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2014-01-30 Richard Biener <rguenther@suse.de>
[official-gcc.git] / gcc / ada / gnatlink.adb
blobce8f3d18b65b494d76ca8ebef7e79e3be0b7c81f
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) 1996-2013, 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 : constant String := "-- BEGIN Object file/option list";
145 End_Info : constant String := "-- END Object file/option list ";
146
147 Gcc_Path : String_Access;
148 Linker_Path : String_Access;
149 Output_File_Name : String_Access;
150 Ali_File_Name : String_Access;
151 Binder_Spec_Src_File : String_Access;
152 Binder_Body_Src_File : String_Access;
153 Binder_Ali_File : String_Access;
154 Binder_Obj_File : String_Access;
155
156 Base_Command_Name : String_Access;
157
158 Tname : Temp_File_Name;
159 Tname_FD : File_Descriptor := Invalid_FD;
160 -- Temporary file used by linker to pass list of object files on
161 -- certain systems with limitations on size of arguments.
162
163 Debug_Flag_Present : Boolean := False;
164 Verbose_Mode : Boolean := False;
165 Very_Verbose_Mode : Boolean := False;
166
167 Standard_Gcc : Boolean := True;
168
169 Compile_Bind_File : Boolean := True;
170 -- Set to False if bind file is not to be compiled
171
172 Create_Map_File : Boolean := False;
173 -- Set to True by switch -M. The map file name is derived from
174 -- the ALI file name (mainprog.ali => mainprog.map).
175
176 Object_List_File_Supported : Boolean;
177 for Object_List_File_Supported'Size use Character'Size;
178 pragma Import
179 (C, Object_List_File_Supported, "__gnat_objlist_file_supported");
180 -- Predicate indicating whether the linker has an option whereby the
181 -- names of object files can be passed to the linker in a file.
182
183 Object_File_Option_Ptr : Interfaces.C.Strings.chars_ptr;
184 pragma Import (C, Object_File_Option_Ptr, "__gnat_object_file_option");
185 -- Pointer to a string representing the linker option which specifies
186 -- the response file.
187
188 Object_File_Option : constant String := Value (Object_File_Option_Ptr);
189 -- The linker option which specifies the response file as a string
190
191 Using_GNU_response_file : constant Boolean :=
192 Object_File_Option'Length > 0
193 and then Object_File_Option (Object_File_Option'Last) = '@';
194 -- Whether a GNU response file is used
195
196 Object_List_File_Required : Boolean := False;
197 -- Set to True to force generation of a response file
198
199 Shared_Libgcc_Default : Character;
200 for Shared_Libgcc_Default'Size use Character'Size;
201 pragma Import
202 (C, Shared_Libgcc_Default, "__gnat_shared_libgcc_default");
203 -- Indicates wether libgcc should be statically linked (use 'T') or
204 -- dynamically linked (use 'H') by default.
205
206 function Base_Name (File_Name : String) return String;
207 -- Return just the file name part without the extension (if present)
208
209 procedure Check_Existing_Executable (File_Name : String);
210 -- Delete any existing executable to avoid accidentally updating the target
211 -- of a symbolic link, but produce a Fatail_Error if File_Name matches any
212 -- of the source file names. This avoids overwriting of extensionless
213 -- source files by accident on systems where executables do not have
214 -- extensions.
215
216 procedure Delete (Name : String);
217 -- Wrapper to unlink as status is ignored by this application
218
219 procedure Error_Msg (Message : String);
220 -- Output the error or warning Message
221
222 procedure Exit_With_Error (Error : String);
223 -- Output Error and exit program with a fatal condition
224
225 procedure Process_Args;
226 -- Go through all the arguments and build option tables
227
228 procedure Process_Binder_File (Name : String);
229 -- Reads the binder file and extracts linker arguments
230
231 function To_Lower (A : Character) return Character;
232 -- Fold a character to lower case;
233
234 procedure To_Lower (A : in out String);
235 -- Fold a string to lower case;
236
237 procedure Usage;
238 -- Display usage
239
240 procedure Write_Header;
241 -- Show user the program name, version and copyright
242
243 procedure Write_Usage;
244 -- Show user the program options
245
246 ---------------
247 -- Base_Name --
248 ---------------
249
250 function Base_Name (File_Name : String) return String is
251 Findex1 : Natural;
252 Findex2 : Natural;
253
254 begin
255 Findex1 := File_Name'First;
256
257 -- The file might be specified by a full path name. However,
258 -- we want the path to be stripped away.
259
260 for J in reverse File_Name'Range loop
261 if Is_Directory_Separator (File_Name (J)) then
262 Findex1 := J + 1;
263 exit;
264 end if;
265 end loop;
266
267 Findex2 := File_Name'Last;
268 while Findex2 > Findex1 and then File_Name (Findex2) /= '.' loop
269 Findex2 := Findex2 - 1;
270 end loop;
271
272 if Findex2 = Findex1 then
273 Findex2 := File_Name'Last + 1;
274 end if;
275
276 return File_Name (Findex1 .. Findex2 - 1);
277 end Base_Name;
278
279 -------------------------------
280 -- Check_Existing_Executable --
281 -------------------------------
282
283 procedure Check_Existing_Executable (File_Name : String) is
284 Ename : String := File_Name;
285 Efile : File_Name_Type;
286 Sfile : File_Name_Type;
287
288 begin
289 Canonical_Case_File_Name (Ename);
290 Name_Len := 0;
291 Add_Str_To_Name_Buffer (Ename);
292 Efile := Name_Find;
293
294 for J in Units.Table'First .. Units.Last loop
295 Sfile := Units.Table (J).Sfile;
296 if Sfile = Efile then
297 Exit_With_Error
298 ("executable name """ & File_Name & """ matches "
299 & "source file name """ & Get_Name_String (Sfile) & """");
300 end if;
301 end loop;
302
303 Delete (File_Name);
304 end Check_Existing_Executable;
305
306 ------------
307 -- Delete --
308 ------------
309
310 procedure Delete (Name : String) is
311 Status : int;
312 pragma Unreferenced (Status);
313 begin
314 Status := unlink (Name'Address);
315 -- Is it really right to ignore an error here ???
316 end Delete;
317
318 ---------------
319 -- Error_Msg --
320 ---------------
321
322 procedure Error_Msg (Message : String) is
323 begin
324 Write_Str (Base_Command_Name.all);
325 Write_Str (": ");
326 Write_Str (Message);
327 Write_Eol;
328 end Error_Msg;
329
330 ---------------------
331 -- Exit_With_Error --
332 ---------------------
333
334 procedure Exit_With_Error (Error : String) is
335 begin
336 Error_Msg (Error);
337 Exit_Program (E_Fatal);
338 end Exit_With_Error;
339
340 ------------------
341 -- Process_Args --
342 ------------------
343
344 procedure Process_Args is
345 Next_Arg : Integer;
346
347 Skip_Next : Boolean := False;
348 -- Set to true if the next argument is to be added into the list of
349 -- linker's argument without parsing it.
350
351 procedure Check_Version_And_Help is new Check_Version_And_Help_G (Usage);
352
353 -- Start of processing for Process_Args
354
355 begin
356 -- First, check for --version and --help
357
358 Check_Version_And_Help ("GNATLINK", "1996");
359
360 -- Loop through arguments of gnatlink command
361
362 Next_Arg := 1;
363 loop
364 exit when Next_Arg > Argument_Count;
365
366 Process_One_Arg : declare
367 Arg : constant String := Argument (Next_Arg);
368
369 begin
370 -- Case of argument which is a switch
371
372 -- We definitely need section by section comments here ???
373
374 if Skip_Next then
375
376 -- This argument must not be parsed, just add it to the
377 -- list of linker's options.
378
379 Skip_Next := False;
380
381 Linker_Options.Increment_Last;
382 Linker_Options.Table (Linker_Options.Last) :=
383 new String'(Arg);
384
385 elsif Arg'Length /= 0 and then Arg (1) = '-' then
386 if Arg'Length > 4 and then Arg (2 .. 5) = "gnat" then
387 Exit_With_Error
388 ("invalid switch: """ & Arg & """ (gnat not needed here)");
389 end if;
390
391 if Arg = "-Xlinker" then
392
393 -- Next argument should be sent directly to the linker.
394 -- We do not want to parse it here.
