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 fullname.
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.
296 -- First, check for --version and --help
298 Check_Version_And_Help ("GNATLINK", "1995", Usage'Unrestricted_Access);
300 -- Loop through arguments of gnatlink command
304 exit when Next_Arg > Argument_Count;
306 Process_One_Arg : declare
307 Arg : constant String := Argument (Next_Arg);
310 -- Case of argument which is a switch
312 -- We definitely need section by section comments here ???
316 -- This argument must not be parsed, just add it to the
317 -- list of linker's options.
321 Linker_Options.Increment_Last;
322 Linker_Options.Table (Linker_Options.Last) :=
325 elsif Arg'Length /= 0 and then Arg (1) = '-' then
326 if Arg'Length > 4 and then Arg (2 .. 5) = "gnat" then
328 ("invalid switch: """ & Arg & """ (gnat not needed here)");
331 if Arg = "-Xlinker" then
333 -- Next argument should be sent directly to the linker.
334 -- We do not want to parse it here.
338 Linker_Options.Increment_Last;
339 Linker_Options.Table (Linker_Options.Last) :=
343 and then (Arg'Length < 5 or else Arg (2 .. 5) /= "gnat")
345 Debug_Flag_Present := True;
347 Linker_Options.Increment_Last;
348 Linker_Options.Table (Linker_Options.Last) :=
351 Binder_Options.Increment_Last;
352 Binder_Options.Table (Binder_Options.Last) :=
353 Linker_Options.Table (Linker_Options.Last);
355 elsif Arg'Length >= 3 and then Arg (2) = 'M' then
357 Switches : String_List_Access;
360 Convert (Map_File, Arg (3 .. Arg'Last), Switches);
362 if Switches /= null then
363 for J in Switches'Range loop
364 Linker_Options.Increment_Last;
365 Linker_Options.Table (Linker_Options.Last) :=
371 elsif Arg'Length = 2 then
374 Ada_Bind_File := True;
375 Begin_Info := "-- BEGIN Object file/option list";
376 End_Info := "-- END Object file/option list ";
379 Linker_Options.Increment_Last;
380 Linker_Options.Table (Linker_Options.Last) :=
383 Binder_Options.Increment_Last;
384 Binder_Options.Table (Binder_Options.Last) :=
385 Linker_Options.Table (Linker_Options.Last);
387 Next_Arg := Next_Arg + 1;
389 if Next_Arg > Argument_Count then
390 Exit_With_Error ("Missing argument for -b");
393 Get_Machine_Name : declare
394 Name_Arg : constant String_Access :=
395 new String'(Argument (Next_Arg));
398 Linker_Options.Increment_Last;
399 Linker_Options.Table (Linker_Options.Last) :=
402 Binder_Options.Increment_Last;
403 Binder_Options.Table (Binder_Options.Last) :=
406 end Get_Machine_Name;
409 Ada_Bind_File := False;
410 Begin_Info := "/* BEGIN Object file/option list";
411 End_Info := " END Object file/option list */";
414 if Object_List_File_Supported then
415 Object_List_File_Required := True;
418 ("Object list file not supported on this target");
422 Create_Map_File := True;
425 Compile_Bind_File := False;
428 if VM_Target = CLI_Target then
429 Linker_Options.Increment_Last;
430 Linker_Options.Table (Linker_Options.Last) :=
431 new String'("/QUIET");
434 Linker_Options.Increment_Last;
435 Linker_Options.Table (Linker_Options.Last) :=
439 Next_Arg := Next_Arg + 1;
441 if Next_Arg > Argument_Count then
442 Exit_With_Error ("Missing argument for -o");
445 if VM_Target = CLI_Target then
447 new String'("/OUTPUT=" & Argument (Next_Arg));
450 new String'(Argument (Next_Arg));
453 Linker_Options.Increment_Last;
454 Linker_Options.Table (Linker_Options.Last) :=
458 Opt.Run_Path_Option := False;
462 -- Support "double" verbose mode. Second -v
463 -- gets sent to the linker and binder phases.
