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* lto.c (do_stream_out): Add PART parameter; open dump file.
[official-gcc.git] / gcc / ada / gnatlink.adb
blobf712a7abb6c546c286652242cb258cb5b5756e77
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) 1996-2018, 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 Indepsw; use Indepsw;
32 with Namet; use Namet;
33 with Opt;
34 with Osint; use Osint;
35 with Output; use Output;
36 with Snames;
37 with Switch; use Switch;
38 with System; use System;
39 with Table;
40 with Targparm;
41 with Types;
42
43 with Ada.Command_Line; use Ada.Command_Line;
44 with Ada.Exceptions; use Ada.Exceptions;
45
46 with System.OS_Lib; use System.OS_Lib;
47 with System.CRTL;
48
49 with Interfaces.C_Streams; use Interfaces.C_Streams;
50 with Interfaces.C.Strings; use Interfaces.C.Strings;
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 Static_Libgcc_String : constant String := "-static-libgcc";
61 Static_Libgcc : constant String_Access :=
62 new String'(Static_Libgcc_String);
63 -- Used to invoke gcc when shared libs are not used
64
65 package Gcc_Linker_Options is new Table.Table (
66 Table_Component_Type => String_Access,
67 Table_Index_Type => Integer,
68 Table_Low_Bound => 1,
69 Table_Initial => 20,
70 Table_Increment => 100,
71 Table_Name => "Gnatlink.Gcc_Linker_Options");
72 -- Comments needed ???
73
74 package Libpath is new Table.Table (
75 Table_Component_Type => Character,
76 Table_Index_Type => Integer,
77 Table_Low_Bound => 1,
78 Table_Initial => 4096,
79 Table_Increment => 100,
80 Table_Name => "Gnatlink.Libpath");
81 -- Comments needed ???
82
83 package Linker_Options is new Table.Table (
84 Table_Component_Type => String_Access,
85 Table_Index_Type => Integer,
86 Table_Low_Bound => 1,
87 Table_Initial => 20,
88 Table_Increment => 100,
89 Table_Name => "Gnatlink.Linker_Options");
90 -- Comments needed ???
91
92 package Linker_Objects is new Table.Table (
93 Table_Component_Type => String_Access,
94 Table_Index_Type => Integer,
95 Table_Low_Bound => 1,
96 Table_Initial => 20,
97 Table_Increment => 100,
98 Table_Name => "Gnatlink.Linker_Objects");
99 -- This table collects the objects file to be passed to the linker. In the
100 -- case where the linker command line is too long then programs objects
101 -- are put on the Response_File_Objects table. Note that the binder object
102 -- file and the user's objects remain in this table. This is very
103 -- important because on the GNU linker command line the -L switch is not
104 -- used to look for objects files but -L switch is used to look for
105 -- objects listed in the response file. This is not a problem with the
106 -- applications objects as they are specified with a full name.
107
108 package Response_File_Objects is new Table.Table (
109 Table_Component_Type => String_Access,
110 Table_Index_Type => Integer,
111 Table_Low_Bound => 1,
112 Table_Initial => 20,
113 Table_Increment => 100,
114 Table_Name => "Gnatlink.Response_File_Objects");
115 -- This table collects the objects file that are to be put in the response
116 -- file. Only application objects are collected there (see details in
117 -- Linker_Objects table comments)
118
119 package Binder_Options_From_ALI is new Table.Table (
120 Table_Component_Type => String_Access,
121 Table_Index_Type => Integer,
122 Table_Low_Bound => 1, -- equals low bound of Argument_List for Spawn
123 Table_Initial => 20,
124 Table_Increment => 100,
125 Table_Name => "Gnatlink.Binder_Options_From_ALI");
126 -- This table collects the switches from the ALI file of the main
127 -- subprogram.
128
129 package Binder_Options is new Table.Table (
130 Table_Component_Type => String_Access,
131 Table_Index_Type => Integer,
132 Table_Low_Bound => 1, -- equals low bound of Argument_List for Spawn
133 Table_Initial => 20,
134 Table_Increment => 100,
135 Table_Name => "Gnatlink.Binder_Options");
136 -- This table collects the arguments to be passed to compile the binder
137 -- generated file.
138
139 Gcc : String_Access := Program_Name ("gcc", "gnatlink");
140
141 Read_Mode : constant String := "r" & ASCII.NUL;
142
143 Begin_Info : constant String := "-- BEGIN Object file/option list";
144 End_Info : constant String := "-- END Object file/option list ";
145
146 Gcc_Path : String_Access;
147 Linker_Path : String_Access;
148 Output_File_Name : String_Access;
149 Ali_File_Name : String_Access;
150 Binder_Spec_Src_File : String_Access;
151 Binder_Body_Src_File : String_Access;
152 Binder_Ali_File : String_Access;
153 Binder_Obj_File : String_Access;
154
155 Base_Command_Name : String_Access;
156
157 Target_Debuggable_Suffix : String_Access;
158
159 Tname : Temp_File_Name;
160 Tname_FD : File_Descriptor := Invalid_FD;
161 -- Temporary file used by linker to pass list of object files on
162 -- certain systems with limitations on size of arguments.
163
164 Debug_Flag_Present : Boolean := False;
165 Verbose_Mode : Boolean := False;
166 Very_Verbose_Mode : Boolean := False;
167
168 Standard_Gcc : Boolean := True;
169
170 Compile_Bind_File : Boolean := True;
171 -- Set to False if bind file is not to be compiled
172
173 Create_Map_File : Boolean := False;
174 -- Set to True by switch -M. The map file name is derived from
175 -- the ALI file name (mainprog.ali => mainprog.map).
176
177 Object_List_File_Supported : Boolean;
178 for Object_List_File_Supported'Size use Character'Size;
179 pragma Import
180 (C, Object_List_File_Supported, "__gnat_objlist_file_supported");
181 -- Predicate indicating whether the linker has an option whereby the
182 -- names of object files can be passed to the linker in a file.
183
184 Object_File_Option_Ptr : Interfaces.C.Strings.chars_ptr;
185 pragma Import (C, Object_File_Option_Ptr, "__gnat_object_file_option");
186 -- Pointer to a string representing the linker option which specifies
187 -- the response file.
188
189 Object_File_Option : constant String := Value (Object_File_Option_Ptr);
190 -- The linker option which specifies the response file as a string
191
192 Using_GNU_response_file : constant Boolean :=
193 Object_File_Option'Length > 0
194 and then Object_File_Option (Object_File_Option'Last) = '@';
195 -- Whether a GNU response file is used
196
197 Object_List_File_Required : Boolean := False;
198 -- Set to True to force generation of a response file
199
200 Shared_Libgcc_Default : Character;
201 for Shared_Libgcc_Default'Size use Character'Size;
202 pragma Import
203 (C, Shared_Libgcc_Default, "__gnat_shared_libgcc_default");
204 -- Indicates wether libgcc should be statically linked (use 'T') or
205 -- dynamically linked (use 'H') by default.
206
207 function Base_Name (File_Name : String) return String;
208 -- Return just the file name part without the extension (if present)
209
210 procedure Check_Existing_Executable (File_Name : String);
211 -- Delete any existing executable to avoid accidentally updating the target
212 -- of a symbolic link, but produce a Fatail_Error if File_Name matches any
213 -- of the source file names. This avoids overwriting of extensionless
214 -- source files by accident on systems where executables do not have
215 -- extensions.
216
217 procedure Delete (Name : String);
218 -- Wrapper to unlink as status is ignored by this application
219
220 procedure Error_Msg (Message : String);
221 -- Output the error or warning Message
222
223 procedure Exit_With_Error (Error : String);
224 -- Output Error and exit program with a fatal condition
225
226 procedure Process_Args;
227 -- Go through all the arguments and build option tables
228
229 procedure Process_Binder_File (Name : String);
230 -- Reads the binder file and extracts linker arguments
231
232 procedure Usage;
233 -- Display usage
234
235 procedure Write_Header;
236 -- Show user the program name, version and copyright
237
238 procedure Write_Usage;
239 -- Show user the program options
240
241 ---------------
242 -- Base_Name --
243 ---------------
244
245 function Base_Name (File_Name : String) return String is
246 Findex1 : Natural;
247 Findex2 : Natural;
248
249 begin
250 Findex1 := File_Name'First;
251
252 -- The file might be specified by a full path name. However,
253 -- we want the path to be stripped away.