395
396 Skip_Next := True;
397
398 Linker_Options.Increment_Last;
399 Linker_Options.Table (Linker_Options.Last) :=
400 new String'(Arg);
401
402 elsif Arg (2) = 'g'
403 and then (Arg'Length < 5 or else Arg (2 .. 5) /= "gnat")
404 then
405 Debug_Flag_Present := True;
406
407 Linker_Options.Increment_Last;
408 Linker_Options.Table (Linker_Options.Last) :=
409 new String'(Arg);
410
411 Binder_Options.Increment_Last;
412 Binder_Options.Table (Binder_Options.Last) :=
413 Linker_Options.Table (Linker_Options.Last);
414
415 elsif Arg'Length >= 3 and then Arg (2) = 'M' then
416 declare
417 Switches : String_List_Access;
418
419 begin
420 Convert (Map_File, Arg (3 .. Arg'Last), Switches);
421
422 if Switches /= null then
423 for J in Switches'Range loop
424 Linker_Options.Increment_Last;
425 Linker_Options.Table (Linker_Options.Last) :=
426 Switches (J);
427 end loop;
428 end if;
429 end;
430
431 elsif Arg'Length = 2 then
432 case Arg (2) is
433 when 'b' =>
434 Linker_Options.Increment_Last;
435 Linker_Options.Table (Linker_Options.Last) :=
436 new String'(Arg);
437
438 Binder_Options.Increment_Last;
439 Binder_Options.Table (Binder_Options.Last) :=
440 Linker_Options.Table (Linker_Options.Last);
441
442 Next_Arg := Next_Arg + 1;
443
444 if Next_Arg > Argument_Count then
445 Exit_With_Error ("Missing argument for -b");
446 end if;
447
448 Get_Machine_Name : declare
449 Name_Arg : constant String_Access :=
450 new String'(Argument (Next_Arg));
451
452 begin
453 Linker_Options.Increment_Last;
454 Linker_Options.Table (Linker_Options.Last) :=
455 Name_Arg;
456
457 Binder_Options.Increment_Last;
458 Binder_Options.Table (Binder_Options.Last) :=
459 Name_Arg;
460
461 end Get_Machine_Name;
462
463 when 'f' =>
464 if Object_List_File_Supported then
465 Object_List_File_Required := True;
466 else
467 Exit_With_Error
468 ("Object list file not supported on this target");
469 end if;
470
471 when 'M' =>
472 Create_Map_File := True;
473
474 when 'n' =>
475 Compile_Bind_File := False;
476
477 when 'o' =>
478 Next_Arg := Next_Arg + 1;
479
480 if Next_Arg > Argument_Count then
481 Exit_With_Error ("Missing argument for -o");
482 end if;
483
484 Output_File_Name :=
485 new String'(Executable_Name
486 (Argument (Next_Arg),
487 Only_If_No_Suffix => True));
488
489 when 'P' =>
490 Opt.CodePeer_Mode := True;
491
492 when 'R' =>
493 Opt.Run_Path_Option := False;
494
495 when 'v' =>
496
497 -- Support "double" verbose mode. Second -v
498 -- gets sent to the linker and binder phases.
499
500 if Verbose_Mode then
501 Very_Verbose_Mode := True;
502
503 Linker_Options.Increment_Last;
504 Linker_Options.Table (Linker_Options.Last) :=
505 new String'(Arg);
506
507 Binder_Options.Increment_Last;
508 Binder_Options.Table (Binder_Options.Last) :=
509 Linker_Options.Table (Linker_Options.Last);
510
511 else
512 Verbose_Mode := True;
513
514 end if;
515
516 when others =>
517 Linker_Options.Increment_Last;
518 Linker_Options.Table (Linker_Options.Last) :=
519 new String'(Arg);
520
521 end case;
522
523 elsif Arg (2) = 'B' then
524 Linker_Options.Increment_Last;
525 Linker_Options.Table (Linker_Options.Last) :=
526 new String'(Arg);
527
528 Binder_Options.Increment_Last;
529 Binder_Options.Table (Binder_Options.Last) :=
530 Linker_Options.Table (Linker_Options.Last);
531
532 elsif Arg'Length >= 7 and then Arg (1 .. 7) = "--LINK=" then
533 if Arg'Length = 7 then
534 Exit_With_Error ("Missing argument for --LINK=");
535 end if;
536
537 Linker_Path :=
538 System.OS_Lib.Locate_Exec_On_Path (Arg (8 .. Arg'Last));
539
540 if Linker_Path = null then
541 Exit_With_Error
542 ("Could not locate linker: " & Arg (8 .. Arg'Last));
543 end if;
544
545 elsif Arg'Length > 6 and then Arg (1 .. 6) = "--GCC=" then
546 declare
547 Program_Args : constant Argument_List_Access :=
548 Argument_String_To_List
549 (Arg (7 .. Arg'Last));
550
551 begin
552 if Program_Args.all (1).all /= Gcc.all then
553 Gcc := new String'(Program_Args.all (1).all);
554 Standard_Gcc := False;
555 end if;
556
557 -- Set appropriate flags for switches passed
558
559 for J in 2 .. Program_Args.all'Last loop
560 declare
561 Arg : constant String := Program_Args.all (J).all;
562 AF : constant Integer := Arg'First;
563
564 begin
565 if Arg'Length /= 0 and then Arg (AF) = '-' then
566 if Arg (AF + 1) = 'g'
567 and then (Arg'Length = 2
568 or else Arg (AF + 2) in '0' .. '3'
569 or else Arg (AF + 2 .. Arg'Last) = "coff")
570 then
571 Debug_Flag_Present := True;
572 end if;
573 end if;
574
575 -- Add directory to source search dirs so that
576 -- Get_Target_Parameters can find system.ads
577
578 if Arg (AF .. AF + 1) = "-I"
579 and then Arg'Length > 2
580 then
581 Add_Src_Search_Dir (Arg (AF + 2 .. Arg'Last));
582 end if;
583
584 -- Pass to gcc for compiling binder generated file
585 -- No use passing libraries, it will just generate
586 -- a warning
587
588 if not (Arg (AF .. AF + 1) = "-l"
589 or else Arg (AF .. AF + 1) = "-L")
590 then
591 Binder_Options.Increment_Last;
592 Binder_Options.Table (Binder_Options.Last) :=
593 new String'(Arg);
594 end if;
595
596 -- Pass to gcc for linking program
597
598 Gcc_Linker_Options.Increment_Last;
599 Gcc_Linker_Options.Table
600 (Gcc_Linker_Options.Last) := new String'(Arg);
601 end;
602 end loop;
603 end;
604
605 -- Send all multi-character switches not recognized as
606 -- a special case by gnatlink to the linker/loader stage.
607
608 else
609 Linker_Options.Increment_Last;
610 Linker_Options.Table (Linker_Options.Last) :=
611 new String'(Arg);
612 end if;
613
614 -- Here if argument is a file name rather than a switch
615
616 else
617 -- If explicit ali file, capture it
618
619 if Arg'Length > 4
620 and then Arg (Arg'Last - 3 .. Arg'Last) = ".ali"
621 then
622 if Ali_File_Name = null then
623 Ali_File_Name := new String'(Arg);
624 else
625 Exit_With_Error ("cannot handle more than one ALI file");
626 end if;
627
628 -- If target object file, record object file
629
630 elsif Arg'Length > Get_Target_Object_Suffix.all'Length
631 and then Arg
632 (Arg'Last -
633 Get_Target_Object_Suffix.all'Length + 1 .. Arg'Last)
634 = Get_Target_Object_Suffix.all
635 then
636 Linker_Objects.Increment_Last;
637 Linker_Objects.Table (Linker_Objects.Last) :=
638 new String'(Arg);
639
640 -- If host object file, record object file e.g. accept foo.o
641 -- as well as foo.obj on VMS target.
642
643 elsif Arg'Length > Get_Object_Suffix.all'Length
644 and then Arg
645 (Arg'Last - Get_Object_Suffix.all'Length + 1 .. Arg'Last)
646 = Get_Object_Suffix.all
647 then
648 Linker_Objects.Increment_Last;
649 Linker_Objects.Table (Linker_Objects.Last) :=
650 new String'(Arg);
651
652 -- If corresponding ali file exists, capture it
653
654 elsif Ali_File_Name = null
655 and then Is_Regular_File (Arg & ".ali")
656 then
657 Ali_File_Name := new String'(Arg & ".ali");
658
659 -- Otherwise assume this is a linker options entry, but
660 -- see below for interesting adjustment to this assumption.
661
662 else
663 Linker_Options.Increment_Last;
664 Linker_Options.Table (Linker_Options.Last) :=
665 new String'(Arg);
666 end if;
667 end if;
668 end Process_One_Arg;
669
670 Next_Arg := Next_Arg + 1;
671 end loop;
672
673 -- Compile the bind file with warnings suppressed, because
674 -- otherwise the with of the main program may cause junk warnings.
675
676 Binder_Options.Increment_Last;
677 Binder_Options.Table (Binder_Options.Last) := new String'("-gnatws");
678
679 -- If we did not get an ali file at all, and we had at least one
680 -- linker option, then assume that was the intended ali file after
681 -- all, so that we get a nicer message later on.
682
683 if Ali_File_Name = null
684 and then Linker_Options.Last >= Linker_Options.First
685 then
686 Ali_File_Name :=
687 new String'(Linker_Options.Table (Linker_Options.First).all
688 & ".ali");
689 end if;
690 end Process_Args;
691
692 -------------------------
693 -- Process_Binder_File --
694 -------------------------
695
696 procedure Process_Binder_File (Name : String) is
697 Fd : FILEs;
698 -- Binder file's descriptor
699
700 Link_Bytes : Integer := 0;
701 -- Projected number of bytes for the linker command line
702
703 Link_Max : Integer;
704 pragma Import (C, Link_Max, "__gnat_link_max");
705 -- Maximum number of bytes on the command line supported by the OS
706 -- linker. Passed this limit the response file mechanism must be used
707 -- if supported.
708
709 Next_Line : String (1 .. 1000);
710 -- Current line value
711
712 Nlast : Integer;
713 Nfirst : Integer;
714 -- Current line slice (the slice does not contain line terminator)
715
716 Last : Integer;
717 -- Current line last character for shared libraries (without version)
718
719 Objs_Begin : Integer := 0;
720 -- First object file index in Linker_Objects table
721
722 Objs_End : Integer := 0;
723 -- Last object file index in Linker_Objects table
724
725 Status : int;
726 pragma Warnings (Off, Status);
727 -- Used for various Interfaces.C_Streams calls
728
729 Closing_Status : Boolean;
730 pragma Warnings (Off, Closing_Status);
731 -- For call to Close
732
733 GNAT_Static : Boolean := False;
734 -- Save state of -static option
735
736 GNAT_Shared : Boolean := False;
737 -- Save state of -shared option
738
739 Xlinker_Was_Previous : Boolean := False;
740 -- Indicate that "-Xlinker" was the option preceding the current
741 -- option. If True, then the current option is never suppressed.
