1 ------------------------------------------------------------------------------
3 -- GNAT COMPILER COMPONENTS --
9 -- Copyright (C) 1996-2007, Free Software Foundation, Inc. --
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. --
21 -- GNAT was originally developed by the GNAT team at New York University. --
22 -- Extensive contributions were provided by Ada Core Technologies Inc. --
24 ------------------------------------------------------------------------------
26 -- Gnatlink usage: please consult the gnat documentation
30 with Gnatvsn; use Gnatvsn;
32 with Indepsw; use Indepsw;
33 with Namet; use Namet;
35 with Osint; use Osint;
36 with Output; use Output;
38 with Switch; use Switch;
39 with System; use System;
41 with Targparm; use Targparm;
44 with Ada.Command_Line; use Ada.Command_Line;
45 with Ada.Exceptions; use Ada.Exceptions;
47 with System.OS_Lib; use System.OS_Lib;
50 with Interfaces.C_Streams; use Interfaces.C_Streams;
51 with Interfaces.C.Strings; use Interfaces.C.Strings;
54 pragma Ident (Gnatvsn.Gnat_Static_Version_String);
56 Shared_Libgcc_String : constant String := "-shared-libgcc";
57 Shared_Libgcc : constant String_Access :=
58 new String'(Shared_Libgcc_String);
59 -- Used to invoke gcc when the binder is invoked with -shared
61 Static_Libgcc_String : constant String := "-static-libgcc";
62 Static_Libgcc : constant String_Access :=
63 new String'(Static_Libgcc_String);
64 -- Used to invoke gcc when shared libs are not used
66 package Gcc_Linker_Options is new Table.Table (
67 Table_Component_Type => String_Access,
68 Table_Index_Type => Integer,
71 Table_Increment => 100,
72 Table_Name => "Gnatlink.Gcc_Linker_Options");
73 -- Comments needed ???
75 package Libpath is new Table.Table (
76 Table_Component_Type => Character,
77 Table_Index_Type => Integer,
79 Table_Initial => 4096,
80 Table_Increment => 100,
81 Table_Name => "Gnatlink.Libpath");
82 -- Comments needed ???
84 package Linker_Options is new Table.Table (
85 Table_Component_Type => String_Access,
86 Table_Index_Type => Integer,
89 Table_Increment => 100,
90 Table_Name => "Gnatlink.Linker_Options");
91 -- Comments needed ???
93 package Linker_Objects is new Table.Table (
94 Table_Component_Type => String_Access,
95 Table_Index_Type => Integer,
98 Table_Increment => 100,
99 Table_Name => "Gnatlink.Linker_Objects");
100 -- This table collects the objects file to be passed to the linker. In the
101 -- case where the linker command line is too long then programs objects
102 -- are put on the Response_File_Objects table. Note that the binder object
103 -- file and the user's objects remain in this table. This is very
104 -- important because on the GNU linker command line the -L switch is not
105 -- used to look for objects files but -L switch is used to look for
106 -- objects listed in the response file. This is not a problem with the
107 -- applications objects as they are specified with a full name.
109 package Response_File_Objects is new Table.Table (
110 Table_Component_Type => String_Access,
111 Table_Index_Type => Integer,
112 Table_Low_Bound => 1,
114 Table_Increment => 100,
115 Table_Name => "Gnatlink.Response_File_Objects");
116 -- This table collects the objects file that are to be put in the response
117 -- file. Only application objects are collected there (see details in
118 -- Linker_Objects table comments)
120 package Binder_Options_From_ALI is new Table.Table (
121 Table_Component_Type => String_Access,
122 Table_Index_Type => Integer,
123 Table_Low_Bound => 1, -- equals low bound of Argument_List for Spawn
125 Table_Increment => 100,
126 Table_Name => "Gnatlink.Binder_Options_From_ALI");
127 -- This table collects the switches from the ALI file of the main
130 package Binder_Options is new Table.Table (
131 Table_Component_Type => String_Access,
132 Table_Index_Type => Integer,
133 Table_Low_Bound => 1, -- equals low bound of Argument_List for Spawn
135 Table_Increment => 100,
136 Table_Name => "Gnatlink.Binder_Options");
137 -- This table collects the arguments to be passed to compile the binder
140 Gcc : String_Access := Program_Name ("gcc");
142 Read_Mode : constant String := "r" & ASCII.Nul;
144 Begin_Info : String := "-- BEGIN Object file/option list";
145 End_Info : String := "-- END Object file/option list ";
146 -- Note: above lines are modified in C mode, see option processing
148 Gcc_Path : String_Access;
149 Linker_Path : String_Access;
151 Output_File_Name : String_Access;
152 Ali_File_Name : String_Access;
153 Binder_Spec_Src_File : String_Access;
154 Binder_Body_Src_File : String_Access;
155 Binder_Ali_File : String_Access;
156 Binder_Obj_File : String_Access;
158 Tname : Temp_File_Name;
159 Tname_FD : File_Descriptor := Invalid_FD;
160 -- Temporary file used by linker to pass list of object files on
161 -- certain systems with limitations on size of arguments.
163 Debug_Flag_Present : Boolean := False;
164 Verbose_Mode : Boolean := False;
165 Very_Verbose_Mode : Boolean := False;
167 Ada_Bind_File : Boolean := True;
168 -- Set to True if bind file is generated in Ada
170 Standard_Gcc : Boolean := True;
172 Compile_Bind_File : Boolean := True;
173 -- Set to False if bind file is not to be compiled
175 Create_Map_File : Boolean := False;
176 -- Set to True by switch -M. The map file name is derived from
177 -- the ALI file name (mainprog.ali => mainprog.map).
179 Object_List_File_Supported : Boolean;
180 for Object_List_File_Supported'Size use Character'Size;
182 (C, Object_List_File_Supported, "__gnat_objlist_file_supported");
183 -- Predicate indicating whether the linker has an option whereby the
184 -- names of object files can be passed to the linker in a file.
186 Object_List_File_Required : Boolean := False;
187 -- Set to True to force generation of a response file
189 function Base_Name (File_Name : String) return String;
190 -- Return just the file name part without the extension (if present)
192 procedure Delete (Name : String);
193 -- Wrapper to unlink as status is ignored by this application
195 procedure Error_Msg (Message : String);
196 -- Output the error or warning Message
198 procedure Exit_With_Error (Error : String);
199 -- Output Error and exit program with a fatal condition
201 procedure Process_Args;
202 -- Go through all the arguments and build option tables
204 procedure Process_Binder_File (Name : String);
205 -- Reads the binder file and extracts linker arguments
210 procedure Write_Header;
211 -- Show user the program name, version and copyright
213 procedure Write_Usage;
214 -- Show user the program options
220 function Base_Name (File_Name : String) return String is
225 Findex1 := File_Name'First;
227 -- The file might be specified by a full path name. However,
228 -- we want the path to be stripped away.
230 for J in reverse File_Name'Range loop
231 if Is_Directory_Separator (File_Name (J)) then
237 Findex2 := File_Name'Last;
238 while Findex2 > Findex1
239 and then File_Name (Findex2) /= '.'