466 Very_Verbose_Mode := True;
468 Linker_Options.Increment_Last;
469 Linker_Options.Table (Linker_Options.Last) :=
472 Binder_Options.Increment_Last;
473 Binder_Options.Table (Binder_Options.Last) :=
474 Linker_Options.Table (Linker_Options.Last);
477 Verbose_Mode := True;
482 Linker_Options.Increment_Last;
483 Linker_Options.Table (Linker_Options.Last) :=
488 elsif Arg (2) = 'B' then
489 Linker_Options.Increment_Last;
490 Linker_Options.Table (Linker_Options.Last) :=
493 Binder_Options.Increment_Last;
494 Binder_Options.Table (Binder_Options.Last) :=
495 Linker_Options.Table (Linker_Options.Last);
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=");
503 System.OS_Lib.Locate_Exec_On_Path (Arg (8 .. Arg'Last));
505 if Linker_Path = null then
507 ("Could not locate linker: " & Arg (8 .. Arg'Last));
510 elsif Arg'Length > 6 and then Arg (1 .. 6) = "--GCC=" then
512 Program_Args : constant Argument_List_Access :=
513 Argument_String_To_List
514 (Arg (7 .. Arg'Last));
517 Gcc := new String'(Program_Args.all (1).all);
518 Standard_Gcc := False;
520 -- Set appropriate flags for switches passed
522 for J in 2 .. Program_Args.all'Last loop
524 Arg : constant String := Program_Args.all (J).all;
525 AF : constant Integer := Arg'First;
528 if Arg'Length /= 0 and then Arg (AF) = '-' then
529 if Arg (AF + 1) = 'g'
530 and then (Arg'Length = 2
531 or else Arg (AF + 2) in '0' .. '3'
532 or else Arg (AF + 2 .. Arg'Last) = "coff")
534 Debug_Flag_Present := True;
538 -- Add directory to source search dirs so that
539 -- Get_Target_Parameters can find system.ads
541 if Arg (AF .. AF + 1) = "-I"
542 and then Arg'Length > 2
544 Add_Src_Search_Dir (Arg (AF + 2 .. Arg'Last));
547 -- Pass to gcc for compiling binder generated file
548 -- No use passing libraries, it will just generate
551 if not (Arg (AF .. AF + 1) = "-l"
552 or else Arg (AF .. AF + 1) = "-L")
554 Binder_Options.Increment_Last;
555 Binder_Options.Table (Binder_Options.Last) :=
559 -- Pass to gcc for linking program
561 Gcc_Linker_Options.Increment_Last;
562 Gcc_Linker_Options.Table
563 (Gcc_Linker_Options.Last) := new String'(Arg);
568 -- Send all multi-character switches not recognized as
569 -- a special case by gnatlink to the linker/loader stage.
572 Linker_Options.Increment_Last;
573 Linker_Options.Table (Linker_Options.Last) :=
577 -- Here if argument is a file name rather than a switch
580 -- If explicit ali file, capture it
583 and then Arg (Arg'Last - 3 .. Arg'Last) = ".ali"
585 if Ali_File_Name = null then
586 Ali_File_Name := new String'(Arg);
588 Exit_With_Error ("cannot handle more than one ALI file");
591 -- If target object file, record object file
593 elsif Arg'Length > Get_Target_Object_Suffix.all'Length
596 Get_Target_Object_Suffix.all'Length + 1 .. Arg'Last)
597 = Get_Target_Object_Suffix.all
599 Linker_Objects.Increment_Last;
600 Linker_Objects.Table (Linker_Objects.Last) :=
603 -- If host object file, record object file
604 -- e.g. accept foo.o as well as foo.obj on VMS target
606 elsif Arg'Length > Get_Object_Suffix.all'Length
608 (Arg'Last - Get_Object_Suffix.all'Length + 1 .. Arg'Last)
609 = Get_Object_Suffix.all
611 Linker_Objects.Increment_Last;
612 Linker_Objects.Table (Linker_Objects.Last) :=
615 -- If corresponding ali file exists, capture it
617 elsif Ali_File_Name = null
618 and then Is_Regular_File (Arg & ".ali")
620 Ali_File_Name := new String'(Arg & ".ali");
622 -- Otherwise assume this is a linker options entry, but
623 -- see below for interesting adjustment to this assumption.
626 Linker_Options.Increment_Last;
627 Linker_Options.Table (Linker_Options.Last) :=
633 Next_Arg := Next_Arg + 1;
636 -- If Ada bind file, then compile it with warnings suppressed, because
637 -- otherwise the with of the main program may cause junk warnings.
639 if Ada_Bind_File then
640 Binder_Options.Increment_Last;
641 Binder_Options.Table (Binder_Options.Last) := new String'("-gnatws");
644 -- If we did not get an ali file at all, and we had at least one
645 -- linker option, then assume that was the intended ali file after
646 -- all, so that we get a nicer message later on.