742
743 -- Rollback data
744
745 -- These data items are used to store current binder file context.
746 -- The context is composed of the file descriptor position and the
747 -- current line together with the slice indexes (first and last
748 -- position) for this line. The rollback data are used by the
749 -- Store_File_Context and Rollback_File_Context routines below.
750 -- The file context mechanism interact only with the Get_Next_Line
751 -- call. For example:
752
753 -- Store_File_Context;
754 -- Get_Next_Line;
755 -- Rollback_File_Context;
756 -- Get_Next_Line;
757
758 -- Both Get_Next_Line calls above will read the exact same data from
759 -- the file. In other words, Next_Line, Nfirst and Nlast variables
760 -- will be set with the exact same values.
761
762 RB_File_Pos : long; -- File position
763 RB_Next_Line : String (1 .. 1000); -- Current line content
764 RB_Nlast : Integer; -- Slice last index
765 RB_Nfirst : Integer; -- Slice first index
766
767 Run_Path_Option_Ptr : Interfaces.C.Strings.chars_ptr;
768 pragma Import (C, Run_Path_Option_Ptr, "__gnat_run_path_option");
769 -- Pointer to string representing the native linker option which
770 -- specifies the path where the dynamic loader should find shared
771 -- libraries. Equal to null string if this system doesn't support it.
772
773 Libgcc_Subdir_Ptr : Interfaces.C.Strings.chars_ptr;
774 pragma Import (C, Libgcc_Subdir_Ptr, "__gnat_default_libgcc_subdir");
775 -- Pointer to string indicating the installation subdirectory where
776 -- a default shared libgcc might be found.
777
778 Object_Library_Ext_Ptr : Interfaces.C.Strings.chars_ptr;
779 pragma Import
780 (C, Object_Library_Ext_Ptr, "__gnat_object_library_extension");
781 -- Pointer to string specifying the default extension for
782 -- object libraries, e.g. Unix uses ".a", VMS uses ".olb".
783
784 Separate_Run_Path_Options : Boolean;
785 for Separate_Run_Path_Options'Size use Character'Size;
786 pragma Import
787 (C, Separate_Run_Path_Options, "__gnat_separate_run_path_options");
788 -- Whether separate rpath options should be emitted for each directory
789
790 procedure Get_Next_Line;
791 -- Read the next line from the binder file without the line
792 -- terminator.
793
794 function Index (S, Pattern : String) return Natural;
795 -- Return the last occurrence of Pattern in S, or 0 if none
796
797 function Is_Option_Present (Opt : String) return Boolean;
798 -- Return true if the option Opt is already present in
799 -- Linker_Options table.
800
801 procedure Store_File_Context;
802 -- Store current file context, Fd position and current line data.
803 -- The file context is stored into the rollback data above (RB_*).
804 -- Store_File_Context can be called at any time, only the last call
805 -- will be used (i.e. this routine overwrites the file context).
806
807 procedure Rollback_File_Context;
808 -- Restore file context from rollback data. This routine must be called
809 -- after Store_File_Context. The binder file context will be restored
810 -- with the data stored by the last Store_File_Context call.
811
812 procedure Write_RF (S : String);
813 -- Write a string to the response file and check if it was successful.
814 -- Fail the program if it was not successful (disk full).
815
816 -------------------
817 -- Get_Next_Line --
818 -------------------
819
820 procedure Get_Next_Line is
821 Fchars : chars;
822
823 begin
824 Fchars := fgets (Next_Line'Address, Next_Line'Length, Fd);
825
826 if Fchars = System.Null_Address then
827 Exit_With_Error ("Error reading binder output");
828 end if;
829
830 Nfirst := Next_Line'First;
831 Nlast := Nfirst;
832 while Nlast <= Next_Line'Last
833 and then Next_Line (Nlast) /= ASCII.LF
834 and then Next_Line (Nlast) /= ASCII.CR
835 loop
836 Nlast := Nlast + 1;
837 end loop;
838
839 Nlast := Nlast - 1;
840 end Get_Next_Line;
841
842 -----------
843 -- Index --
844 -----------
845
846 function Index (S, Pattern : String) return Natural is
847 Len : constant Natural := Pattern'Length;
848
849 begin
850 for J in reverse S'First .. S'Last - Len + 1 loop
851 if Pattern = S (J .. J + Len - 1) then
852 return J;
853 end if;
854 end loop;
855
856 return 0;
857 end Index;
858
859 -----------------------
860 -- Is_Option_Present --
861 -----------------------
862
863 function Is_Option_Present (Opt : String) return Boolean is
864 begin
865 for I in 1 .. Linker_Options.Last loop
866
867 if Linker_Options.Table (I).all = Opt then
868 return True;
869 end if;
870
871 end loop;
872
873 return False;
874 end Is_Option_Present;
875
876 ---------------------------
877 -- Rollback_File_Context --
878 ---------------------------
879
880 procedure Rollback_File_Context is
881 begin
882 Next_Line := RB_Next_Line;
883 Nfirst := RB_Nfirst;
884 Nlast := RB_Nlast;
885 Status := fseek (Fd, RB_File_Pos, Interfaces.C_Streams.SEEK_SET);
886
887 if Status = -1 then
888 Exit_With_Error ("Error setting file position");
889 end if;
890 end Rollback_File_Context;
891
892 ------------------------
893 -- Store_File_Context --
894 ------------------------
895
896 procedure Store_File_Context is
897 use type System.CRTL.long;
898
899 begin
900 RB_Next_Line := Next_Line;
901 RB_Nfirst := Nfirst;
902 RB_Nlast := Nlast;
903 RB_File_Pos := ftell (Fd);
904
905 if RB_File_Pos = -1 then
906 Exit_With_Error ("Error getting file position");
907 end if;
908 end Store_File_Context;
909
910 --------------
911 -- Write_RF --
912 --------------
913
914 procedure Write_RF (S : String) is
915 Success : Boolean := True;
916 Back_Slash : constant Character := '\';
917
918 begin
919 -- If a GNU response file is used, space and backslash need to be
920 -- escaped because they are interpreted as a string separator and
921 -- an escape character respectively by the underlying mechanism.
922 -- On the other hand, quote and double-quote are not escaped since
923 -- they are interpreted as string delimiters on both sides.
924
925 if Using_GNU_response_file then
926 for J in S'Range loop
927 if S (J) = ' ' or else S (J) = '\' then
928 if Write (Tname_FD, Back_Slash'Address, 1) /= 1 then
929 Success := False;
930 end if;
931 end if;
932
933 if Write (Tname_FD, S (J)'Address, 1) /= 1 then
934 Success := False;
935 end if;
936 end loop;
937
938 else
939 if Write (Tname_FD, S'Address, S'Length) /= S'Length then
940 Success := False;
941 end if;
942 end if;
943
944 if Write (Tname_FD, ASCII.LF'Address, 1) /= 1 then
945 Success := False;
946 end if;
947
948 if not Success then
949 Exit_With_Error ("Error generating response file: disk full");
950 end if;
951 end Write_RF;
952
953 -- Start of processing for Process_Binder_File
954
955 begin
956 Fd := fopen (Name'Address, Read_Mode'Address);
957
958 if Fd = NULL_Stream then
959 Exit_With_Error ("Failed to open binder output");
960 end if;
961
962 -- Skip up to the Begin Info line
963
964 loop
965 Get_Next_Line;
966 exit when Next_Line (Nfirst .. Nlast) = Begin_Info;
967 end loop;
968
969 loop
970 Get_Next_Line;
971
972 -- Go to end when end line is reached (this will happen in
973 -- High_Integrity_Mode where no -L switches are generated)
974
975 exit when Next_Line (Nfirst .. Nlast) = End_Info;
976
977 Next_Line (Nfirst .. Nlast - 8) := Next_Line (Nfirst + 8 .. Nlast);
978 Nlast := Nlast - 8;
979
980 -- Go to next section when switches are reached
981
982 exit when Next_Line (1) = '-';
983
984 -- Otherwise we have another object file to collect
985
986 Linker_Objects.Increment_Last;
987
988 -- Mark the positions of first and last object files in case they
989 -- need to be placed with a named file on systems having linker
990 -- line limitations.
991
992 if Objs_Begin = 0 then
993 Objs_Begin := Linker_Objects.Last;
994 end if;
995
996 Linker_Objects.Table (Linker_Objects.Last) :=
997 new String'(Next_Line (Nfirst .. Nlast));
998
999 -- Nlast - Nfirst + 1, for the size, plus one for the space between
1000 -- each arguments.
1001
1002 Link_Bytes := Link_Bytes + Nlast - Nfirst + 2;
1003 end loop;
1004
1005 Objs_End := Linker_Objects.Last;
1006
1007 -- Continue to compute the Link_Bytes, the linker options are part of
1008 -- command line length.
1009
1010 Store_File_Context;
1011
1012 while Next_Line (Nfirst .. Nlast) /= End_Info loop
1013 Link_Bytes := Link_Bytes + Nlast - Nfirst + 2;
1014 Get_Next_Line;
1015 end loop;
1016
1017 Rollback_File_Context;
1018
1019 -- On systems that have limitations on handling very long linker lines
1020 -- we make use of the system linker option which takes a list of object
1021 -- file names from a file instead of the command line itself. What we do
1022 -- is to replace the list of object files by the special linker option
1023 -- which then reads the object file list from a file instead. The option
1024 -- to read from a file instead of the command line is only triggered if
1025 -- a conservative threshold is passed.
1026
1027 if Object_List_File_Required
1028 or else (Object_List_File_Supported
1029 and then Link_Bytes > Link_Max)
1030 then
1031 -- Create a temporary file containing the Ada user object files
1032 -- needed by the link. This list is taken from the bind file and is
1033 -- output one object per line for maximal compatibility with linkers
1034 -- supporting this option.
