_Info := "-- BEGIN Object file/option list";
390 End_Info := "-- END Object file/option list ";
391
392 when 'b' =>
393 Linker_Options.Increment_Last;
394 Linker_Options.Table (Linker_Options.Last) :=
395 new String'(Arg);
396
397 Binder_Options.Increment_Last;
398 Binder_Options.Table (Binder_Options.Last) :=
399 Linker_Options.Table (Linker_Options.Last);
400
401 Next_Arg := Next_Arg + 1;
402
403 if Next_Arg > Argument_Count then
404 Exit_With_Error ("Missing argument for -b");
405 end if;
406
407 Get_Machine_Name : declare
408 Name_Arg : constant String_Access :=
409 new String'(Argument (Next_Arg));
410
411 begin
412 Linker_Options.Increment_Last;
413 Linker_Options.Table (Linker_Options.Last) :=
414 Name_Arg;
415
416 Binder_Options.Increment_Last;
417 Binder_Options.Table (Binder_Options.Last) :=
418 Name_Arg;
419
420 end Get_Machine_Name;
421
422 when 'C' =>
423 Ada_Bind_File := False;
424 Begin_Info := "/* BEGIN Object file/option list";
425 End_Info := " END Object file/option list */";
426
427 when 'f' =>
428 if Object_List_File_Supported then
429 Object_List_File_Required := True;
430 else
431 Exit_With_Error
432 ("Object list file not supported on this target");
433 end if;
434
435 when 'M' =>
436 Create_Map_File := True;
437
438 when 'n' =>
439 Compile_Bind_File := False;
440
441 when 'o' =>
442 Next_Arg := Next_Arg + 1;
443
444 if Next_Arg > Argument_Count then
445 Exit_With_Error ("Missing argument for -o");
446 end if;
447
448 Output_File_Name :=
449 new String'(Executable_Name
450 (Argument (Next_Arg),
451 Only_If_No_Suffix => True));
452
453 when 'R' =>
454 Opt.Run_Path_Option := False;
455
456 when 'v' =>
457
458 -- Support "double" verbose mode. Second -v
459 -- gets sent to the linker and binder phases.
460
461 if Verbose_Mode then
462 Very_Verbose_Mode := True;
463
464 Linker_Options.Increment_Last;
465 Linker_Options.Table (Linker_Options.Last) :=
466 new String'(Arg);
467
468 Binder_Options.Increment_Last;
469 Binder_Options.Table (Binder_Options.Last) :=
470 Linker_Options.Table (Linker_Options.Last);
471
472 else
473 Verbose_Mode := True;
474
475 end if;
476
477 when others =>
478 Linker_Options.Increment_Last;
479 Linker_Options.Table (Linker_Options.Last) :=
480 new String'(Arg);
481
482 end case;
483
484 elsif Arg (2) = 'B' then
485 Linker_Options.Increment_Last;
486 Linker_Options.Table (Linker_Options.Last) :=
487 new String'(Arg);
488
489 Binder_Options.Increment_Last;
490 Binder_Options.Table (Binder_Options.Last) :=
491 Linker_Options.Table (Linker_Options.Last);
492
493 elsif Arg'Length >= 7 and then Arg (1 .. 7) = "--LINK=" then
494 if Arg'Length = 7 then
495 Exit_With_Error ("Missing argument for --LINK=");
496 end if;
497
498 Linker_Path :=
499 System.OS_Lib.Locate_Exec_On_Path (Arg (8 .. Arg'Last));
500
501 if Linker_Path = null then
502 Exit_With_Error
503 ("Could not locate linker: " & Arg (8 .. Arg'Last));
504 end if;
505
506 elsif Arg'Length > 6 and then Arg (1 .. 6) = "--GCC=" then
507 declare
508 Program_Args : constant Argument_List_Access :=
509 Argument_String_To_List
510 (Arg (7 .. Arg'Last));
511
512 begin
513 if Program_Args.all (1).all /= Gcc.all then
514 Gcc := new String'(Program_Args.all (1).all);
515 Standard_Gcc := False;
516 end if;
517
518 -- Set appropriate flags for switches passed
519
520 for J in 2 .. Program_Args.all'Last loop
521 declare
522 Arg : constant String := Program_Args.all (J).all;
523 AF : constant Integer := Arg'First;
524
525 begin
526 if Arg'Length /= 0 and then Arg (AF) = '-' then
527 if Arg (AF + 1) = 'g'
528 and then (Arg'Length = 2
529 or else Arg (AF + 2) in '0' .. '3'
530 or else Arg (AF + 2 .. Arg'Last) = "coff")
531 then
532 Debug_Flag_Present := True;
533 end if;
534 end if;
535
536 -- Add directory to source search dirs so that
537 -- Get_Target_Parameters can find system.ads
538
539 if Arg (AF .. AF + 1) = "-I"
540 and then Arg'Length > 2
541 then
542 Add_Src_Search_Dir (Arg (AF + 2 .. Arg'Last));
543 end if;
544
545 -- Pass to gcc for compiling binder generated file
546 -- No use passing libraries, it will just generate
547 -- a warning
548
549 if not (Arg (AF .. AF + 1) = "-l"
550 or else Arg (AF .. AF + 1) = "-L")
551 then
552 Binder_Options.Increment_Last;
553 Binder_Options.Table (Binder_Options.Last) :=
554 new String'(Arg);
555 end if;
556
557 -- Pass to gcc for linking program
558
559 Gcc_Linker_Options.Increment_Last;
560 Gcc_Linker_Options.Table
561 (Gcc_Linker_Options.Last) := new String'(Arg);
562 end;
563 end loop;
564 end;
565
566 -- Send all multi-character switches not recognized as
567 -- a special case by gnatlink to the linker/loader stage.
568
569 else
570 Linker_Options.Increment_Last;
571 Linker_Options.Table (Linker_Options.Last) :=
572 new String'(Arg);
573 end if;
574
575 -- Here if argument is a file name rather than a switch
576
577 else
578 -- If explicit ali file, capture it
579
580 if Arg'Length > 4
581 and then Arg (Arg'Last - 3 .. Arg'Last) = ".ali"
582 then
583 if Ali_File_Name = null then
584 Ali_File_Name := new String'(Arg);
585 else
586 Exit_With_Error ("cannot handle more than one ALI file");
587 end if;
588
589 -- If target object file, record object file
590
591 elsif Arg'Length > Get_Target_Object_Suffix.all'Length
592 and then Arg
593 (Arg'Last -
594 Get_Target_Object_Suffix.all'Length + 1 .. Arg'Last)
595 = Get_Target_Object_Suffix.all
596 then
597 Linker_Objects.Increment_Last;
598 Linker_Objects.Table (Linker_Objects.Last) :=
599 new String'(Arg);
600
601 -- If host object file, record object file
602 -- e.g. accept foo.o as well as foo.obj on VMS target
603
604 elsif Arg'Length > Get_Object_Suffix.all'Length
605 and then Arg
606 (Arg'Last - Get_Object_Suffix.all'Length + 1 .. Arg'Last)
607 = Get_Object_Suffix.all
608 then
609 Linker_Objects.Increment_Last;
610 Linker_Objects.Table (Linker_Objects.Last) :=
611 new String'(Arg);
612
613 -- If corresponding ali file exists, capture it
614
615 elsif Ali_File_Name = null
616 and then Is_Regular_File (Arg & ".ali")
617 then
618 Ali_File_Name := new String'(Arg & ".ali");
619
620 -- Otherwise assume this is a linker options entry, but
621 -- see below for interesting adjustment to this assumption.
622
623 else
624 Linker_Options.Increment_Last;
625 Linker_Options.Table (Linker_Options.Last) :=
626 new String'(Arg);
627 end if;
628 end if;
629 end Process_One_Arg;
630
631 Next_Arg := Next_Arg + 1;
632 end loop;
633
634 -- If Ada bind file, then compile it with warnings suppressed, because
635 -- otherwise the with of the main program may cause junk warnings.
636
637 if Ada_Bind_File then
638 Binder_Options.Increment_Last;
639 Binder_Options.Table (Binder_Options.Last) := new String'("-gnatws");
640 end if;
641
642 -- If we did not get an ali file at all, and we had at least one
643 -- linker option, then assume that was the intended ali file after
644 -- all, so that we get a nicer message later on.