254
255 for J in reverse File_Name'Range loop
256 if Is_Directory_Separator (File_Name (J)) then
257 Findex1 := J + 1;
258 exit;
259 end if;
260 end loop;
261
262 Findex2 := File_Name'Last;
263 while Findex2 > Findex1 and then File_Name (Findex2) /= '.' loop
264 Findex2 := Findex2 - 1;
265 end loop;
266
267 if Findex2 = Findex1 then
268 Findex2 := File_Name'Last + 1;
269 end if;
270
271 return File_Name (Findex1 .. Findex2 - 1);
272 end Base_Name;
273
274 -------------------------------
275 -- Check_Existing_Executable --
276 -------------------------------
277
278 procedure Check_Existing_Executable (File_Name : String) is
279 Ename : String := File_Name;
280 Efile : File_Name_Type;
281 Sfile : File_Name_Type;
282
283 begin
284 Canonical_Case_File_Name (Ename);
285 Name_Len := 0;
286 Add_Str_To_Name_Buffer (Ename);
287 Efile := Name_Find;
288
289 for J in Units.Table'First .. Units.Last loop
290 Sfile := Units.Table (J).Sfile;
291 if Sfile = Efile then
292 Exit_With_Error
293 ("executable name """ & File_Name & """ matches "
294 & "source file name """ & Get_Name_String (Sfile) & """");
295 end if;
296 end loop;
297
298 Delete (File_Name);
299 end Check_Existing_Executable;
300
301 ------------
302 -- Delete --
303 ------------
304
305 procedure Delete (Name : String) is
306 Status : int;
307 pragma Unreferenced (Status);
308 begin
309 Status := unlink (Name'Address);
310 -- Is it really right to ignore an error here ???
311 end Delete;
312
313 ---------------
314 -- Error_Msg --
315 ---------------
316
317 procedure Error_Msg (Message : String) is
318 begin
319 Write_Str (Base_Command_Name.all);
320 Write_Str (": ");
321 Write_Str (Message);
322 Write_Eol;
323 end Error_Msg;
324
325 ---------------------
326 -- Exit_With_Error --
327 ---------------------
328
329 procedure Exit_With_Error (Error : String) is
330 begin
331 Error_Msg (Error);
332 Exit_Program (E_Fatal);
333 end Exit_With_Error;
334
335 ------------------
336 -- Process_Args --
337 ------------------
338
339 procedure Process_Args is
340 Next_Arg : Integer;
341
342 Skip_Next : Boolean := False;
343 -- Set to true if the next argument is to be added into the list of
344 -- linker's argument without parsing it.
345
346 procedure Check_Version_And_Help is new Check_Version_And_Help_G (Usage);
347
348 -- Start of processing for Process_Args
349
350 begin
351 -- First, check for --version and --help
352
353 Check_Version_And_Help ("GNATLINK", "1996");
354
355 -- Loop through arguments of gnatlink command
356
357 Next_Arg := 1;
358 loop
359 exit when Next_Arg > Argument_Count;
360
361 Process_One_Arg : declare
362 Arg : constant String := Argument (Next_Arg);
363
364 begin
365 -- Case of argument which is a switch
366
367 -- We definitely need section by section comments here ???
368
369 if Skip_Next then
370
371 -- This argument must not be parsed, just add it to the
372 -- list of linker's options.
373
374 Skip_Next := False;
375
376 Linker_Options.Increment_Last;
377 Linker_Options.Table (Linker_Options.Last) :=
378 new String'(Arg);
379
380 elsif Arg'Length /= 0 and then Arg (1) = '-' then
381 if Arg'Length > 4 and then Arg (2 .. 5) = "gnat" then
382 Exit_With_Error
383 ("invalid switch: """ & Arg & """ (gnat not needed here)");
384 end if;
385
386 if Arg = "-Xlinker" then
387
388 -- Next argument should be sent directly to the linker.
389 -- We do not want to parse it here.
390
391 Skip_Next := True;
392
393 Linker_Options.Increment_Last;
394 Linker_Options.Table (Linker_Options.Last) :=
395 new String'(Arg);
396
397 elsif Arg (2) = 'g'
398 and then (Arg'Length < 5 or else Arg (2 .. 5) /= "gnat")
399 then
400 Debug_Flag_Present := True;
401
402 Linker_Options.Increment_Last;
403 Linker_Options.Table (Linker_Options.Last) :=
404 new String'(Arg);
405
406 Binder_Options.Increment_Last;
407 Binder_Options.Table (Binder_Options.Last) :=
408 Linker_Options.Table (Linker_Options.Last);
409
410 elsif Arg'Length >= 3 and then Arg (2) = 'M' then
411 declare
412 Switches : String_List_Access;
413
414 begin
415 Convert (Map_File, Arg (3 .. Arg'Last), Switches);
416
417 if Switches /= null then
418 for J in Switches'Range loop
419 Linker_Options.Increment_Last;
420 Linker_Options.Table (Linker_Options.Last) :=
421 Switches (J);
422 end loop;
423 end if;
424 end;
425
426 elsif Arg'Length = 2 then
427 case Arg (2) is
428 when 'f' =>
429 if Object_List_File_Supported then
430 Object_List_File_Required := True;
431 else
432 Exit_With_Error
433 ("Object list file not supported on this target");
434 end if;
435
436 when 'M' =>
437 Create_Map_File := True;
438
439 when 'n' =>
440 Compile_Bind_File := False;
441
442 when 'o' =>
443 Next_Arg := Next_Arg + 1;
444
445 if Next_Arg > Argument_Count then
446 Exit_With_Error ("Missing argument for -o");
447 end if;
448
449 Output_File_Name :=
450 new String'(Executable_Name
451 (Argument (Next_Arg),
452 Only_If_No_Suffix => True));
453
454 when 'P' =>
455 Opt.CodePeer_Mode := True;
456
457 when 'R' =>
458 Opt.Run_Path_Option := False;
459
460 when 'v' =>
461
462 -- Support "double" verbose mode. Second -v
463 -- gets sent to the linker and binder phases.
464
465 if Verbose_Mode then
466 Very_Verbose_Mode := True;
467
468 Linker_Options.Increment_Last;
469 Linker_Options.Table (Linker_Options.Last) :=
470 new String'(Arg);
471
472 Binder_Options.Increment_Last;
473 Binder_Options.Table (Binder_Options.Last) :=
474 Linker_Options.Table (Linker_Options.Last);
475
476 else
477 Verbose_Mode := True;
478
479 end if;
480
481 when others =>
482 Linker_Options.Increment_Last;
483 Linker_Options.Table (Linker_Options.Last) :=
484 new String'(Arg);
485
486 end case;
487
488 elsif Arg (2) = 'B' then
489 Linker_Options.Increment_Last;
490 Linker_Options.Table (Linker_Options.Last) :=
491 new String'(Arg);
492
493 Binder_Options.Increment_Last;
494 Binder_Options.Table (Binder_Options.Last) :=
495 Linker_Options.Table (Linker_Options.Last);
496
497 elsif Arg'Length >= 7 and then Arg (1 .. 7) = "--LINK=" then
498 if Arg'Length = 7 then
499 Exit_With_Error ("Missing argument for --LINK=");
500 end if;
501
502 declare
503 L_Args : constant Argument_List_Access :=
504 Argument_String_To_List (Arg (8 .. Arg'Last));
505 begin
506 -- The linker program is the first argument
507
508 Linker_Path :=
509 System.OS_Lib.Locate_Exec_On_Path (L_Args.all (1).all);
510
511 if Linker_Path = null then
512 Exit_With_Error
513 ("Could not locate linker: " & L_Args.all (1).all);
514 end if;
515
516 -- The other arguments are passed as-is to the linker and
517 -- override those coming from --GCC= if any.
518
519 if L_Args.all'Last >= 2 then
520 Gcc_Linker_Options.Set_Last (0);
521 end if;
522
523 for J in 2 .. L_Args.all'Last loop
524 Gcc_Linker_Options.Increment_Last;
525 Gcc_Linker_Options.Table
526 (Gcc_Linker_Options.Last) :=
527 new String'(L_Args.all (J).all);
528 end loop;
529 end;
530
531 elsif Arg'Length >= 6 and then Arg (1 .. 6) = "--GCC=" then
532 if Arg'Length = 6 then
533 Exit_With_Error ("Missing argument for --GCC=");
534 end if;
535
536 declare
537 Program_Args : constant Argument_List_Access :=
538 Argument_String_To_List
539 (Arg (7 .. Arg'Last));
540
541 begin
542 if Program_Args.all (1).all /= Gcc.all then
543 Gcc := new String'(Program_Args.all (1).all);
544 Standard_Gcc := False;
545 end if;
546
547 -- Set appropriate flags for switches passed
548
549 for J in 2 .. Program_Args.all'Last loop
550 declare
551 Arg : constant String := Program_Args.all (J).all;
552 AF : constant Integer := Arg'First;
553
554 begin
555 if Arg'Length /= 0 and then Arg (AF) = '-' then
556 if Arg (AF + 1) = 'g'
557 and then (Arg'Length = 2
558 or else Arg (AF + 2) in '0' .. '3'
559 or else Arg (AF + 2 .. Arg'Last) = "coff")
560 then
561 Debug_Flag_Present := True;
562 end if;
563 end if;
564
565 -- Add directory to source search dirs so that
566 -- Get_Target_Parameters can find system.ads
567
568 if Arg (AF .. AF + 1) = "-I"
569 and then Arg'Length > 2
570 then
571 Add_Src_Search_Dir (Arg (AF + 2 .. Arg'Last));
572 end if;
573
574 -- Pass to gcc for compiling binder generated file
575 -- No use passing libraries, it will just generate
576 -- a warning
577
578 if not (Arg (AF .. AF + 1) = "-l"
579 or else Arg (AF .. AF + 1) = "-L")
580 then
581 Binder_Options.Increment_Last;
582 Binder_Options.Table (Binder_Options.Last) :=
583 new String'(Arg);
584 end if;
585
586 -- Pass to gcc for linking program
587
588 Gcc_Linker_Options.Increment_Last;
589 Gcc_Linker_Options.Table
590 (Gcc_Linker_Options.Last) := new String'(Arg);
591 end;
592 end loop;
593 end;
594
595 -- Send all multi-character switches not recognized as
596 -- a special case by gnatlink to the linker/loader stage.