1035
1036 Create_Temp_File (Tname_FD, Tname);
1037
1038 -- ??? File descriptor should be checked to not be Invalid_FD.
1039 -- ??? Status of Write and Close operations should be checked, and
1040 -- failure should occur if a status is wrong.
1041
1042 for J in Objs_Begin .. Objs_End loop
1043 Write_RF (Linker_Objects.Table (J).all);
1044
1045 Response_File_Objects.Increment_Last;
1046 Response_File_Objects.Table (Response_File_Objects.Last) :=
1047 Linker_Objects.Table (J);
1048 end loop;
1049
1050 Close (Tname_FD, Closing_Status);
1051
1052 -- Add the special objects list file option together with the name
1053 -- of the temporary file (removing the null character) to the objects
1054 -- file table.
1055
1056 Linker_Objects.Table (Objs_Begin) :=
1057 new String'(Object_File_Option &
1058 Tname (Tname'First .. Tname'Last - 1));
1059
1060 -- The slots containing these object file names are then removed
1061 -- from the objects table so they do not appear in the link. They are
1062 -- removed by moving up the linker options and non-Ada object files
1063 -- appearing after the Ada object list in the table.
1064
1065 declare
1066 N : Integer;
1067
1068 begin
1069 N := Objs_End - Objs_Begin + 1;
1070
1071 for J in Objs_End + 1 .. Linker_Objects.Last loop
1072 Linker_Objects.Table (J - N + 1) := Linker_Objects.Table (J);
1073 end loop;
1074
1075 Linker_Objects.Set_Last (Linker_Objects.Last - N + 1);
1076 end;
1077 end if;
1078
1079 -- Process switches and options
1080
1081 if Next_Line (Nfirst .. Nlast) /= End_Info then
1082 Xlinker_Was_Previous := False;
1083
1084 loop
1085 if Xlinker_Was_Previous
1086 or else Next_Line (Nfirst .. Nlast) = "-Xlinker"
1087 then
1088 Linker_Options.Increment_Last;
1089 Linker_Options.Table (Linker_Options.Last) :=
1090 new String'(Next_Line (Nfirst .. Nlast));
1091
1092 elsif Next_Line (Nfirst .. Nlast) = "-static" then
1093 GNAT_Static := True;
1094
1095 elsif Next_Line (Nfirst .. Nlast) = "-shared" then
1096 GNAT_Shared := True;
1097
1098 -- Add binder options only if not already set on the command line.
1099 -- This rule is a way to control the linker options order.
1100
1101 -- The following test needs comments, why is it VMS specific.
1102 -- The above comment looks out of date ???
1103
1104 elsif not
1105 (OpenVMS_On_Target
1106 and then Is_Option_Present (Next_Line (Nfirst .. Nlast)))
1107 then
1108 if Nlast > Nfirst + 2 and then
1109 Next_Line (Nfirst .. Nfirst + 1) = "-L"
1110 then
1111 -- Construct a library search path for use later to locate
1112 -- static gnatlib libraries.
1113
1114 if Libpath.Last > 1 then
1115 Libpath.Increment_Last;
1116 Libpath.Table (Libpath.Last) := Path_Separator;
1117 end if;
1118
1119 for I in Nfirst + 2 .. Nlast loop
1120 Libpath.Increment_Last;
1121 Libpath.Table (Libpath.Last) := Next_Line (I);
1122 end loop;
1123
1124 Linker_Options.Increment_Last;
1125
1126 Linker_Options.Table (Linker_Options.Last) :=
1127 new String'(Next_Line (Nfirst .. Nlast));
1128
1129 elsif Next_Line (Nfirst .. Nlast) = "-ldecgnat"
1130 or else Next_Line (Nfirst .. Nlast) = "-lgnarl"
1131 or else Next_Line (Nfirst .. Nlast) = "-lgnat"
1132 or else
1133 Next_Line
1134 (1 .. Natural'Min (Nlast, 8 + Library_Version'Length)) =
1135 Shared_Lib ("gnarl")
1136 or else
1137 Next_Line
1138 (1 .. Natural'Min (Nlast, 7 + Library_Version'Length)) =
1139 Shared_Lib ("gnat")
1140 then
1141 -- If it is a shared library, remove the library version.
1142 -- We will be looking for the static version of the library
1143 -- as it is in the same directory as the shared version.
1144
1145 if Next_Line (Nlast - Library_Version'Length + 1 .. Nlast) =
1146 Library_Version
1147 then
1148 -- Set Last to point to last character before the
1149 -- library version.
1150
1151 Last := Nlast - Library_Version'Length - 1;
1152 else
1153 Last := Nlast;
1154 end if;
1155
1156 -- Given a Gnat standard library, search the library path to
1157 -- find the library location.
1158
1159 -- Shouldn't we abstract a proc here, we are getting awfully
1160 -- heavily nested ???
1161
1162 declare
1163 File_Path : String_Access;
1164
1165 Object_Lib_Extension : constant String :=
1166 Value (Object_Library_Ext_Ptr);
1167
1168 File_Name : constant String := "lib" &
1169 Next_Line (Nfirst + 2 .. Last) & Object_Lib_Extension;
1170
1171 Run_Path_Opt : constant String :=
1172 Value (Run_Path_Option_Ptr);
1173
1174 GCC_Index : Natural;
1175 Run_Path_Opt_Index : Natural := 0;
1176
1177 begin
1178 File_Path :=
1179 Locate_Regular_File (File_Name,
1180 String (Libpath.Table (1 .. Libpath.Last)));
1181
1182 if File_Path /= null then
1183 if GNAT_Static then
1184
1185 -- If static gnatlib found, explicitly specify to
1186 -- overcome possible linker default usage of shared
1187 -- version.
1188
1189 Linker_Options.Increment_Last;
1190
1191 Linker_Options.Table (Linker_Options.Last) :=
1192 new String'(File_Path.all);
1193
1194 elsif GNAT_Shared then
1195 if Opt.Run_Path_Option then
1196
1197 -- If shared gnatlib desired, add appropriate
1198 -- system specific switch so that it can be
1199 -- located at runtime.
1200
1201 if Run_Path_Opt'Length /= 0 then
1202
1203 -- Output the system specific linker command
1204 -- that allows the image activator to find
1205 -- the shared library at runtime. Also add
1206 -- path to find libgcc_s.so, if relevant.
1207
1208 declare
1209 Path : String (1 .. File_Path'Length + 15);
1210
1211 Path_Last : constant Natural :=
1212 File_Path'Length;
1213
1214 begin
1215 Path (1 .. File_Path'Length) :=
1216 File_Path.all;
1217
1218 -- To find the location of the shared version
1219 -- of libgcc, we look for "gcc-lib" in the
1220 -- path of the library. However, this
1221 -- subdirectory is no longer present in
1222 -- recent versions of GCC. So, we look for
1223 -- the last subdirectory "lib" in the path.
1224
1225 GCC_Index :=
1226 Index (Path (1 .. Path_Last), "gcc-lib");
1227
1228 if GCC_Index /= 0 then
1229
1230 -- The shared version of libgcc is
1231 -- located in the parent directory.
1232
1233 GCC_Index := GCC_Index - 1;
1234
1235 else
1236 GCC_Index :=
1237 Index
1238 (Path (1 .. Path_Last),
1239 "/lib/");
1240
1241 if GCC_Index = 0 then
1242 GCC_Index :=
1243 Index (Path (1 .. Path_Last),
1244 Directory_Separator &
1245 "lib" &
1246 Directory_Separator);
1247 end if;
1248
1249 -- If we have found a "lib" subdir in
1250 -- the path to libgnat, the possible
1251 -- shared libgcc of interest by default
1252 -- is in libgcc_subdir at the same
1253 -- level.
1254
1255 if GCC_Index /= 0 then
1256 declare
1257 Subdir : constant String :=
1258 Value (Libgcc_Subdir_Ptr);
1259 begin
1260 Path
1261 (GCC_Index + 1 ..
1262 GCC_Index + Subdir'Length) :=
1263 Subdir;
1264 GCC_Index :=
1265 GCC_Index + Subdir'Length;
1266 end;
1267 end if;
1268 end if;
1269
1270 -- Look for an eventual run_path_option in
1271 -- the linker switches.
1272
1273 if Separate_Run_Path_Options then
1274 Linker_Options.Increment_Last;
1275 Linker_Options.Table
1276 (Linker_Options.Last) :=
1277 new String'
1278 (Run_Path_Opt
1279 & File_Path
1280 (1 .. File_Path'Length
1281 - File_Name'Length));
1282
1283 if GCC_Index /= 0 then
1284 Linker_Options.Increment_Last;
1285 Linker_Options.Table
1286 (Linker_Options.Last) :=
1287 new String'
1288 (Run_Path_Opt
1289 & Path (1 .. GCC_Index));
1290 end if;
1291
1292 else
1293 for J in reverse
1294 1 .. Linker_Options.Last
1295 loop
1296 if Linker_Options.Table (J) /= null
1297 and then
1298 Linker_Options.Table (J)'Length
1299 > Run_Path_Opt'Length
1300 and then
1301 Linker_Options.Table (J)
1302 (1 .. Run_Path_Opt'Length) =
1303 Run_Path_Opt
1304 then
1305 -- We have found an already
1306 -- specified run_path_option:
1307 -- we will add to this
1308 -- switch, because only one
1309 -- run_path_option should be
1310 -- specified.
1311
1312 Run_Path_Opt_Index := J;
1313 exit;
1314 end if;
1315 end loop;
1316
1317 -- If there is no run_path_option, we
1318 -- need to add one.