241 Findex2 := Findex2 - 1;
244 if Findex2 = Findex1 then
245 Findex2 := File_Name'Last + 1;
248 return File_Name (Findex1 .. Findex2 - 1);
255 procedure Delete (Name : String) is
257 pragma Unreferenced (Status);
259 Status := unlink (Name'Address);
260 -- Is it really right to ignore an error here ???
267 procedure Error_Msg (Message : String) is
269 Write_Str (Base_Name (Command_Name));
275 ---------------------
276 -- Exit_With_Error --
277 ---------------------
279 procedure Exit_With_Error (Error : String) is
282 Exit_Program (E_Fatal);
289 procedure Process_Args is
291 Skip_Next : Boolean := False;
292 -- Set to true if the next argument is to be added into the list of
293 -- linker's argument without parsing it.
295 procedure Check_Version_And_Help is new Check_Version_And_Help_G (Usage);
297 -- Start of processing for Process_Args
300 -- First, check for --version and --help
302 Check_Version_And_Help ("GNATLINK", "1995");
304 -- Loop through arguments of gnatlink command
308 exit when Next_Arg > Argument_Count;
310 Process_One_Arg : declare
311 Arg : constant String := Argument (Next_Arg);
314 -- Case of argument which is a switch
316 -- We definitely need section by section comments here ???
320 -- This argument must not be parsed, just add it to the
321 -- list of linker's options.
325 Linker_Options.Increment_Last;
326 Linker_Options.Table (Linker_Options.Last) :=
329 elsif Arg'Length /= 0 and then Arg (1) = '-' then
330 if Arg'Length > 4 and then Arg (2 .. 5) = "gnat" then
332 ("invalid switch: """ & Arg & """ (gnat not needed here)");
335 if Arg = "-Xlinker" then
337 -- Next argument should be sent directly to the linker.
338 -- We do not want to parse it here.
342 Linker_Options.Increment_Last;
343 Linker_Options.Table (Linker_Options.Last) :=
347 and then (Arg'Length < 5 or else Arg (2 .. 5) /= "gnat")
349 Debug_Flag_Present := True;
351 Linker_Options.Increment_Last;
352 Linker_Options.Table (Linker_Options.Last) :=
355 Binder_Options.Increment_Last;
356 Binder_Options.Table (Binder_Options.Last) :=
357 Linker_Options.Table (Linker_Options.Last);
359 elsif Arg'Length >= 3 and then Arg (2) = 'M' then
361 Switches : String_List_Access;
364 Convert (Map_File, Arg (3 .. Arg'Last), Switches);
366 if Switches /= null then
367 for J in Switches'Range loop
368 Linker_Options.Increment_Last;
369 Linker_Options.Table (Linker_Options.Last) :=
375 elsif Arg'Length = 2 then
378 Ada_Bind_File := True;
379 Begin_Info := "-- BEGIN Object file/option list";
380 End_Info := "-- END Object file/option list ";
383 Linker_Options.Increment_Last;
384 Linker_Options.Table (Linker_Options.Last) :=
387 Binder_Options.Increment_Last;
388 Binder_Options.Table (Binder_Options.Last) :=
389 Linker_Options.Table (Linker_Options.Last);
391 Next_Arg := Next_Arg + 1;
393 if Next_Arg > Argument_Count then
394 Exit_With_Error ("Missing argument for -b");
397 Get_Machine_Name : declare
398 Name_Arg : constant String_Access :=
399 new String'(Argument (Next_Arg));
402 Linker_Options.Increment_Last;
403 Linker_Options.Table (Linker_Options.Last) :=
406 Binder_Options.Increment_Last;
407 Binder_Options.Table (Binder_Options.Last) :=
410 end Get_Machine_Name;
413 Ada_Bind_File := False;
414 Begin_Info := "/* BEGIN Object file/option list";
415 End_Info := " END Object file/option list */";
418 if Object_List_File_Supported then
419 Object_List_File_Required := True;
422 ("Object list file not supported on this target");
426 Create_Map_File := True;
429 Compile_Bind_File := False;
432 if VM_Target = CLI_Target then
433 Linker_Options.Increment_Last;
434 Linker_Options.Table (Linker_Options.Last) :=
435 new String'("/QUIET");
438 Linker_Options.Increment_Last;
439 Linker_Options.Table (Linker_Options.Last) :=
443 Next_Arg := Next_Arg + 1;
445 if Next_Arg > Argument_Count then
446 Exit_With_Error ("Missing argument for -o");
449 if VM_Target = CLI_Target then
451 new String'("/OUTPUT=" & Argument (Next_Arg));
454 new String'(Argument (Next_Arg));
457 Linker_Options.Increment_Last;
458 Linker_Options.Table (Linker_Options.Last) :=
462 Opt.Run_Path_Option := False;
466 -- Support "double" verbose mode. Second -v
467 -- gets sent to the linker and binder phases.
470 Very_Verbose_Mode := True;
472 Linker_Options.Increment_Last;
473 Linker_Options.Table (Linker_Options.Last) :=
476 Binder_Options.Increment_Last;
477 Binder_Options.Table (Binder_Options.Last) :=
478 Linker_Options.Table (Linker_Options.Last);
481 Verbose_Mode := True;
486 Linker_Options.Increment_Last;
487 Linker_Options.Table (Linker_Options.Last) :=
492 elsif Arg (2) = 'B' then
493 Linker_Options.Increment_Last;
494 Linker_Options.Table (Linker_Options.Last) :=
497 Binder_Options.Increment_Last;
498 Binder_Options.Table (Binder_Options.Last) :=
499 Linker_Options.Table (Linker_Options.Last);
501 elsif Arg'Length >= 7 and then Arg (1 .. 7) = "--LINK=" then
502 if Arg'Length = 7 then
503 Exit_With_Error ("Missing argument for --LINK=");
507 System.OS_Lib.Locate_Exec_On_Path (Arg (8 .. Arg'Last));
509 if Linker_Path = null then
511 ("Could not locate linker: " & Arg (8 .. Arg'Last));
514 elsif Arg'Length > 6 and then Arg (1 .. 6) = "--GCC=" then
516 Program_Args : constant Argument_List_Access :=
517 Argument_String_To_List
518 (Arg (7 .. Arg'Last));
521 Gcc := new String'(Program_Args.all (1).all);
522 Standard_Gcc := False;
524 -- Set appropriate flags for switches passed
526 for J in 2 .. Program_Args.all'Last loop
528 Arg : constant String := Program_Args.all (J).all;
529 AF : constant Integer := Arg'First;
532 if Arg'Length /= 0 and then Arg (AF) = '-' then
533 if Arg (AF + 1) = 'g'
534 and then (Arg'Length = 2
535 or else Arg (AF + 2) in '0' .. '3'
536 or else Arg (AF + 2 .. Arg'Last) = "coff")
538 Debug_Flag_Present := True;
542 -- Add directory to source search dirs so that
543 -- Get_Target_Parameters can find system.ads
545 if Arg (AF .. AF + 1) = "-I"
546 and then Arg'Length > 2
548 Add_Src_Search_Dir (Arg (AF + 2 .. Arg'Last));
551 -- Pass to gcc for compiling binder generated file
552 -- No use passing libraries, it will just generate
555 if not (Arg (AF .. AF + 1) = "-l"
556 or else Arg (AF .. AF + 1) = "-L")
558 Binder_Options.Increment_Last;
559 Binder_Options.Table (Binder_Options.Last) :=
563 -- Pass to gcc for linking program
565 Gcc_Linker_Options.Increment_Last;
566 Gcc_Linker_Options.Table
567 (Gcc_Linker_Options.Last) := new String'(Arg);
572 -- Send all multi-character switches not recognized as
573 -- a special case by gnatlink to the linker/loader stage.