597
598 else
599 Linker_Options.Increment_Last;
600 Linker_Options.Table (Linker_Options.Last) :=
601 new String'(Arg);
602 end if;
603
604 -- Here if argument is a file name rather than a switch
605
606 else
607 -- If explicit ali file, capture it
608
609 if Arg'Length > 4
610 and then Arg (Arg'Last - 3 .. Arg'Last) = ".ali"
611 then
612 if Ali_File_Name = null then
613 Ali_File_Name := new String'(Arg);
614 else
615 Exit_With_Error ("cannot handle more than one ALI file");
616 end if;
617
618 -- If target object file, record object file
619
620 elsif Arg'Length > Get_Target_Object_Suffix.all'Length
621 and then Arg
622 (Arg'Last -
623 Get_Target_Object_Suffix.all'Length + 1 .. Arg'Last)
624 = Get_Target_Object_Suffix.all
625 then
626 Linker_Objects.Increment_Last;
627 Linker_Objects.Table (Linker_Objects.Last) :=
628 new String'(Arg);
629
630 -- If host object file, record object file
631
632 elsif Arg'Length > Get_Object_Suffix.all'Length
633 and then Arg
634 (Arg'Last - Get_Object_Suffix.all'Length + 1 .. Arg'Last)
635 = Get_Object_Suffix.all
636 then
637 Linker_Objects.Increment_Last;
638 Linker_Objects.Table (Linker_Objects.Last) :=
639 new String'(Arg);
640
641 -- If corresponding ali file exists, capture it
642
643 elsif Ali_File_Name = null
644 and then Is_Regular_File (Arg & ".ali")
645 then
646 Ali_File_Name := new String'(Arg & ".ali");
647
648 -- Otherwise assume this is a linker options entry, but
649 -- see below for interesting adjustment to this assumption.
650
651 else
652 Linker_Options.Increment_Last;
653 Linker_Options.Table (Linker_Options.Last) :=
654 new String'(Arg);
655 end if;
656 end if;
657 end Process_One_Arg;
658
659 Next_Arg := Next_Arg + 1;
660 end loop;
661
662 -- Compile the bind file with warnings suppressed, because
663 -- otherwise the with of the main program may cause junk warnings.
664
665 Binder_Options.Increment_Last;
666 Binder_Options.Table (Binder_Options.Last) := new String'("-gnatws");
667
668 -- If we did not get an ali file at all, and we had at least one
669 -- linker option, then assume that was the intended ali file after
670 -- all, so that we get a nicer message later on.
671
672 if Ali_File_Name = null
673 and then Linker_Options.Last >= Linker_Options.First
674 then
675 Ali_File_Name :=
676 new String'(Linker_Options.Table (Linker_Options.First).all
677 & ".ali");
678 end if;
679 end Process_Args;
680
681 -------------------------
682 -- Process_Binder_File --
683 -------------------------
684
685 procedure Process_Binder_File (Name : String) is
686 Fd : FILEs;
687 -- Binder file's descriptor
688
689 Link_Bytes : Integer := 0;
690 -- Projected number of bytes for the linker command line
691
692 Link_Max : Integer;
693 pragma Import (C, Link_Max, "__gnat_link_max");
694 -- Maximum number of bytes on the command line supported by the OS
695 -- linker. Passed this limit the response file mechanism must be used
696 -- if supported.
697
698 Next_Line : String (1 .. 1000);
699 -- Current line value
700
701 Nlast : Integer;
702 Nfirst : Integer;
703 -- Current line slice (the slice does not contain line terminator)
704
705 Last : Integer;
706 -- Current line last character for shared libraries (without version)
707
708 Objs_Begin : Integer := 0;
709 -- First object file index in Linker_Objects table
710
711 Objs_End : Integer := 0;
712 -- Last object file index in Linker_Objects table
713
714 Status : int;
715 pragma Warnings (Off, Status);
716 -- Used for various Interfaces.C_Streams calls
717
718 Closing_Status : Boolean;
719 pragma Warnings (Off, Closing_Status);
720 -- For call to Close
721
722 GNAT_Static : Boolean := False;
723 -- Save state of -static option
724
725 GNAT_Shared : Boolean := False;
726 -- Save state of -shared option
727
728 Xlinker_Was_Previous : Boolean := False;
729 -- Indicate that "-Xlinker" was the option preceding the current option.
730 -- If True, then the current option is never suppressed.
731
732 -- Rollback data
733
734 -- These data items are used to store current binder file context. The
735 -- context is composed of the file descriptor position and the current
736 -- line together with the slice indexes (first and last position) for
737 -- this line. The rollback data are used by the Store_File_Context and
738 -- Rollback_File_Context routines below. The file context mechanism
739 -- interact only with the Get_Next_Line call. For example:
740
741 -- Store_File_Context;
742 -- Get_Next_Line;
743 -- Rollback_File_Context;
744 -- Get_Next_Line;
745
746 -- Both Get_Next_Line calls above will read the exact same data from
747 -- the file. In other words, Next_Line, Nfirst and Nlast variables
748 -- will be set with the exact same values.
749
750 RB_File_Pos : long; -- File position
751 RB_Next_Line : String (1 .. 1000); -- Current line content
752 RB_Nlast : Integer; -- Slice last index
753 RB_Nfirst : Integer; -- Slice first index
754
755 Run_Path_Option_Ptr : Interfaces.C.Strings.chars_ptr;
756 pragma Import (C, Run_Path_Option_Ptr, "__gnat_run_path_option");
757 -- Pointer to string representing the native linker option which
758 -- specifies the path where the dynamic loader should find shared
759 -- libraries. Equal to null string if this system doesn't support it.
760
761 Libgcc_Subdir_Ptr : Interfaces.C.Strings.chars_ptr;
762 pragma Import (C, Libgcc_Subdir_Ptr, "__gnat_default_libgcc_subdir");
763 -- Pointer to string indicating the installation subdirectory where
764 -- a default shared libgcc might be found.
765
766 Object_Library_Ext_Ptr : Interfaces.C.Strings.chars_ptr;
767 pragma Import
768 (C, Object_Library_Ext_Ptr, "__gnat_object_library_extension");
769 -- Pointer to string specifying the default extension for
770 -- object libraries, e.g. Unix uses ".a".
771
772 Separate_Run_Path_Options : Boolean;
773 for Separate_Run_Path_Options'Size use Character'Size;
774 pragma Import
775 (C, Separate_Run_Path_Options, "__gnat_separate_run_path_options");
776 -- Whether separate rpath options should be emitted for each directory
777
778 procedure Get_Next_Line;
779 -- Read the next line from the binder file without the line
780 -- terminator.
781
782 function Index (S, Pattern : String) return Natural;
783 -- Return the last occurrence of Pattern in S, or 0 if none
784
785 procedure Store_File_Context;
786 -- Store current file context, Fd position and current line data.
787 -- The file context is stored into the rollback data above (RB_*).
788 -- Store_File_Context can be called at any time, only the last call
789 -- will be used (i.e. this routine overwrites the file context).
790
791 procedure Rollback_File_Context;
792 -- Restore file context from rollback data. This routine must be called
793 -- after Store_File_Context. The binder file context will be restored
794 -- with the data stored by the last Store_File_Context call.
795
796 procedure Write_RF (S : String);
797 -- Write a string to the response file and check if it was successful.
798 -- Fail the program if it was not successful (disk full).