1319
1320 if Run_Path_Opt_Index = 0 then
1321 Linker_Options.Increment_Last;
1322 end if;
1323
1324 if GCC_Index = 0 then
1325 if Run_Path_Opt_Index = 0 then
1326 Linker_Options.Table
1327 (Linker_Options.Last) :=
1328 new String'
1329 (Run_Path_Opt
1330 & File_Path
1331 (1 .. File_Path'Length
1332 - File_Name'Length));
1333
1334 else
1335 Linker_Options.Table
1336 (Run_Path_Opt_Index) :=
1337 new String'
1338 (Linker_Options.Table
1339 (Run_Path_Opt_Index).all
1340 & Path_Separator
1341 & File_Path
1342 (1 .. File_Path'Length
1343 - File_Name'Length));
1344 end if;
1345
1346 else
1347 if Run_Path_Opt_Index = 0 then
1348 Linker_Options.Table
1349 (Linker_Options.Last) :=
1350 new String'
1351 (Run_Path_Opt
1352 & File_Path
1353 (1 .. File_Path'Length
1354 - File_Name'Length)
1355 & Path_Separator
1356 & Path (1 .. GCC_Index));
1357
1358 else
1359 Linker_Options.Table
1360 (Run_Path_Opt_Index) :=
1361 new String'
1362 (Linker_Options.Table
1363 (Run_Path_Opt_Index).all
1364 & Path_Separator
1365 & File_Path
1366 (1 .. File_Path'Length
1367 - File_Name'Length)
1368 & Path_Separator
1369 & Path (1 .. GCC_Index));
1370 end if;
1371 end if;
1372 end if;
1373 end;
1374 end if;
1375 end if;
1376
1377 -- Then we add the appropriate -l switch
1378
1379 Linker_Options.Increment_Last;
1380 Linker_Options.Table (Linker_Options.Last) :=
1381 new String'(Next_Line (Nfirst .. Nlast));
1382 end if;
1383
1384 else
1385 -- If gnatlib library not found, then add it anyway in
1386 -- case some other mechanism may find it.
1387
1388 Linker_Options.Increment_Last;
1389 Linker_Options.Table (Linker_Options.Last) :=
1390 new String'(Next_Line (Nfirst .. Nlast));
1391 end if;
1392 end;
1393 else
1394 Linker_Options.Increment_Last;
1395 Linker_Options.Table (Linker_Options.Last) :=
1396 new String'(Next_Line (Nfirst .. Nlast));
1397 end if;
1398 end if;
1399
1400 Xlinker_Was_Previous := Next_Line (Nfirst .. Nlast) = "-Xlinker";
1401
1402 Get_Next_Line;
1403 exit when Next_Line (Nfirst .. Nlast) = End_Info;
1404
1405 Next_Line (Nfirst .. Nlast - 8) := Next_Line (Nfirst + 8 .. Nlast);
1406 Nlast := Nlast - 8;
1407 end loop;
1408 end if;
1409
1410 -- If -shared was specified, invoke gcc with -shared-libgcc
1411
1412 if GNAT_Shared then
1413 Linker_Options.Increment_Last;
1414 Linker_Options.Table (Linker_Options.Last) := Shared_Libgcc;
1415 end if;
1416
1417 Status := fclose (Fd);
1418 end Process_Binder_File;
1419
1420 --------------
1421 -- To_Lower --
1422 --------------
1423
1424 function To_Lower (A : Character) return Character is
1425 A_Val : constant Natural := Character'Pos (A);
1426
1427 begin
1428 if A in 'A' .. 'Z'
1429 or else A_Val in 16#C0# .. 16#D6#
1430 or else A_Val in 16#D8# .. 16#DE#
1431 then
1432 return Character'Val (A_Val + 16#20#);
1433 else
1434 return A;
1435 end if;
1436 end To_Lower;
1437
1438 procedure To_Lower (A : in out String) is
1439 begin
1440 for J in A'Range loop
1441 A (J) := To_Lower (A (J));
1442 end loop;
1443 end To_Lower;
1444
1445 -----------
1446 -- Usage --
1447 -----------
1448
1449 procedure Usage is
1450 begin
1451 Write_Str ("Usage: ");
1452 Write_Str (Base_Command_Name.all);
1453 Write_Str (" switches mainprog.ali [non-Ada-objects] [linker-options]");
1454 Write_Eol;
1455 Write_Eol;
1456 Write_Line (" mainprog.ali the ALI file of the main program");
1457 Write_Eol;
1458 Write_Eol;
1459 Display_Usage_Version_And_Help;
1460 Write_Line (" -f Force object file list to be generated");
1461 Write_Line (" -g Compile binder source file with debug information");
1462 Write_Line (" -n Do not compile the binder source file");
1463 Write_Line (" -P Process files for use by CodePeer");
1464 Write_Line (" -R Do not use a run_path_option");
1465 Write_Line (" -v Verbose mode");
1466 Write_Line (" -v -v Very verbose mode");
1467 Write_Eol;
1468 Write_Line (" -o nam Use 'nam' as the name of the executable");
1469 Write_Line (" -b target Compile the binder source to run on target");
1470 Write_Line (" -Bdir Load compiler executables from dir");
1471
1472 if Is_Supported (Map_File) then
1473 Write_Line (" -Mmap Create map file map");
1474 Write_Line (" -M Create map file mainprog.map");
1475 end if;
1476
1477 Write_Line (" --GCC=comp Use comp as the compiler");
1478 Write_Line (" --LINK=nam Use 'nam' for the linking rather than 'gcc'");
1479 Write_Eol;
1480 Write_Line (" [non-Ada-objects] list of non Ada object files");
1481 Write_Line (" [linker-options] other options for the linker");
1482 end Usage;
1483
1484 ------------------
1485 -- Write_Header --
1486 ------------------
1487
1488 procedure Write_Header is
1489 begin
1490 if Verbose_Mode then
1491 Write_Eol;
1492 Display_Version ("GNATLINK", "1995");
1493 end if;
1494 end Write_Header;
1495
1496 -----------------
1497 -- Write_Usage --
1498 -----------------
1499
1500 procedure Write_Usage is
1501 begin
1502 Write_Header;
1503 Usage;
1504 end Write_Usage;
1505
1506 -- Start of processing for Gnatlink
1507
1508 begin
1509 -- Add the directory where gnatlink is invoked in front of the path, if
1510 -- gnatlink is invoked with directory information. Only do this if the
1511 -- platform is not VMS, where the notion of path does not really exist.
1512
1513 if not Hostparm.OpenVMS then
1514 declare
1515 Command : constant String := Command_Name;
1516
1517 begin
1518 for Index in reverse Command'Range loop
1519 if Command (Index) = Directory_Separator then
1520 declare
1521 Absolute_Dir : constant String :=
1522 Normalize_Pathname
1523 (Command (Command'First .. Index));
1524
1525 PATH : constant String :=
1526 Absolute_Dir &
1527 Path_Separator &
1528 Getenv ("PATH").all;
1529
1530 begin
1531 Setenv ("PATH", PATH);
1532 end;
1533
1534 exit;
1535 end if;
1536 end loop;
1537 end;
1538 end if;
1539
1540 Base_Command_Name := new String'(Base_Name (Command_Name));
1541
1542 -- Fold to lower case "GNATLINK" on VMS to be consistent with output
1543 -- from other GNAT utilities.
1544
1545 if Hostparm.OpenVMS then
1546 To_Lower (Base_Command_Name.all);
1547 end if;
1548
1549 Process_Args;
1550
1551 if Argument_Count = 0
1552 or else (Verbose_Mode and then Argument_Count = 1)
1553 then
1554 Write_Usage;
1555 Exit_Program (E_Fatal);
1556 end if;
1557
1558 -- Initialize packages to be used
1559
1560 Csets.Initialize;
1561 Snames.Initialize;
1562
1563 -- We always compile with -c
1564
1565 Binder_Options_From_ALI.Increment_Last;
1566 Binder_Options_From_ALI.Table (Binder_Options_From_ALI.Last) :=
1567 new String'("-c");
1568
1569 if Ali_File_Name = null then
1570 Exit_With_Error ("no ali file given for link");
1571 end if;
1572
1573 if not Is_Regular_File (Ali_File_Name.all) then
1574 Exit_With_Error (Ali_File_Name.all & " not found");
1575 end if;
1576
1577 -- Read the ALI file of the main subprogram if the binder generated file
1578 -- needs to be compiled and no --GCC= switch has been specified. Fetch the
1579 -- back end switches from this ALI file and use these switches to compile
1580 -- the binder generated file
1581
1582 if Compile_Bind_File and then Standard_Gcc then
1583 Initialize_ALI;
1584 Name_Len := Ali_File_Name'Length;
1585 Name_Buffer (1 .. Name_Len) := Ali_File_Name.all;
1586
1587 declare
1588 use Types;
1589 F : constant File_Name_Type := Name_Find;
1590 T : Text_Buffer_Ptr;
1591 A : ALI_Id;
1592
1593 begin
1594 -- Load the ALI file
1595
1596 T := Read_Library_Info (F, True);
1597
1598 -- Read it. Note that we ignore errors, since we only want very
1599 -- limited information from the ali file, and likely a slightly
1600 -- wrong version will be just fine, though in normal operation
1601 -- we don't expect this to happen.
1602
1603 A := Scan_ALI
1604 (F,
1605 T,
1606 Ignore_ED => False,
1607 Err => False,
1608 Ignore_Errors => True);
1609
1610 if A /= No_ALI_Id then
1611 for
1612 Index in Units.Table (ALIs.Table (A).First_Unit).First_Arg ..
1613 Units.Table (ALIs.Table (A).First_Unit).Last_Arg
1614 loop
1615 -- Do not compile with the front end switches. However, --RTS
1616 -- is to be dealt with specially because it needs to be passed
1617 -- if the binder-generated file is in Ada and may also be used
1618 -- to drive the linker.