645
646 if Ali_File_Name = null
647 and then Linker_Options.Last >= Linker_Options.First
648 then
649 Ali_File_Name :=
650 new String'(Linker_Options.Table (Linker_Options.First).all &
651 ".ali");
652 end if;
653 end Process_Args;
654
655 -------------------------
656 -- Process_Binder_File --
657 -------------------------
658
659 procedure Process_Binder_File (Name : String) is
660 Fd : FILEs;
661 -- Binder file's descriptor
662
663 Link_Bytes : Integer := 0;
664 -- Projected number of bytes for the linker command line
665
666 Link_Max : Integer;
667 pragma Import (C, Link_Max, "__gnat_link_max");
668 -- Maximum number of bytes on the command line supported by the OS
669 -- linker. Passed this limit the response file mechanism must be used
670 -- if supported.
671
672 Next_Line : String (1 .. 1000);
673 -- Current line value
674
675 Nlast : Integer;
676 Nfirst : Integer;
677 -- Current line slice (the slice does not contain line terminator)
678
679 Last : Integer;
680 -- Current line last character for shared libraries (without version)
681
682 Objs_Begin : Integer := 0;
683 -- First object file index in Linker_Objects table
684
685 Objs_End : Integer := 0;
686 -- Last object file index in Linker_Objects table
687
688 Status : int;
689 pragma Warnings (Off, Status);
690 -- Used for various Interfaces.C_Streams calls
691
692 Closing_Status : Boolean;
693 pragma Warnings (Off, Closing_Status);
694 -- For call to Close
695
696 GNAT_Static : Boolean := False;
697 -- Save state of -static option
698
699 GNAT_Shared : Boolean := False;
700 -- Save state of -shared option
701
702 Xlinker_Was_Previous : Boolean := False;
703 -- Indicate that "-Xlinker" was the option preceding the current
704 -- option. If True, then the current option is never suppressed.
705
706 -- Rollback data
707
708 -- These data items are used to store current binder file context.
709 -- The context is composed of the file descriptor position and the
710 -- current line together with the slice indexes (first and last
711 -- position) for this line. The rollback data are used by the
712 -- Store_File_Context and Rollback_File_Context routines below.
713 -- The file context mechanism interact only with the Get_Next_Line
714 -- call. For example:
715
716 -- Store_File_Context;
717 -- Get_Next_Line;
718 -- Rollback_File_Context;
719 -- Get_Next_Line;
720
721 -- Both Get_Next_Line calls above will read the exact same data from
722 -- the file. In other words, Next_Line, Nfirst and Nlast variables
723 -- will be set with the exact same values.
724
725 RB_File_Pos : long; -- File position
726 RB_Next_Line : String (1 .. 1000); -- Current line content
727 RB_Nlast : Integer; -- Slice last index
728 RB_Nfirst : Integer; -- Slice first index
729
730 Run_Path_Option_Ptr : Interfaces.C.Strings.chars_ptr;
731 pragma Import (C, Run_Path_Option_Ptr, "__gnat_run_path_option");
732 -- Pointer to string representing the native linker option which
733 -- specifies the path where the dynamic loader should find shared
734 -- libraries. Equal to null string if this system doesn't support it.
735
736 Libgcc_Subdir_Ptr : Interfaces.C.Strings.chars_ptr;
737 pragma Import (C, Libgcc_Subdir_Ptr, "__gnat_default_libgcc_subdir");
738 -- Pointer to string indicating the installation subdirectory where
739 -- a default shared libgcc might be found.
740
741 Object_Library_Ext_Ptr : Interfaces.C.Strings.chars_ptr;
742 pragma Import
743 (C, Object_Library_Ext_Ptr, "__gnat_object_library_extension");
744 -- Pointer to string specifying the default extension for
745 -- object libraries, e.g. Unix uses ".a", VMS uses ".olb".
746
747 Object_File_Option_Ptr : Interfaces.C.Strings.chars_ptr;
748 pragma Import (C, Object_File_Option_Ptr, "__gnat_object_file_option");
749 -- Pointer to a string representing the linker option which specifies
750 -- the response file.
751
752 Using_GNU_Linker : Boolean;
753 for Using_GNU_Linker'Size use Character'Size;
754 pragma Import (C, Using_GNU_Linker, "__gnat_using_gnu_linker");
755 -- Predicate indicating whether this target uses the GNU linker. In
756 -- this case we must output a GNU linker compatible response file.
757
758 Separate_Run_Path_Options : Boolean;
759 for Separate_Run_Path_Options'Size use Character'Size;
760 pragma Import
761 (C, Separate_Run_Path_Options, "__gnat_separate_run_path_options");
762 -- Whether separate rpath options should be emitted for each directory
763
764 Opening : aliased constant String := """";
765 Closing : aliased constant String := '"' & ASCII.LF;
766 -- Needed to quote object paths in object list files when GNU linker
767 -- is used.
768
769 procedure Get_Next_Line;
770 -- Read the next line from the binder file without the line
771 -- terminator.
772
773 function Index (S, Pattern : String) return Natural;
774 -- Return the last occurrence of Pattern in S, or 0 if none
775
776 function Is_Option_Present (Opt : String) return Boolean;
777 -- Return true if the option Opt is already present in
778 -- Linker_Options table.
779
780 procedure Store_File_Context;
781 -- Store current file context, Fd position and current line data.
782 -- The file context is stored into the rollback data above (RB_*).
783 -- Store_File_Context can be called at any time, only the last call
784 -- will be used (i.e. this routine overwrites the file context).
785
786 procedure Rollback_File_Context;
787 -- Restore file context from rollback data. This routine must be called
788 -- after Store_File_Context. The binder file context will be restored
789 -- with the data stored by the last Store_File_Context call.
790
791 -------------------
792 -- Get_Next_Line --
793 -------------------
794
795 procedure Get_Next_Line is
796 Fchars : chars;
797
798 begin
799 Fchars := fgets (Next_Line'Address, Next_Line'Length, Fd);
800
801 if Fchars = System.Null_Address then
802 Exit_With_Error ("Error reading binder output");
803 end if;
804
805 Nfirst := Next_Line'First;
806 Nlast := Nfirst;
807 while Nlast <= Next_Line'Last
808 and then Next_Line (Nlast) /= ASCII.LF
809 and then Next_Line (Nlast) /= ASCII.CR
810 loop
811 Nlast := Nlast + 1;
812 end loop;
813
814 Nlast := Nlast - 1;
815 end Get_Next_Line;
816
817 -----------
818 -- Index --
819 -----------
820
821 function Index (S, Pattern : String) return Natural is
822 Len : constant Natural := Pattern'Length;
823
824 begin
825 for J in reverse S'First .. S'Last - Len + 1 loop
826 if Pattern = S (J .. J + Len - 1) then
827 return J;
828 end if;
829 end loop;
830
831 return 0;
832 end Index;
833
834 -----------------------
835 -- Is_Option_Present --
836 -----------------------
837
838 function Is_Option_Present (Opt : String) return Boolean is
839 begin
840 for I in 1 .. Linker_Options.Last loop
841
842 if Linker_Options.Table (I).all = Opt then
843 return True;
844 end if;
845
846 end loop;
847
848 return False;
849 end Is_Option_Present;
850
851 ---------------------------
852 -- Rollback_File_Context --
853 ---------------------------
854
855 procedure Rollback_File_Context is
856 begin
857 Next_Line := RB_Next_Line;
858 Nfirst := RB_Nfirst;
859 Nlast := RB_Nlast;
860 Status := fseek (Fd, RB_File_Pos, Interfaces.C_Streams.SEEK_SET);
861
862 if Status = -1 then
863 Exit_With_Error ("Error setting file position");
864 end if;
865 end Rollback_File_Context;
866
867 ------------------------
868 -- Store_File_Context --
869 ------------------------
870
871 procedure Store_File_Context is
872 use type System.CRTL.long;
873 begin
874 RB_Next_Line := Next_Line;
875 RB_Nfirst := Nfirst;
876 RB_Nlast := Nlast;
877 RB_File_Pos := ftell (Fd);
878
879 if RB_File_Pos = -1 then
880 Exit_With_Error ("Error getting file position");
881 end if;
882 end Store_File_Context;
883
884 -- Start of processing for Process_Binder_File
885
886 begin
887 Fd := fopen (Name'Address, Read_Mode'Address);
888
889 if Fd = NULL_Stream then
890 Exit_With_Error ("Failed to open binder output");
891 end if;
892
893 -- Skip up to the Begin Info line
894
895 loop
896 Get_Next_Line;
897 exit when Next_Line (Nfirst .. Nlast) = Begin_Info;
898 end loop;
899
900 loop
901 Get_Next_Line;
902
903 -- Go to end when end line is reached (this will happen in
904 -- High_Integrity_Mode where no -L switches are generated)
905
906 exit when Next_Line (Nfirst .. Nlast) = End_Info;
907
908 if Ada_Bind_File then
909 Next_Line (Nfirst .. Nlast - 8) :=
910 Next_Line (Nfirst + 8 .. Nlast);
911 Nlast := Nlast - 8;
912 end if;
913
914 -- Go to next section when switches are reached
915
916 exit when Next_Line (1) = '-';
917
918 -- Otherwise we have another object file to collect
919
920 Linker_Objects.Increment_Last;
921
922 -- Mark the positions of first and last object files in case
923 -- they need to be placed with a named file on systems having
924 -- linker line limitations.