799
800 -------------------
801 -- Get_Next_Line --
802 -------------------
803
804 procedure Get_Next_Line is
805 Fchars : chars;
806
807 begin
808 Fchars := fgets (Next_Line'Address, Next_Line'Length, Fd);
809
810 if Fchars = System.Null_Address then
811 Exit_With_Error ("Error reading binder output");
812 end if;
813
814 Nfirst := Next_Line'First;
815 Nlast := Nfirst;
816 while Nlast <= Next_Line'Last
817 and then Next_Line (Nlast) /= ASCII.LF
818 and then Next_Line (Nlast) /= ASCII.CR
819 loop
820 Nlast := Nlast + 1;
821 end loop;
822
823 Nlast := Nlast - 1;
824 end Get_Next_Line;
825
826 -----------
827 -- Index --
828 -----------
829
830 function Index (S, Pattern : String) return Natural is
831 Len : constant Natural := Pattern'Length;
832
833 begin
834 for J in reverse S'First .. S'Last - Len + 1 loop
835 if Pattern = S (J .. J + Len - 1) then
836 return J;
837 end if;
838 end loop;
839
840 return 0;
841 end Index;
842
843 ---------------------------
844 -- Rollback_File_Context --
845 ---------------------------
846
847 procedure Rollback_File_Context is
848 begin
849 Next_Line := RB_Next_Line;
850 Nfirst := RB_Nfirst;
851 Nlast := RB_Nlast;
852 Status := fseek (Fd, RB_File_Pos, Interfaces.C_Streams.SEEK_SET);
853
854 if Status = -1 then
855 Exit_With_Error ("Error setting file position");
856 end if;
857 end Rollback_File_Context;
858
859 ------------------------
860 -- Store_File_Context --
861 ------------------------
862
863 procedure Store_File_Context is
864 use type System.CRTL.long;
865
866 begin
867 RB_Next_Line := Next_Line;
868 RB_Nfirst := Nfirst;
869 RB_Nlast := Nlast;
870 RB_File_Pos := ftell (Fd);
871
872 if RB_File_Pos = -1 then
873 Exit_With_Error ("Error getting file position");
874 end if;
875 end Store_File_Context;
876
877 --------------
878 -- Write_RF --
879 --------------
880
881 procedure Write_RF (S : String) is
882 Success : Boolean := True;
883 Back_Slash : constant Character := '\';
884
885 begin
886 -- If a GNU response file is used, space and backslash need to be
887 -- escaped because they are interpreted as a string separator and
888 -- an escape character respectively by the underlying mechanism.
889 -- On the other hand, quote and double-quote are not escaped since
890 -- they are interpreted as string delimiters on both sides.
891
892 if Using_GNU_response_file then
893 for J in S'Range loop
894 if S (J) = ' ' or else S (J) = '\' then
895 if Write (Tname_FD, Back_Slash'Address, 1) /= 1 then
896 Success := False;
897 end if;
898 end if;
899
900 if Write (Tname_FD, S (J)'Address, 1) /= 1 then
901 Success := False;
902 end if;
903 end loop;
904
905 else
906 if Write (Tname_FD, S'Address, S'Length) /= S'Length then
907 Success := False;
908 end if;
909 end if;
910
911 if Write (Tname_FD, ASCII.LF'Address, 1) /= 1 then
912 Success := False;
913 end if;
914
915 if not Success then
916 Exit_With_Error ("Error generating response file: disk full");
917 end if;
918 end Write_RF;
919
920 -- Start of processing for Process_Binder_File
921
922 begin
923 Fd := fopen (Name'Address, Read_Mode'Address);
924
925 if Fd = NULL_Stream then
926 Exit_With_Error ("Failed to open binder output");
927 end if;
928
929 -- Skip up to the Begin Info line
930
931 loop
932 Get_Next_Line;
933 exit when Next_Line (Nfirst .. Nlast) = Begin_Info;
934 end loop;
935
936 loop
937 Get_Next_Line;
938
939 -- Go to end when end line is reached (this will happen in
940 -- High_Integrity_Mode where no -L switches are generated)
941
942 exit when Next_Line (Nfirst .. Nlast) = End_Info;
943
944 Next_Line (Nfirst .. Nlast - 8) := Next_Line (Nfirst + 8 .. Nlast);
945 Nlast := Nlast - 8;
946
947 -- Go to next section when switches are reached
948
949 exit when Next_Line (1) = '-';
950
951 -- Otherwise we have another object file to collect
952
953 Linker_Objects.Increment_Last;
954
955 -- Mark the positions of first and last object files in case they
956 -- need to be placed with a named file on systems having linker
957 -- line limitations.
958
959 if Objs_Begin = 0 then
960 Objs_Begin := Linker_Objects.Last;
961 end if;
962
963 Linker_Objects.Table (Linker_Objects.Last) :=
964 new String'(Next_Line (Nfirst .. Nlast));
965
966 -- Nlast - Nfirst + 1, for the size, plus one for the space between
967 -- each arguments.
968
969 Link_Bytes := Link_Bytes + Nlast - Nfirst + 2;
970 end loop;
971
972 Objs_End := Linker_Objects.Last;
973
974 -- Continue to compute the Link_Bytes, the linker options are part of
975 -- command line length.
976
977 Store_File_Context;
978
979 while Next_Line (Nfirst .. Nlast) /= End_Info loop
980 Link_Bytes := Link_Bytes + Nlast - Nfirst + 2;
981 Get_Next_Line;
982 end loop;
983
984 Rollback_File_Context;
985
986 -- On systems that have limitations on handling very long linker lines
987 -- we make use of the system linker option which takes a list of object
988 -- file names from a file instead of the command line itself. What we do
989 -- is to replace the list of object files by the special linker option
990 -- which then reads the object file list from a file instead. The option
991 -- to read from a file instead of the command line is only triggered if
992 -- a conservative threshold is passed.
993
994 if Object_List_File_Required
995 or else (Object_List_File_Supported
996 and then Link_Bytes > Link_Max)
997 then
998 -- Create a temporary file containing the Ada user object files
999 -- needed by the link. This list is taken from the bind file and is
1000 -- output one object per line for maximal compatibility with linkers
1001 -- supporting this option.
1002
1003 Create_Temp_File (Tname_FD, Tname);
1004
1005 -- ??? File descriptor should be checked to not be Invalid_FD.
1006 -- ??? Status of Write and Close operations should be checked, and
1007 -- failure should occur if a status is wrong.
1008
1009 for J in Objs_Begin .. Objs_End loop
1010 Write_RF (Linker_Objects.Table (J).all);
1011
1012 Response_File_Objects.Increment_Last;
1013 Response_File_Objects.Table (Response_File_Objects.Last) :=
1014 Linker_Objects.Table (J);
1015 end loop;
1016
1017 Close (Tname_FD, Closing_Status);
1018
1019 -- Add the special objects list file option together with the name
1020 -- of the temporary file (removing the null character) to the objects
1021 -- file table.
1022
1023 Linker_Objects.Table (Objs_Begin) :=
1024 new String'(Object_File_Option &
1025 Tname (Tname'First .. Tname'Last - 1));
1026
1027 -- The slots containing these object file names are then removed
1028 -- from the objects table so they do not appear in the link. They are
1029 -- removed by moving up the linker options and non-Ada object files
1030 -- appearing after the Ada object list in the table.
1031
1032 declare
1033 N : Integer;
1034
1035 begin
1036 N := Objs_End - Objs_Begin + 1;
1037
1038 for J in Objs_End + 1 .. Linker_Objects.Last loop
1039 Linker_Objects.Table (J - N + 1) := Linker_Objects.Table (J);
1040 end loop;
1041
1042 Linker_Objects.Set_Last (Linker_Objects.Last - N + 1);
1043 end;
1044 end if;
1045
1046 -- Process switches and options
1047
1048 if Next_Line (Nfirst .. Nlast) /= End_Info then
1049 Xlinker_Was_Previous := False;
1050
1051 loop
1052 if Xlinker_Was_Previous
1053 or else Next_Line (Nfirst .. Nlast) = "-Xlinker"
1054 then
1055 Linker_Options.Increment_Last;
1056 Linker_Options.Table (Linker_Options.Last) :=
1057 new String'(Next_Line (Nfirst .. Nlast));
1058
1059 elsif Next_Line (Nfirst .. Nlast) = "-static" then
1060 GNAT_Static := True;
1061
1062 elsif Next_Line (Nfirst .. Nlast) = "-shared" then
1063 GNAT_Shared := True;
1064
1065 -- Add binder options only if not already set on the command line.
1066 -- This rule is a way to control the linker options order.
1067
1068 else
1069 if Nlast > Nfirst + 2 and then
1070 Next_Line (Nfirst .. Nfirst + 1) = "-L"
1071 then
1072 -- Construct a library search path for use later to locate
1073 -- static gnatlib libraries.