648 if Ali_File_Name = null
649 and then Linker_Options.Last >= Linker_Options.First
652 new String'(Linker_Options.Table (Linker_Options.First).all &
657 -------------------------
658 -- Process_Binder_File --
659 -------------------------
661 procedure Process_Binder_File (Name : String) is
663 -- Binder file's descriptor
665 Link_Bytes : Integer := 0;
666 -- Projected number of bytes for the linker command line
669 pragma Import (C, Link_Max, "__gnat_link_max");
670 -- Maximum number of bytes on the command line supported by the OS
671 -- linker. Passed this limit the response file mechanism must be used
674 Next_Line : String (1 .. 1000);
675 -- Current line value
679 -- Current line slice (the slice does not contain line terminator)
682 -- Current line last character for shared libraries (without version)
684 Objs_Begin : Integer := 0;
685 -- First object file index in Linker_Objects table
687 Objs_End : Integer := 0;
688 -- Last object file index in Linker_Objects table
691 pragma Warnings (Off, Status);
692 -- Used for various Interfaces.C_Streams calls
694 Closing_Status : Boolean;
695 pragma Warnings (Off, Closing_Status);
698 GNAT_Static : Boolean := False;
699 -- Save state of -static option
701 GNAT_Shared : Boolean := False;
702 -- Save state of -shared option
704 Xlinker_Was_Previous : Boolean := False;
705 -- Indicate that "-Xlinker" was the option preceding the current
706 -- option. If True, then the current option is never suppressed.
710 -- These data items are used to store current binder file context.
711 -- The context is composed of the file descriptor position and the
712 -- current line together with the slice indexes (first and last
713 -- position) for this line. The rollback data are used by the
714 -- Store_File_Context and Rollback_File_Context routines below.
715 -- The file context mechanism interact only with the Get_Next_Line
716 -- call. For example:
718 -- Store_File_Context;
720 -- Rollback_File_Context;
723 -- Both Get_Next_Line calls above will read the exact same data from
724 -- the file. In other words, Next_Line, Nfirst and Nlast variables
725 -- will be set with the exact same values.
727 RB_File_Pos : long; -- File position
728 RB_Next_Line : String (1 .. 1000); -- Current line content
729 RB_Nlast : Integer; -- Slice last index
730 RB_Nfirst : Integer; -- Slice first index
732 Run_Path_Option_Ptr : Interfaces.C.Strings.chars_ptr;
733 pragma Import (C, Run_Path_Option_Ptr, "__gnat_run_path_option");
734 -- Pointer to string representing the native linker option which
735 -- specifies the path where the dynamic loader should find shared
736 -- libraries. Equal to null string if this system doesn't support it.
738 Object_Library_Ext_Ptr : Interfaces.C.Strings.chars_ptr;
740 (C, Object_Library_Ext_Ptr, "__gnat_object_library_extension");
741 -- Pointer to string specifying the default extension for
742 -- object libraries, e.g. Unix uses ".a", VMS uses ".olb".
744 Object_File_Option_Ptr : Interfaces.C.Strings.chars_ptr;
745 pragma Import (C, Object_File_Option_Ptr, "__gnat_object_file_option");
746 -- Pointer to a string representing the linker option which specifies
747 -- the response file.
749 Using_GNU_Linker : Boolean;
750 for Using_GNU_Linker'Size use Character'Size;
751 pragma Import (C, Using_GNU_Linker, "__gnat_using_gnu_linker");
752 -- Predicate indicating whether this target uses the GNU linker. In
753 -- this case we must output a GNU linker compatible response file.
755 Opening : aliased constant String := """";
756 Closing : aliased constant String := '"' & ASCII.LF;
757 -- Needed to quote object paths in object list files when GNU linker
760 procedure Get_Next_Line;
761 -- Read the next line from the binder file without the line
764 function Index (S, Pattern : String) return Natural;
765 -- Return the last occurrence of Pattern in S, or 0 if none
767 function Is_Option_Present (Opt : String) return Boolean;
768 -- Return true if the option Opt is already present in
769 -- Linker_Options table.
771 procedure Store_File_Context;
772 -- Store current file context, Fd position and current line data.
773 -- The file context is stored into the rollback data above (RB_*).
774 -- Store_File_Context can be called at any time, only the last call
775 -- will be used (i.e. this routine overwrites the file context).
777 procedure Rollback_File_Context;
778 -- Restore file context from rollback data. This routine must be called
779 -- after Store_File_Context. The binder file context will be restored
780 -- with the data stored by the last Store_File_Context call.