925
926 if Objs_Begin = 0 then
927 Objs_Begin := Linker_Objects.Last;
928 end if;
929
930 Linker_Objects.Table (Linker_Objects.Last) :=
931 new String'(Next_Line (Nfirst .. Nlast));
932
933 Link_Bytes := Link_Bytes + Nlast - Nfirst + 2;
934 -- Nlast - Nfirst + 1, for the size, plus one for the space between
935 -- each arguments.
936 end loop;
937
938 Objs_End := Linker_Objects.Last;
939
940 -- Continue to compute the Link_Bytes, the linker options are part of
941 -- command line length.
942
943 Store_File_Context;
944
945 while Next_Line (Nfirst .. Nlast) /= End_Info loop
946 Link_Bytes := Link_Bytes + Nlast - Nfirst + 2;
947 Get_Next_Line;
948 end loop;
949
950 Rollback_File_Context;
951
952 -- On systems that have limitations on handling very long linker lines
953 -- we make use of the system linker option which takes a list of object
954 -- file names from a file instead of the command line itself. What we do
955 -- is to replace the list of object files by the special linker option
956 -- which then reads the object file list from a file instead. The option
957 -- to read from a file instead of the command line is only triggered if
958 -- a conservative threshold is passed.
959
960 if VM_Target = CLI_Target
961 and then Link_Bytes > Link_Max
962 then
963 Lname := new String'("l~" & Base_Name (Ali_File_Name.all) & ".il");
964
965 for J in Objs_Begin .. Objs_End loop
966 Copy_File (Linker_Objects.Table (J).all, Lname.all,
967 Success => Closing_Status,
968 Mode => Append);
969 end loop;
970
971 -- Add the special objects list file option together with the name
972 -- of the temporary file to the objects file table.
973
974 Linker_Objects.Table (Objs_Begin) :=
975 new String'(Value (Object_File_Option_Ptr) & Lname.all);
976
977 -- The slots containing these object file names are then removed
978 -- from the objects table so they do not appear in the link. They
979 -- are removed by moving up the linker options and non-Ada object
980 -- files appearing after the Ada object list in the table.
981
982 declare
983 N : Integer;
984
985 begin
986 N := Objs_End - Objs_Begin + 1;
987
988 for J in Objs_End + 1 .. Linker_Objects.Last loop
989 Linker_Objects.Table (J - N + 1) := Linker_Objects.Table (J);
990 end loop;
991
992 Linker_Objects.Set_Last (Linker_Objects.Last - N + 1);
993 end;
994
995 elsif Object_List_File_Required
996 or else (Object_List_File_Supported
997 and then Link_Bytes > Link_Max)
998 then
999 -- Create a temporary file containing the Ada user object files
1000 -- needed by the link. This list is taken from the bind file
1001 -- and is output one object per line for maximal compatibility with
1002 -- linkers supporting this option.
1003
1004 Create_Temp_File (Tname_FD, Tname);
1005
1006 -- ??? File descriptor should be checked to not be Invalid_FD.
1007 -- ??? Status of Write and Close operations should be checked, and
1008 -- failure should occur if a status is wrong.
1009
1010 -- If target is using the GNU linker we must add a special header
1011 -- and footer in the response file.
1012
1013 -- The syntax is : INPUT (object1.o object2.o ... )
1014
1015 -- Because the GNU linker does not like name with characters such
1016 -- as '!', we must put the object paths between double quotes.
1017
1018 if Using_GNU_Linker then
1019 declare
1020 GNU_Header : aliased constant String := "INPUT (";
1021
1022 begin
1023 Status := Write (Tname_FD, GNU_Header'Address,
1024 GNU_Header'Length);
1025 end;
1026 end if;
1027
1028 for J in Objs_Begin .. Objs_End loop
1029
1030 -- Opening quote for GNU linker
1031
1032 if Using_GNU_Linker then
1033 Status := Write (Tname_FD, Opening'Address, 1);
1034 end if;
1035
1036 Status := Write (Tname_FD, Linker_Objects.Table (J).all'Address,
1037 Linker_Objects.Table (J).all'Length);
1038
1039 -- Closing quote for GNU linker
1040
1041 if Using_GNU_Linker then
1042 Status := Write (Tname_FD, Closing'Address, 2);
1043
1044 else
1045 Status := Write (Tname_FD, ASCII.LF'Address, 1);
1046 end if;
1047
1048 Response_File_Objects.Increment_Last;
1049 Response_File_Objects.Table (Response_File_Objects.Last) :=
1050 Linker_Objects.Table (J);
1051 end loop;
1052
1053 -- Handle GNU linker response file footer
1054
1055 if Using_GNU_Linker then
1056 declare
1057 GNU_Footer : aliased constant String := ")";
1058
1059 begin
1060 Status := Write (Tname_FD, GNU_Footer'Address,
1061 GNU_Footer'Length);
1062 end;
1063 end if;
1064
1065 Close (Tname_FD, Closing_Status);
1066
1067 -- Add the special objects list file option together with the name
1068 -- of the temporary file (removing the null character) to the objects
1069 -- file table.
1070
1071 Linker_Objects.Table (Objs_Begin) :=
1072 new String'(Value (Object_File_Option_Ptr) &
1073 Tname (Tname'First .. Tname'Last - 1));
1074
1075 -- The slots containing these object file names are then removed
1076 -- from the objects table so they do not appear in the link. They
1077 -- are removed by moving up the linker options and non-Ada object
1078 -- files appearing after the Ada object list in the table.
1079
1080 declare
1081 N : Integer;
1082
1083 begin
1084 N := Objs_End - Objs_Begin + 1;
1085
1086 for J in Objs_End + 1 .. Linker_Objects.Last loop
1087 Linker_Objects.Table (J - N + 1) := Linker_Objects.Table (J);
1088 end loop;
1089
1090 Linker_Objects.Set_Last (Linker_Objects.Last - N + 1);
1091 end;
1092 end if;
1093
1094 -- Process switches and options
1095
1096 if Next_Line (Nfirst .. Nlast) /= End_Info then
1097 Xlinker_Was_Previous := False;
1098
1099 loop
1100 if Xlinker_Was_Previous
1101 or else Next_Line (Nfirst .. Nlast) = "-Xlinker"
1102 then
1103 Linker_Options.Increment_Last;
1104 Linker_Options.Table (Linker_Options.Last) :=
1105 new String'(Next_Line (Nfirst .. Nlast));
1106
1107 elsif Next_Line (Nfirst .. Nlast) = "-static" then
1108 GNAT_Static := True;
1109
1110 elsif Next_Line (Nfirst .. Nlast) = "-shared" then
1111 GNAT_Shared := True;
1112
1113 -- Add binder options only if not already set on the command
1114 -- line. This rule is a way to control the linker options order.
1115
1116 -- The following test needs comments, why is it VMS specific.
1117 -- The above comment looks out of date ???
1118
1119 elsif not (OpenVMS_On_Target
1120 and then
1121 Is_Option_Present (Next_Line (Nfirst .. Nlast)))
1122 then
1123 if Nlast > Nfirst + 2 and then
1124 Next_Line (Nfirst .. Nfirst + 1) = "-L"
1125 then
1126 -- Construct a library search path for use later
1127 -- to locate static gnatlib libraries.