1074
1075 if Libpath.Last > 1 then
1076 Libpath.Increment_Last;
1077 Libpath.Table (Libpath.Last) := Path_Separator;
1078 end if;
1079
1080 for I in Nfirst + 2 .. Nlast loop
1081 Libpath.Increment_Last;
1082 Libpath.Table (Libpath.Last) := Next_Line (I);
1083 end loop;
1084
1085 Linker_Options.Increment_Last;
1086
1087 Linker_Options.Table (Linker_Options.Last) :=
1088 new String'(Next_Line (Nfirst .. Nlast));
1089
1090 elsif Next_Line (Nfirst .. Nlast) = "-lgnarl"
1091 or else Next_Line (Nfirst .. Nlast) = "-lgnat"
1092 or else
1093 Next_Line
1094 (1 .. Natural'Min (Nlast, 8 + Library_Version'Length)) =
1095 Shared_Lib ("gnarl")
1096 or else
1097 Next_Line
1098 (1 .. Natural'Min (Nlast, 7 + Library_Version'Length)) =
1099 Shared_Lib ("gnat")
1100 then
1101 -- If it is a shared library, remove the library version.
1102 -- We will be looking for the static version of the library
1103 -- as it is in the same directory as the shared version.
1104
1105 if Next_Line (Nlast - Library_Version'Length + 1 .. Nlast) =
1106 Library_Version
1107 then
1108 -- Set Last to point to last character before the
1109 -- library version.
1110
1111 Last := Nlast - Library_Version'Length - 1;
1112 else
1113 Last := Nlast;
1114 end if;
1115
1116 -- Given a Gnat standard library, search the library path to
1117 -- find the library location.
1118
1119 -- Shouldn't we abstract a proc here, we are getting awfully
1120 -- heavily nested ???
1121
1122 declare
1123 File_Path : String_Access;
1124
1125 Object_Lib_Extension : constant String :=
1126 Value (Object_Library_Ext_Ptr);
1127
1128 File_Name : constant String := "lib" &
1129 Next_Line (Nfirst + 2 .. Last) & Object_Lib_Extension;
1130
1131 Run_Path_Opt : constant String :=
1132 Value (Run_Path_Option_Ptr);
1133
1134 GCC_Index : Natural;
1135 Run_Path_Opt_Index : Natural := 0;
1136
1137 begin
1138 File_Path :=
1139 Locate_Regular_File (File_Name,
1140 String (Libpath.Table (1 .. Libpath.Last)));
1141
1142 if File_Path /= null then
1143 if GNAT_Static then
1144
1145 -- If static gnatlib found, explicitly specify to
1146 -- overcome possible linker default usage of shared
1147 -- version.
1148
1149 Linker_Options.Increment_Last;
1150
1151 Linker_Options.Table (Linker_Options.Last) :=
1152 new String'(File_Path.all);
1153
1154 elsif GNAT_Shared then
1155 if Opt.Run_Path_Option then
1156
1157 -- If shared gnatlib desired, add appropriate
1158 -- system specific switch so that it can be
1159 -- located at runtime.
1160
1161 if Run_Path_Opt'Length /= 0 then
1162
1163 -- Output the system specific linker command
1164 -- that allows the image activator to find
1165 -- the shared library at runtime. Also add
1166 -- path to find libgcc_s.so, if relevant.
1167
1168 declare
1169 Path : String (1 .. File_Path'Length + 15);
1170
1171 Path_Last : constant Natural :=
1172 File_Path'Length;
1173
1174 begin
1175 Path (1 .. File_Path'Length) :=
1176 File_Path.all;
1177
1178 -- To find the location of the shared version
1179 -- of libgcc, we look for "gcc-lib" in the
1180 -- path of the library. However, this
1181 -- subdirectory is no longer present in
1182 -- recent versions of GCC. So, we look for
1183 -- the last subdirectory "lib" in the path.
1184
1185 GCC_Index :=
1186 Index (Path (1 .. Path_Last), "gcc-lib");
1187
1188 if GCC_Index /= 0 then
1189
1190 -- The shared version of libgcc is
1191 -- located in the parent directory.
1192
1193 GCC_Index := GCC_Index - 1;
1194
1195 else
1196 GCC_Index :=
1197 Index
1198 (Path (1 .. Path_Last),
1199 "/lib/");
1200
1201 if GCC_Index = 0 then
1202 GCC_Index :=
1203 Index (Path (1 .. Path_Last),
1204 Directory_Separator & "lib"
1205 & Directory_Separator);
1206 end if;
1207
1208 -- If we have found a "lib" subdir in
1209 -- the path to libgnat, the possible
1210 -- shared libgcc of interest by default
1211 -- is in libgcc_subdir at the same
1212 -- level.
1213
1214 if GCC_Index /= 0 then
1215 declare
1216 Subdir : constant String :=
1217 Value (Libgcc_Subdir_Ptr);
1218 begin
1219 Path
1220 (GCC_Index + 1 ..
1221 GCC_Index + Subdir'Length) :=
1222 Subdir;
1223 GCC_Index :=
1224 GCC_Index + Subdir'Length;
1225 end;
1226 end if;
1227 end if;
1228
1229 -- Look for an eventual run_path_option in
1230 -- the linker switches.
1231
1232 if Separate_Run_Path_Options then
1233 Linker_Options.Increment_Last;
1234 Linker_Options.Table
1235 (Linker_Options.Last) :=
1236 new String'
1237 (Run_Path_Opt
1238 & File_Path
1239 (1 .. File_Path'Length
1240 - File_Name'Length));
1241
1242 if GCC_Index /= 0 then
1243 Linker_Options.Increment_Last;
1244 Linker_Options.Table
1245 (Linker_Options.Last) :=
1246 new String'
1247 (Run_Path_Opt
1248 & Path (1 .. GCC_Index));
1249 end if;
1250
1251 else
1252 for J in reverse
1253 1 .. Linker_Options.Last
1254 loop
1255 if Linker_Options.Table (J) /= null
1256 and then
1257 Linker_Options.Table (J)'Length
1258 > Run_Path_Opt'Length
1259 and then
1260 Linker_Options.Table (J)
1261 (1 .. Run_Path_Opt'Length) =
1262 Run_Path_Opt
1263 then
1264 -- We have found an already
1265 -- specified run_path_option:
1266 -- we will add to this
1267 -- switch, because only one
1268 -- run_path_option should be
1269 -- specified.
1270
1271 Run_Path_Opt_Index := J;
1272 exit;
1273 end if;
1274 end loop;
1275
1276 -- If there is no run_path_option, we
1277 -- need to add one.
1278
1279 if Run_Path_Opt_Index = 0 then
1280 Linker_Options.Increment_Last;
1281 end if;
1282
1283 if GCC_Index = 0 then
1284 if Run_Path_Opt_Index = 0 then
1285 Linker_Options.Table
1286 (Linker_Options.Last) :=
1287 new String'
1288 (Run_Path_Opt
1289 & File_Path
1290 (1 .. File_Path'Length
1291 - File_Name'Length));
1292
1293 else
1294 Linker_Options.Table
1295 (Run_Path_Opt_Index) :=
1296 new String'
1297 (Linker_Options.Table
1298 (Run_Path_Opt_Index).all
1299 & Path_Separator
1300 & File_Path
1301 (1 .. File_Path'Length
1302 - File_Name'Length));
1303 end if;
1304
1305 else
1306 if Run_Path_Opt_Index = 0 then
1307 Linker_Options.Table
1308 (Linker_Options.Last) :=
1309 new String'
1310 (Run_Path_Opt
1311 & File_Path
1312 (1 .. File_Path'Length
1313 - File_Name'Length)
1314 & Path_Separator
1315 & Path (1 .. GCC_Index));
1316
1317 else
1318 Linker_Options.Table
1319 (Run_Path_Opt_Index) :=
1320 new String'
1321 (Linker_Options.Table
1322 (Run_Path_Opt_Index).all
1323 & Path_Separator
1324 & File_Path
1325 (1 .. File_Path'Length
1326 - File_Name'Length)
1327 & Path_Separator
1328 & Path (1 .. GCC_Index));
1329 end if;
1330 end if;
1331 end if;
1332 end;
1333 end if;
1334 end if;
1335
1336 -- Then we add the appropriate -l switch
1337
1338 Linker_Options.Increment_Last;
1339 Linker_Options.Table (Linker_Options.Last) :=
1340 new String'(Next_Line (Nfirst .. Nlast));
1341 end if;
1342
1343 else
1344 -- If gnatlib library not found, then add it anyway in
1345 -- case some other mechanism may find it.
