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Imported GNU Classpath 0.90
[official-gcc.git] / gcc / ada / gnatlink.adb
bloba2e63823846623f55ea6a6bdbce7051c732c6449
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) 1996-2006, 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 2, 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 COPYING. If not, write --
19 -- to the Free Software Foundation, 51 Franklin Street, Fifth Floor, --
20 -- Boston, MA 02110-1301, USA. --
21 -- --
22 -- GNAT was originally developed by the GNAT team at New York University. --
23 -- Extensive contributions were provided by Ada Core Technologies Inc. --
24 -- --
25 ------------------------------------------------------------------------------
26
27 -- Gnatlink usage: please consult the gnat documentation
28
29 with ALI; use ALI;
30 with Csets;
31 with Gnatvsn; use Gnatvsn;
32 with Hostparm;
33 with Indepsw; use Indepsw;
34 with Namet; use Namet;
35 with Opt;
36 with Osint; use Osint;
37 with Output; use Output;
38 with Snames;
39 with Switch; use Switch;
40 with System; use System;
41 with Table;
42 with Targparm; use Targparm;
43 with Types;
44
45 with Ada.Command_Line; use Ada.Command_Line;
46 with Ada.Exceptions; use Ada.Exceptions;
47 with GNAT.OS_Lib; use GNAT.OS_Lib;
48 with Interfaces.C_Streams; use Interfaces.C_Streams;
49 with Interfaces.C.Strings; use Interfaces.C.Strings;
50 with System.CRTL;
51
52 procedure Gnatlink is
53 pragma Ident (Gnatvsn.Gnat_Static_Version_String);
54
55 Shared_Libgcc_String : constant String := "-shared-libgcc";
56 Shared_Libgcc : constant String_Access :=
57 new String'(Shared_Libgcc_String);
58 -- Used to invoke gcc when the binder is invoked with -shared
59
60 package Gcc_Linker_Options is new Table.Table (
61 Table_Component_Type => String_Access,
62 Table_Index_Type => Integer,
63 Table_Low_Bound => 1,
64 Table_Initial => 20,
65 Table_Increment => 100,
66 Table_Name => "Gnatlink.Gcc_Linker_Options");
67 -- Comments needed ???
68
69 package Libpath is new Table.Table (
70 Table_Component_Type => Character,
71 Table_Index_Type => Integer,
72 Table_Low_Bound => 1,
73 Table_Initial => 4096,
74 Table_Increment => 2,
75 Table_Name => "Gnatlink.Libpath");
76 -- Comments needed ???
77
78 package Linker_Options is new Table.Table (
79 Table_Component_Type => String_Access,
80 Table_Index_Type => Integer,
81 Table_Low_Bound => 1,
82 Table_Initial => 20,
83 Table_Increment => 100,
84 Table_Name => "Gnatlink.Linker_Options");
85 -- Comments needed ???
86
87 package Linker_Objects is new Table.Table (
88 Table_Component_Type => String_Access,
89 Table_Index_Type => Integer,
90 Table_Low_Bound => 1,
91 Table_Initial => 20,
92 Table_Increment => 100,
93 Table_Name => "Gnatlink.Linker_Objects");
94 -- This table collects the objects file to be passed to the linker. In the
95 -- case where the linker command line is too long then programs objects
96 -- are put on the Response_File_Objects table. Note that the binder object
97 -- file and the user's objects remain in this table. This is very
98 -- important because on the GNU linker command line the -L switch is not
99 -- used to look for objects files but -L switch is used to look for
100 -- objects listed in the response file. This is not a problem with the
101 -- applications objects as they are specified with a fullname.
102
103 package Response_File_Objects is new Table.Table (
104 Table_Component_Type => String_Access,
105 Table_Index_Type => Integer,
106 Table_Low_Bound => 1,
107 Table_Initial => 20,
108 Table_Increment => 100,
109 Table_Name => "Gnatlink.Response_File_Objects");
110 -- This table collects the objects file that are to be put in the response
111 -- file. Only application objects are collected there (see details in
112 -- Linker_Objects table comments)
113
114 package Binder_Options_From_ALI is new Table.Table (
115 Table_Component_Type => String_Access,
116 Table_Index_Type => Integer,
117 Table_Low_Bound => 1, -- equals low bound of Argument_List for Spawn
118 Table_Initial => 20,
119 Table_Increment => 100,
120 Table_Name => "Gnatlink.Binder_Options_From_ALI");
121 -- This table collects the switches from the ALI file of the main
122 -- subprogram.
123
124 package Binder_Options is new Table.Table (
125 Table_Component_Type => String_Access,
126 Table_Index_Type => Integer,
127 Table_Low_Bound => 1, -- equals low bound of Argument_List for Spawn
128 Table_Initial => 20,
129 Table_Increment => 100,
130 Table_Name => "Gnatlink.Binder_Options");
131 -- This table collects the arguments to be passed to compile the binder
132 -- generated file.
133
134 Gcc : String_Access := Program_Name ("gcc");
135
136 Read_Mode : constant String := "r" & ASCII.Nul;
137
138 Begin_Info : String := "-- BEGIN Object file/option list";
139 End_Info : String := "-- END Object file/option list ";
140 -- Note: above lines are modified in C mode, see option processing
141
142 Gcc_Path : String_Access;
143 Linker_Path : String_Access;
144
145 Output_File_Name : String_Access;
146 Ali_File_Name : String_Access;
147 Binder_Spec_Src_File : String_Access;
148 Binder_Body_Src_File : String_Access;
149 Binder_Ali_File : String_Access;
150 Binder_Obj_File : String_Access;
151
152 Tname : Temp_File_Name;
153 Tname_FD : File_Descriptor := Invalid_FD;
154 -- Temporary file used by linker to pass list of object files on
155 -- certain systems with limitations on size of arguments.
156
157 Debug_Flag_Present : Boolean := False;
158 Verbose_Mode : Boolean := False;
159 Very_Verbose_Mode : Boolean := False;
160
161 Ada_Bind_File : Boolean := True;
162 -- Set to True if bind file is generated in Ada
163
164 Standard_Gcc : Boolean := True;
165
166 Compile_Bind_File : Boolean := True;
167 -- Set to False if bind file is not to be compiled
168
169 Create_Map_File : Boolean := False;
170 -- Set to True by switch -M. The map file name is derived from
171 -- the ALI file name (mainprog.ali => mainprog.map).
172
173 Object_List_File_Supported : Boolean;
174 pragma Import
175 (C, Object_List_File_Supported, "__gnat_objlist_file_supported");
176 -- Predicate indicating whether the linker has an option whereby the
177 -- names of object files can be passed to the linker in a file.
178
179 Object_List_File_Required : Boolean := False;
180 -- Set to True to force generation of a response file
181
182 function Base_Name (File_Name : String) return String;
183 -- Return just the file name part without the extension (if present)
184
185 procedure Delete (Name : String);
186 -- Wrapper to unlink as status is ignored by this application
187
188 procedure Error_Msg (Message : String);
189 -- Output the error or warning Message
190
191 procedure Exit_With_Error (Error : String);
192 -- Output Error and exit program with a fatal condition
193
194 procedure Process_Args;
195 -- Go through all the arguments and build option tables
196
197 procedure Process_Binder_File (Name : String);
198 -- Reads the binder file and extracts linker arguments
199
200 procedure Write_Header;
201 -- Show user the program name, version and copyright
202
203 procedure Write_Usage;
204 -- Show user the program options
205
206 ---------------
207 -- Base_Name --
208 ---------------
209
210 function Base_Name (File_Name : String) return String is
211 Findex1 : Natural;
212 Findex2 : Natural;
213
214 begin
215 Findex1 := File_Name'First;
216
217 -- The file might be specified by a full path name. However,
218 -- we want the path to be stripped away.
219
220 for J in reverse File_Name'Range loop
221 if Is_Directory_Separator (File_Name (J)) then
222 Findex1 := J + 1;
223 exit;
224 end if;
225 end loop;
226
227 Findex2 := File_Name'Last;
228 while Findex2 > Findex1
229 and then File_Name (Findex2) /= '.'