1128
1129 if Libpath.Last > 1 then
1130 Libpath.Increment_Last;
1131 Libpath.Table (Libpath.Last) := Path_Separator;
1132 end if;
1133
1134 for I in Nfirst + 2 .. Nlast loop
1135 Libpath.Increment_Last;
1136 Libpath.Table (Libpath.Last) := Next_Line (I);
1137 end loop;
1138
1139 Linker_Options.Increment_Last;
1140
1141 Linker_Options.Table (Linker_Options.Last) :=
1142 new String'(Next_Line (Nfirst .. Nlast));
1143
1144 elsif Next_Line (Nfirst .. Nlast) = "-ldecgnat"
1145 or else Next_Line (Nfirst .. Nlast) = "-lgnarl"
1146 or else Next_Line (Nfirst .. Nlast) = "-lgnat"
1147 or else Next_Line
1148 (1 .. Natural'Min (Nlast, 8 + Library_Version'Length)) =
1149 Shared_Lib ("gnarl")
1150 or else Next_Line
1151 (1 .. Natural'Min (Nlast, 7 + Library_Version'Length)) =
1152 Shared_Lib ("gnat")
1153 then
1154 -- If it is a shared library, remove the library version.
1155 -- We will be looking for the static version of the library
1156 -- as it is in the same directory as the shared version.
1157
1158 if Next_Line (Nlast - Library_Version'Length + 1 .. Nlast)
1159 = Library_Version
1160 then
1161 -- Set Last to point to last character before the
1162 -- library version.
1163
1164 Last := Nlast - Library_Version'Length - 1;
1165 else
1166 Last := Nlast;
1167 end if;
1168
1169 -- Given a Gnat standard library, search the library path to
1170 -- find the library location.
1171
1172 -- Shouldn't we abstract a proc here, we are getting awfully
1173 -- heavily nested ???
1174
1175 declare
1176 File_Path : String_Access;
1177
1178 Object_Lib_Extension : constant String :=
1179 Value (Object_Library_Ext_Ptr);
1180
1181 File_Name : constant String := "lib" &
1182 Next_Line (Nfirst + 2 .. Last) &
1183 Object_Lib_Extension;
1184
1185 Run_Path_Opt : constant String :=
1186 Value (Run_Path_Option_Ptr);
1187
1188 GCC_Index : Natural;
1189 Run_Path_Opt_Index : Natural := 0;
1190
1191 begin
1192 File_Path :=
1193 Locate_Regular_File (File_Name,
1194 String (Libpath.Table (1 .. Libpath.Last)));
1195
1196 if File_Path /= null then
1197 if GNAT_Static then
1198
1199 -- If static gnatlib found, explicitly
1200 -- specify to overcome possible linker
1201 -- default usage of shared version.
1202
1203 Linker_Options.Increment_Last;
1204
1205 Linker_Options.Table (Linker_Options.Last) :=
1206 new String'(File_Path.all);
1207
1208 elsif GNAT_Shared then
1209 if Opt.Run_Path_Option then
1210
1211 -- If shared gnatlib desired, add the
1212 -- appropriate system specific switch
1213 -- so that it can be located at runtime.
1214
1215 if Run_Path_Opt'Length /= 0 then
1216
1217 -- Output the system specific linker command
1218 -- that allows the image activator to find
1219 -- the shared library at runtime. Also add
1220 -- path to find libgcc_s.so, if relevant.
1221
1222 declare
1223 Path : String (1 .. File_Path'Length + 15);
1224 Path_Last : constant Natural :=
1225 File_Path'Length;
1226
1227 begin
1228 Path (1 .. File_Path'Length) :=
1229 File_Path.all;
1230
1231 -- To find the location of the shared version
1232 -- of libgcc, we look for "gcc-lib" in the
1233 -- path of the library. However, this
1234 -- subdirectory is no longer present in
1235 -- recent versions of GCC. So, we look for
1236 -- the last subdirectory "lib" in the path.
1237
1238 GCC_Index :=
1239 Index (Path (1 .. Path_Last), "gcc-lib");
1240
1241 if GCC_Index /= 0 then
1242
1243 -- The shared version of libgcc is
1244 -- located in the parent directory.
1245
1246 GCC_Index := GCC_Index - 1;
1247
1248 else
1249 GCC_Index :=
1250 Index
1251 (Path (1 .. Path_Last),
1252 "/lib/");
1253
1254 if GCC_Index = 0 then
1255 GCC_Index :=
1256 Index (Path (1 .. Path_Last),
1257 Directory_Separator &
1258 "lib" &
1259 Directory_Separator);
1260 end if;
1261
1262 -- If we have found a "lib" subdir in
1263 -- the path to libgnat, the possible
1264 -- shared libgcc of interest by default
1265 -- is in libgcc_subdir at the same
1266 -- level.
1267
1268 if GCC_Index /= 0 then
1269 declare
1270 Subdir : constant String :=
1271 Value (Libgcc_Subdir_Ptr);
1272 begin
1273 Path
1274 (GCC_Index + 1 ..
1275 GCC_Index + Subdir'Length) :=
1276 Subdir;
1277 GCC_Index :=
1278 GCC_Index + Subdir'Length;
1279 end;
1280 end if;
1281 end if;
1282
1283 -- Look for an eventual run_path_option in
1284 -- the linker switches.
1285
1286 if Separate_Run_Path_Options then
1287 Linker_Options.Increment_Last;
1288 Linker_Options.Table
1289 (Linker_Options.Last) :=
1290 new String'
1291 (Run_Path_Opt
1292 & File_Path
1293 (1 .. File_Path'Length
1294 - File_Name'Length));
1295
1296 if GCC_Index /= 0 then
1297 Linker_Options.Increment_Last;
1298 Linker_Options.Table
1299 (Linker_Options.Last) :=
1300 new String'
1301 (Run_Path_Opt
1302 & Path (1 .. GCC_Index));
1303 end if;
1304
1305 else
1306 for J in reverse
1307 1 .. Linker_Options.Last
1308 loop
1309 if Linker_Options.Table (J) /= null
1310 and then
1311 Linker_Options.Table (J)'Length
1312 > Run_Path_Opt'Length
1313 and then
1314 Linker_Options.Table (J)
1315 (1 .. Run_Path_Opt'Length) =
1316 Run_Path_Opt
1317 then
1318 -- We have found an already
1319 -- specified run_path_option: we
1320 -- will add to this switch,
1321 -- because only one
1322 -- run_path_option should be
1323 -- specified.
1324
1325 Run_Path_Opt_Index := J;
1326 exit;
1327 end if;
1328 end loop;
1329
1330 -- If there is no run_path_option, we
1331 -- need to add one.
1332
1333 if Run_Path_Opt_Index = 0 then
1334 Linker_Options.Increment_Last;
1335 end if;
1336
1337 if GCC_Index = 0 then
1338 if Run_Path_Opt_Index = 0 then
1339 Linker_Options.Table
1340 (Linker_Options.Last) :=
1341 new String'
1342 (Run_Path_Opt
1343 & File_Path
1344 (1 .. File_Path'Length
1345 - File_Name'Length));
1346
1347 else
1348 Linker_Options.Table
1349 (Run_Path_Opt_Index) :=
1350 new String'
1351 (Linker_Options.Table
1352 (Run_Path_Opt_Index).all
1353 & Path_Separator
1354 & File_Path
1355 (1 .. File_Path'Length
1356 - File_Name'Length));
1357 end if;
1358
1359 else
1360 if Run_Path_Opt_Index = 0 then
1361 Linker_Options.Table
1362 (Linker_Options.Last) :=
1363 new String'
1364 (Run_Path_Opt
1365 & File_Path
1366 (1 .. File_Path'Length
1367 - File_Name'Length)
1368 & Path_Separator
1369 & Path (1 .. GCC_Index));
1370
1371 else
1372 Linker_Options.Table
1373 (Run_Path_Opt_Index) :=
1374 new String'
1375 (Linker_Options.Table
1376 (Run_Path_Opt_Index).all
1377 & Path_Separator
1378 & File_Path
1379 (1 .. File_Path'Length
1380 - File_Name'Length)
1381 & Path_Separator
1382 & Path (1 .. GCC_Index));
1383 end if;
1384 end if;
1385 end if;
1386 end;
1387 end if;
1388 end if;
1389
1390 -- Then we add the appropriate -l switch
1391
1392 Linker_Options.Increment_Last;
1393 Linker_Options.Table (Linker_Options.Last) :=
1394 new String'(Next_Line (Nfirst .. Nlast));
1395 end if;
1396
1397 else
1398 -- If gnatlib library not found, then
1399 -- add it anyway in case some other
1400 -- mechanism may find it.