1346
1347 Linker_Options.Increment_Last;
1348 Linker_Options.Table (Linker_Options.Last) :=
1349 new String'(Next_Line (Nfirst .. Nlast));
1350 end if;
1351 end;
1352 else
1353 Linker_Options.Increment_Last;
1354 Linker_Options.Table (Linker_Options.Last) :=
1355 new String'(Next_Line (Nfirst .. Nlast));
1356 end if;
1357 end if;
1358
1359 Xlinker_Was_Previous := Next_Line (Nfirst .. Nlast) = "-Xlinker";
1360
1361 Get_Next_Line;
1362 exit when Next_Line (Nfirst .. Nlast) = End_Info;
1363
1364 Next_Line (Nfirst .. Nlast - 8) := Next_Line (Nfirst + 8 .. Nlast);
1365 Nlast := Nlast - 8;
1366 end loop;
1367 end if;
1368
1369 -- If -shared was specified, invoke gcc with -shared-libgcc
1370
1371 if GNAT_Shared then
1372 Linker_Options.Increment_Last;
1373 Linker_Options.Table (Linker_Options.Last) := Shared_Libgcc;
1374 end if;
1375
1376 Status := fclose (Fd);
1377 end Process_Binder_File;
1378
1379 -----------
1380 -- Usage --
1381 -----------
1382
1383 procedure Usage is
1384 begin
1385 Write_Str ("Usage: ");
1386 Write_Str (Base_Command_Name.all);
1387 Write_Str (" switches mainprog.ali [non-Ada-objects] [linker-options]");
1388 Write_Eol;
1389 Write_Eol;
1390 Write_Line (" mainprog.ali the ALI file of the main program");
1391 Write_Eol;
1392 Write_Eol;
1393 Display_Usage_Version_And_Help;
1394 Write_Line (" -f Force object file list to be generated");
1395 Write_Line (" -g Compile binder source file with debug information");
1396 Write_Line (" -n Do not compile the binder source file");
1397 Write_Line (" -P Process files for use by CodePeer");
1398 Write_Line (" -R Do not use a run_path_option");
1399 Write_Line (" -v Verbose mode");
1400 Write_Line (" -v -v Very verbose mode");
1401 Write_Eol;
1402 Write_Line (" -o nam Use 'nam' as the name of the executable");
1403 Write_Line (" -Bdir Load compiler executables from dir");
1404
1405 if Is_Supported (Map_File) then
1406 Write_Line (" -Mmap Create map file map");
1407 Write_Line (" -M Create map file mainprog.map");
1408 end if;
1409
1410 Write_Line (" --GCC=comp Use 'comp' as the compiler rather than 'gcc'");
1411 Write_Line (" --LINK=lnk Use 'lnk' as the linker rather than 'gcc'");
1412 Write_Eol;
1413 Write_Line (" [non-Ada-objects] list of non Ada object files");
1414 Write_Line (" [linker-options] other options for the linker");
1415 end Usage;
1416
1417 ------------------
1418 -- Write_Header --
1419 ------------------
1420
1421 procedure Write_Header is
1422 begin
1423 if Verbose_Mode then
1424 Write_Eol;
1425 Display_Version ("GNATLINK", "1995");
1426 end if;
1427 end Write_Header;
1428
1429 -----------------
1430 -- Write_Usage --
1431 -----------------
1432
1433 procedure Write_Usage is
1434 begin
1435 Write_Header;
1436 Usage;
1437 end Write_Usage;
1438
1439 -- Start of processing for Gnatlink
1440
1441 begin
1442 -- Add the directory where gnatlink is invoked in front of the path, if
1443 -- gnatlink is invoked with directory information.
1444
1445 declare
1446 Command : constant String := Command_Name;
1447 begin
1448 for Index in reverse Command'Range loop
1449 if Command (Index) = Directory_Separator then
1450 declare
1451 Absolute_Dir : constant String :=
1452 Normalize_Pathname
1453 (Command (Command'First .. Index));
1454
1455 PATH : constant String :=
1456 Absolute_Dir &
1457 Path_Separator &
1458 Getenv ("PATH").all;
1459
1460 begin
1461 Setenv ("PATH", PATH);
1462 end;
1463
1464 exit;
1465 end if;
1466 end loop;
1467 end;
1468
1469 Base_Command_Name := new String'(Base_Name (Command_Name));
1470 Process_Args;
1471
1472 if Argument_Count = 0
1473 or else (Verbose_Mode and then Argument_Count = 1)
1474 then
1475 Write_Usage;
1476 Exit_Program (E_Fatal);
1477 end if;
1478
1479 -- Initialize packages to be used
1480
1481 Csets.Initialize;
1482 Snames.Initialize;
1483
1484 -- We always compile with -c
1485
1486 Binder_Options_From_ALI.Increment_Last;
1487 Binder_Options_From_ALI.Table (Binder_Options_From_ALI.Last) :=
1488 new String'("-c");
1489
1490 if Ali_File_Name = null then
1491 Exit_With_Error ("no ali file given for link");
1492 end if;
1493
1494 if not Is_Regular_File (Ali_File_Name.all) then
1495 Exit_With_Error (Ali_File_Name.all & " not found");
1496 end if;
1497
1498 -- Read the ALI file of the main subprogram if the binder generated file
1499 -- needs to be compiled and no --GCC= switch has been specified. Fetch the
1500 -- back end switches from this ALI file and use these switches to compile
1501 -- the binder generated file
1502
1503 if Compile_Bind_File and then Standard_Gcc then
1504 Initialize_ALI;
1505 Name_Len := Ali_File_Name'Length;
1506 Name_Buffer (1 .. Name_Len) := Ali_File_Name.all;
1507
1508 declare
1509 use Types;
1510 F : constant File_Name_Type := Name_Find;
1511 T : Text_Buffer_Ptr;
1512 A : ALI_Id;
1513
1514 begin
1515 -- Load the ALI file
1516
1517 T := Read_Library_Info (F, True);
1518
1519 -- Read it. Note that we ignore errors, since we only want very
1520 -- limited information from the ali file, and likely a slightly
1521 -- wrong version will be just fine, though in normal operation
1522 -- we don't expect this to happen.
1523
1524 A := Scan_ALI
1525 (F,
1526 T,
1527 Ignore_ED => False,
1528 Err => False,
1529 Ignore_Errors => True);
1530
1531 if A /= No_ALI_Id then
1532 for
1533 Index in Units.Table (ALIs.Table (A).First_Unit).First_Arg ..
1534 Units.Table (ALIs.Table (A).First_Unit).Last_Arg
1535 loop
1536 -- Do not compile with the front end switches. However, --RTS
1537 -- is to be dealt with specially because it needs to be passed
1538 -- to compile the file generated by the binder.
1539
1540 declare
1541 Arg : String_Ptr renames Args.Table (Index);
1542 begin
1543 if not Is_Front_End_Switch (Arg.all) then
1544 Binder_Options_From_ALI.Increment_Last;
1545 Binder_Options_From_ALI.Table
1546 (Binder_Options_From_ALI.Last) := String_Access (Arg);
1547
1548 -- GNAT doesn't support GCC's multilib mechanism when it
1549 -- is configured with --disable-libada. This means that,
1550 -- when a multilib switch is used to request a particular
1551 -- compilation mode, the corresponding --RTS switch must
1552 -- also be specified. It is convenient to eliminate the
1553 -- redundancy by keying the compilation mode on a single
1554 -- switch, namely --RTS, and have the compiler reinstate
1555 -- the multilib switch (see gcc-interface/lang-specs.h).
1556 -- This switch must be passed to the driver at link time.
1557
1558 if Arg'Length = 5
1559 and then Arg (Arg'First + 1 .. Arg'First + 4) = "mrtp"
1560 then
1561 Linker_Options.Increment_Last;
1562 Linker_Options.Table
1563 (Linker_Options.Last) := String_Access (Arg);
1564 end if;
1565
1566 elsif Arg'Length > 5
1567 and then Arg (Arg'First + 2 .. Arg'First + 5) = "RTS="
1568 then
1569 Binder_Options_From_ALI.Increment_Last;
1570 Binder_Options_From_ALI.Table
1571 (Binder_Options_From_ALI.Last) := String_Access (Arg);
1572
1573 -- Set the RTS_*_Path_Name variables, so that
1574 -- the correct directories will be set when
1575 -- Osint.Add_Default_Search_Dirs will be called later.
1576
1577 Opt.RTS_Src_Path_Name :=
1578 Get_RTS_Search_Dir
1579 (Arg (Arg'First + 6 .. Arg'Last), Include);
1580
1581 Opt.RTS_Lib_Path_Name :=
1582 Get_RTS_Search_Dir
1583 (Arg (Arg'First + 6 .. Arg'Last), Objects);
1584 end if;
1585 end;
1586 end loop;
1587 end if;
1588 end;
1589 end if;
1590
1591 -- Get target parameters
1592
1593 Osint.Add_Default_Search_Dirs;
1594 Targparm.Get_Target_Parameters;
1595
1596 -- Compile the bind file with the following switches:
1597
1598 -- -gnatA stops reading gnat.adc, since we don't know what
1599 -- pragmas would work, and we do not need it anyway.