230 loop
231 Findex2 := Findex2 - 1;
232 end loop;
233
234 if Findex2 = Findex1 then
235 Findex2 := File_Name'Last + 1;
236 end if;
237
238 return File_Name (Findex1 .. Findex2 - 1);
239 end Base_Name;
240
241 ------------
242 -- Delete --
243 ------------
244
245 procedure Delete (Name : String) is
246 Status : int;
247 pragma Unreferenced (Status);
248 begin
249 Status := unlink (Name'Address);
250 -- Is it really right to ignore an error here ???
251 end Delete;
252
253 ---------------
254 -- Error_Msg --
255 ---------------
256
257 procedure Error_Msg (Message : String) is
258 begin
259 Write_Str (Base_Name (Command_Name));
260 Write_Str (": ");
261 Write_Str (Message);
262 Write_Eol;
263 end Error_Msg;
264
265 ---------------------
266 -- Exit_With_Error --
267 ---------------------
268
269 procedure Exit_With_Error (Error : String) is
270 begin
271 Error_Msg (Error);
272 Exit_Program (E_Fatal);
273 end Exit_With_Error;
274
275 ------------------
276 -- Process_Args --
277 ------------------
278
279 procedure Process_Args is
280 Next_Arg : Integer;
281 Skip_Next : Boolean := False;
282 -- Set to true if the next argument is to be added into the list of
283 -- linker's argument without parsing it.
284
285 begin
286 -- Loop through arguments of gnatlink command
287
288 Next_Arg := 1;
289 loop
290 exit when Next_Arg > Argument_Count;
291
292 Process_One_Arg : declare
293 Arg : constant String := Argument (Next_Arg);
294
295 begin
296 -- Case of argument which is a switch
297
298 -- We definitely need section by section comments here ???
299
300 if Skip_Next then
301
302 -- This argument must not be parsed, just add it to the
303 -- list of linker's options.
304
305 Skip_Next := False;
306
307 Linker_Options.Increment_Last;
308 Linker_Options.Table (Linker_Options.Last) :=
309 new String'(Arg);
310
311 elsif Arg'Length /= 0 and then Arg (1) = '-' then
312 if Arg'Length > 4 and then Arg (2 .. 5) = "gnat" then
313 Exit_With_Error
314 ("invalid switch: """ & Arg & """ (gnat not needed here)");
315 end if;
316
317 if Arg = "-Xlinker" then
318
319 -- Next argument should be sent directly to the linker.
320 -- We do not want to parse it here.
321
322 Skip_Next := True;
323
324 Linker_Options.Increment_Last;
325 Linker_Options.Table (Linker_Options.Last) :=
326 new String'(Arg);
327
328 elsif Arg (2) = 'g'
329 and then (Arg'Length < 5 or else Arg (2 .. 5) /= "gnat")
330 then
331 Debug_Flag_Present := True;
332
333 Linker_Options.Increment_Last;
334 Linker_Options.Table (Linker_Options.Last) :=
335 new String'(Arg);
336
337 Binder_Options.Increment_Last;
338 Binder_Options.Table (Binder_Options.Last) :=
339 Linker_Options.Table (Linker_Options.Last);
340
341 elsif Arg'Length >= 3 and then Arg (2) = 'M' then
342 declare
343 Switches : String_List_Access;
344
345 begin
346 Convert (Map_File, Arg (3 .. Arg'Last), Switches);
347
348 if Switches /= null then
349 for J in Switches'Range loop
350 Linker_Options.Increment_Last;
351 Linker_Options.Table (Linker_Options.Last) :=
352 Switches (J);
353 end loop;
354 end if;
355 end;
356
357 elsif Arg'Length = 2 then
358 case Arg (2) is
359 when 'A' =>
360 Ada_Bind_File := True;
361 Begin_Info := "-- BEGIN Object file/option list";
362 End_Info := "-- END Object file/option list ";
363
364 when 'b' =>
365 Linker_Options.Increment_Last;
366 Linker_Options.Table (Linker_Options.Last) :=
367 new String'(Arg);
368
369 Binder_Options.Increment_Last;
370 Binder_Options.Table (Binder_Options.Last) :=
371 Linker_Options.Table (Linker_Options.Last);
372
373 Next_Arg := Next_Arg + 1;
374
375 if Next_Arg > Argument_Count then
376 Exit_With_Error ("Missing argument for -b");
377 end if;
378
379 Get_Machine_Name : declare
380 Name_Arg : constant String_Access :=
381 new String'(Argument (Next_Arg));
382
383 begin
384 Linker_Options.Increment_Last;
385 Linker_Options.Table (Linker_Options.Last) :=
386 Name_Arg;
387
388 Binder_Options.Increment_Last;
389 Binder_Options.Table (Binder_Options.Last) :=
390 Name_Arg;
391
392 end Get_Machine_Name;
393
394 when 'C' =>
395 Ada_Bind_File := False;
396 Begin_Info := "/* BEGIN Object file/option list";
397 End_Info := " END Object file/option list */";
398
399 when 'f' =>
400 if Object_List_File_Supported then
401 Object_List_File_Required := True;
402 else
403 Exit_With_Error
404 ("Object list file not supported on this target");
405 end if;
406
407 when 'M' =>
408 Create_Map_File := True;
409
410 when 'n' =>
411 Compile_Bind_File := False;
412
413 when 'o' =>
414 Linker_Options.Increment_Last;
415 Linker_Options.Table (Linker_Options.Last) :=
416 new String'(Arg);
417
418 Next_Arg := Next_Arg + 1;
419
420 if Next_Arg > Argument_Count then
421 Exit_With_Error ("Missing argument for -o");
422 end if;
423
424 Output_File_Name := new String'(Argument (Next_Arg));
425
426 Linker_Options.Increment_Last;
427 Linker_Options.Table (Linker_Options.Last) :=
428 Output_File_Name;
429
430 when 'R' =>
431 Opt.Run_Path_Option := False;
432
433 when 'v' =>
434
435 -- Support "double" verbose mode. Second -v
436 -- gets sent to the linker and binder phases.
437
438 if Verbose_Mode then
439 Very_Verbose_Mode := True;
440
441 Linker_Options.Increment_Last;
442 Linker_Options.Table (Linker_Options.Last) :=
443 new String'(Arg);
444
445 Binder_Options.Increment_Last;
446 Binder_Options.Table (Binder_Options.Last) :=
447 Linker_Options.Table (Linker_Options.Last);
448
449 else
450 Verbose_Mode := True;
451
452 end if;
453
454 when others =>
455 Linker_Options.Increment_Last;
456 Linker_Options.Table (Linker_Options.Last) :=
457 new String'(Arg);
458
459 end case;
460
461 elsif Arg (2) = 'B' then
462 Linker_Options.Increment_Last;
463 Linker_Options.Table (Linker_Options.Last) :=
464 new String'(Arg);
465
466 Binder_Options.Increment_Last;
467 Binder_Options.Table (Binder_Options.Last) :=
468 Linker_Options.Table (Linker_Options.Last);
469
470 elsif Arg'Length >= 7 and then Arg (1 .. 7) = "--LINK=" then
471 if Arg'Length = 7 then
472 Exit_With_Error ("Missing argument for --LINK=");
473 end if;
474
475 Linker_Path :=
476 GNAT.OS_Lib.Locate_Exec_On_Path (Arg (8 .. Arg'Last));
477
478 if Linker_Path = null then
479 Exit_With_Error
480 ("Could not locate linker: " & Arg (8 .. Arg'Last));
481 end if;
482
483 elsif Arg'Length > 6 and then Arg (1 .. 6) = "--GCC=" then
484 declare
485 Program_Args : constant Argument_List_Access :=
486 Argument_String_To_List
487 (Arg (7 .. Arg'Last));
488
489 begin
490 Gcc := new String'(Program_Args.all (1).all);
491 Standard_Gcc := False;
492
493 -- Set appropriate flags for switches passed
494
495 for J in 2 .. Program_Args.all'Last loop
496 declare
497 Arg : constant String := Program_Args.all (J).all;
498 AF : constant Integer := Arg'First;
499
500 begin
501 if Arg'Length /= 0 and then Arg (AF) = '-' then
502 if Arg (AF + 1) = 'g'
503 and then (Arg'Length = 2
504 or else Arg (AF + 2) in '0' .. '3'
505 or else Arg (AF + 2 .. Arg'Last) = "coff")
506 then
507 Debug_Flag_Present := True;
508 end if;
509 end if;
510
511 -- Add directory to source search dirs so that
512 -- Get_Target_Parameters can find system.ads
513
514 if Arg (AF .. AF + 1) = "-I"
515 and then Arg'Length > 2
516 then
517 Add_Src_Search_Dir (Arg (AF + 2 .. Arg'Last));
518 end if;
519
520 -- Pass to gcc for compiling binder generated file
521 -- No use passing libraries, it will just generate
522 -- a warning
523
524 if not (Arg (AF .. AF + 1) = "-l"
525 or else Arg (AF .. AF + 1) = "-L")
526 then
527 Binder_Options.Increment_Last;
528 Binder_Options.Table (Binder_Options.Last) :=
529 new String'(Arg);
530 end if;
531
532 -- Pass to gcc for linking program
533
534 Gcc_Linker_Options.Increment_Last;
535 Gcc_Linker_Options.Table
536 (Gcc_Linker_Options.Last) := new String'(Arg);
537 end;
538 end loop;
539 end;
540
541 -- Send all multi-character switches not recognized as
542 -- a special case by gnatlink to the linker/loader stage.