1401
1402 Linker_Options.Increment_Last;
1403 Linker_Options.Table (Linker_Options.Last) :=
1404 new String'(Next_Line (Nfirst .. Nlast));
1405 end if;
1406 end;
1407 else
1408 Linker_Options.Increment_Last;
1409 Linker_Options.Table (Linker_Options.Last) :=
1410 new String'(Next_Line (Nfirst .. Nlast));
1411 end if;
1412 end if;
1413
1414 Xlinker_Was_Previous := Next_Line (Nfirst .. Nlast) = "-Xlinker";
1415
1416 Get_Next_Line;
1417 exit when Next_Line (Nfirst .. Nlast) = End_Info;
1418
1419 if Ada_Bind_File then
1420 Next_Line (Nfirst .. Nlast - 8) :=
1421 Next_Line (Nfirst + 8 .. Nlast);
1422 Nlast := Nlast - 8;
1423 end if;
1424 end loop;
1425 end if;
1426
1427 -- If -shared was specified, invoke gcc with -shared-libgcc
1428
1429 if GNAT_Shared then
1430 Linker_Options.Increment_Last;
1431 Linker_Options.Table (Linker_Options.Last) := Shared_Libgcc;
1432 end if;
1433
1434 Status := fclose (Fd);
1435 end Process_Binder_File;
1436
1437 -----------
1438 -- Usage --
1439 -----------
1440
1441 procedure Usage is
1442 begin
1443 Write_Str ("Usage: ");
1444 Write_Str (Base_Name (Command_Name));
1445 Write_Str (" switches mainprog.ali [non-Ada-objects] [linker-options]");
1446 Write_Eol;
1447 Write_Eol;
1448 Write_Line (" mainprog.ali the ALI file of the main program");
1449 Write_Eol;
1450 Write_Line (" -f force object file list to be generated");
1451 Write_Line (" -g Compile binder source file with debug information");
1452 Write_Line (" -n Do not compile the binder source file");
1453 Write_Line (" -R Do not use a run_path_option");
1454 Write_Line (" -v verbose mode");
1455 Write_Line (" -v -v very verbose mode");
1456 Write_Eol;
1457 Write_Line (" -o nam Use 'nam' as the name of the executable");
1458 Write_Line (" -b target Compile the binder source to run on target");
1459 Write_Line (" -Bdir Load compiler executables from dir");
1460
1461 if Is_Supported (Map_File) then
1462 Write_Line (" -Mmap Create map file map");
1463 Write_Line (" -M Create map file mainprog.map");
1464 end if;
1465
1466 Write_Line (" --GCC=comp Use comp as the compiler");
1467 Write_Line (" --LINK=nam Use 'nam' for the linking rather than 'gcc'");
1468 Write_Eol;
1469 Write_Line (" [non-Ada-objects] list of non Ada object files");
1470 Write_Line (" [linker-options] other options for the linker");
1471 end Usage;
1472
1473 ------------------
1474 -- Write_Header --
1475 ------------------
1476
1477 procedure Write_Header is
1478 begin
1479 if Verbose_Mode then
1480 Write_Eol;
1481 Display_Version ("GNATLINK", "1995");
1482 end if;
1483 end Write_Header;
1484
1485 -----------------
1486 -- Write_Usage --
1487 -----------------
1488
1489 procedure Write_Usage is
1490 begin
1491 Write_Header;
1492 Usage;
1493 end Write_Usage;
1494
1495 -- Start of processing for Gnatlink
1496
1497 begin
1498 -- Add the directory where gnatlink is invoked in front of the path, if
1499 -- gnatlink is invoked with directory information. Only do this if the
1500 -- platform is not VMS, where the notion of path does not really exist.
1501
1502 if not Hostparm.OpenVMS then
1503 declare
1504 Command : constant String := Command_Name;
1505
1506 begin
1507 for Index in reverse Command'Range loop
1508 if Command (Index) = Directory_Separator then
1509 declare
1510 Absolute_Dir : constant String :=
1511 Normalize_Pathname
1512 (Command (Command'First .. Index));
1513
1514 PATH : constant String :=
1515 Absolute_Dir &
1516 Path_Separator &
1517 Getenv ("PATH").all;
1518
1519 begin
1520 Setenv ("PATH", PATH);
1521 end;
1522
1523 exit;
1524 end if;
1525 end loop;
1526 end;
1527 end if;
1528
1529 Process_Args;
1530
1531 if Argument_Count = 0
1532 or else (Verbose_Mode and then Argument_Count = 1)
1533 then
1534 Write_Usage;
1535 Exit_Program (E_Fatal);
1536 end if;
1537
1538 -- Initialize packages to be used
1539
1540 Namet.Initialize;
1541 Csets.Initialize;
1542 Snames.Initialize;
1543
1544 -- We always compile with -c
1545
1546 Binder_Options_From_ALI.Increment_Last;
1547 Binder_Options_From_ALI.Table (Binder_Options_From_ALI.Last) :=
1548 new String'("-c");
1549
1550 if Ali_File_Name = null then
1551 Exit_With_Error ("no ali file given for link");
1552 end if;
1553
1554 if not Is_Regular_File (Ali_File_Name.all) then
1555 Exit_With_Error (Ali_File_Name.all & " not found");
1556 end if;
1557
1558 -- Read the ALI file of the main subprogram if the binder generated file
1559 -- needs to be compiled and no --GCC= switch has been specified. Fetch the
1560 -- back end switches from this ALI file and use these switches to compile
1561 -- the binder generated file
1562
1563 if Compile_Bind_File and then Standard_Gcc then
1564
1565 Initialize_ALI;
1566 Name_Len := Ali_File_Name'Length;
1567 Name_Buffer (1 .. Name_Len) := Ali_File_Name.all;
1568
1569 declare
1570 use Types;
1571 F : constant File_Name_Type := Name_Find;
1572 T : Text_Buffer_Ptr;
1573 A : ALI_Id;
1574
1575 begin
1576 -- Load the ALI file
1577
1578 T := Read_Library_Info (F, True);
1579
1580 -- Read it. Note that we ignore errors, since we only want very
1581 -- limited information from the ali file, and likely a slightly
1582 -- wrong version will be just fine, though in normal operation
1583 -- we don't expect this to happen!
1584
1585 A := Scan_ALI
1586 (F,
1587 T,
1588 Ignore_ED => False,
1589 Err => False,
1590 Ignore_Errors => True);
1591
1592 if A /= No_ALI_Id then
1593 for
1594 Index in Units.Table (ALIs.Table (A).First_Unit).First_Arg ..
1595 Units.Table (ALIs.Table (A).First_Unit).Last_Arg
1596 loop
1597 -- Do not compile with the front end switches. However, --RTS
1598 -- is to be dealt with specially because it needs to be passed
1599 -- if the binder-generated file is in Ada and may also be used
1600 -- to drive the linker.
1601
1602 declare
1603 Arg : String_Ptr renames Args.Table (Index);
1604 begin
1605 if not Is_Front_End_Switch (Arg.all) then
1606 Binder_Options_From_ALI.Increment_Last;
1607 Binder_Options_From_ALI.Table
1608 (Binder_Options_From_ALI.Last) := String_Access (Arg);
1609
1610 elsif Arg'Length > 5
1611 and then Arg (Arg'First + 2 .. Arg'First + 5) = "RTS="
1612 then
1613 if Ada_Bind_File then
1614 Binder_Options_From_ALI.Increment_Last;
1615 Binder_Options_From_ALI.Table
1616 (Binder_Options_From_ALI.Last)
1617 := String_Access (Arg);
1618 end if;
1619
1620 -- Set the RTS_*_Path_Name variables, so that
1621 -- the correct directories will be set when
1622 -- Osint.Add_Default_Search_Dirs will be called later.
1623
1624 Opt.RTS_Src_Path_Name :=
1625 Get_RTS_Search_Dir
1626 (Arg (Arg'First + 6 .. Arg'Last), Include);
1627
1628 Opt.RTS_Lib_Path_Name :=
1629 Get_RTS_Search_Dir
1630 (Arg (Arg'First + 6 .. Arg'Last), Objects);
1631
1632 -- GNAT doesn't support the GCC multilib mechanism.
1633 -- This means that, when a multilib switch is used
1634 -- to request a particular compilation mode, the
1635 -- corresponding runtime switch (--RTS) must also be
1636 -- specified. The long-term goal is to fully support the
1637 -- multilib mechanism; however, in the meantime, it is
1638 -- convenient to eliminate the redundancy by keying the
1639 -- compilation mode on a single switch, namely --RTS.