1619
1620 declare
1621 Arg : String_Ptr renames Args.Table (Index);
1622 begin
1623 if not Is_Front_End_Switch (Arg.all) then
1624 Binder_Options_From_ALI.Increment_Last;
1625 Binder_Options_From_ALI.Table
1626 (Binder_Options_From_ALI.Last) := String_Access (Arg);
1627
1628 elsif Arg'Length > 5
1629 and then Arg (Arg'First + 2 .. Arg'First + 5) = "RTS="
1630 then
1631 Binder_Options_From_ALI.Increment_Last;
1632 Binder_Options_From_ALI.Table
1633 (Binder_Options_From_ALI.Last) := String_Access (Arg);
1634
1635 -- Set the RTS_*_Path_Name variables, so that
1636 -- the correct directories will be set when
1637 -- Osint.Add_Default_Search_Dirs will be called later.
1638
1639 Opt.RTS_Src_Path_Name :=
1640 Get_RTS_Search_Dir
1641 (Arg (Arg'First + 6 .. Arg'Last), Include);
1642
1643 Opt.RTS_Lib_Path_Name :=
1644 Get_RTS_Search_Dir
1645 (Arg (Arg'First + 6 .. Arg'Last), Objects);
1646
1647 -- GNAT doesn't support the GCC multilib mechanism.
1648 -- This means that, when a multilib switch is used
1649 -- to request a particular compilation mode, the
1650 -- corresponding runtime switch (--RTS) must also be
1651 -- specified. The long-term goal is to fully support the
1652 -- multilib mechanism; however, in the meantime, it is
1653 -- convenient to eliminate the redundancy by keying the
1654 -- compilation mode on a single switch, namely --RTS.
1655
1656 -- Pass -mrtp to the linker if --RTS=rtp was passed
1657
1658 if Arg'Length > 8
1659 and then
1660 (Arg (Arg'First + 6 .. Arg'First + 8) = "rtp"
1661 or else Arg (Arg'Last - 2 .. Arg'Last) = "rtp")
1662 then
1663 Linker_Options.Increment_Last;
1664 Linker_Options.Table (Linker_Options.Last) :=
1665 new String'("-mrtp");
1666 end if;
1667 end if;
1668 end;
1669 end loop;
1670 end if;
1671 end;
1672 end if;
1673
1674 -- Get target parameters
1675
1676 Osint.Add_Default_Search_Dirs;
1677 Targparm.Get_Target_Parameters;
1678
1679 if VM_Target /= No_VM then
1680 case VM_Target is
1681 when JVM_Target => Gcc := new String'("jvm-gnatcompile");
1682 when CLI_Target => Gcc := new String'("dotnet-gnatcompile");
1683 when No_VM => raise Program_Error;
1684 end case;
1685 end if;
1686
1687 -- Compile the bind file with the following switches:
1688
1689 -- -gnatA stops reading gnat.adc, since we don't know what
1690 -- pragmas would work, and we do not need it anyway.
1691
1692 -- -gnatWb allows brackets coding for wide characters
1693
1694 -- -gnatiw allows wide characters in identifiers. This is needed
1695 -- because bindgen uses brackets encoding for all upper
1696 -- half and wide characters in identifier names.
1697
1698 -- In addition, in CodePeer mode compile with -x adascil -gnatcC
1699
1700 Binder_Options_From_ALI.Increment_Last;
1701 Binder_Options_From_ALI.Table (Binder_Options_From_ALI.Last) :=
1702 new String'("-gnatA");
1703 Binder_Options_From_ALI.Increment_Last;
1704 Binder_Options_From_ALI.Table (Binder_Options_From_ALI.Last) :=
1705 new String'("-gnatWb");
1706 Binder_Options_From_ALI.Increment_Last;
1707 Binder_Options_From_ALI.Table (Binder_Options_From_ALI.Last) :=
1708 new String'("-gnatiw");
1709
1710 if Opt.CodePeer_Mode then
1711 Binder_Options_From_ALI.Increment_Last;
1712 Binder_Options_From_ALI.Table (Binder_Options_From_ALI.Last) :=
1713 new String'("-x");
1714 Binder_Options_From_ALI.Increment_Last;
1715 Binder_Options_From_ALI.Table (Binder_Options_From_ALI.Last) :=
1716 new String'("adascil");
1717 Binder_Options_From_ALI.Increment_Last;
1718 Binder_Options_From_ALI.Table (Binder_Options_From_ALI.Last) :=
1719 new String'("-gnatcC");
1720 end if;
1721
1722 -- Locate all the necessary programs and verify required files are present
1723
1724 Gcc_Path := System.OS_Lib.Locate_Exec_On_Path (Gcc.all);
1725
1726 if Gcc_Path = null then
1727 Exit_With_Error ("Couldn't locate " & Gcc.all);
1728 end if;
1729
1730 if Linker_Path = null then
1731 if VM_Target = CLI_Target then
1732 Linker_Path := System.OS_Lib.Locate_Exec_On_Path ("dotnet-ld");
1733
1734 if Linker_Path = null then
1735 Exit_With_Error ("Couldn't locate dotnet-ld");
1736 end if;
1737
1738 elsif RTX_RTSS_Kernel_Module_On_Target then
1739
1740 -- Use Microsoft linker for RTSS modules
1741
1742 Linker_Path := System.OS_Lib.Locate_Exec_On_Path ("link");
1743
1744 if Linker_Path = null then
1745 Exit_With_Error ("Couldn't locate link");
1746 end if;
1747
1748 else
1749 Linker_Path := Gcc_Path;
1750 end if;
1751 end if;
1752
1753 Write_Header;
1754
1755 -- If no output name specified, then use the base name of .ali file name
1756
1757 if Output_File_Name = null then
1758 Output_File_Name :=
1759 new String'(Base_Name (Ali_File_Name.all)
1760 & Get_Target_Debuggable_Suffix.all);
1761 end if;
1762
1763 if RTX_RTSS_Kernel_Module_On_Target then
1764 Linker_Options.Increment_Last;
1765 Linker_Options.Table (Linker_Options.Last) :=
1766 new String'("/OUT:" & Output_File_Name.all);
1767
1768 else
1769 Linker_Options.Increment_Last;
1770 Linker_Options.Table (Linker_Options.Last) := new String'("-o");
1771
1772 Linker_Options.Increment_Last;
1773 Linker_Options.Table (Linker_Options.Last) :=
1774 new String'(Output_File_Name.all);
1775 end if;
1776
1777 Check_Existing_Executable (Output_File_Name.all);
1778
1779 -- Warn if main program is called "test", as that may be a built-in command
1780 -- on Unix. On non-Unix systems executables have a suffix, so the warning
1781 -- will not appear. However, do not warn in the case of a cross compiler.
1782
1783 -- Assume this is a cross tool if the executable name is not gnatlink.
1784 -- Note that the executable name is also gnatlink on windows, but in that
1785 -- case the output file name will be test.exe rather than test.
1786
1787 if Base_Command_Name.all = "gnatlink"
1788 and then Output_File_Name.all = "test"
1789 then
1790 Error_Msg ("warning: executable name """ & Output_File_Name.all
1791 & """ may conflict with shell command");
1792 end if;
1793
1794 -- Special warnings for worrisome file names on windows
1795
1796 -- Windows-7 will not allow an executable file whose name contains any
1797 -- of the substrings "install", "setup", or "update" to load without
1798 -- special administration privileges. This rather incredible behavior
1799 -- is Microsoft's idea of a useful security precaution.
1800
1801 Bad_File_Names_On_Windows : declare
1802 FN : String := Output_File_Name.all;
1803
1804 procedure Check_File_Name (S : String);
1805 -- Warn if file name has the substring S
1806
1807 procedure Check_File_Name (S : String) is
1808 begin
1809 for J in 1 .. FN'Length - (S'Length - 1) loop
1810 if FN (J .. J + (S'Length - 1)) = S then
1811 Error_Msg
1812 ("warning: possible problem with executable name """
1813 & Output_File_Name.all & '"');
1814 Error_Msg
1815 ("file name contains substring """ & S & '"');
1816 Error_Msg
1817 ("admin privileges may be required on Windows 7 "
1818 & "to load this file");
1819 end if;
1820 end loop;
1821 end Check_File_Name;
1822
1823 -- Start of processing for Bad_File_Names_On_Windows
1824
1825 begin
1826 for J in FN'Range loop
1827 FN (J) := Csets.Fold_Lower (FN (J));
1828 end loop;
1829
1830 -- For now we detect windows by an output executable name ending with
1831 -- the suffix .exe (excluding VMS which might use that same name).