543
544 else
545 Linker_Options.Increment_Last;
546 Linker_Options.Table (Linker_Options.Last) :=
547 new String'(Arg);
548 end if;
549
550 -- Here if argument is a file name rather than a switch
551
552 else
553 -- If explicit ali file, capture it
554
555 if Arg'Length > 4
556 and then Arg (Arg'Last - 3 .. Arg'Last) = ".ali"
557 then
558 if Ali_File_Name = null then
559 Ali_File_Name := new String'(Arg);
560 else
561 Exit_With_Error ("cannot handle more than one ALI file");
562 end if;
563
564 -- If target object file, record object file
565
566 elsif Arg'Length > Get_Target_Object_Suffix.all'Length
567 and then Arg
568 (Arg'Last -
569 Get_Target_Object_Suffix.all'Length + 1 .. Arg'Last)
570 = Get_Target_Object_Suffix.all
571 then
572 Linker_Objects.Increment_Last;
573 Linker_Objects.Table (Linker_Objects.Last) :=
574 new String'(Arg);
575
576 -- If host object file, record object file
577 -- e.g. accept foo.o as well as foo.obj on VMS target
578
579 elsif Arg'Length > Get_Object_Suffix.all'Length
580 and then Arg
581 (Arg'Last - Get_Object_Suffix.all'Length + 1 .. Arg'Last)
582 = Get_Object_Suffix.all
583 then
584 Linker_Objects.Increment_Last;
585 Linker_Objects.Table (Linker_Objects.Last) :=
586 new String'(Arg);
587
588 -- If corresponding ali file exists, capture it
589
590 elsif Ali_File_Name = null
591 and then Is_Regular_File (Arg & ".ali")
592 then
593 Ali_File_Name := new String'(Arg & ".ali");
594
595 -- Otherwise assume this is a linker options entry, but
596 -- see below for interesting adjustment to this assumption.
597
598 else
599 Linker_Options.Increment_Last;
600 Linker_Options.Table (Linker_Options.Last) :=
601 new String'(Arg);
602 end if;
603 end if;
604 end Process_One_Arg;
605
606 Next_Arg := Next_Arg + 1;
607 end loop;
608
609 -- If Ada bind file, then compile it with warnings suppressed, because
610 -- otherwise the with of the main program may cause junk warnings.
611
612 if Ada_Bind_File then
613 Binder_Options.Increment_Last;
614 Binder_Options.Table (Binder_Options.Last) := new String'("-gnatws");
615 end if;
616
617 -- If we did not get an ali file at all, and we had at least one
618 -- linker option, then assume that was the intended ali file after
619 -- all, so that we get a nicer message later on.
620
621 if Ali_File_Name = null
622 and then Linker_Options.Last >= Linker_Options.First
623 then
624 Ali_File_Name :=
625 new String'(Linker_Options.Table (Linker_Options.First).all &
626 ".ali");
627 end if;
628 end Process_Args;
629
630 -------------------------
631 -- Process_Binder_File --
632 -------------------------
633
634 procedure Process_Binder_File (Name : String) is
635 Fd : FILEs;
636 -- Binder file's descriptor
637
638 Link_Bytes : Integer := 0;
639 -- Projected number of bytes for the linker command line
640
641 Link_Max : Integer;
642 pragma Import (C, Link_Max, "__gnat_link_max");
643 -- Maximum number of bytes on the command line supported by the OS
644 -- linker. Passed this limit the response file mechanism must be used
645 -- if supported.
646
647 Next_Line : String (1 .. 1000);
648 -- Current line value
649
650 Nlast : Integer;
651 Nfirst : Integer;
652 -- Current line slice (the slice does not contain line terminator)
653
654 Last : Integer;
655 -- Current line last character for shared libraries (without version)
656
657 Objs_Begin : Integer := 0;
658 -- First object file index in Linker_Objects table
659
660 Objs_End : Integer := 0;
661 -- Last object file index in Linker_Objects table
662
663 Status : int;
664 -- Used for various Interfaces.C_Streams calls
665
666 Closing_Status : Boolean;
667 -- For call to Close
668
669 GNAT_Static : Boolean := False;
670 -- Save state of -static option
671
672 GNAT_Shared : Boolean := False;
673 -- Save state of -shared option
674
675 Xlinker_Was_Previous : Boolean := False;
676 -- Indicate that "-Xlinker" was the option preceding the current
677 -- option. If True, then the current option is never suppressed.
678
679 -- Rollback data
680
681 -- These data items are used to store current binder file context.
682 -- The context is composed of the file descriptor position and the
683 -- current line together with the slice indexes (first and last
684 -- position) for this line. The rollback data are used by the
685 -- Store_File_Context and Rollback_File_Context routines below.
686 -- The file context mechanism interact only with the Get_Next_Line
687 -- call. For example:
688
689 -- Store_File_Context;
690 -- Get_Next_Line;
691 -- Rollback_File_Context;
692 -- Get_Next_Line;
693
694 -- Both Get_Next_Line calls above will read the exact same data from
695 -- the file. In other words, Next_Line, Nfirst and Nlast variables
696 -- will be set with the exact same values.
697
698 RB_File_Pos : long; -- File position
699 RB_Next_Line : String (1 .. 1000); -- Current line content
700 RB_Nlast : Integer; -- Slice last index
701 RB_Nfirst : Integer; -- Slice first index
702
703 Run_Path_Option_Ptr : Interfaces.C.Strings.chars_ptr;
704 pragma Import (C, Run_Path_Option_Ptr, "__gnat_run_path_option");
705 -- Pointer to string representing the native linker option which
706 -- specifies the path where the dynamic loader should find shared
707 -- libraries. Equal to null string if this system doesn't support it.
708
709 Object_Library_Ext_Ptr : Interfaces.C.Strings.chars_ptr;
710 pragma Import
711 (C, Object_Library_Ext_Ptr, "__gnat_object_library_extension");
712 -- Pointer to string specifying the default extension for
713 -- object libraries, e.g. Unix uses ".a", VMS uses ".olb".
714
715 Object_File_Option_Ptr : Interfaces.C.Strings.chars_ptr;
716 pragma Import (C, Object_File_Option_Ptr, "__gnat_object_file_option");
717 -- Pointer to a string representing the linker option which specifies
718 -- the response file.
719
720 Using_GNU_Linker : Boolean;
721 pragma Import (C, Using_GNU_Linker, "__gnat_using_gnu_linker");
722 -- Predicate indicating whether this target uses the GNU linker. In
723 -- this case we must output a GNU linker compatible response file.
724
725 Opening : aliased constant String := """";
726 Closing : aliased constant String := '"' & ASCII.LF;
727 -- Needed to quote object paths in object list files when GNU linker
728 -- is used.
729
730 procedure Get_Next_Line;
731 -- Read the next line from the binder file without the line
732 -- terminator.