1640
1641 -- Pass -mrtp to the linker if --RTS=rtp was passed
1642
1643 if Arg'Length > 8
1644 and then Arg (Arg'First + 6 .. Arg'First + 8) = "rtp"
1645 then
1646 Linker_Options.Increment_Last;
1647 Linker_Options.Table (Linker_Options.Last) :=
1648 new String'("-mrtp");
1649 end if;
1650 end if;
1651 end;
1652 end loop;
1653 end if;
1654 end;
1655 end if;
1656
1657 -- Get target parameters
1658
1659 Osint.Add_Default_Search_Dirs;
1660 Targparm.Get_Target_Parameters;
1661
1662 if VM_Target /= No_VM then
1663 case VM_Target is
1664 when JVM_Target => Gcc := new String'("jvm-gnatcompile");
1665 when CLI_Target => Gcc := new String'("dotnet-gnatcompile");
1666 when No_VM => raise Program_Error;
1667 end case;
1668
1669 Ada_Bind_File := True;
1670 Begin_Info := "-- BEGIN Object file/option list";
1671 End_Info := "-- END Object file/option list ";
1672 end if;
1673
1674 -- If the main program is in Ada it is compiled with the following
1675 -- switches:
1676
1677 -- -gnatA stops reading gnat.adc, since we don't know what
1678 -- pragmas would work, and we do not need it anyway.
1679
1680 -- -gnatWb allows brackets coding for wide characters
1681
1682 -- -gnatiw allows wide characters in identifiers. This is needed
1683 -- because bindgen uses brackets encoding for all upper
1684 -- half and wide characters in identifier names.
1685
1686 if Ada_Bind_File then
1687 Binder_Options_From_ALI.Increment_Last;
1688 Binder_Options_From_ALI.Table (Binder_Options_From_ALI.Last) :=
1689 new String'("-gnatA");
1690 Binder_Options_From_ALI.Increment_Last;
1691 Binder_Options_From_ALI.Table (Binder_Options_From_ALI.Last) :=
1692 new String'("-gnatWb");
1693 Binder_Options_From_ALI.Increment_Last;
1694 Binder_Options_From_ALI.Table (Binder_Options_From_ALI.Last) :=
1695 new String'("-gnatiw");
1696 end if;
1697
1698 -- Locate all the necessary programs and verify required files are present
1699
1700 Gcc_Path := System.OS_Lib.Locate_Exec_On_Path (Gcc.all);
1701
1702 if Gcc_Path = null then
1703 Exit_With_Error ("Couldn't locate " & Gcc.all);
1704 end if;
1705
1706 if Linker_Path = null then
1707 if VM_Target = CLI_Target then
1708 Linker_Path := System.OS_Lib.Locate_Exec_On_Path ("ilasm");
1709
1710 if Linker_Path = null then
1711 Exit_With_Error ("Couldn't locate ilasm");
1712 end if;
1713
1714 elsif RTX_RTSS_Kernel_Module_On_Target then
1715
1716 -- Use Microsoft linker for RTSS modules
1717
1718 Linker_Path := System.OS_Lib.Locate_Exec_On_Path ("link");
1719
1720 if Linker_Path = null then
1721 Exit_With_Error ("Couldn't locate link");
1722 end if;
1723
1724 else
1725 Linker_Path := Gcc_Path;
1726 end if;
1727 end if;
1728
1729 Write_Header;
1730
1731 -- If no output name specified, then use the base name of .ali file name
1732
1733 if Output_File_Name = null then
1734 Output_File_Name :=
1735 new String'(Base_Name (Ali_File_Name.all)
1736 & Get_Target_Debuggable_Suffix.all);
1737 end if;
1738
1739 if VM_Target = CLI_Target then
1740 Linker_Options.Increment_Last;
1741 Linker_Options.Table (Linker_Options.Last) := new String'("/QUIET");
1742
1743 Linker_Options.Increment_Last;
1744 Linker_Options.Table (Linker_Options.Last) := new String'("/DEBUG");
1745
1746 Linker_Options.Increment_Last;
1747 Linker_Options.Table (Linker_Options.Last) :=
1748 new String'("/OUTPUT=" & Output_File_Name.all);
1749
1750 elsif RTX_RTSS_Kernel_Module_On_Target then
1751 Linker_Options.Increment_Last;
1752 Linker_Options.Table (Linker_Options.Last) :=
1753 new String'("/OUT:" & Output_File_Name.all);
1754
1755 else
1756 Linker_Options.Increment_Last;
1757 Linker_Options.Table (Linker_Options.Last) := new String'("-o");
1758
1759 Linker_Options.Increment_Last;
1760 Linker_Options.Table (Linker_Options.Last) :=
1761 new String'(Output_File_Name.all);
1762 end if;
1763
1764 -- Delete existing executable, in case it is a symbolic link, to avoid
1765 -- modifying the target of the symbolic link.
1766
1767 declare
1768 Dummy : Boolean;
1769 pragma Unreferenced (Dummy);
1770
1771 begin
1772 Delete_File (Output_File_Name.all, Dummy);
1773 end;
1774
1775 -- Warn if main program is called "test", as that may be a built-in command
1776 -- on Unix. On non-Unix systems executables have a suffix, so the warning
1777 -- will not appear. However, do not warn in the case of a cross compiler.
1778
1779 -- Assume this is a cross tool if the executable name is not gnatlink
1780
1781 if Base_Name (Command_Name) = "gnatlink"
1782 and then Output_File_Name.all = "test"
1783 then
1784 Error_Msg ("warning: executable name """ & Output_File_Name.all
1785 & """ may conflict with shell command");
1786 end if;
1787
1788 -- If -M switch was specified, add the switches to create the map file
1789
1790 if Create_Map_File then
1791 declare
1792 Map_Name : constant String := Base_Name (Ali_File_Name.all) & ".map";
1793 Switches : String_List_Access;
1794
1795 begin
1796 Convert (Map_File, Map_Name, Switches);
1797
1798 if Switches /= null then
1799 for J in Switches'Range loop
1800 Linker_Options.Increment_Last;
1801 Linker_Options.Table (Linker_Options.Last) := Switches (J);
1802 end loop;
1803 end if;
1804 end;
1805 end if;
1806
1807 -- Perform consistency checks
1808
1809 -- Transform the .ali file name into the binder output file name
1810
1811 Make_Binder_File_Names : declare
1812 Fname : constant String := Base_Name (Ali_File_Name.all);
1813 Fname_Len : Integer := Fname'Length;
1814
1815 function Get_Maximum_File_Name_Length return Integer;
1816 pragma Import (C, Get_Maximum_File_Name_Length,
1817 "__gnat_get_maximum_file_name_length");
1818
1819 Maximum_File_Name_Length : constant Integer :=
1820 Get_Maximum_File_Name_Length;
1821
1822 Bind_File_Prefix : Types.String_Ptr;
1823 -- Contains prefix used for bind files
1824
1825 begin
1826 -- Set prefix
1827
1828 if not Ada_Bind_File then
1829 Bind_File_Prefix := new String'("b_");
1830 elsif OpenVMS_On_Target then
1831 Bind_File_Prefix := new String'("b__");
1832 else
1833 Bind_File_Prefix := new String'("b~");
1834 end if;
1835
1836 -- If the length of the binder file becomes too long due to
1837 -- the addition of the "b?" prefix, then truncate it.
1838
1839 if Maximum_File_Name_Length > 0 then
1840 while Fname_Len >
1841 Maximum_File_Name_Length - Bind_File_Prefix.all'Length
1842 loop
1843 Fname_Len := Fname_Len - 1;
1844 end loop;
1845 end if;
1846
1847 declare
1848 Fnam : constant String :=
1849 Bind_File_Prefix.all &
1850 Fname (Fname'First .. Fname'First + Fname_Len - 1);
1851
1852 begin
1853 if Ada_Bind_File then
1854 Binder_Spec_Src_File := new String'(Fnam & ".ads");
1855 Binder_Body_Src_File := new String'(Fnam & ".adb");
1856 Binder_Ali_File := new String'(Fnam & ".ali");
1857 else
1858 Binder_Body_Src_File := new String'(Fnam & ".c");
1859 end if;
1860
1861 Binder_Obj_File := new String'(Fnam & Get_Target_Object_Suffix.all);
1862 end;
1863
1864 if Fname_Len /= Fname'Length then
1865 Binder_Options.Increment_Last;
1866 Binder_Options.Table (Binder_Options.Last) := new String'("-o");
1867 Binder_Options.Increment_Last;
1868 Binder_Options.Table (Binder_Options.Last) := Binder_Obj_File;
1869 end if;
1870 end Make_Binder_File_Names;
1871
1872 Process_Binder_File (Binder_Body_Src_File.all & ASCII.NUL);
1873
1874 -- Compile the binder file. This is fast, so we always do it, unless
1875 -- specifically told not to by the -n switch
1876
1877 if Compile_Bind_File then
1878 Bind_Step : declare
1879 Success : Boolean;
1880 Args : Argument_List
1881 (1 .. Binder_Options_From_ALI.Last + Binder_Options.Last + 1);
1882
1883 begin
1884 for J in 1 .. Binder_Options_From_ALI.Last loop
1885 Args (J) := Binder_Options_From_ALI.Table (J);
1886 end loop;
1887
1888 for J in 1 .. Binder_Options.Last loop
1889 Args (Binder_Options_From_ALI.Last + J) :=
1890 Binder_Options.Table (J);
1891 end loop;
1892
1893 -- Use the full path of the binder generated source, so that it is
1894 -- guaranteed that the debugger will find this source, even with
1895 -- STABS.