576 Linker_Options.Increment_Last;
577 Linker_Options.Table (Linker_Options.Last) :=
581 -- Here if argument is a file name rather than a switch
584 -- If explicit ali file, capture it
587 and then Arg (Arg'Last - 3 .. Arg'Last) = ".ali"
589 if Ali_File_Name = null then
590 Ali_File_Name := new String'(Arg);
592 Exit_With_Error ("cannot handle more than one ALI file");
595 -- If target object file, record object file
597 elsif Arg'Length > Get_Target_Object_Suffix.all'Length
600 Get_Target_Object_Suffix.all'Length + 1 .. Arg'Last)
601 = Get_Target_Object_Suffix.all
603 Linker_Objects.Increment_Last;
604 Linker_Objects.Table (Linker_Objects.Last) :=
607 -- If host object file, record object file
608 -- e.g. accept foo.o as well as foo.obj on VMS target
610 elsif Arg'Length > Get_Object_Suffix.all'Length
612 (Arg'Last - Get_Object_Suffix.all'Length + 1 .. Arg'Last)
613 = Get_Object_Suffix.all
615 Linker_Objects.Increment_Last;
616 Linker_Objects.Table (Linker_Objects.Last) :=
619 -- If corresponding ali file exists, capture it
621 elsif Ali_File_Name = null
622 and then Is_Regular_File (Arg & ".ali")
624 Ali_File_Name := new String'(Arg & ".ali");
626 -- Otherwise assume this is a linker options entry, but
627 -- see below for interesting adjustment to this assumption.
630 Linker_Options.Increment_Last;
631 Linker_Options.Table (Linker_Options.Last) :=
637 Next_Arg := Next_Arg + 1;
640 -- If Ada bind file, then compile it with warnings suppressed, because
641 -- otherwise the with of the main program may cause junk warnings.
643 if Ada_Bind_File then
644 Binder_Options.Increment_Last;
645 Binder_Options.Table (Binder_Options.Last) := new String'("-gnatws");
648 -- If we did not get an ali file at all, and we had at least one
649 -- linker option, then assume that was the intended ali file after
650 -- all, so that we get a nicer message later on.
652 if Ali_File_Name = null
653 and then Linker_Options.Last >= Linker_Options.First
656 new String'(Linker_Options.Table (Linker_Options.First).all &
661 -------------------------
662 -- Process_Binder_File --
663 -------------------------
665 procedure Process_Binder_File (Name : String) is
667 -- Binder file's descriptor
669 Link_Bytes : Integer := 0;
670 -- Projected number of bytes for the linker command line
673 pragma Import (C, Link_Max, "__gnat_link_max");
674 -- Maximum number of bytes on the command line supported by the OS
675 -- linker. Passed this limit the response file mechanism must be used
678 Next_Line : String (1 .. 1000);
679 -- Current line value
683 -- Current line slice (the slice does not contain line terminator)
686 -- Current line last character for shared libraries (without version)
688 Objs_Begin : Integer := 0;
689 -- First object file index in Linker_Objects table
691 Objs_End : Integer := 0;
692 -- Last object file index in Linker_Objects table
695 pragma Warnings (Off, Status);
696 -- Used for various Interfaces.C_Streams calls
698 Closing_Status : Boolean;
699 pragma Warnings (Off, Closing_Status);
702 GNAT_Static : Boolean := False;
703 -- Save state of -static option
705 GNAT_Shared : Boolean := False;
706 -- Save state of -shared option
708 Xlinker_Was_Previous : Boolean := False;
709 -- Indicate that "-Xlinker" was the option preceding the current
710 -- option. If True, then the current option is never suppressed.
714 -- These data items are used to store current binder file context.
715 -- The context is composed of the file descriptor position and the
716 -- current line together with the slice indexes (first and last
717 -- position) for this line. The rollback data are used by the
718 -- Store_File_Context and Rollback_File_Context routines below.
719 -- The file context mechanism interact only with the Get_Next_Line
720 -- call. For example:
722 -- Store_File_Context;
724 -- Rollback_File_Context;
727 -- Both Get_Next_Line calls above will read the exact same data from
728 -- the file. In other words, Next_Line, Nfirst and Nlast variables
729 -- will be set with the exact same values.
731 RB_File_Pos : long; -- File position
732 RB_Next_Line : String (1 .. 1000); -- Current line content
733 RB_Nlast : Integer; -- Slice last index
734 RB_Nfirst : Integer; -- Slice first index
736 Run_Path_Option_Ptr : Interfaces.C.Strings.chars_ptr;
737 pragma Import (C, Run_Path_Option_Ptr, "__gnat_run_path_option");
738 -- Pointer to string representing the native linker option which
739 -- specifies the path where the dynamic loader should find shared
740 -- libraries. Equal to null string if this system doesn't support it.
742 Object_Library_Ext_Ptr : Interfaces.C.Strings.chars_ptr;
744 (C, Object_Library_Ext_Ptr, "__gnat_object_library_extension");
745 -- Pointer to string specifying the default extension for
746 -- object libraries, e.g. Unix uses ".a", VMS uses ".olb".
748 Object_File_Option_Ptr : Interfaces.C.Strings.chars_ptr;
749 pragma Import (C, Object_File_Option_Ptr, "__gnat_object_file_option");
750 -- Pointer to a string representing the linker option which specifies
751 -- the response file.
753 Using_GNU_Linker : Boolean;
754 for Using_GNU_Linker'Size use Character'Size;
755 pragma Import (C, Using_GNU_Linker, "__gnat_using_gnu_linker");
756 -- Predicate indicating whether this target uses the GNU linker. In
757 -- this case we must output a GNU linker compatible response file.
759 Opening : aliased constant String := """";
760 Closing : aliased constant String := '"' & ASCII.LF;
761 -- Needed to quote object paths in object list files when GNU linker
764 procedure Get_Next_Line;
765 -- Read the next line from the binder file without the line
768 function Index (S, Pattern : String) return Natural;
769 -- Return the last occurrence of Pattern in S, or 0 if none
771 function Is_Option_Present (Opt : String) return Boolean;
772 -- Return true if the option Opt is already present in
773 -- Linker_Options table.
775 procedure Store_File_Context;
776 -- Store current file context, Fd position and current line data.
777 -- The file context is stored into the rollback data above (RB_*).
778 -- Store_File_Context can be called at any time, only the last call
779 -- will be used (i.e. this routine overwrites the file context).
781 procedure Rollback_File_Context;
782 -- Restore file context from rollback data. This routine must be called
783 -- after Store_File_Context. The binder file context will be restored
784 -- with the data stored by the last Store_File_Context call.