733
734 function Index (S, Pattern : String) return Natural;
735 -- Return the last occurrence of Pattern in S, or 0 if none
736
737 function Is_Option_Present (Opt : String) return Boolean;
738 -- Return true if the option Opt is already present in
739 -- Linker_Options table.
740
741 procedure Store_File_Context;
742 -- Store current file context, Fd position and current line data.
743 -- The file context is stored into the rollback data above (RB_*).
744 -- Store_File_Context can be called at any time, only the last call
745 -- will be used (i.e. this routine overwrites the file context).
746
747 procedure Rollback_File_Context;
748 -- Restore file context from rollback data. This routine must be called
749 -- after Store_File_Context. The binder file context will be restored
750 -- with the data stored by the last Store_File_Context call.
751
752 -------------------
753 -- Get_Next_Line --
754 -------------------
755
756 procedure Get_Next_Line is
757 Fchars : chars;
758
759 begin
760 Fchars := fgets (Next_Line'Address, Next_Line'Length, Fd);
761
762 if Fchars = System.Null_Address then
763 Exit_With_Error ("Error reading binder output");
764 end if;
765
766 Nfirst := Next_Line'First;
767 Nlast := Nfirst;
768 while Nlast <= Next_Line'Last
769 and then Next_Line (Nlast) /= ASCII.LF
770 and then Next_Line (Nlast) /= ASCII.CR
771 loop
772 Nlast := Nlast + 1;
773 end loop;
774
775 Nlast := Nlast - 1;
776 end Get_Next_Line;
777
778 -----------
779 -- Index --
780 -----------
781
782 function Index (S, Pattern : String) return Natural is
783 Len : constant Natural := Pattern'Length;
784
785 begin
786 for J in reverse S'First .. S'Last - Len + 1 loop
787 if Pattern = S (J .. J + Len - 1) then
788 return J;
789 end if;
790 end loop;
791
792 return 0;
793 end Index;
794
795 -----------------------
796 -- Is_Option_Present --
797 -----------------------
798
799 function Is_Option_Present (Opt : String) return Boolean is
800 begin
801 for I in 1 .. Linker_Options.Last loop
802
803 if Linker_Options.Table (I).all = Opt then
804 return True;
805 end if;
806
807 end loop;
808
809 return False;
810 end Is_Option_Present;
811
812 ---------------------------
813 -- Rollback_File_Context --
814 ---------------------------
815
816 procedure Rollback_File_Context is
817 begin
818 Next_Line := RB_Next_Line;
819 Nfirst := RB_Nfirst;
820 Nlast := RB_Nlast;
821 Status := fseek (Fd, RB_File_Pos, Interfaces.C_Streams.SEEK_SET);
822
823 if Status = -1 then
824 Exit_With_Error ("Error setting file position");
825 end if;
826 end Rollback_File_Context;
827
828 ------------------------
829 -- Store_File_Context --
830 ------------------------
831
832 procedure Store_File_Context is
833 use type System.CRTL.long;
834 begin
835 RB_Next_Line := Next_Line;
836 RB_Nfirst := Nfirst;
837 RB_Nlast := Nlast;
838 RB_File_Pos := ftell (Fd);
839
840 if RB_File_Pos = -1 then
841 Exit_With_Error ("Error getting file position");
842 end if;
843 end Store_File_Context;
844
845 -- Start of processing for Process_Binder_File
846
847 begin
848 Fd := fopen (Name'Address, Read_Mode'Address);
849
850 if Fd = NULL_Stream then
851 Exit_With_Error ("Failed to open binder output");
852 end if;
853
854 -- Skip up to the Begin Info line
855
856 loop
857 Get_Next_Line;
858 exit when Next_Line (Nfirst .. Nlast) = Begin_Info;
859 end loop;
860
861 loop
862 Get_Next_Line;
863
864 -- Go to end when end line is reached (this will happen in
865 -- High_Integrity_Mode where no -L switches are generated)
866
867 exit when Next_Line (Nfirst .. Nlast) = End_Info;
868
869 if Ada_Bind_File then
870 Next_Line (Nfirst .. Nlast - 8) :=
871 Next_Line (Nfirst + 8 .. Nlast);
872 Nlast := Nlast - 8;
873 end if;
874
875 -- Go to next section when switches are reached
876
877 exit when Next_Line (1) = '-';
878
879 -- Otherwise we have another object file to collect
880
881 Linker_Objects.Increment_Last;
882
883 -- Mark the positions of first and last object files in case
884 -- they need to be placed with a named file on systems having
885 -- linker line limitations.
886
887 if Objs_Begin = 0 then
888 Objs_Begin := Linker_Objects.Last;
889 end if;
890
891 Linker_Objects.Table (Linker_Objects.Last) :=
892 new String'(Next_Line (Nfirst .. Nlast));
893
894 Link_Bytes := Link_Bytes + Nlast - Nfirst + 2;
895 -- Nlast - Nfirst + 1, for the size, plus one for the space between
896 -- each arguments.
897 end loop;
898
899 Objs_End := Linker_Objects.Last;
900
901 -- Let's continue to compute the Link_Bytes, the linker options are
902 -- part of command line length.
903
904 Store_File_Context;
905
906 while Next_Line (Nfirst .. Nlast) /= End_Info loop
907 Link_Bytes := Link_Bytes + Nlast - Nfirst + 2;
908 -- See comment above
909 Get_Next_Line;
910 end loop;
911
912 Rollback_File_Context;
913
914 -- On systems that have limitations on handling very long linker lines
915 -- we make use of the system linker option which takes a list of object
916 -- file names from a file instead of the command line itself. What we do
917 -- is to replace the list of object files by the special linker option
918 -- which then reads the object file list from a file instead. The option
919 -- to read from a file instead of the command line is only triggered if
920 -- a conservative threshold is passed.
921
922 if Object_List_File_Required
923 or else (Object_List_File_Supported
924 and then Link_Bytes > Link_Max)
925 then
926 -- Create a temporary file containing the Ada user object files
927 -- needed by the link. This list is taken from the bind file
928 -- and is output one object per line for maximal compatibility with
929 -- linkers supporting this option.
930
931 Create_Temp_File (Tname_FD, Tname);
932
933 -- ??? File descriptor should be checked to not be Invalid_FD.
934 -- ??? Status of Write and Close operations should be checked, and
935 -- failure should occur if a status is wrong.
936
937 -- If target is using the GNU linker we must add a special header
938 -- and footer in the response file.
939
940 -- The syntax is : INPUT (object1.o object2.o ... )
941
942 -- Because the GNU linker does not like name with characters such
943 -- as '!', we must put the object paths between double quotes.
944
945 if Using_GNU_Linker then
946 declare
947 GNU_Header : aliased constant String := "INPUT (";
948
949 begin
950 Status := Write (Tname_FD, GNU_Header'Address,
951 GNU_Header'Length);
952 end;
953 end if;
954
955 for J in Objs_Begin .. Objs_End loop
956
957 -- Opening quote for GNU linker
958
959 if Using_GNU_Linker then
960 Status := Write (Tname_FD, Opening'Address, 1);
961 end if;
962
963 Status := Write (Tname_FD, Linker_Objects.Table (J).all'Address,
964 Linker_Objects.Table (J).all'Length);
965
966 -- Closing quote for GNU linker
967
968 if Using_GNU_Linker then
969 Status := Write (Tname_FD, Closing'Address, 2);
970
971 else
972 Status := Write (Tname_FD, ASCII.LF'Address, 1);
973 end if;
974
975 Response_File_Objects.Increment_Last;
976 Response_File_Objects.Table (Response_File_Objects.Last) :=
977 Linker_Objects.Table (J);
978 end loop;
979
980 -- Handle GNU linker response file footer
981
982 if Using_GNU_Linker then
983 declare
984 GNU_Footer : aliased constant String := ")";
985
986 begin
987 Status := Write (Tname_FD, GNU_Footer'Address,
988 GNU_Footer'Length);
989 end;
990 end if;
991
992 Close (Tname_FD, Closing_Status);
993
994 -- Add the special objects list file option together with the name
995 -- of the temporary file (removing the null character) to the objects
996 -- file table.