1600
1601 -- -gnatWb allows brackets coding for wide characters
1602
1603 -- -gnatiw allows wide characters in identifiers. This is needed
1604 -- because bindgen uses brackets encoding for all upper
1605 -- half and wide characters in identifier names.
1606
1607 -- In addition, in CodePeer mode compile with -x adascil -gnatcC
1608
1609 Binder_Options_From_ALI.Increment_Last;
1610 Binder_Options_From_ALI.Table (Binder_Options_From_ALI.Last) :=
1611 new String'("-gnatA");
1612 Binder_Options_From_ALI.Increment_Last;
1613 Binder_Options_From_ALI.Table (Binder_Options_From_ALI.Last) :=
1614 new String'("-gnatWb");
1615 Binder_Options_From_ALI.Increment_Last;
1616 Binder_Options_From_ALI.Table (Binder_Options_From_ALI.Last) :=
1617 new String'("-gnatiw");
1618
1619 if Opt.CodePeer_Mode then
1620 Binder_Options_From_ALI.Increment_Last;
1621 Binder_Options_From_ALI.Table (Binder_Options_From_ALI.Last) :=
1622 new String'("-x");
1623 Binder_Options_From_ALI.Increment_Last;
1624 Binder_Options_From_ALI.Table (Binder_Options_From_ALI.Last) :=
1625 new String'("adascil");
1626 Binder_Options_From_ALI.Increment_Last;
1627 Binder_Options_From_ALI.Table (Binder_Options_From_ALI.Last) :=
1628 new String'("-gnatcC");
1629 end if;
1630
1631 -- Locate all the necessary programs and verify required files are present
1632
1633 Gcc_Path := System.OS_Lib.Locate_Exec_On_Path (Gcc.all);
1634
1635 if Gcc_Path = null then
1636 Exit_With_Error ("Couldn't locate " & Gcc.all);
1637 end if;
1638
1639 if Linker_Path = null then
1640 Linker_Path := Gcc_Path;
1641 end if;
1642
1643 Write_Header;
1644
1645 Target_Debuggable_Suffix := Get_Target_Debuggable_Suffix;
1646
1647 -- If no output name specified, then use the base name of .ali file name
1648
1649 if Output_File_Name = null then
1650 Output_File_Name :=
1651 new String'(Base_Name (Ali_File_Name.all)
1652 & Target_Debuggable_Suffix.all);
1653 end if;
1654
1655 Linker_Options.Increment_Last;
1656 Linker_Options.Table (Linker_Options.Last) := new String'("-o");
1657
1658 Linker_Options.Increment_Last;
1659 Linker_Options.Table (Linker_Options.Last) :=
1660 new String'(Output_File_Name.all);
1661
1662 Check_Existing_Executable (Output_File_Name.all);
1663
1664 -- Warn if main program is called "test", as that may be a built-in command
1665 -- on Unix. On non-Unix systems executables have a suffix, so the warning
1666 -- will not appear. However, do not warn in the case of a cross compiler.
1667
1668 -- Assume this is a cross tool if the executable name is not gnatlink.
1669 -- Note that the executable name is also gnatlink on windows, but in that
1670 -- case the output file name will be test.exe rather than test.
1671
1672 if Base_Command_Name.all = "gnatlink"
1673 and then Output_File_Name.all = "test"
1674 then
1675 Error_Msg ("warning: executable name """ & Output_File_Name.all
1676 & """ may conflict with shell command");
1677 end if;
1678
1679 -- Special warnings for worrisome file names on windows
1680
1681 -- Recent versions of Windows by default cause privilege escalation if an
1682 -- executable file name contains substrings "install", "setup", "update"
1683 -- or "patch". A console application will typically fail to load as a
1684 -- result, so we should warn the user.
1685
1686 Bad_File_Names_On_Windows : declare
1687 FN : String := Output_File_Name.all;
1688
1689 procedure Check_File_Name (S : String);
1690 -- Warn if file name has the substring S
1691
1692 procedure Check_File_Name (S : String) is
1693 begin
1694 for J in 1 .. FN'Length - (S'Length - 1) loop
1695 if FN (J .. J + (S'Length - 1)) = S then
1696 Error_Msg
1697 ("warning: executable file name """ & Output_File_Name.all
1698 & """ contains substring """ & S & '"');
1699 Error_Msg
1700 ("admin privileges may be required to run this file");
1701 end if;
1702 end loop;
1703 end Check_File_Name;
1704
1705 -- Start of processing for Bad_File_Names_On_Windows
1706
1707 begin
1708 for J in FN'Range loop
1709 FN (J) := Csets.Fold_Lower (FN (J));
1710 end loop;
1711
1712 -- For now we detect Windows by its executable suffix of .exe
1713
1714 if Target_Debuggable_Suffix.all = ".exe" then
1715 Check_File_Name ("install");
1716 Check_File_Name ("setup");
1717 Check_File_Name ("update");
1718 Check_File_Name ("patch");
1719 end if;
1720 end Bad_File_Names_On_Windows;
1721
1722 -- If -M switch was specified, add the switches to create the map file
1723
1724 if Create_Map_File then
1725 declare
1726 Map_Name : constant String := Base_Name (Ali_File_Name.all) & ".map";
1727 Switches : String_List_Access;
1728
1729 begin
1730 Convert (Map_File, Map_Name, Switches);
1731
1732 if Switches /= null then
1733 for J in Switches'Range loop
1734 Linker_Options.Increment_Last;
1735 Linker_Options.Table (Linker_Options.Last) := Switches (J);
1736 end loop;
1737 end if;
1738 end;
1739 end if;
1740
1741 -- Perform consistency checks
1742
1743 -- Transform the .ali file name into the binder output file name
1744
1745 Make_Binder_File_Names : declare
1746 Fname : constant String := Base_Name (Ali_File_Name.all);
1747 Fname_Len : Integer := Fname'Length;
1748
1749 function Get_Maximum_File_Name_Length return Integer;
1750 pragma Import (C, Get_Maximum_File_Name_Length,
1751 "__gnat_get_maximum_file_name_length");
1752
1753 Maximum_File_Name_Length : constant Integer :=
1754 Get_Maximum_File_Name_Length;
1755
1756 Bind_File_Prefix : Types.String_Ptr;
1757 -- Contains prefix used for bind files
1758
1759 begin
1760 -- Set prefix
1761
1762 Bind_File_Prefix := new String'("b~");
1763
1764 -- If the length of the binder file becomes too long due to
1765 -- the addition of the "b?" prefix, then truncate it.
1766
1767 if Maximum_File_Name_Length > 0 then
1768 while Fname_Len >
1769 Maximum_File_Name_Length - Bind_File_Prefix.all'Length
1770 loop
1771 Fname_Len := Fname_Len - 1;
1772 end loop;
1773 end if;
1774
1775 declare
1776 Fnam : constant String :=
1777 Bind_File_Prefix.all &
1778 Fname (Fname'First .. Fname'First + Fname_Len - 1);
1779
1780 begin
1781 Binder_Spec_Src_File := new String'(Fnam & ".ads");
1782 Binder_Body_Src_File := new String'(Fnam & ".adb");
1783 Binder_Ali_File := new String'(Fnam & ".ali");
1784
1785 Binder_Obj_File := new String'(Fnam & Get_Target_Object_Suffix.all);
1786 end;
1787
1788 if Fname_Len /= Fname'Length then
1789 Binder_Options.Increment_Last;
1790 Binder_Options.Table (Binder_Options.Last) := new String'("-o");
1791 Binder_Options.Increment_Last;
1792 Binder_Options.Table (Binder_Options.Last) := Binder_Obj_File;
1793 end if;
1794 end Make_Binder_File_Names;
1795
1796 Process_Binder_File (Binder_Body_Src_File.all & ASCII.NUL);
1797
1798 -- Compile the binder file. This is fast, so we always do it, unless
1799 -- specifically told not to by the -n switch
1800
1801 if Compile_Bind_File then
1802 Bind_Step : declare
1803 Success : Boolean;
1804
1805 Args : Argument_List
1806 (1 .. Binder_Options_From_ALI.Last + Binder_Options.Last + 1);
1807
1808 begin
1809 for J in 1 .. Binder_Options_From_ALI.Last loop
1810 Args (J) := Binder_Options_From_ALI.Table (J);
1811 end loop;
1812
1813 for J in 1 .. Binder_Options.Last loop
1814 Args (Binder_Options_From_ALI.Last + J) :=
1815 Binder_Options.Table (J);
1816 end loop;
1817
1818 -- Use the full path of the binder generated source, so that it is
1819 -- guaranteed that the debugger will find this source, even with
1820 -- STABS.