790 procedure Get_Next_Line is
794 Fchars := fgets (Next_Line'Address, Next_Line'Length, Fd);
796 if Fchars = System.Null_Address then
797 Exit_With_Error ("Error reading binder output");
800 Nfirst := Next_Line'First;
802 while Nlast <= Next_Line'Last
803 and then Next_Line (Nlast) /= ASCII.LF
804 and then Next_Line (Nlast) /= ASCII.CR
816 function Index (S, Pattern : String) return Natural is
817 Len : constant Natural := Pattern'Length;
820 for J in reverse S'First .. S'Last - Len + 1 loop
821 if Pattern = S (J .. J + Len - 1) then
829 -----------------------
830 -- Is_Option_Present --
831 -----------------------
833 function Is_Option_Present (Opt : String) return Boolean is
835 for I in 1 .. Linker_Options.Last loop
837 if Linker_Options.Table (I).all = Opt then
844 end Is_Option_Present;
846 ---------------------------
847 -- Rollback_File_Context --
848 ---------------------------
850 procedure Rollback_File_Context is
852 Next_Line := RB_Next_Line;
855 Status := fseek (Fd, RB_File_Pos, Interfaces.C_Streams.SEEK_SET);
858 Exit_With_Error ("Error setting file position");
860 end Rollback_File_Context;
862 ------------------------
863 -- Store_File_Context --
864 ------------------------
866 procedure Store_File_Context is
867 use type System.CRTL.long;
869 RB_Next_Line := Next_Line;
872 RB_File_Pos := ftell (Fd);
874 if RB_File_Pos = -1 then
875 Exit_With_Error ("Error getting file position");
877 end Store_File_Context;
879 -- Start of processing for Process_Binder_File
882 Fd := fopen (Name'Address, Read_Mode'Address);
884 if Fd = NULL_Stream then
885 Exit_With_Error ("Failed to open binder output");
888 -- Skip up to the Begin Info line
892 exit when Next_Line (Nfirst .. Nlast) = Begin_Info;
898 -- Go to end when end line is reached (this will happen in
899 -- High_Integrity_Mode where no -L switches are generated)
901 exit when Next_Line (Nfirst .. Nlast) = End_Info;
903 if Ada_Bind_File then
904 Next_Line (Nfirst .. Nlast - 8) :=
905 Next_Line (Nfirst + 8 .. Nlast);
909 -- Go to next section when switches are reached
911 exit when Next_Line (1) = '-';
913 -- Otherwise we have another object file to collect
915 Linker_Objects.Increment_Last;
917 -- Mark the positions of first and last object files in case
918 -- they need to be placed with a named file on systems having
919 -- linker line limitations.
921 if Objs_Begin = 0 then
922 Objs_Begin := Linker_Objects.Last;
925 Linker_Objects.Table (Linker_Objects.Last) :=
926 new String'(Next_Line (Nfirst .. Nlast));
928 Link_Bytes := Link_Bytes + Nlast - Nfirst + 2;
929 -- Nlast - Nfirst + 1, for the size, plus one for the space between
933 Objs_End := Linker_Objects.Last;
935 -- Let's continue to compute the Link_Bytes, the linker options are
936 -- part of command line length.
940 while Next_Line (Nfirst .. Nlast) /= End_Info loop
941 Link_Bytes := Link_Bytes + Nlast - Nfirst + 2;
946 Rollback_File_Context;
948 -- On systems that have limitations on handling very long linker lines
949 -- we make use of the system linker option which takes a list of object
950 -- file names from a file instead of the command line itself. What we do
951 -- is to replace the list of object files by the special linker option
952 -- which then reads the object file list from a file instead. The option
953 -- to read from a file instead of the command line is only triggered if
954 -- a conservative threshold is passed.
956 if Object_List_File_Required
957 or else (Object_List_File_Supported
958 and then Link_Bytes > Link_Max)
960 -- Create a temporary file containing the Ada user object files
961 -- needed by the link. This list is taken from the bind file
962 -- and is output one object per line for maximal compatibility with
963 -- linkers supporting this option.
965 Create_Temp_File (Tname_FD, Tname);
967 -- ??? File descriptor should be checked to not be Invalid_FD.
968 -- ??? Status of Write and Close operations should be checked, and
969 -- failure should occur if a status is wrong.
971 -- If target is using the GNU linker we must add a special header
972 -- and footer in the response file.
974 -- The syntax is : INPUT (object1.o object2.o ... )
976 -- Because the GNU linker does not like name with characters such
977 -- as '!', we must put the object paths between double quotes.
979 if Using_GNU_Linker then
981 GNU_Header : aliased constant String := "INPUT (";
984 Status := Write (Tname_FD, GNU_Header'Address,
989 for J in Objs_Begin .. Objs_End loop
991 -- Opening quote for GNU linker
993 if Using_GNU_Linker then
994 Status := Write (Tname_FD, Opening'Address, 1);
997 Status := Write (Tname_FD, Linker_Objects.Table (J).all'Address,
998 Linker_Objects.Table (J).all'Length);
1000 -- Closing quote for GNU linker
1002 if Using_GNU_Linker then
1003 Status := Write (Tname_FD, Closing'Address, 2);
1006 Status := Write (Tname_FD, ASCII.LF'Address, 1);
1009 Response_File_Objects.Increment_Last;
1010 Response_File_Objects.Table (Response_File_Objects.Last) :=
1011 Linker_Objects.Table (J);
1014 -- Handle GNU linker response file footer
1016 if Using_GNU_Linker then
1018 GNU_Footer : aliased constant String := ")";
1021 Status := Write (Tname_FD, GNU_Footer'Address,
1026 Close (Tname_FD, Closing_Status);
1028 -- Add the special objects list file option together with the name
1029 -- of the temporary file (removing the null character) to the objects
1032 Linker_Objects.Table (Objs_Begin) :=
1033 new String'(Value (Object_File_Option_Ptr) &
1034 Tname (Tname'First .. Tname'Last - 1));
1036 -- The slots containing these object file names are then removed
1037 -- from the objects table so they do not appear in the link. They
1038 -- are removed by moving up the linker options and non-Ada object
1039 -- files appearing after the Ada object list in the table.
1045 N := Objs_End - Objs_Begin + 1;
1047 for J in Objs_End + 1 .. Linker_Objects.Last loop
1048 Linker_Objects.Table (J - N + 1) := Linker_Objects.Table (J);
1051 Linker_Objects.Set_Last (Linker_Objects.Last - N + 1);
1055 -- Process switches and options
1057 if Next_Line (Nfirst .. Nlast) /= End_Info then
1058 Xlinker_Was_Previous := False;
1061 if Xlinker_Was_Previous
1062 or else Next_Line (Nfirst .. Nlast) = "-Xlinker"
1064 Linker_Options.Increment_Last;
1065 Linker_Options.Table (Linker_Options.Last) :=
1066 new String'(Next_Line (Nfirst .. Nlast));
1068 elsif Next_Line (Nfirst .. Nlast) = "-static" then
1069 GNAT_Static := True;
1071 elsif Next_Line (Nfirst .. Nlast) = "-shared" then
1072 GNAT_Shared := True;
1074 -- Add binder options only if not already set on the command
1075 -- line. This rule is a way to control the linker options order.