997
998 Linker_Objects.Table (Objs_Begin) :=
999 new String'(Value (Object_File_Option_Ptr) &
1000 Tname (Tname'First .. Tname'Last - 1));
1001
1002 -- The slots containing these object file names are then removed
1003 -- from the objects table so they do not appear in the link. They
1004 -- are removed by moving up the linker options and non-Ada object
1005 -- files appearing after the Ada object list in the table.
1006
1007 declare
1008 N : Integer;
1009
1010 begin
1011 N := Objs_End - Objs_Begin + 1;
1012
1013 for J in Objs_End + 1 .. Linker_Objects.Last loop
1014 Linker_Objects.Table (J - N + 1) := Linker_Objects.Table (J);
1015 end loop;
1016
1017 Linker_Objects.Set_Last (Linker_Objects.Last - N + 1);
1018 end;
1019 end if;
1020
1021 -- Process switches and options
1022
1023 if Next_Line (Nfirst .. Nlast) /= End_Info then
1024 Xlinker_Was_Previous := False;
1025
1026 loop
1027 if Xlinker_Was_Previous
1028 or else Next_Line (Nfirst .. Nlast) = "-Xlinker"
1029 then
1030 Linker_Options.Increment_Last;
1031 Linker_Options.Table (Linker_Options.Last) :=
1032 new String'(Next_Line (Nfirst .. Nlast));
1033
1034 elsif Next_Line (Nfirst .. Nlast) = "-static" then
1035 GNAT_Static := True;
1036
1037 elsif Next_Line (Nfirst .. Nlast) = "-shared" then
1038 GNAT_Shared := True;
1039
1040 -- Add binder options only if not already set on the command
1041 -- line. This rule is a way to control the linker options order.
1042
1043 -- The following test needs comments, why is it VMS specific.
1044 -- The above comment looks out of date ???
1045
1046 elsif not (OpenVMS_On_Target
1047 and then
1048 Is_Option_Present (Next_Line (Nfirst .. Nlast)))
1049 then
1050 if Nlast > Nfirst + 2 and then
1051 Next_Line (Nfirst .. Nfirst + 1) = "-L"
1052 then
1053 -- Construct a library search path for use later
1054 -- to locate static gnatlib libraries.
1055
1056 if Libpath.Last > 1 then
1057 Libpath.Increment_Last;
1058 Libpath.Table (Libpath.Last) := Path_Separator;
1059 end if;
1060
1061 for I in Nfirst + 2 .. Nlast loop
1062 Libpath.Increment_Last;
1063 Libpath.Table (Libpath.Last) := Next_Line (I);
1064 end loop;
1065
1066 Linker_Options.Increment_Last;
1067
1068 Linker_Options.Table (Linker_Options.Last) :=
1069 new String'(Next_Line (Nfirst .. Nlast));
1070
1071 elsif Next_Line (Nfirst .. Nlast) = "-ldecgnat"
1072 or else Next_Line (Nfirst .. Nlast) = "-lgnarl"
1073 or else Next_Line (Nfirst .. Nlast) = "-lgnat"
1074 or else Next_Line
1075 (1 .. Natural'Min (Nlast, 8 + Library_Version'Length)) =
1076 Shared_Lib ("gnarl")
1077 or else Next_Line
1078 (1 .. Natural'Min (Nlast, 7 + Library_Version'Length)) =
1079 Shared_Lib ("gnat")
1080 then
1081 -- If it is a shared library, remove the library version.
1082 -- We will be looking for the static version of the library
1083 -- as it is in the same directory as the shared version.
1084
1085 if Next_Line (Nlast - Library_Version'Length + 1 .. Nlast)
1086 = Library_Version
1087 then
1088 -- Set Last to point to last character before the
1089 -- library version.
1090
1091 Last := Nlast - Library_Version'Length - 1;
1092 else
1093 Last := Nlast;
1094 end if;
1095
1096 -- Given a Gnat standard library, search the
1097 -- library path to find the library location
1098
1099 declare
1100 File_Path : String_Access;
1101
1102 Object_Lib_Extension : constant String :=
1103 Value (Object_Library_Ext_Ptr);
1104
1105 File_Name : constant String := "lib" &
1106 Next_Line (Nfirst + 2 .. Last) &
1107 Object_Lib_Extension;
1108
1109 Run_Path_Opt : constant String :=
1110 Value (Run_Path_Option_Ptr);
1111
1112 GCC_Index : Natural;
1113 Run_Path_Opt_Index : Natural := 0;
1114
1115 begin
1116 File_Path :=
1117 Locate_Regular_File (File_Name,
1118 String (Libpath.Table (1 .. Libpath.Last)));
1119
1120 if File_Path /= null then
1121 if GNAT_Static then
1122
1123 -- If static gnatlib found, explicitly
1124 -- specify to overcome possible linker
1125 -- default usage of shared version.
1126
1127 Linker_Options.Increment_Last;
1128
1129 Linker_Options.Table (Linker_Options.Last) :=
1130 new String'(File_Path.all);
1131
1132 elsif GNAT_Shared then
1133 if Opt.Run_Path_Option then
1134 -- If shared gnatlib desired, add the
1135 -- appropriate system specific switch
1136 -- so that it can be located at runtime.
1137
1138 if Run_Path_Opt'Length /= 0 then
1139 -- Output the system specific linker command
1140 -- that allows the image activator to find
1141 -- the shared library at runtime.
1142 -- Also add path to find libgcc_s.so, if
1143 -- relevant.
1144
1145 -- To find the location of the shared version
1146 -- of libgcc, we look for "gcc-lib" in the
1147 -- path of the library. However, this
1148 -- subdirectory is no longer present in
1149 -- in recent version of GCC. So, we look for
1150 -- the last subdirectory "lib" in the path.
1151
1152 GCC_Index :=
1153 Index (File_Path.all, "gcc-lib");
1154
1155 if GCC_Index /= 0 then
1156 -- The shared version of libgcc is
1157 -- located in the parent directory.
1158
1159 GCC_Index := GCC_Index - 1;
1160
1161 else
1162 GCC_Index :=
1163 Index (File_Path.all, "/lib/");
1164
1165 if GCC_Index = 0 then
1166 GCC_Index :=
1167 Index (File_Path.all,
1168 Directory_Separator &
1169 "lib" &
1170 Directory_Separator);
1171 end if;
1172
1173 -- We have found a subdirectory "lib",
1174 -- this is where the shared version of
1175 -- libgcc should be located.
1176
1177 if GCC_Index /= 0 then
1178 GCC_Index := GCC_Index + 3;
1179 end if;
1180 end if;
1181
1182 -- Look for an eventual run_path_option in
1183 -- the linker switches.
1184
1185 for J in reverse 1 .. Linker_Options.Last loop
1186 if Linker_Options.Table (J) /= null
1187 and then
1188 Linker_Options.Table (J)'Length
1189 > Run_Path_Opt'Length
1190 and then
1191 Linker_Options.Table (J)
1192 (1 .. Run_Path_Opt'Length) =
1193 Run_Path_Opt
1194 then
1195 -- We have found a already specified
1196 -- run_path_option: we will add to this
1197 -- switch, because only one
1198 -- run_path_option should be specified.
1199
1200 Run_Path_Opt_Index := J;
1201 exit;
1202 end if;
1203 end loop;
1204
1205 -- If there is no run_path_option, we need
1206 -- to add one.