1821
1822 Args (Args'Last) :=
1823 new String'(Normalize_Pathname (Binder_Body_Src_File.all));
1824
1825 if Verbose_Mode then
1826 Write_Str (Base_Name (Gcc_Path.all));
1827
1828 for J in Args'Range loop
1829 Write_Str (" ");
1830 Write_Str (Args (J).all);
1831 end loop;
1832
1833 Write_Eol;
1834 end if;
1835
1836 System.OS_Lib.Spawn (Gcc_Path.all, Args, Success);
1837
1838 if not Success then
1839 Exit_Program (E_Fatal);
1840 end if;
1841 end Bind_Step;
1842 end if;
1843
1844 -- In CodePeer mode, there's nothing left to do after the binder file has
1845 -- been compiled.
1846
1847 if Opt.CodePeer_Mode then
1848 if Tname_FD /= Invalid_FD then
1849 Delete (Tname);
1850 end if;
1851
1852 return;
1853 end if;
1854
1855 -- Now, actually link the program
1856
1857 Link_Step : declare
1858 Num_Args : Natural :=
1859 (Linker_Options.Last - Linker_Options.First + 1) +
1860 (Gcc_Linker_Options.Last - Gcc_Linker_Options.First + 1) +
1861 (Linker_Objects.Last - Linker_Objects.First + 1);
1862 Stack_Op : Boolean := False;
1863
1864 begin
1865 -- Remove duplicate stack size setting from the Linker_Options table.
1866 -- The stack setting option "-Xlinker --stack=R,C" can be found
1867 -- in one line when set by a pragma Linker_Options or in two lines
1868 -- ("-Xlinker" then "--stack=R,C") when set on the command line. We
1869 -- also check for the "-Wl,--stack=R" style option.
1870
1871 -- We must remove the second stack setting option instance because
1872 -- the one on the command line will always be the first one. And any
1873 -- subsequent stack setting option will overwrite the previous one.
1874 -- This is done especially for GNAT/NT where we set the stack size
1875 -- for tasking programs by a pragma in the NT specific tasking
1876 -- package System.Task_Primitives.Operations.
1877
1878 -- Note: This is not a FOR loop that runs from Linker_Options.First
1879 -- to Linker_Options.Last, since operations within the loop can
1880 -- modify the length of the table.
1881
1882 Clean_Link_Option_Set : declare
1883 J : Natural;
1884 Shared_Libgcc_Seen : Boolean := False;
1885
1886 begin
1887 J := Linker_Options.First;
1888 while J <= Linker_Options.Last loop
1889 if Linker_Options.Table (J).all = "-Xlinker"
1890 and then J < Linker_Options.Last
1891 and then Linker_Options.Table (J + 1)'Length > 8
1892 and then Linker_Options.Table (J + 1) (1 .. 8) = "--stack="
1893 then
1894 if Stack_Op then
1895 Linker_Options.Table (J .. Linker_Options.Last - 2) :=
1896 Linker_Options.Table (J + 2 .. Linker_Options.Last);
1897 Linker_Options.Decrement_Last;
1898 Linker_Options.Decrement_Last;
1899 Num_Args := Num_Args - 2;
1900
1901 else
1902 Stack_Op := True;
1903 end if;
1904 end if;
1905
1906 -- Remove duplicate -shared-libgcc switch
1907
1908 if Linker_Options.Table (J).all = Shared_Libgcc_String then
1909 if Shared_Libgcc_Seen then
1910 Linker_Options.Table (J .. Linker_Options.Last - 1) :=
1911 Linker_Options.Table (J + 1 .. Linker_Options.Last);
1912 Linker_Options.Decrement_Last;
1913 Num_Args := Num_Args - 1;
1914
1915 else
1916 Shared_Libgcc_Seen := True;
1917 end if;
1918 end if;
1919
1920 -- Here we just check for a canonical form that matches the
1921 -- pragma Linker_Options set in the NT runtime.
1922
1923 if (Linker_Options.Table (J)'Length > 17
1924 and then Linker_Options.Table (J) (1 .. 17) =
1925 "-Xlinker --stack=")
1926 or else
1927 (Linker_Options.Table (J)'Length > 12
1928 and then Linker_Options.Table (J) (1 .. 12) =
1929 "-Wl,--stack=")
1930 then
1931 if Stack_Op then
1932 Linker_Options.Table (J .. Linker_Options.Last - 1) :=
1933 Linker_Options.Table (J + 1 .. Linker_Options.Last);
1934 Linker_Options.Decrement_Last;
1935 Num_Args := Num_Args - 1;
1936
1937 else
1938 Stack_Op := True;
1939 end if;
1940 end if;
1941
1942 J := J + 1;
1943 end loop;
1944
1945 if Linker_Path = Gcc_Path then
1946
1947 -- For systems where the default is to link statically with
1948 -- libgcc, if gcc is not called with -shared-libgcc, call it
1949 -- with -static-libgcc, as there are some platforms where one
1950 -- of these two switches is compulsory to link.
1951
1952 if Shared_Libgcc_Default = 'T'
1953 and then not Shared_Libgcc_Seen
1954 then
1955 Linker_Options.Increment_Last;
1956 Linker_Options.Table (Linker_Options.Last) := Static_Libgcc;
1957 Num_Args := Num_Args + 1;
1958 end if;
1959 end if;
1960 end Clean_Link_Option_Set;
1961
1962 -- Prepare arguments for call to linker
1963
1964 Call_Linker : declare
1965 Success : Boolean;
1966 Args : Argument_List (1 .. Num_Args + 1);
1967 Index : Integer := Args'First;
1968
1969 begin
1970 Args (Index) := Binder_Obj_File;
1971
1972 -- Add the object files and any -largs libraries
1973
1974 for J in Linker_Objects.First .. Linker_Objects.Last loop
1975 Index := Index + 1;
1976 Args (Index) := Linker_Objects.Table (J);
1977 end loop;
1978
1979 -- Add the linker options from the binder file
1980
1981 for J in Linker_Options.First .. Linker_Options.Last loop
1982 Index := Index + 1;
1983 Args (Index) := Linker_Options.Table (J);
1984 end loop;
1985
1986 -- Finally add the libraries from the --GCC= switch
1987
1988 for J in Gcc_Linker_Options.First .. Gcc_Linker_Options.Last loop
1989 Index := Index + 1;
1990 Args (Index) := Gcc_Linker_Options.Table (J);
1991 end loop;
1992
1993 if Verbose_Mode then
1994 Write_Str (Linker_Path.all);
1995
1996 for J in Args'Range loop
1997 Write_Str (" ");
1998 Write_Str (Args (J).all);
1999 end loop;
2000
2001 Write_Eol;
2002
2003 -- If we are on very verbose mode (-v -v) and a response file
2004 -- is used we display its content.
2005
2006 if Very_Verbose_Mode and then Tname_FD /= Invalid_FD then
2007 Write_Eol;
2008 Write_Str ("Response file (" &
2009 Tname (Tname'First .. Tname'Last - 1) &
2010 ") content : ");
2011 Write_Eol;
2012
2013 for J in
2014 Response_File_Objects.First .. Response_File_Objects.Last
2015 loop
2016 Write_Str (Response_File_Objects.Table (J).all);
2017 Write_Eol;
2018 end loop;
2019
2020 Write_Eol;
2021 end if;
2022 end if;
2023
2024 System.OS_Lib.Spawn (Linker_Path.all, Args, Success);
2025
2026 -- Delete the temporary file used in conjunction with linking if one
2027 -- was created. See Process_Bind_File for details.
2028
2029 if Tname_FD /= Invalid_FD then
2030 Delete (Tname);
2031 end if;
2032
2033 if not Success then
2034 Error_Msg ("error when calling " & Linker_Path.all);
2035 Exit_Program (E_Fatal);
2036 end if;
2037 end Call_Linker;
2038 end Link_Step;
2039
2040 -- Only keep the binder output file and it's associated object
2041 -- file if compiling with the -g option. These files are only
2042 -- useful if debugging.
2043
2044 if not Debug_Flag_Present then
2045 Delete (Binder_Ali_File.all & ASCII.NUL);
2046 Delete (Binder_Spec_Src_File.all & ASCII.NUL);
2047 Delete (Binder_Body_Src_File.all & ASCII.NUL);
2048 Delete (Binder_Obj_File.all & ASCII.NUL);
2049 end if;
2050
2051 Exit_Program (E_Success);
2052
2053 exception
2054 when X : others =>
2055 Write_Line (Exception_Information (X));
2056 Exit_With_Error ("INTERNAL ERROR. Please report");
2057 end Gnatlink;
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