1077 -- The following test needs comments, why is it VMS specific.
1078 -- The above comment looks out of date ???
1080 elsif not (OpenVMS_On_Target
1082 Is_Option_Present (Next_Line (Nfirst .. Nlast)))
1084 if Nlast > Nfirst + 2 and then
1085 Next_Line (Nfirst .. Nfirst + 1) = "-L"
1087 -- Construct a library search path for use later
1088 -- to locate static gnatlib libraries.
1090 if Libpath.Last > 1 then
1091 Libpath.Increment_Last;
1092 Libpath.Table (Libpath.Last) := Path_Separator;
1095 for I in Nfirst + 2 .. Nlast loop
1096 Libpath.Increment_Last;
1097 Libpath.Table (Libpath.Last) := Next_Line (I);
1100 Linker_Options.Increment_Last;
1102 Linker_Options.Table (Linker_Options.Last) :=
1103 new String'(Next_Line (Nfirst .. Nlast));
1105 elsif Next_Line (Nfirst .. Nlast) = "-ldecgnat"
1106 or else Next_Line (Nfirst .. Nlast) = "-lgnarl"
1107 or else Next_Line (Nfirst .. Nlast) = "-lgnat"
1109 (1 .. Natural'Min (Nlast, 8 + Library_Version'Length)) =
1110 Shared_Lib ("gnarl")
1112 (1 .. Natural'Min (Nlast, 7 + Library_Version'Length)) =
1115 -- If it is a shared library, remove the library version.
1116 -- We will be looking for the static version of the library
1117 -- as it is in the same directory as the shared version.
1119 if Next_Line (Nlast - Library_Version'Length + 1 .. Nlast)
1122 -- Set Last to point to last character before the
1125 Last := Nlast - Library_Version'Length - 1;
1130 -- Given a Gnat standard library, search the
1131 -- library path to find the library location
1134 File_Path : String_Access;
1136 Object_Lib_Extension : constant String :=
1137 Value (Object_Library_Ext_Ptr);
1139 File_Name : constant String := "lib" &
1140 Next_Line (Nfirst + 2 .. Last) &
1141 Object_Lib_Extension;
1143 Run_Path_Opt : constant String :=
1144 Value (Run_Path_Option_Ptr);
1146 GCC_Index : Natural;
1147 Run_Path_Opt_Index : Natural := 0;
1151 Locate_Regular_File (File_Name,
1152 String (Libpath.Table (1 .. Libpath.Last)));
1154 if File_Path /= null then
1157 -- If static gnatlib found, explicitly
1158 -- specify to overcome possible linker
1159 -- default usage of shared version.
1161 Linker_Options.Increment_Last;
1163 Linker_Options.Table (Linker_Options.Last) :=
1164 new String'(File_Path.all);
1166 elsif GNAT_Shared then
1167 if Opt.Run_Path_Option then
1168 -- If shared gnatlib desired, add the
1169 -- appropriate system specific switch
1170 -- so that it can be located at runtime.
1172 if Run_Path_Opt'Length /= 0 then
1173 -- Output the system specific linker command
1174 -- that allows the image activator to find
1175 -- the shared library at runtime.
1176 -- Also add path to find libgcc_s.so, if
1179 -- To find the location of the shared version
1180 -- of libgcc, we look for "gcc-lib" in the
1181 -- path of the library. However, this
1182 -- subdirectory is no longer present in
1183 -- in recent version of GCC. So, we look for
1184 -- the last subdirectory "lib" in the path.
1187 Index (File_Path.all, "gcc-lib");
1189 if GCC_Index /= 0 then
1190 -- The shared version of libgcc is
1191 -- located in the parent directory.
1193 GCC_Index := GCC_Index - 1;
1197 Index (File_Path.all, "/lib/");
1199 if GCC_Index = 0 then
1201 Index (File_Path.all,
1202 Directory_Separator &
1204 Directory_Separator);
1207 -- We have found a subdirectory "lib",
1208 -- this is where the shared version of
1209 -- libgcc should be located.
1211 if GCC_Index /= 0 then
1212 GCC_Index := GCC_Index + 3;
1216 -- Look for an eventual run_path_option in
1217 -- the linker switches.
1219 for J in reverse 1 .. Linker_Options.Last loop
1220 if Linker_Options.Table (J) /= null
1222 Linker_Options.Table (J)'Length
1223 > Run_Path_Opt'Length
1225 Linker_Options.Table (J)
1226 (1 .. Run_Path_Opt'Length) =
1229 -- We have found a already specified
1230 -- run_path_option: we will add to this
1231 -- switch, because only one
1232 -- run_path_option should be specified.
1234 Run_Path_Opt_Index := J;
1239 -- If there is no run_path_option, we need
1242 if Run_Path_Opt_Index = 0 then
1243 Linker_Options.Increment_Last;
1246 if GCC_Index = 0 then
1247 if Run_Path_Opt_Index = 0 then
1248 Linker_Options.Table
1249 (Linker_Options.Last) :=
1253 (1 .. File_Path'Length
1254 - File_Name'Length));
1257 Linker_Options.Table
1258 (Run_Path_Opt_Index) :=
1260 (Linker_Options.Table
1261 (Run_Path_Opt_Index).all
1264 (1 .. File_Path'Length
1265 - File_Name'Length));
1269 if Run_Path_Opt_Index = 0 then
1270 Linker_Options.Table
1271 (Linker_Options.Last) :=
1272 new String'(Run_Path_Opt
1274 (1 .. File_Path'Length
1277 & File_Path (1 .. GCC_Index));
1280 Linker_Options.Table
1281 (Run_Path_Opt_Index) :=
1283 (Linker_Options.Table
1284 (Run_Path_Opt_Index).all
1287 (1 .. File_Path'Length
1290 & File_Path (1 .. GCC_Index));
1296 -- Then we add the appropriate -l switch
1298 Linker_Options.Increment_Last;
1299 Linker_Options.Table (Linker_Options.Last) :=
1300 new String'(Next_Line (Nfirst .. Nlast));
1304 -- If gnatlib library not found, then
1305 -- add it anyway in case some other
1306 -- mechanism may find it.