1207
1208 if Run_Path_Opt_Index = 0 then
1209 Linker_Options.Increment_Last;
1210 end if;
1211
1212 if GCC_Index = 0 then
1213 if Run_Path_Opt_Index = 0 then
1214 Linker_Options.Table
1215 (Linker_Options.Last) :=
1216 new String'
1217 (Run_Path_Opt
1218 & File_Path
1219 (1 .. File_Path'Length
1220 - File_Name'Length));
1221
1222 else
1223 Linker_Options.Table
1224 (Run_Path_Opt_Index) :=
1225 new String'
1226 (Linker_Options.Table
1227 (Run_Path_Opt_Index).all
1228 & Path_Separator
1229 & File_Path
1230 (1 .. File_Path'Length
1231 - File_Name'Length));
1232 end if;
1233
1234 else
1235 if Run_Path_Opt_Index = 0 then
1236 Linker_Options.Table
1237 (Linker_Options.Last) :=
1238 new String'(Run_Path_Opt
1239 & File_Path
1240 (1 .. File_Path'Length
1241 - File_Name'Length)
1242 & Path_Separator
1243 & File_Path (1 .. GCC_Index));
1244
1245 else
1246 Linker_Options.Table
1247 (Run_Path_Opt_Index) :=
1248 new String'
1249 (Linker_Options.Table
1250 (Run_Path_Opt_Index).all
1251 & Path_Separator
1252 & File_Path
1253 (1 .. File_Path'Length
1254 - File_Name'Length)
1255 & Path_Separator
1256 & File_Path (1 .. GCC_Index));
1257 end if;
1258 end if;
1259 end if;
1260 end if;
1261
1262 -- Then we add the appropriate -l switch
1263
1264 Linker_Options.Increment_Last;
1265 Linker_Options.Table (Linker_Options.Last) :=
1266 new String'(Next_Line (Nfirst .. Nlast));
1267 end if;
1268
1269 else
1270 -- If gnatlib library not found, then
1271 -- add it anyway in case some other
1272 -- mechanimsm may find it.
1273
1274 Linker_Options.Increment_Last;
1275 Linker_Options.Table (Linker_Options.Last) :=
1276 new String'(Next_Line (Nfirst .. Nlast));
1277 end if;
1278 end;
1279 else
1280 Linker_Options.Increment_Last;
1281 Linker_Options.Table (Linker_Options.Last) :=
1282 new String'(Next_Line (Nfirst .. Nlast));
1283 end if;
1284 end if;
1285
1286 Xlinker_Was_Previous := Next_Line (Nfirst .. Nlast) = "-Xlinker";
1287
1288 Get_Next_Line;
1289 exit when Next_Line (Nfirst .. Nlast) = End_Info;
1290
1291 if Ada_Bind_File then
1292 Next_Line (Nfirst .. Nlast - 8) :=
1293 Next_Line (Nfirst + 8 .. Nlast);
1294 Nlast := Nlast - 8;
1295 end if;
1296 end loop;
1297 end if;
1298
1299 -- If -shared was specified, invoke gcc with -shared-libgcc
1300
1301 if GNAT_Shared then
1302 Linker_Options.Increment_Last;
1303 Linker_Options.Table (Linker_Options.Last) := Shared_Libgcc;
1304 end if;
1305
1306 Status := fclose (Fd);
1307 end Process_Binder_File;
1308
1309 ------------------
1310 -- Write_Header --
1311 ------------------
1312
1313 procedure Write_Header is
1314 begin
1315 if Verbose_Mode then
1316 Write_Eol;
1317 Write_Str ("GNATLINK ");
1318 Write_Str (Gnat_Version_String);
1319 Write_Eol;
1320 Write_Str ("Copyright 1995-" &
1321 Current_Year &
1322 ", Free Software Foundation, Inc");
1323 Write_Eol;
1324 end if;
1325 end Write_Header;
1326
1327 -----------------
1328 -- Write_Usage --
1329 -----------------
1330
1331 procedure Write_Usage is
1332 begin
1333 Write_Header;
1334
1335 Write_Str ("Usage: ");
1336 Write_Str (Base_Name (Command_Name));
1337 Write_Str (" switches mainprog.ali [non-Ada-objects] [linker-options]");
1338 Write_Eol;
1339 Write_Eol;
1340 Write_Line (" mainprog.ali the ALI file of the main program");
1341 Write_Eol;
1342 Write_Line (" -A Binder generated source file is in Ada (default)");
1343 Write_Line (" -C Binder generated source file is in C");
1344 Write_Line (" -f force object file list to be generated");
1345 Write_Line (" -g Compile binder source file with debug information");
1346 Write_Line (" -n Do not compile the binder source file");
1347 Write_Line (" -R Do not use a run_path_option");
1348 Write_Line (" -v verbose mode");
1349 Write_Line (" -v -v very verbose mode");
1350 Write_Eol;
1351 Write_Line (" -o nam Use 'nam' as the name of the executable");
1352 Write_Line (" -b target Compile the binder source to run on target");
1353 Write_Line (" -Bdir Load compiler executables from dir");
1354
1355 if Is_Supported (Map_File) then
1356 Write_Line (" -Mmap Create map file map");
1357 Write_Line (" -M Create map file mainprog.map");
1358 end if;
1359
1360 Write_Line (" --GCC=comp Use comp as the compiler");
1361 Write_Line (" --LINK=nam Use 'nam' for the linking rather than 'gcc'");
1362 Write_Eol;
1363 Write_Line (" [non-Ada-objects] list of non Ada object files");
1364 Write_Line (" [linker-options] other options for the linker");
1365 end Write_Usage;
1366
1367 -- Start of processing for Gnatlink
1368
1369 begin
1370 -- Add the directory where gnatlink is invoked in front of the
1371 -- path, if gnatlink is invoked with directory information.
1372 -- Only do this if the platform is not VMS, where the notion of path
1373 -- does not really exist.
1374
1375 if not Hostparm.OpenVMS then
1376 declare
1377 Command : constant String := Command_Name;
1378
1379 begin
1380 for Index in reverse Command'Range loop
1381 if Command (Index) = Directory_Separator then
1382 declare
1383 Absolute_Dir : constant String :=
1384 Normalize_Pathname
1385 (Command (Command'First .. Index));
1386
1387 PATH : constant String :=
1388 Absolute_Dir &
1389 Path_Separator &
1390 Getenv ("PATH").all;
1391
1392 begin
1393 Setenv ("PATH", PATH);
1394 end;
1395
1396 exit;
1397 end if;
1398 end loop;
1399 end;
1400 end if;
1401
1402 Process_Args;
1403
1404 if Argument_Count = 0
1405 or else
1406 (Verbose_Mode and then Argument_Count = 1)
1407 then
1408 Write_Usage;
1409 Exit_Program (E_Fatal);
1410 end if;
1411
1412 if Hostparm.Java_VM then
1413 Gcc := new String'("jgnat");
1414 Ada_Bind_File := True;
1415 Begin_Info := "-- BEGIN Object file/option list";
1416 End_Info := "-- END Object file/option list ";
1417 end if;
1418
1419 -- We always compile with -c
1420
1421 Binder_Options_From_ALI.Increment_Last;
1422 Binder_Options_From_ALI.Table (Binder_Options_From_ALI.Last) :=
1423 new String'("-c");
1424
1425 -- If the main program is in Ada it is compiled with the following
1426 -- switches:
1427
1428 -- -gnatA stops reading gnat.adc, since we don't know what
1429 -- pagmas would work, and we do not need it anyway.
1430
1431 -- -gnatWb allows brackets coding for wide characters
1432
1433 -- -gnatiw allows wide characters in identifiers. This is needed
1434 -- because bindgen uses brackets encoding for all upper
1435 -- half and wide characters in identifier names.
1436
1437 if Ada_Bind_File then
1438 Binder_Options_From_ALI.Increment_Last;
1439 Binder_Options_From_ALI.Table (Binder_Options_From_ALI.Last) :=
1440 new String'("-gnatA");
1441 Binder_Options_From_ALI.Increment_Last;
1442 Binder_Options_From_ALI.Table (Binder_Options_From_ALI.Last) :=
1443 new String'("-gnatWb");
1444 Binder_Options_From_ALI.Increment_Last;
1445 Binder_Options_From_ALI.Table (Binder_Options_From_ALI.Last) :=
1446 new String'("-gnatiw");
1447 end if;
1448
1449 -- Locate all the necessary programs and verify required files are present
1450
1451 Gcc_Path := GNAT.OS_Lib.Locate_Exec_On_Path (Gcc.all);
1452
1453 if Gcc_Path = null then
1454 Exit_With_Error ("Couldn't locate " & Gcc.all);
1455 end if;
1456
1457 if Linker_Path = null then
1458 Linker_Path := Gcc_Path;
1459 end if;
1460
1461 if Ali_File_Name = null then
1462 Exit_With_Error ("no ali file given for link");
1463 end if;
1464
1465 if not Is_Regular_File (Ali_File_Name.all) then
1466 Exit_With_Error (Ali_File_Name.all & " not found");
1467 end if;
1468
1469 -- Get target parameters
1470
1471 Namet.Initialize;
1472 Csets.Initialize;
1473 Snames.Initialize;
1474 Osint.Add_Default_Search_Dirs;
1475 Targparm.Get_Target_Parameters;
1476
1477 -- Read the ALI file of the main subprogram if the binder generated
1478 -- file needs to be compiled and no --GCC= switch has been specified.