1896
1897 Args (Args'Last) :=
1898 new String'(Normalize_Pathname (Binder_Body_Src_File.all));
1899
1900 if Verbose_Mode then
1901 Write_Str (Base_Name (Gcc_Path.all));
1902
1903 for J in Args'Range loop
1904 Write_Str (" ");
1905 Write_Str (Args (J).all);
1906 end loop;
1907
1908 Write_Eol;
1909 end if;
1910
1911 System.OS_Lib.Spawn (Gcc_Path.all, Args, Success);
1912
1913 if not Success then
1914 Exit_Program (E_Fatal);
1915 end if;
1916 end Bind_Step;
1917 end if;
1918
1919 -- Now, actually link the program
1920
1921 -- Skip this step for now on JVM since the Java interpreter will do
1922 -- the actual link at run time. We might consider packing all class files
1923 -- in a .zip file during this step.
1924
1925 if VM_Target /= JVM_Target then
1926 Link_Step : declare
1927 Num_Args : Natural :=
1928 (Linker_Options.Last - Linker_Options.First + 1) +
1929 (Gcc_Linker_Options.Last - Gcc_Linker_Options.First + 1) +
1930 (Linker_Objects.Last - Linker_Objects.First + 1);
1931 Stack_Op : Boolean := False;
1932 IDENT_Op : Boolean := False;
1933
1934 begin
1935 if VM_Target = CLI_Target then
1936
1937 -- Remove extraneous flags not relevant for CIL. Also remove empty
1938 -- arguments, since ilasm chokes on them.
1939
1940 for J in reverse Linker_Options.First .. Linker_Options.Last loop
1941 if Linker_Options.Table (J)'Length = 0
1942 or else Linker_Options.Table (J) (1 .. 2) = "-L"
1943 or else Linker_Options.Table (J) (1 .. 2) = "-l"
1944 or else Linker_Options.Table (J) (1 .. 3) = "-Wl"
1945 or else Linker_Options.Table (J) (1 .. 3) = "-sh"
1946 or else Linker_Options.Table (J) (1 .. 2) = "-g"
1947 then
1948 Linker_Options.Table (J .. Linker_Options.Last - 1) :=
1949 Linker_Options.Table (J + 1 .. Linker_Options.Last);
1950 Linker_Options.Decrement_Last;
1951 Num_Args := Num_Args - 1;
1952 end if;
1953 end loop;
1954
1955 elsif RTX_RTSS_Kernel_Module_On_Target then
1956
1957 -- Remove flags not relevant for Microsoft linker and adapt some
1958 -- others.
1959
1960 for J in reverse Linker_Options.First .. Linker_Options.Last loop
1961
1962 -- Remove flags that are not accepted
1963 if Linker_Options.Table (J)'Length = 0
1964 or else Linker_Options.Table (J) (1 .. 2) = "-l"
1965 or else Linker_Options.Table (J) (1 .. 3) = "-Wl"
1966 or else Linker_Options.Table (J) (1 .. 3) = "-sh"
1967 or else Linker_Options.Table (J) (1 .. 8) = "-Xlinker"
1968 or else Linker_Options.Table (J) (1 .. 9) = "-mthreads"
1969 then
1970 Linker_Options.Table (J .. Linker_Options.Last - 1) :=
1971 Linker_Options.Table (J + 1 .. Linker_Options.Last);
1972 Linker_Options.Decrement_Last;
1973 Num_Args := Num_Args - 1;
1974
1975 -- Replace "-L" by its counterpart "/LIBPATH:" and UNIX "/" by
1976 -- Windows "\".
1977 elsif Linker_Options.Table (J) (1 .. 2) = "-L" then
1978 declare
1979 Libpath_Option : constant String_Access := new String'
1980 ("/LIBPATH:" &
1981 Linker_Options.Table (J)
1982 (3 .. Linker_Options.Table (J).all'Last));
1983 begin
1984 for Index in 10 .. Libpath_Option'Last loop
1985 if Libpath_Option (Index) = '/' then
1986 Libpath_Option (Index) := '\';
1987 end if;
1988 end loop;
1989
1990 Linker_Options.Table (J) := Libpath_Option;
1991 end;
1992
1993 -- Replace "-g" by "/DEBUG"
1994 elsif Linker_Options.Table (J) (1 .. 2) = "-g" then
1995 Linker_Options.Table (J) := new String'("/DEBUG");
1996
1997 -- Replace "-o" by "/OUT:"
1998 elsif Linker_Options.Table (J) (1 .. 2) = "-o" then
1999 Linker_Options.Table (J + 1) := new String'
2000 ("/OUT:" & Linker_Options.Table (J + 1).all);
2001
2002 Linker_Options.Table (J .. Linker_Options.Last - 1) :=
2003 Linker_Options.Table (J + 1 .. Linker_Options.Last);
2004 Linker_Options.Decrement_Last;
2005 Num_Args := Num_Args - 1;
2006
2007 -- Replace "--stack=" by "/STACK:"
2008 elsif Linker_Options.Table (J) (1 .. 8) = "--stack=" then
2009 Linker_Options.Table (J) := new String'
2010 ("/STACK:" &
2011 Linker_Options.Table (J)
2012 (9 .. Linker_Options.Table (J).all'Last));
2013
2014 -- Replace "-v" by its counterpart "/VERBOSE"
2015 elsif Linker_Options.Table (J) (1 .. 2) = "-v" then
2016 Linker_Options.Table (J) := new String'("/VERBOSE");
2017 end if;
2018 end loop;
2019
2020 -- Add some required flags to create RTSS modules
2021
2022 declare
2023 Flags_For_Linker : constant array (1 .. 17) of String_Access :=
2024 (new String'("/NODEFAULTLIB"),
2025 new String'("/INCREMENTAL:NO"),
2026 new String'("/NOLOGO"),
2027 new String'("/DRIVER"),
2028 new String'("/ALIGN:0x20"),
2029 new String'("/SUBSYSTEM:NATIVE"),
2030 new String'("/ENTRY:_RtapiProcessEntryCRT@8"),
2031 new String'("/RELEASE"),
2032 new String'("startupCRT.obj"),
2033 new String'("rtxlibcmt.lib"),
2034 new String'("oldnames.lib"),
2035 new String'("rtapi_rtss.lib"),
2036 new String'("Rtx_Rtss.lib"),
2037 new String'("libkernel32.a"),
2038 new String'("libws2_32.a"),
2039 new String'("libmswsock.a"),
2040 new String'("libadvapi32.a"));
2041 -- These flags need to be passed to Microsoft linker. They
2042 -- come from the RTX documentation.
2043
2044 Gcc_Lib_Path : constant String_Access := new String'
2045 ("/LIBPATH:" & Include_Dir_Default_Prefix & "\..\");
2046 -- Place to look for gcc related libraries, such as libgcc
2047
2048 begin
2049 -- Replace UNIX "/" by Windows "\" in the path
2050
2051 for Index in 10 .. Gcc_Lib_Path.all'Last loop
2052 if Gcc_Lib_Path (Index) = '/' then
2053 Gcc_Lib_Path (Index) := '\';
2054 end if;
2055 end loop;
2056
2057 Linker_Options.Increment_Last;
2058 Linker_Options.Table (Linker_Options.Last) := Gcc_Lib_Path;
2059 Num_Args := Num_Args + 1;
2060
2061 for Index in Flags_For_Linker'Range loop
2062 Linker_Options.Increment_Last;
2063 Linker_Options.Table (Linker_Options.Last) :=
2064 Flags_For_Linker (Index);
2065 Num_Args := Num_Args + 1;
2066 end loop;
2067 end;
2068 end if;
2069
2070 -- Remove duplicate stack size setting from the Linker_Options
2071 -- table. The stack setting option "-Xlinker --stack=R,C" can be
2072 -- found in one line when set by a pragma Linker_Options or in two
2073 -- lines ("-Xlinker" then "--stack=R,C") when set on the command
2074 -- line. We also check for the "-Wl,--stack=R" style option.