1308 Linker_Options.Increment_Last;
1309 Linker_Options.Table (Linker_Options.Last) :=
1310 new String'(Next_Line (Nfirst .. Nlast));
1314 Linker_Options.Increment_Last;
1315 Linker_Options.Table (Linker_Options.Last) :=
1316 new String'(Next_Line (Nfirst .. Nlast));
1320 Xlinker_Was_Previous := Next_Line (Nfirst .. Nlast) = "-Xlinker";
1323 exit when Next_Line (Nfirst .. Nlast) = End_Info;
1325 if Ada_Bind_File then
1326 Next_Line (Nfirst .. Nlast - 8) :=
1327 Next_Line (Nfirst + 8 .. Nlast);
1333 -- If -shared was specified, invoke gcc with -shared-libgcc
1336 Linker_Options.Increment_Last;
1337 Linker_Options.Table (Linker_Options.Last) := Shared_Libgcc;
1340 Status := fclose (Fd);
1341 end Process_Binder_File;
1349 Write_Str ("Usage: ");
1350 Write_Str (Base_Name (Command_Name));
1351 Write_Str (" switches mainprog.ali [non-Ada-objects] [linker-options]");
1354 Write_Line (" mainprog.ali the ALI file of the main program");
1356 Write_Line (" -A Binder generated source file is in Ada (default)");
1357 Write_Line (" -C Binder generated source file is in C");
1358 Write_Line (" -f force object file list to be generated");
1359 Write_Line (" -g Compile binder source file with debug information");
1360 Write_Line (" -n Do not compile the binder source file");
1361 Write_Line (" -R Do not use a run_path_option");
1362 Write_Line (" -v verbose mode");
1363 Write_Line (" -v -v very verbose mode");
1365 Write_Line (" -o nam Use 'nam' as the name of the executable");
1366 Write_Line (" -b target Compile the binder source to run on target");
1367 Write_Line (" -Bdir Load compiler executables from dir");
1369 if Is_Supported (Map_File) then
1370 Write_Line (" -Mmap Create map file map");
1371 Write_Line (" -M Create map file mainprog.map");
1374 Write_Line (" --GCC=comp Use comp as the compiler");
1375 Write_Line (" --LINK=nam Use 'nam' for the linking rather than 'gcc'");
1377 Write_Line (" [non-Ada-objects] list of non Ada object files");
1378 Write_Line (" [linker-options] other options for the linker");
1385 procedure Write_Header is
1387 if Verbose_Mode then
1389 Display_Version ("GNATLINK", "1995");
1397 procedure Write_Usage is
1403 -- Start of processing for Gnatlink
1406 -- Add the directory where gnatlink is invoked in front of the
1407 -- path, if gnatlink is invoked with directory information.
1408 -- Only do this if the platform is not VMS, where the notion of path
1409 -- does not really exist.
1411 if not Hostparm.OpenVMS then
1413 Command : constant String := Command_Name;
1416 for Index in reverse Command'Range loop
1417 if Command (Index) = Directory_Separator then
1419 Absolute_Dir : constant String :=
1421 (Command (Command'First .. Index));
1423 PATH : constant String :=
1426 Getenv ("PATH").all;
1429 Setenv ("PATH", PATH);
1440 if Argument_Count = 0
1442 (Verbose_Mode and then Argument_Count = 1)
1445 Exit_Program (E_Fatal);
1448 -- Get target parameters
1453 Osint.Add_Default_Search_Dirs;
1454 Targparm.Get_Target_Parameters;
1456 if VM_Target /= No_VM then
1458 when JVM_Target => Gcc := new String'("jgnat");
1459 when CLI_Target => Gcc := new String'("dotnet-gnatcompile");
1460 when No_VM => raise Program_Error;
1463 Ada_Bind_File := True;
1464 Begin_Info := "-- BEGIN Object file/option list";
1465 End_Info := "-- END Object file/option list ";
1468 -- We always compile with -c
1470 Binder_Options_From_ALI.Increment_Last;
1471 Binder_Options_From_ALI.Table (Binder_Options_From_ALI.Last) :=
1474 -- If the main program is in Ada it is compiled with the following
1477 -- -gnatA stops reading gnat.adc, since we don't know what
1478 -- pragmas would work, and we do not need it anyway.
1480 -- -gnatWb allows brackets coding for wide characters
1482 -- -gnatiw allows wide characters in identifiers. This is needed
1483 -- because bindgen uses brackets encoding for all upper
1484 -- half and wide characters in identifier names.
1486 if Ada_Bind_File then
1487 Binder_Options_From_ALI.Increment_Last;
1488 Binder_Options_From_ALI.Table (Binder_Options_From_ALI.Last) :=
1489 new String'("-gnatA");
1490 Binder_Options_From_ALI.Increment_Last;
1491 Binder_Options_From_ALI.Table (Binder_Options_From_ALI.Last) :=
1492 new String'("-gnatWb");
1493 Binder_Options_From_ALI.Increment_Last;
1494 Binder_Options_From_ALI.Table (Binder_Options_From_ALI.Last) :=
1495 new String'("-gnatiw");
1498 -- Locate all the necessary programs and verify required files are present
1500 Gcc_Path := System.OS_Lib.Locate_Exec_On_Path (Gcc.all);
1502 if Gcc_Path = null then
1503 Exit_With_Error ("Couldn't locate " & Gcc.all);
1506 if Linker_Path = null then
1507 if VM_Target = CLI_Target then
1508 Linker_Path := System.OS_Lib.Locate_Exec_On_Path ("ilasm");
1510 if Linker_Path = null then
1511 Exit_With_Error ("Couldn't locate ilasm");
1514 Linker_Path := Gcc_Path;
1518 if Ali_File_Name = null then
1519 Exit_With_Error ("no ali file given for link");
1522 if not Is_Regular_File (Ali_File_Name.all) then
1523 Exit_With_Error (Ali_File_Name.all & " not found");
1526 -- Read the ALI file of the main subprogram if the binder generated
1527 -- file needs to be compiled and no --GCC= switch has been specified.
1528 -- Fetch the back end switches from this ALI file and use these switches
1529 -- to compile the binder generated file
1531 if Compile_Bind_File and then Standard_Gcc then
1534 Name_Len := Ali_File_Name'Length;
1535 Name_Buffer (1 .. Name_Len) := Ali_File_Name.all;
1539 F : constant File_Name_Type := Name_Find;
1540 T : Text_Buffer_Ptr;
1544 -- Load the ALI file
1546 T := Read_Library_Info (F, True);
1548 -- Read it. Note that we ignore errors, since we only want very
1549 -- limited information from the ali file, and likely a slightly
1550 -- wrong version will be just fine, though in normal operation
1551 -- we don't expect this to happen!
1558 Ignore_Errors => True);
1560 if A /= No_ALI_Id then
1562 Index in Units.Table (ALIs.Table (A).First_Unit).First_Arg ..
1563 Units.Table (ALIs.Table (A).First_Unit).Last_Arg
1565 -- Do not compile with the front end switches. However, --RTS
1566 -- is to be dealt with specially because it needs to be passed
1567 -- if the binder-generated file is in Ada and may also be used
1568 -- to drive the linker.
1571 Arg : String_Ptr renames Args.Table (Index);
1573 if not Is_Front_End_Switch (Arg.all) then
1574 Binder_Options_From_ALI.Increment_Last;
1575 Binder_Options_From_ALI.Table
1576 (Binder_Options_From_ALI.Last) := String_Access (Arg);
1578 elsif Arg'Length > 5
1579 and then Arg (Arg'First + 2 .. Arg'First + 5) = "RTS="
1581 if Ada_Bind_File then
1582 Binder_Options_From_ALI.Increment_Last;
1583 Binder_Options_From_ALI.Table
1584 (Binder_Options_From_ALI.Last)
1585 := String_Access (Arg);
1588 -- GNAT doesn't support the GCC multilib mechanism.