1479 -- Fetch the back end switches from this ALI file and use these switches
1480 -- to compile the binder generated file
1481
1482 if Compile_Bind_File and then Standard_Gcc then
1483
1484 Initialize_ALI;
1485 Name_Len := Ali_File_Name'Length;
1486 Name_Buffer (1 .. Name_Len) := Ali_File_Name.all;
1487
1488 declare
1489 use Types;
1490 F : constant File_Name_Type := Name_Find;
1491 T : Text_Buffer_Ptr;
1492 A : ALI_Id;
1493
1494 begin
1495 -- Load the ALI file
1496
1497 T := Read_Library_Info (F, True);
1498
1499 -- Read it. Note that we ignore errors, since we only want very
1500 -- limited information from the ali file, and likely a slightly
1501 -- wrong version will be just fine, though in normal operation
1502 -- we don't expect this to happen!
1503
1504 A := Scan_ALI
1505 (F,
1506 T,
1507 Ignore_ED => False,
1508 Err => False,
1509 Ignore_Errors => True);
1510
1511 if A /= No_ALI_Id then
1512 for
1513 Index in Units.Table (ALIs.Table (A).First_Unit).First_Arg ..
1514 Units.Table (ALIs.Table (A).First_Unit).Last_Arg
1515 loop
1516 -- Do not compile with the front end switches except for --RTS
1517 -- if the binder generated file is in Ada.
1518
1519 declare
1520 Arg : String_Ptr renames Args.Table (Index);
1521 begin
1522 if not Is_Front_End_Switch (Arg.all)
1523 or else
1524 (Ada_Bind_File
1525 and then Arg'Length > 5
1526 and then Arg (Arg'First + 2 .. Arg'First + 5) = "RTS=")
1527 then
1528 Binder_Options_From_ALI.Increment_Last;
1529 Binder_Options_From_ALI.Table
1530 (Binder_Options_From_ALI.Last) := String_Access (Arg);
1531 end if;
1532 end;
1533 end loop;
1534 end if;
1535 end;
1536 end if;
1537
1538 Write_Header;
1539
1540 -- If no output name specified, then use the base name of .ali file name
1541
1542 if Output_File_Name = null then
1543 Output_File_Name :=
1544 new String'(Base_Name (Ali_File_Name.all)
1545 & Get_Target_Debuggable_Suffix.all);
1546
1547 Linker_Options.Increment_Last;
1548 Linker_Options.Table (Linker_Options.Last) :=
1549 new String'("-o");
1550
1551 Linker_Options.Increment_Last;
1552 Linker_Options.Table (Linker_Options.Last) :=
1553 new String'(Output_File_Name.all);
1554 end if;
1555
1556 -- Warn if main program is called "test", as that may be a built-in command
1557 -- on Unix. On non-Unix systems executables have a suffix, so the warning
1558 -- will not appear. However, do not warn in the case of a cross compiler.
1559
1560 -- Assume this is a cross tool if the executable name is not gnatlink
1561
1562 if Base_Name (Command_Name) = "gnatlink"
1563 and then Output_File_Name.all = "test"
1564 then
1565 Error_Msg ("warning: executable name """ & Output_File_Name.all
1566 & """ may conflict with shell command");
1567 end if;
1568
1569 -- If -M switch was specified, add the switches to create the map file
1570
1571 if Create_Map_File then
1572 declare
1573 Map_Name : constant String := Base_Name (Ali_File_Name.all) & ".map";
1574 Switches : String_List_Access;
1575
1576 begin
1577 Convert (Map_File, Map_Name, Switches);
1578
1579 if Switches /= null then
1580 for J in Switches'Range loop
1581 Linker_Options.Increment_Last;
1582 Linker_Options.Table (Linker_Options.Last) := Switches (J);
1583 end loop;
1584 end if;
1585 end;
1586 end if;
1587
1588 -- Perform consistency checks
1589
1590 -- Transform the .ali file name into the binder output file name
1591
1592 Make_Binder_File_Names : declare
1593 Fname : constant String := Base_Name (Ali_File_Name.all);
1594 Fname_Len : Integer := Fname'Length;
1595
1596 function Get_Maximum_File_Name_Length return Integer;
1597 pragma Import (C, Get_Maximum_File_Name_Length,
1598 "__gnat_get_maximum_file_name_length");
1599
1600 Maximum_File_Name_Length : constant Integer :=
1601 Get_Maximum_File_Name_Length;
1602
1603 Bind_File_Prefix : Types.String_Ptr;
1604 -- Contains prefix used for bind files
1605
1606 begin
1607 -- Set prefix
1608
1609 if not Ada_Bind_File then
1610 Bind_File_Prefix := new String'("b_");
1611 elsif OpenVMS_On_Target then
1612 Bind_File_Prefix := new String'("b__");
1613 else
1614 Bind_File_Prefix := new String'("b~");
1615 end if;
1616
1617 -- If the length of the binder file becomes too long due to
1618 -- the addition of the "b?" prefix, then truncate it.
1619
1620 if Maximum_File_Name_Length > 0 then
1621 while Fname_Len >
1622 Maximum_File_Name_Length - Bind_File_Prefix.all'Length
1623 loop
1624 Fname_Len := Fname_Len - 1;
1625 end loop;
1626 end if;
1627
1628 declare
1629 Fnam : constant String :=
1630 Bind_File_Prefix.all &
1631 Fname (Fname'First .. Fname'First + Fname_Len - 1);
1632
1633 begin
1634 if Ada_Bind_File then
1635 Binder_Spec_Src_File := new String'(Fnam & ".ads");
1636 Binder_Body_Src_File := new String'(Fnam & ".adb");
1637 Binder_Ali_File := new String'(Fnam & ".ali");
1638 else
1639 Binder_Body_Src_File := new String'(Fnam & ".c");
1640 end if;
1641
1642 Binder_Obj_File := new String'(Fnam & Get_Target_Object_Suffix.all);
1643 end;
1644
1645 if Fname_Len /= Fname'Length then
1646 Binder_Options.Increment_Last;
1647 Binder_Options.Table (Binder_Options.Last) := new String'("-o");
1648 Binder_Options.Increment_Last;
1649 Binder_Options.Table (Binder_Options.Last) := Binder_Obj_File;
1650 end if;
1651 end Make_Binder_File_Names;
1652
1653 Process_Binder_File (Binder_Body_Src_File.all & ASCII.NUL);
1654
1655 -- Compile the binder file. This is fast, so we always do it, unless
1656 -- specifically told not to by the -n switch
1657
1658 if Compile_Bind_File then
1659 Bind_Step : declare
1660 Success : Boolean;
1661 Args : Argument_List
1662 (1 .. Binder_Options_From_ALI.Last + Binder_Options.Last + 1);
1663
1664 begin
1665 for J in 1 .. Binder_Options_From_ALI.Last loop
1666 Args (J) := Binder_Options_From_ALI.Table (J);
1667 end loop;
1668
1669 for J in 1 .. Binder_Options.Last loop
1670 Args (Binder_Options_From_ALI.Last + J) :=
1671 Binder_Options.Table (J);
1672 end loop;
1673
1674 Args (Args'Last) := Binder_Body_Src_File;
1675
1676 if Verbose_Mode then
1677 Write_Str (Base_Name (Gcc_Path.all));
1678
1679 for J in Args'Range loop
1680 Write_Str (" ");
1681 Write_Str (Args (J).all);
1682 end loop;
1683
1684 Write_Eol;
1685 end if;
1686
1687 GNAT.OS_Lib.Spawn (Gcc_Path.all, Args, Success);
1688
1689 if not Success then
1690 Exit_Program (E_Fatal);
1691 end if;
1692 end Bind_Step;
1693 end if;
1694
1695 -- Now, actually link the program
1696
1697 -- Skip this step for now on the JVM since the Java interpreter will do
1698 -- the actual link at run time. We might consider packing all class files
1699 -- in a .zip file during this step.