1832
1833 if FN'Length > 5
1834 and then FN (FN'Last - 3 .. FN'Last) = ".exe"
1835 and then not OpenVMS_On_Target
1836 then
1837 Check_File_Name ("install");
1838 Check_File_Name ("setup");
1839 Check_File_Name ("update");
1840 end if;
1841 end Bad_File_Names_On_Windows;
1842
1843 -- If -M switch was specified, add the switches to create the map file
1844
1845 if Create_Map_File then
1846 declare
1847 Map_Name : constant String := Base_Name (Ali_File_Name.all) & ".map";
1848 Switches : String_List_Access;
1849
1850 begin
1851 Convert (Map_File, Map_Name, Switches);
1852
1853 if Switches /= null then
1854 for J in Switches'Range loop
1855 Linker_Options.Increment_Last;
1856 Linker_Options.Table (Linker_Options.Last) := Switches (J);
1857 end loop;
1858 end if;
1859 end;
1860 end if;
1861
1862 -- Perform consistency checks
1863
1864 -- Transform the .ali file name into the binder output file name
1865
1866 Make_Binder_File_Names : declare
1867 Fname : constant String := Base_Name (Ali_File_Name.all);
1868 Fname_Len : Integer := Fname'Length;
1869
1870 function Get_Maximum_File_Name_Length return Integer;
1871 pragma Import (C, Get_Maximum_File_Name_Length,
1872 "__gnat_get_maximum_file_name_length");
1873
1874 Maximum_File_Name_Length : constant Integer :=
1875 Get_Maximum_File_Name_Length;
1876
1877 Bind_File_Prefix : Types.String_Ptr;
1878 -- Contains prefix used for bind files
1879
1880 begin
1881 -- Set prefix
1882
1883 if OpenVMS_On_Target then
1884 Bind_File_Prefix := new String'("b__");
1885 else
1886 Bind_File_Prefix := new String'("b~");
1887 end if;
1888
1889 -- If the length of the binder file becomes too long due to
1890 -- the addition of the "b?" prefix, then truncate it.
1891
1892 if Maximum_File_Name_Length > 0 then
1893 while Fname_Len >
1894 Maximum_File_Name_Length - Bind_File_Prefix.all'Length
1895 loop
1896 Fname_Len := Fname_Len - 1;
1897 end loop;
1898 end if;
1899
1900 declare
1901 Fnam : constant String :=
1902 Bind_File_Prefix.all &
1903 Fname (Fname'First .. Fname'First + Fname_Len - 1);
1904
1905 begin
1906 Binder_Spec_Src_File := new String'(Fnam & ".ads");
1907 Binder_Body_Src_File := new String'(Fnam & ".adb");
1908 Binder_Ali_File := new String'(Fnam & ".ali");
1909
1910 Binder_Obj_File := new String'(Fnam & Get_Target_Object_Suffix.all);
1911 end;
1912
1913 if Fname_Len /= Fname'Length then
1914 Binder_Options.Increment_Last;
1915 Binder_Options.Table (Binder_Options.Last) := new String'("-o");
1916 Binder_Options.Increment_Last;
1917 Binder_Options.Table (Binder_Options.Last) := Binder_Obj_File;
1918 end if;
1919 end Make_Binder_File_Names;
1920
1921 Process_Binder_File (Binder_Body_Src_File.all & ASCII.NUL);
1922
1923 -- Compile the binder file. This is fast, so we always do it, unless
1924 -- specifically told not to by the -n switch
1925
1926 if Compile_Bind_File then
1927 Bind_Step : declare
1928 Success : Boolean;
1929
1930 Args : Argument_List
1931 (1 .. Binder_Options_From_ALI.Last + Binder_Options.Last + 1);
1932
1933 begin
1934 for J in 1 .. Binder_Options_From_ALI.Last loop
1935 Args (J) := Binder_Options_From_ALI.Table (J);
1936 end loop;
1937
1938 for J in 1 .. Binder_Options.Last loop
1939 Args (Binder_Options_From_ALI.Last + J) :=
1940 Binder_Options.Table (J);
1941 end loop;
1942
1943 -- Use the full path of the binder generated source, so that it is
1944 -- guaranteed that the debugger will find this source, even with
1945 -- STABS.
1946
1947 Args (Args'Last) :=
1948 new String'(Normalize_Pathname (Binder_Body_Src_File.all));
1949
1950 if Verbose_Mode then
1951 Write_Str (Base_Name (Gcc_Path.all));
1952
1953 for J in Args'Range loop
1954 Write_Str (" ");
1955 Write_Str (Args (J).all);
1956 end loop;
1957
1958 Write_Eol;
1959 end if;
1960
1961 System.OS_Lib.Spawn (Gcc_Path.all, Args, Success);
1962
1963 if not Success then
1964 Exit_Program (E_Fatal);
1965 end if;
1966 end Bind_Step;
1967 end if;
1968
1969 -- In CodePeer mode, there's nothing left to do after the binder file has
1970 -- been compiled.
1971
1972 if Opt.CodePeer_Mode then
1973 return;
1974 end if;
1975
1976 -- Now, actually link the program
1977
1978 -- Skip this step for now on JVM since the Java interpreter will do
1979 -- the actual link at run time. We might consider packing all class files
1980 -- in a .zip file during this step.
1981
1982 if VM_Target /= JVM_Target then
1983 Link_Step : declare
1984 Num_Args : Natural :=
1985 (Linker_Options.Last - Linker_Options.First + 1) +
1986 (Gcc_Linker_Options.Last - Gcc_Linker_Options.First + 1) +
1987 (Linker_Objects.Last - Linker_Objects.First + 1);
1988 Stack_Op : Boolean := False;
1989 IDENT_Op : Boolean := False;
1990
1991 begin
1992 if AAMP_On_Target then
1993
1994 -- Remove extraneous flags not relevant for AAMP
1995
1996 for J in reverse Linker_Options.First .. Linker_Options.Last loop
1997 if Linker_Options.Table (J)'Length = 0
1998 or else Linker_Options.Table (J) (1 .. 3) = "-Wl"
1999 or else Linker_Options.Table (J) (1 .. 3) = "-sh"
2000 or else Linker_Options.Table (J) (1 .. 2) = "-O"
2001 or else Linker_Options.Table (J) (1 .. 2) = "-g"
2002 then
2003 Linker_Options.Table (J .. Linker_Options.Last - 1) :=
2004 Linker_Options.Table (J + 1 .. Linker_Options.Last);
2005 Linker_Options.Decrement_Last;
2006 Num_Args := Num_Args - 1;
2007 end if;
2008 end loop;
2009
2010 elsif RTX_RTSS_Kernel_Module_On_Target then
2011
2012 -- Remove irrelevant flags for Microsoft linker, adapt some others
2013
2014 for J in reverse Linker_Options.First .. Linker_Options.Last loop
2015
2016 -- Remove flags that are not accepted
2017
2018 if Linker_Options.Table (J)'Length = 0
2019 or else Linker_Options.Table (J) (1 .. 2) = "-l"
2020 or else Linker_Options.Table (J) (1 .. 3) = "-Wl"
2021 or else Linker_Options.Table (J) (1 .. 3) = "-sh"
2022 or else Linker_Options.Table (J) (1 .. 2) = "-O"
2023 or else Linker_Options.Table (J) (1 .. 8) = "-Xlinker"
2024 or else Linker_Options.Table (J) (1 .. 9) = "-mthreads"
2025 then
2026 Linker_Options.Table (J .. Linker_Options.Last - 1) :=
2027 Linker_Options.Table (J + 1 .. Linker_Options.Last);
2028 Linker_Options.Decrement_Last;
2029 Num_Args := Num_Args - 1;
2030
2031 -- Replace "-L" by its counterpart "/LIBPATH:" and UNIX "/" by
2032 -- Windows "\".
2033
2034 elsif Linker_Options.Table (J) (1 .. 2) = "-L" then
2035 declare
2036 Libpath_Option : constant String_Access := new String'
2037 ("/LIBPATH:" &
2038 Linker_Options.Table
2039 (J) (3 .. Linker_Options.Table (J).all'Last));
2040 begin
2041 for Index in 10 .. Libpath_Option'Last loop
2042 if Libpath_Option (Index) = '/' then
2043 Libpath_Option (Index) := '\';
2044 end if;
2045 end loop;
2046
2047 Linker_Options.Table (J) := Libpath_Option;
2048 end;
2049
2050 -- Replace "-g" by "/DEBUG"
2051
2052 elsif Linker_Options.Table (J) (1 .. 2) = "-g" then
2053 Linker_Options.Table (J) := new String'("/DEBUG");
2054
2055 -- Replace "-o" by "/OUT:"
2056
2057 elsif Linker_Options.Table (J) (1 .. 2) = "-o" then
2058 Linker_Options.Table (J + 1) := new String'
2059 ("/OUT:" & Linker_Options.Table (J + 1).all);
2060
2061 Linker_Options.Table (J .. Linker_Options.Last - 1) :=
2062 Linker_Options.Table (J + 1 .. Linker_Options.Last);
2063 Linker_Options.Decrement_Last;
2064 Num_Args := Num_Args - 1;
2065
2066 -- Replace "--stack=" by "/STACK:"
2067
2068 elsif Linker_Options.Table (J) (1 .. 8) = "--stack=" then
2069 Linker_Options.Table (J) := new String'
2070 ("/STACK:" &
2071 Linker_Options.Table (J)
2072 (9 .. Linker_Options.Table (J).all'Last));
2073
2074 -- Replace "-v" by its counterpart "/VERBOSE"
2075
2076 elsif Linker_Options.Table (J) (1 .. 2) = "-v" then
2077 Linker_Options.Table (J) := new String'("/VERBOSE");
2078 end if;
2079 end loop;
2080
2081 -- Add some required flags to create RTSS modules
2082
2083 declare
2084 Flags_For_Linker : constant array (1 .. 17) of String_Access :=
2085 (new String'("/NODEFAULTLIB"),
2086 new String'("/INCREMENTAL:NO"),
2087 new String'("/NOLOGO"),
2088 new String'("/DRIVER"),
2089 new String'("/ALIGN:0x20"),
2090 new String'("/SUBSYSTEM:NATIVE"),
2091 new String'("/ENTRY:_RtapiProcessEntryCRT@8"),
2092 new String'("/RELEASE"),
2093 new String'("startupCRT.obj"),
2094 new String'("rtxlibcmt.lib"),
2095 new String'("oldnames.lib"),
2096 new String'("rtapi_rtss.lib"),
2097 new String'("Rtx_Rtss.lib"),
2098 new String'("libkernel32.a"),
2099 new String'("libws2_32.a"),
2100 new String'("libmswsock.a"),
2101 new String'("libadvapi32.a"));
2102 -- These flags need to be passed to Microsoft linker. They
2103 -- come from the RTX documentation.