1589 -- This means that, when a multilib switch is used
1590 -- to request a particular compilation mode, the
1591 -- corresponding runtime switch (--RTS) must also be
1592 -- specified. The long-term goal is to fully support the
1593 -- multilib mechanism; however, in the meantime, it is
1594 -- convenient to eliminate the redundancy by keying the
1595 -- compilation mode on a single switch, namely --RTS.
1597 -- Pass -mrtp to the linker if --RTS=rtp was passed
1599 if Linker_Path = Gcc_Path
1600 and then Arg'Length > 8
1601 and then Arg (Arg'First + 6 .. Arg'First + 8) = "rtp"
1603 Linker_Options.Increment_Last;
1604 Linker_Options.Table (Linker_Options.Last) :=
1605 new String'("-mrtp");
1607 -- Pass -fsjlj to the linker if --RTS=sjlj was passed
1609 elsif Linker_Path = Gcc_Path
1610 and then Arg'Length > 9
1611 and then Arg (Arg'First + 6 .. Arg'First + 9) = "sjlj"
1613 Linker_Options.Increment_Last;
1614 Linker_Options.Table (Linker_Options.Last) :=
1615 new String'("-fsjlj");
1626 -- If no output name specified, then use the base name of .ali file name
1628 if Output_File_Name = null then
1630 new String'(Base_Name (Ali_File_Name.all)
1631 & Get_Target_Debuggable_Suffix.all);
1633 if VM_Target = CLI_Target then
1634 Linker_Options.Increment_Last;
1635 Linker_Options.Table (Linker_Options.Last) := new String'("/QUIET");
1637 Linker_Options.Increment_Last;
1638 Linker_Options.Table (Linker_Options.Last) := new String'("/DEBUG");
1640 Linker_Options.Increment_Last;
1641 Linker_Options.Table (Linker_Options.Last) :=
1642 new String'("/OUTPUT=" & Output_File_Name.all);
1645 Linker_Options.Increment_Last;
1646 Linker_Options.Table (Linker_Options.Last) := new String'("-o");
1648 Linker_Options.Increment_Last;
1649 Linker_Options.Table (Linker_Options.Last) :=
1650 new String'(Output_File_Name.all);
1654 -- Warn if main program is called "test", as that may be a built-in command
1655 -- on Unix. On non-Unix systems executables have a suffix, so the warning
1656 -- will not appear. However, do not warn in the case of a cross compiler.
1658 -- Assume this is a cross tool if the executable name is not gnatlink
1660 if Base_Name (Command_Name) = "gnatlink"
1661 and then Output_File_Name.all = "test"
1663 Error_Msg ("warning: executable name """ & Output_File_Name.all
1664 & """ may conflict with shell command");
1667 -- If -M switch was specified, add the switches to create the map file
1669 if Create_Map_File then
1671 Map_Name : constant String := Base_Name (Ali_File_Name.all) & ".map";
1672 Switches : String_List_Access;
1675 Convert (Map_File, Map_Name, Switches);
1677 if Switches /= null then
1678 for J in Switches'Range loop
1679 Linker_Options.Increment_Last;
1680 Linker_Options.Table (Linker_Options.Last) := Switches (J);
1686 -- Perform consistency checks
1688 -- Transform the .ali file name into the binder output file name
1690 Make_Binder_File_Names : declare
1691 Fname : constant String := Base_Name (Ali_File_Name.all);
1692 Fname_Len : Integer := Fname'Length;
1694 function Get_Maximum_File_Name_Length return Integer;
1695 pragma Import (C, Get_Maximum_File_Name_Length,
1696 "__gnat_get_maximum_file_name_length");
1698 Maximum_File_Name_Length : constant Integer :=
1699 Get_Maximum_File_Name_Length;
1701 Bind_File_Prefix : Types.String_Ptr;
1702 -- Contains prefix used for bind files
1707 if not Ada_Bind_File then
1708 Bind_File_Prefix := new String'("b_");
1709 elsif OpenVMS_On_Target then
1710 Bind_File_Prefix := new String'("b__");
1712 Bind_File_Prefix := new String'("b~");
1715 -- If the length of the binder file becomes too long due to
1716 -- the addition of the "b?" prefix, then truncate it.
1718 if Maximum_File_Name_Length > 0 then
1720 Maximum_File_Name_Length - Bind_File_Prefix.all'Length
1722 Fname_Len := Fname_Len - 1;
1727 Fnam : constant String :=
1728 Bind_File_Prefix.all &
1729 Fname (Fname'First .. Fname'First + Fname_Len - 1);
1732 if Ada_Bind_File then
1733 Binder_Spec_Src_File := new String'(Fnam & ".ads");
1734 Binder_Body_Src_File := new String'(Fnam & ".adb");
1735 Binder_Ali_File := new String'(Fnam & ".ali");
1737 Binder_Body_Src_File := new String'(Fnam & ".c");
1740 Binder_Obj_File := new String'(Fnam & Get_Target_Object_Suffix.all);
1743 if Fname_Len /= Fname'Length then
1744 Binder_Options.Increment_Last;
1745 Binder_Options.Table (Binder_Options.Last) := new String'("-o");
1746 Binder_Options.Increment_Last;
1747 Binder_Options.Table (Binder_Options.Last) := Binder_Obj_File;
1749 end Make_Binder_File_Names;
1751 Process_Binder_File (Binder_Body_Src_File.all & ASCII.NUL);
1753 -- Compile the binder file. This is fast, so we always do it, unless
1754 -- specifically told not to by the -n switch
1756 if Compile_Bind_File then
1759 Args : Argument_List
1760 (1 .. Binder_Options_From_ALI.Last + Binder_Options.Last + 1);
1763 for J in 1 .. Binder_Options_From_ALI.Last loop
1764 Args (J) := Binder_Options_From_ALI.Table (J);
1767 for J in 1 .. Binder_Options.Last loop
1768 Args (Binder_Options_From_ALI.Last + J) :=
1769 Binder_Options.Table (J);
1772 -- Use the full path of the binder generated source, so that it is
1773 -- guaranteed that the debugger will find this source, even with
1777 new String'(Normalize_Pathname (Binder_Body_Src_File.all));
1779 if Verbose_Mode then
1780 Write_Str (Base_Name (Gcc_Path.all));
1782 for J in Args'Range loop
1784 Write_Str (Args (J).all);
1790 System.OS_Lib.Spawn (Gcc_Path.all, Args, Success);
1793 Exit_Program (E_Fatal);
1798 -- Now, actually link the program
1800 -- Skip this step for now on JVM since the Java interpreter will do
1801 -- the actual link at run time. We might consider packing all class files
1802 -- in a .zip file during this step.
1804 if VM_Target /= JVM_Target then
1806 Num_Args : Natural :=
1807 (Linker_Options.Last - Linker_Options.First + 1) +
1808 (Gcc_Linker_Options.Last - Gcc_Linker_Options.First + 1) +
1809 (Linker_Objects.Last - Linker_Objects.First + 1);
1810 Stack_Op : Boolean := False;
1811 IDENT_Op : Boolean := False;
1814 if VM_Target = CLI_Target then
1816 -- Remove extraneous flags not relevant for CIL. Also remove empty
1817 -- arguments, since ilasm chokes on them.