2075
2076 -- We must remove the second stack setting option instance
2077 -- because the one on the command line will always be the first
2078 -- one. And any subsequent stack setting option will overwrite the
2079 -- previous one. This is done especially for GNAT/NT where we set
2080 -- the stack size for tasking programs by a pragma in the NT
2081 -- specific tasking package System.Task_Primitives.Operations.
2082
2083 -- Note: This is not a FOR loop that runs from Linker_Options.First
2084 -- to Linker_Options.Last, since operations within the loop can
2085 -- modify the length of the table.
2086
2087 Clean_Link_Option_Set : declare
2088 J : Natural := Linker_Options.First;
2089 Shared_Libgcc_Seen : Boolean := False;
2090
2091 begin
2092 while J <= Linker_Options.Last loop
2093
2094 if Linker_Options.Table (J).all = "-Xlinker"
2095 and then J < Linker_Options.Last
2096 and then Linker_Options.Table (J + 1)'Length > 8
2097 and then Linker_Options.Table (J + 1) (1 .. 8) = "--stack="
2098 then
2099 if Stack_Op then
2100 Linker_Options.Table (J .. Linker_Options.Last - 2) :=
2101 Linker_Options.Table (J + 2 .. Linker_Options.Last);
2102 Linker_Options.Decrement_Last;
2103 Linker_Options.Decrement_Last;
2104 Num_Args := Num_Args - 2;
2105
2106 else
2107 Stack_Op := True;
2108 end if;
2109 end if;
2110
2111 -- Remove duplicate -shared-libgcc switch
2112
2113 if Linker_Options.Table (J).all = Shared_Libgcc_String then
2114 if Shared_Libgcc_Seen then
2115 Linker_Options.Table (J .. Linker_Options.Last - 1) :=
2116 Linker_Options.Table (J + 1 .. Linker_Options.Last);
2117 Linker_Options.Decrement_Last;
2118 Num_Args := Num_Args - 1;
2119
2120 else
2121 Shared_Libgcc_Seen := True;
2122 end if;
2123 end if;
2124
2125 -- Here we just check for a canonical form that matches the
2126 -- pragma Linker_Options set in the NT runtime.
2127
2128 if (Linker_Options.Table (J)'Length > 17
2129 and then Linker_Options.Table (J) (1 .. 17)
2130 = "-Xlinker --stack=")
2131 or else
2132 (Linker_Options.Table (J)'Length > 12
2133 and then Linker_Options.Table (J) (1 .. 12)
2134 = "-Wl,--stack=")
2135 then
2136 if Stack_Op then
2137 Linker_Options.Table (J .. Linker_Options.Last - 1) :=
2138 Linker_Options.Table (J + 1 .. Linker_Options.Last);
2139 Linker_Options.Decrement_Last;
2140 Num_Args := Num_Args - 1;
2141
2142 else
2143 Stack_Op := True;
2144 end if;
2145 end if;
2146
2147 -- Remove duplicate IDENTIFICATION directives (VMS)
2148
2149 if Linker_Options.Table (J)'Length > 27
2150 and then Linker_Options.Table (J) (1 .. 28)
2151 = "--for-linker=IDENTIFICATION="
2152 then
2153 if IDENT_Op then
2154 Linker_Options.Table (J .. Linker_Options.Last - 1) :=
2155 Linker_Options.Table (J + 1 .. Linker_Options.Last);
2156 Linker_Options.Decrement_Last;
2157 Num_Args := Num_Args - 1;
2158 else
2159 IDENT_Op := True;
2160 end if;
2161 end if;
2162
2163 J := J + 1;
2164 end loop;
2165
2166 if Linker_Path = Gcc_Path and then VM_Target = No_VM then
2167
2168 -- For systems where the default is to link statically with
2169 -- libgcc, if gcc is not called with -shared-libgcc, call it
2170 -- with -static-libgcc, as there are some platforms where one
2171 -- of these two switches is compulsory to link.
2172
2173 if Shared_Libgcc_Default = 'T'
2174 and then not Shared_Libgcc_Seen
2175 then
2176 Linker_Options.Increment_Last;
2177 Linker_Options.Table (Linker_Options.Last) := Static_Libgcc;
2178 Num_Args := Num_Args + 1;
2179 end if;
2180
2181 elsif RTX_RTSS_Kernel_Module_On_Target then
2182
2183 -- Force the use of the static libgcc for RTSS modules
2184
2185 Linker_Options.Increment_Last;
2186 Linker_Options.Table (Linker_Options.Last) :=
2187 new String'("libgcc.a");
2188 Num_Args := Num_Args + 1;
2189 end if;
2190
2191 end Clean_Link_Option_Set;
2192
2193 -- Prepare arguments for call to linker
2194
2195 Call_Linker : declare
2196 Success : Boolean;
2197 Args : Argument_List (1 .. Num_Args + 1);
2198 Index : Integer := Args'First;
2199
2200 begin
2201 Args (Index) := Binder_Obj_File;
2202
2203 -- Add the object files and any -largs libraries
2204
2205 for J in Linker_Objects.First .. Linker_Objects.Last loop
2206 Index := Index + 1;
2207 Args (Index) := Linker_Objects.Table (J);
2208 end loop;
2209
2210 -- Add the linker options from the binder file
2211
2212 for J in Linker_Options.First .. Linker_Options.Last loop
2213 Index := Index + 1;
2214 Args (Index) := Linker_Options.Table (J);
2215 end loop;
2216
2217 -- Finally add the libraries from the --GCC= switch
2218
2219 for J in Gcc_Linker_Options.First .. Gcc_Linker_Options.Last loop
2220 Index := Index + 1;
2221 Args (Index) := Gcc_Linker_Options.Table (J);
2222 end loop;
2223
2224 if Verbose_Mode then
2225 Write_Str (Linker_Path.all);
2226
2227 for J in Args'Range loop
2228 Write_Str (" ");
2229 Write_Str (Args (J).all);
2230 end loop;
2231
2232 Write_Eol;
2233
2234 -- If we are on very verbose mode (-v -v) and a response file
2235 -- is used we display its content.
2236
2237 if Very_Verbose_Mode and then Tname_FD /= Invalid_FD then
2238 Write_Eol;
2239 Write_Str ("Response file (" &
2240 Tname (Tname'First .. Tname'Last - 1) &
2241 ") content : ");
2242 Write_Eol;
2243
2244 for J in
2245 Response_File_Objects.First ..
2246 Response_File_Objects.Last
2247 loop
2248 Write_Str (Response_File_Objects.Table (J).all);
2249 Write_Eol;
2250 end loop;
2251
2252 Write_Eol;
2253 end if;
2254 end if;
2255
2256 System.OS_Lib.Spawn (Linker_Path.all, Args, Success);
2257
2258 -- Delete the temporary file used in conjunction with linking if
2259 -- one was created. See Process_Bind_File for details.
2260
2261 if Tname_FD /= Invalid_FD then
2262 Delete (Tname);
2263 end if;
2264
2265 if Lname /= null then
2266 Delete (Lname.all & ASCII.NUL);
2267 end if;
2268
2269 if not Success then
2270 Error_Msg ("error when calling " & Linker_Path.all);
2271 Exit_Program (E_Fatal);
2272 end if;
2273 end Call_Linker;
2274 end Link_Step;
2275 end if;
2276
2277 -- Only keep the binder output file and it's associated object
2278 -- file if compiling with the -g option. These files are only
2279 -- useful if debugging.
2280
2281 if not Debug_Flag_Present then
2282 if Binder_Ali_File /= null then
2283 Delete (Binder_Ali_File.all & ASCII.NUL);
2284 end if;
2285
2286 if Binder_Spec_Src_File /= null then
2287 Delete (Binder_Spec_Src_File.all & ASCII.NUL);
2288 end if;
2289
2290 Delete (Binder_Body_Src_File.all & ASCII.NUL);
2291
2292 if VM_Target = No_VM then
2293 Delete (Binder_Obj_File.all & ASCII.NUL);
2294 end if;
2295 end if;
2296
2297 Exit_Program (E_Success);
2298
2299 exception
2300 when X : others =>
2301 Write_Line (Exception_Information (X));
2302 Exit_With_Error ("INTERNAL ERROR. Please report");
2303 end Gnatlink;