1700
1701 if not Hostparm.Java_VM then
1702 Link_Step : declare
1703 Num_Args : Natural :=
1704 (Linker_Options.Last - Linker_Options.First + 1) +
1705 (Gcc_Linker_Options.Last - Gcc_Linker_Options.First + 1) +
1706 (Linker_Objects.Last - Linker_Objects.First + 1);
1707 Stack_Op : Boolean := False;
1708 IDENT_Op : Boolean := False;
1709
1710 begin
1711 -- Remove duplicate stack size setting from the Linker_Options
1712 -- table. The stack setting option "-Xlinker --stack=R,C" can be
1713 -- found in one line when set by a pragma Linker_Options or in two
1714 -- lines ("-Xlinker" then "--stack=R,C") when set on the command
1715 -- line. We also check for the "-Wl,--stack=R" style option.
1716
1717 -- We must remove the second stack setting option instance
1718 -- because the one on the command line will always be the first
1719 -- one. And any subsequent stack setting option will overwrite the
1720 -- previous one. This is done especially for GNAT/NT where we set
1721 -- the stack size for tasking programs by a pragma in the NT
1722 -- specific tasking package System.Task_Primitives.Oparations.
1723
1724 -- Note: This is not a FOR loop that runs from Linker_Options.First
1725 -- to Linker_Options.Last, since operations within the loop can
1726 -- modify the length of the table.
1727
1728 Clean_Link_Option_Set : declare
1729 J : Natural := Linker_Options.First;
1730 Shared_Libgcc_Seen : Boolean := False;
1731
1732 begin
1733 while J <= Linker_Options.Last loop
1734
1735 if Linker_Options.Table (J).all = "-Xlinker"
1736 and then J < Linker_Options.Last
1737 and then Linker_Options.Table (J + 1)'Length > 8
1738 and then Linker_Options.Table (J + 1) (1 .. 8) = "--stack="
1739 then
1740 if Stack_Op then
1741 Linker_Options.Table (J .. Linker_Options.Last - 2) :=
1742 Linker_Options.Table (J + 2 .. Linker_Options.Last);
1743 Linker_Options.Decrement_Last;
1744 Linker_Options.Decrement_Last;
1745 Num_Args := Num_Args - 2;
1746
1747 else
1748 Stack_Op := True;
1749 end if;
1750 end if;
1751
1752 -- Remove duplicate -shared-libgcc switch
1753
1754 if Linker_Options.Table (J).all = Shared_Libgcc_String then
1755 if Shared_Libgcc_Seen then
1756 Linker_Options.Table (J .. Linker_Options.Last - 1) :=
1757 Linker_Options.Table (J + 1 .. Linker_Options.Last);
1758 Linker_Options.Decrement_Last;
1759 Num_Args := Num_Args - 1;
1760
1761 else
1762 Shared_Libgcc_Seen := True;
1763 end if;
1764 end if;
1765
1766 -- Here we just check for a canonical form that matches the
1767 -- pragma Linker_Options set in the NT runtime.
1768
1769 if (Linker_Options.Table (J)'Length > 17
1770 and then Linker_Options.Table (J) (1 .. 17)
1771 = "-Xlinker --stack=")
1772 or else
1773 (Linker_Options.Table (J)'Length > 12
1774 and then Linker_Options.Table (J) (1 .. 12)
1775 = "-Wl,--stack=")
1776 then
1777 if Stack_Op then
1778 Linker_Options.Table (J .. Linker_Options.Last - 1) :=
1779 Linker_Options.Table (J + 1 .. Linker_Options.Last);
1780 Linker_Options.Decrement_Last;
1781 Num_Args := Num_Args - 1;
1782
1783 else
1784 Stack_Op := True;
1785 end if;
1786 end if;
1787
1788 -- Remove duplicate IDENTIFICATION directives (VMS)
1789
1790 if Linker_Options.Table (J)'Length > 27
1791 and then Linker_Options.Table (J) (1 .. 28)
1792 = "--for-linker=IDENTIFICATION="
1793 then
1794 if IDENT_Op then
1795 Linker_Options.Table (J .. Linker_Options.Last - 1) :=
1796 Linker_Options.Table (J + 1 .. Linker_Options.Last);
1797 Linker_Options.Decrement_Last;
1798 Num_Args := Num_Args - 1;
1799 else
1800 IDENT_Op := True;
1801 end if;
1802 end if;
1803
1804 J := J + 1;
1805 end loop;
1806 end Clean_Link_Option_Set;
1807
1808 -- Prepare arguments for call to linker
1809
1810 Call_Linker : declare
1811 Success : Boolean;
1812 Args : Argument_List (1 .. Num_Args + 1);
1813 Index : Integer := Args'First;
1814
1815 begin
1816 Args (Index) := Binder_Obj_File;
1817
1818 -- Add the object files and any -largs libraries
1819
1820 for J in Linker_Objects.First .. Linker_Objects.Last loop
1821 Index := Index + 1;
1822 Args (Index) := Linker_Objects.Table (J);
1823 end loop;
1824
1825 -- Add the linker options from the binder file
1826
1827 for J in Linker_Options.First .. Linker_Options.Last loop
1828 Index := Index + 1;
1829 Args (Index) := Linker_Options.Table (J);
1830 end loop;
1831
1832 -- Finally add the libraries from the --GCC= switch
1833
1834 for J in Gcc_Linker_Options.First .. Gcc_Linker_Options.Last loop
1835 Index := Index + 1;
1836 Args (Index) := Gcc_Linker_Options.Table (J);
1837 end loop;
1838
1839 if Verbose_Mode then
1840 Write_Str (Linker_Path.all);
1841
1842 for J in Args'Range loop
1843 Write_Str (" ");
1844 Write_Str (Args (J).all);
1845 end loop;
1846
1847 Write_Eol;
1848
1849 -- If we are on very verbose mode (-v -v) and a response file
1850 -- is used we display its content.
1851
1852 if Very_Verbose_Mode and then Tname_FD /= Invalid_FD then
1853 Write_Eol;
1854 Write_Str ("Response file (" &
1855 Tname (Tname'First .. Tname'Last - 1) &
1856 ") content : ");
1857 Write_Eol;
1858
1859 for J in
1860 Response_File_Objects.First ..
1861 Response_File_Objects.Last
1862 loop
1863 Write_Str (Response_File_Objects.Table (J).all);
1864 Write_Eol;
1865 end loop;
1866
1867 Write_Eol;
1868 end if;
1869 end if;
1870
1871 GNAT.OS_Lib.Spawn (Linker_Path.all, Args, Success);
1872
1873 -- Delete the temporary file used in conjuction with linking if
1874 -- one was created. See Process_Bind_File for details.
1875
1876 if Tname_FD /= Invalid_FD then
1877 Delete (Tname);
1878 end if;
1879
1880 if not Success then
1881 Error_Msg ("cannot call " & Linker_Path.all);
1882 Exit_Program (E_Fatal);
1883 end if;
1884 end Call_Linker;
1885 end Link_Step;
1886 end if;
1887
1888 -- Only keep the binder output file and it's associated object
1889 -- file if compiling with the -g option. These files are only
1890 -- useful if debugging.
1891
1892 if not Debug_Flag_Present then
1893 if Binder_Ali_File /= null then
1894 Delete (Binder_Ali_File.all & ASCII.NUL);
1895 end if;
1896
1897 if Binder_Spec_Src_File /= null then
1898 Delete (Binder_Spec_Src_File.all & ASCII.NUL);
1899 end if;
1900
1901 Delete (Binder_Body_Src_File.all & ASCII.NUL);
1902
1903 if not Hostparm.Java_VM then
1904 Delete (Binder_Obj_File.all & ASCII.NUL);
1905 end if;
1906 end if;
1907
1908 Exit_Program (E_Success);
1909
1910 exception
1911 when X : others =>
1912 Write_Line (Exception_Information (X));
1913 Exit_With_Error ("INTERNAL ERROR. Please report");
1914 end Gnatlink;
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