1819 for J in reverse Linker_Options.First .. Linker_Options.Last loop
1820 if Linker_Options.Table (J)'Length = 0
1821 or else Linker_Options.Table (J) (1 .. 2) = "-L"
1822 or else Linker_Options.Table (J) (1 .. 2) = "-l"
1823 or else Linker_Options.Table (J) (1 .. 3) = "-Wl"
1824 or else Linker_Options.Table (J) (1 .. 3) = "-sh"
1825 or else Linker_Options.Table (J) (1 .. 2) = "-g"
1827 Linker_Options.Table (J .. Linker_Options.Last - 1) :=
1828 Linker_Options.Table (J + 1 .. Linker_Options.Last);
1829 Linker_Options.Decrement_Last;
1830 Num_Args := Num_Args - 1;
1835 -- Remove duplicate stack size setting from the Linker_Options
1836 -- table. The stack setting option "-Xlinker --stack=R,C" can be
1837 -- found in one line when set by a pragma Linker_Options or in two
1838 -- lines ("-Xlinker" then "--stack=R,C") when set on the command
1839 -- line. We also check for the "-Wl,--stack=R" style option.
1841 -- We must remove the second stack setting option instance
1842 -- because the one on the command line will always be the first
1843 -- one. And any subsequent stack setting option will overwrite the
1844 -- previous one. This is done especially for GNAT/NT where we set
1845 -- the stack size for tasking programs by a pragma in the NT
1846 -- specific tasking package System.Task_Primitives.Operations.
1848 -- Note: This is not a FOR loop that runs from Linker_Options.First
1849 -- to Linker_Options.Last, since operations within the loop can
1850 -- modify the length of the table.
1852 Clean_Link_Option_Set : declare
1853 J : Natural := Linker_Options.First;
1854 Shared_Libgcc_Seen : Boolean := False;
1857 while J <= Linker_Options.Last loop
1859 if Linker_Options.Table (J).all = "-Xlinker"
1860 and then J < Linker_Options.Last
1861 and then Linker_Options.Table (J + 1)'Length > 8
1862 and then Linker_Options.Table (J + 1) (1 .. 8) = "--stack="
1865 Linker_Options.Table (J .. Linker_Options.Last - 2) :=
1866 Linker_Options.Table (J + 2 .. Linker_Options.Last);
1867 Linker_Options.Decrement_Last;
1868 Linker_Options.Decrement_Last;
1869 Num_Args := Num_Args - 2;
1876 -- Remove duplicate -shared-libgcc switch
1878 if Linker_Options.Table (J).all = Shared_Libgcc_String then
1879 if Shared_Libgcc_Seen then
1880 Linker_Options.Table (J .. Linker_Options.Last - 1) :=
1881 Linker_Options.Table (J + 1 .. Linker_Options.Last);
1882 Linker_Options.Decrement_Last;
1883 Num_Args := Num_Args - 1;
1886 Shared_Libgcc_Seen := True;
1890 -- Here we just check for a canonical form that matches the
1891 -- pragma Linker_Options set in the NT runtime.
1893 if (Linker_Options.Table (J)'Length > 17
1894 and then Linker_Options.Table (J) (1 .. 17)
1895 = "-Xlinker --stack=")
1897 (Linker_Options.Table (J)'Length > 12
1898 and then Linker_Options.Table (J) (1 .. 12)
1902 Linker_Options.Table (J .. Linker_Options.Last - 1) :=
1903 Linker_Options.Table (J + 1 .. Linker_Options.Last);
1904 Linker_Options.Decrement_Last;
1905 Num_Args := Num_Args - 1;
1912 -- Remove duplicate IDENTIFICATION directives (VMS)
1914 if Linker_Options.Table (J)'Length > 27
1915 and then Linker_Options.Table (J) (1 .. 28)
1916 = "--for-linker=IDENTIFICATION="
1919 Linker_Options.Table (J .. Linker_Options.Last - 1) :=
1920 Linker_Options.Table (J + 1 .. Linker_Options.Last);
1921 Linker_Options.Decrement_Last;
1922 Num_Args := Num_Args - 1;
1931 if Linker_Path = Gcc_Path and then VM_Target = No_VM then
1933 -- If gcc is not called with -shared-libgcc, call it with
1934 -- -static-libgcc, as there are some platforms where one of
1935 -- these two switches is compulsory to link.
1937 if not Shared_Libgcc_Seen then
1938 Linker_Options.Increment_Last;
1939 Linker_Options.Table (Linker_Options.Last) := Static_Libgcc;
1940 Num_Args := Num_Args + 1;
1944 end Clean_Link_Option_Set;
1946 -- Prepare arguments for call to linker
1948 Call_Linker : declare
1950 Args : Argument_List (1 .. Num_Args + 1);
1951 Index : Integer := Args'First;
1954 Args (Index) := Binder_Obj_File;
1956 -- Add the object files and any -largs libraries
1958 for J in Linker_Objects.First .. Linker_Objects.Last loop
1960 Args (Index) := Linker_Objects.Table (J);
1963 -- Add the linker options from the binder file
1965 for J in Linker_Options.First .. Linker_Options.Last loop
1967 Args (Index) := Linker_Options.Table (J);
1970 -- Finally add the libraries from the --GCC= switch
1972 for J in Gcc_Linker_Options.First .. Gcc_Linker_Options.Last loop
1974 Args (Index) := Gcc_Linker_Options.Table (J);
1977 if Verbose_Mode then
1978 Write_Str (Linker_Path.all);
1980 for J in Args'Range loop
1982 Write_Str (Args (J).all);
1987 -- If we are on very verbose mode (-v -v) and a response file
1988 -- is used we display its content.
1990 if Very_Verbose_Mode and then Tname_FD /= Invalid_FD then
1992 Write_Str ("Response file (" &
1993 Tname (Tname'First .. Tname'Last - 1) &
1998 Response_File_Objects.First ..
1999 Response_File_Objects.Last
2001 Write_Str (Response_File_Objects.Table (J).all);
2009 System.OS_Lib.Spawn (Linker_Path.all, Args, Success);
2011 -- Delete the temporary file used in conjunction with linking if
2012 -- one was created. See Process_Bind_File for details.
2014 if Tname_FD /= Invalid_FD then
2019 Error_Msg ("error when calling " & Linker_Path.all);
2020 Exit_Program (E_Fatal);
2026 -- Only keep the binder output file and it's associated object
2027 -- file if compiling with the -g option. These files are only
2028 -- useful if debugging.
2030 if not Debug_Flag_Present then
2031 if Binder_Ali_File /= null then
2032 Delete (Binder_Ali_File.all & ASCII.NUL);
2035 if Binder_Spec_Src_File /= null then
2036 Delete (Binder_Spec_Src_File.all & ASCII.NUL);
2039 Delete (Binder_Body_Src_File.all & ASCII.NUL);
2041 if VM_Target = No_VM then
2042 Delete (Binder_Obj_File.all & ASCII.NUL);
2046 Exit_Program (E_Success);
2050 Write_Line (Exception_Information (X));
2051 Exit_With_Error ("INTERNAL ERROR. Please report");