2104
2105 Gcc_Lib_Path : constant String_Access := new String'
2106 ("/LIBPATH:" & Include_Dir_Default_Prefix & "\..\");
2107 -- Place to look for gcc related libraries, such as libgcc
2108
2109 begin
2110 -- Replace UNIX "/" by Windows "\" in the path
2111
2112 for Index in 10 .. Gcc_Lib_Path.all'Last loop
2113 if Gcc_Lib_Path (Index) = '/' then
2114 Gcc_Lib_Path (Index) := '\';
2115 end if;
2116 end loop;
2117
2118 Linker_Options.Increment_Last;
2119 Linker_Options.Table (Linker_Options.Last) := Gcc_Lib_Path;
2120 Num_Args := Num_Args + 1;
2121
2122 for Index in Flags_For_Linker'Range loop
2123 Linker_Options.Increment_Last;
2124 Linker_Options.Table (Linker_Options.Last) :=
2125 Flags_For_Linker (Index);
2126 Num_Args := Num_Args + 1;
2127 end loop;
2128 end;
2129 end if;
2130
2131 -- Remove duplicate stack size setting from the Linker_Options table.
2132 -- The stack setting option "-Xlinker --stack=R,C" can be found
2133 -- in one line when set by a pragma Linker_Options or in two lines
2134 -- ("-Xlinker" then "--stack=R,C") when set on the command line. We
2135 -- also check for the "-Wl,--stack=R" style option.
2136
2137 -- We must remove the second stack setting option instance because
2138 -- the one on the command line will always be the first one. And any
2139 -- subsequent stack setting option will overwrite the previous one.
2140 -- This is done especially for GNAT/NT where we set the stack size
2141 -- for tasking programs by a pragma in the NT specific tasking
2142 -- package System.Task_Primitives.Operations.
2143
2144 -- Note: This is not a FOR loop that runs from Linker_Options.First
2145 -- to Linker_Options.Last, since operations within the loop can
2146 -- modify the length of the table.
2147
2148 Clean_Link_Option_Set : declare
2149 J : Natural;
2150 Shared_Libgcc_Seen : Boolean := False;
2151
2152 begin
2153 J := Linker_Options.First;
2154 while J <= Linker_Options.Last loop
2155 if Linker_Options.Table (J).all = "-Xlinker"
2156 and then J < Linker_Options.Last
2157 and then Linker_Options.Table (J + 1)'Length > 8
2158 and then Linker_Options.Table (J + 1) (1 .. 8) = "--stack="
2159 then
2160 if Stack_Op then
2161 Linker_Options.Table (J .. Linker_Options.Last - 2) :=
2162 Linker_Options.Table (J + 2 .. Linker_Options.Last);
2163 Linker_Options.Decrement_Last;
2164 Linker_Options.Decrement_Last;
2165 Num_Args := Num_Args - 2;
2166
2167 else
2168 Stack_Op := True;
2169 end if;
2170 end if;
2171
2172 -- Remove duplicate -shared-libgcc switch
2173
2174 if Linker_Options.Table (J).all = Shared_Libgcc_String then
2175 if Shared_Libgcc_Seen then
2176 Linker_Options.Table (J .. Linker_Options.Last - 1) :=
2177 Linker_Options.Table (J + 1 .. Linker_Options.Last);
2178 Linker_Options.Decrement_Last;
2179 Num_Args := Num_Args - 1;
2180
2181 else
2182 Shared_Libgcc_Seen := True;
2183 end if;
2184 end if;
2185
2186 -- Here we just check for a canonical form that matches the
2187 -- pragma Linker_Options set in the NT runtime.
2188
2189 if (Linker_Options.Table (J)'Length > 17
2190 and then Linker_Options.Table (J) (1 .. 17) =
2191 "-Xlinker --stack=")
2192 or else
2193 (Linker_Options.Table (J)'Length > 12
2194 and then Linker_Options.Table (J) (1 .. 12) =
2195 "-Wl,--stack=")
2196 then
2197 if Stack_Op then
2198 Linker_Options.Table (J .. Linker_Options.Last - 1) :=
2199 Linker_Options.Table (J + 1 .. Linker_Options.Last);
2200 Linker_Options.Decrement_Last;
2201 Num_Args := Num_Args - 1;
2202
2203 else
2204 Stack_Op := True;
2205 end if;
2206 end if;
2207
2208 -- Remove duplicate IDENTIFICATION directives (VMS)
2209
2210 if Linker_Options.Table (J)'Length > 29
2211 and then Linker_Options.Table (J) (1 .. 30) =
2212 "--for-linker=--identification="
2213 then
2214 if IDENT_Op then
2215 Linker_Options.Table (J .. Linker_Options.Last - 1) :=
2216 Linker_Options.Table (J + 1 .. Linker_Options.Last);
2217 Linker_Options.Decrement_Last;
2218 Num_Args := Num_Args - 1;
2219
2220 else
2221 IDENT_Op := True;
2222 end if;
2223 end if;
2224
2225 J := J + 1;
2226 end loop;
2227
2228 if Linker_Path = Gcc_Path and then VM_Target = No_VM then
2229
2230 -- For systems where the default is to link statically with
2231 -- libgcc, if gcc is not called with -shared-libgcc, call it
2232 -- with -static-libgcc, as there are some platforms where one
2233 -- of these two switches is compulsory to link.
2234
2235 if Shared_Libgcc_Default = 'T'
2236 and then not Shared_Libgcc_Seen
2237 then
2238 Linker_Options.Increment_Last;
2239 Linker_Options.Table (Linker_Options.Last) := Static_Libgcc;
2240 Num_Args := Num_Args + 1;
2241 end if;
2242
2243 elsif RTX_RTSS_Kernel_Module_On_Target then
2244
2245 -- Force the use of the static libgcc for RTSS modules
2246
2247 Linker_Options.Increment_Last;
2248 Linker_Options.Table (Linker_Options.Last) :=
2249 new String'("libgcc.a");
2250 Num_Args := Num_Args + 1;
2251 end if;
2252
2253 end Clean_Link_Option_Set;
2254
2255 -- Prepare arguments for call to linker
2256
2257 Call_Linker : declare
2258 Success : Boolean;
2259 Args : Argument_List (1 .. Num_Args + 1);
2260 Index : Integer := Args'First;
2261
2262 begin
2263 Args (Index) := Binder_Obj_File;
2264
2265 -- Add the object files and any -largs libraries
2266
2267 for J in Linker_Objects.First .. Linker_Objects.Last loop
2268 Index := Index + 1;
2269 Args (Index) := Linker_Objects.Table (J);
2270 end loop;
2271
2272 -- Add the linker options from the binder file
2273
2274 for J in Linker_Options.First .. Linker_Options.Last loop
2275 Index := Index + 1;
2276 Args (Index) := Linker_Options.Table (J);
2277 end loop;
2278
2279 -- Finally add the libraries from the --GCC= switch
2280
2281 for J in Gcc_Linker_Options.First .. Gcc_Linker_Options.Last loop
2282 Index := Index + 1;
2283 Args (Index) := Gcc_Linker_Options.Table (J);
2284 end loop;
2285
2286 if Verbose_Mode then
2287 Write_Str (Linker_Path.all);
2288
2289 for J in Args'Range loop
2290 Write_Str (" ");
2291 Write_Str (Args (J).all);
2292 end loop;
2293
2294 Write_Eol;
2295
2296 -- If we are on very verbose mode (-v -v) and a response file
2297 -- is used we display its content.
2298
2299 if Very_Verbose_Mode and then Tname_FD /= Invalid_FD then
2300 Write_Eol;
2301 Write_Str ("Response file (" &
2302 Tname (Tname'First .. Tname'Last - 1) &
2303 ") content : ");
2304 Write_Eol;
2305
2306 for J in
2307 Response_File_Objects.First .. Response_File_Objects.Last
2308 loop
2309 Write_Str (Response_File_Objects.Table (J).all);
2310 Write_Eol;
2311 end loop;
2312
2313 Write_Eol;
2314 end if;
2315 end if;
2316
2317 System.OS_Lib.Spawn (Linker_Path.all, Args, Success);
2318
2319 if Success then
2320
2321 -- Delete the temporary file used in conjunction with linking
2322 -- if one was created. See Process_Bind_File for details.
2323
2324 if Tname_FD /= Invalid_FD then
2325 Delete (Tname);
2326 end if;
2327
2328 else
2329 Error_Msg ("error when calling " & Linker_Path.all);
2330 Exit_Program (E_Fatal);
2331 end if;
2332 end Call_Linker;
2333 end Link_Step;
2334 end if;
2335
2336 -- Only keep the binder output file and it's associated object
2337 -- file if compiling with the -g option. These files are only
2338 -- useful if debugging.
2339
2340 if not Debug_Flag_Present then
2341 Delete (Binder_Ali_File.all & ASCII.NUL);
2342 Delete (Binder_Spec_Src_File.all & ASCII.NUL);
2343 Delete (Binder_Body_Src_File.all & ASCII.NUL);
2344
2345 if VM_Target = No_VM then
2346 Delete (Binder_Obj_File.all & ASCII.NUL);
2347 end if;
2348 end if;
2349
2350 Exit_Program (E_Success);
2351
2352 exception
2353 when X : others =>
2354 Write_Line (Exception_Information (X));
2355 Exit_With_Error ("INTERNAL ERROR. Please report");
2356 end Gnatlink;
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