786 procedure Get_Next_Line is
790 Fchars := fgets (Next_Line'Address, Next_Line'Length, Fd);
792 if Fchars = System.Null_Address then
793 Exit_With_Error ("Error reading binder output");
796 Nfirst := Next_Line'First;
798 while Nlast <= Next_Line'Last
799 and then Next_Line (Nlast) /= ASCII.LF
800 and then Next_Line (Nlast) /= ASCII.CR
812 function Index (S, Pattern : String) return Natural is
813 Len : constant Natural := Pattern'Length;
816 for J in reverse S'First .. S'Last - Len + 1 loop
817 if Pattern = S (J .. J + Len - 1) then
825 -----------------------
826 -- Is_Option_Present --
827 -----------------------
829 function Is_Option_Present (Opt : String) return Boolean is
831 for I in 1 .. Linker_Options.Last loop
833 if Linker_Options.Table (I).all = Opt then
840 end Is_Option_Present;
842 ---------------------------
843 -- Rollback_File_Context --
844 ---------------------------
846 procedure Rollback_File_Context is
848 Next_Line := RB_Next_Line;
851 Status := fseek (Fd, RB_File_Pos, Interfaces.C_Streams.SEEK_SET);
854 Exit_With_Error ("Error setting file position");
856 end Rollback_File_Context;
858 ------------------------
859 -- Store_File_Context --
860 ------------------------
862 procedure Store_File_Context is
863 use type System.CRTL.long;
865 RB_Next_Line := Next_Line;
868 RB_File_Pos := ftell (Fd);
870 if RB_File_Pos = -1 then
871 Exit_With_Error ("Error getting file position");
873 end Store_File_Context;
875 -- Start of processing for Process_Binder_File
878 Fd := fopen (Name'Address, Read_Mode'Address);
880 if Fd = NULL_Stream then
881 Exit_With_Error ("Failed to open binder output");
884 -- Skip up to the Begin Info line
888 exit when Next_Line (Nfirst .. Nlast) = Begin_Info;
894 -- Go to end when end line is reached (this will happen in
895 -- High_Integrity_Mode where no -L switches are generated)
897 exit when Next_Line (Nfirst .. Nlast) = End_Info;
899 if Ada_Bind_File then
900 Next_Line (Nfirst .. Nlast - 8) :=
901 Next_Line (Nfirst + 8 .. Nlast);
905 -- Go to next section when switches are reached
907 exit when Next_Line (1) = '-';
909 -- Otherwise we have another object file to collect
911 Linker_Objects.Increment_Last;
913 -- Mark the positions of first and last object files in case
914 -- they need to be placed with a named file on systems having
915 -- linker line limitations.
917 if Objs_Begin = 0 then
918 Objs_Begin := Linker_Objects.Last;
921 Linker_Objects.Table (Linker_Objects.Last) :=
922 new String'(Next_Line (Nfirst .. Nlast));
924 Link_Bytes := Link_Bytes + Nlast - Nfirst + 2;
925 -- Nlast - Nfirst + 1, for the size, plus one for the space between
929 Objs_End := Linker_Objects.Last;
931 -- Let's continue to compute the Link_Bytes, the linker options are
932 -- part of command line length.
936 while Next_Line (Nfirst .. Nlast) /= End_Info loop
937 Link_Bytes := Link_Bytes + Nlast - Nfirst + 2;
942 Rollback_File_Context;
944 -- On systems that have limitations on handling very long linker lines
945 -- we make use of the system linker option which takes a list of object
946 -- file names from a file instead of the command line itself. What we do
947 -- is to replace the list of object files by the special linker option
948 -- which then reads the object file list from a file instead. The option
949 -- to read from a file instead of the command line is only triggered if
950 -- a conservative threshold is passed.
952 if Object_List_File_Required
953 or else (Object_List_File_Supported
954 and then Link_Bytes > Link_Max)
956 -- Create a temporary file containing the Ada user object files
957 -- needed by the link. This list is taken from the bind file
958 -- and is output one object per line for maximal compatibility with
959 -- linkers supporting this option.
961 Create_Temp_File (Tname_FD, Tname);
963 -- ??? File descriptor should be checked to not be Invalid_FD.
964 -- ??? Status of Write and Close operations should be checked, and
965 -- failure should occur if a status is wrong.
967 -- If target is using the GNU linker we must add a special header
968 -- and footer in the response file.
970 -- The syntax is : INPUT (object1.o object2.o ... )
972 -- Because the GNU linker does not like name with characters such
973 -- as '!', we must put the object paths between double quotes.
975 if Using_GNU_Linker then
977 GNU_Header : aliased constant String := "INPUT (";
980 Status := Write (Tname_FD, GNU_Header'Address,
985 for J in Objs_Begin .. Objs_End loop
987 -- Opening quote for GNU linker
989 if Using_GNU_Linker then
990 Status := Write (Tname_FD, Opening'Address, 1);
993 Status := Write (Tname_FD, Linker_Objects.Table (J).all'Address,
994 Linker_Objects.Table (J).all'Length);
996 -- Closing quote for GNU linker
998 if Using_GNU_Linker then
999 Status := Write (Tname_FD, Closing'Address, 2);
1002 Status := Write (Tname_FD, ASCII.LF'Address, 1);
1005 Response_File_Objects.Increment_Last;
1006 Response_File_Objects.Table (Response_File_Objects.Last) :=
1007 Linker_Objects.Table (J);
1010 -- Handle GNU linker response file footer
1012 if Using_GNU_Linker then
1014 GNU_Footer : aliased constant String := ")";
1017 Status := Write (Tname_FD, GNU_Footer'Address,
1022 Close (Tname_FD, Closing_Status);
1024 -- Add the special objects list file option together with the name
1025 -- of the temporary file (removing the null character) to the objects
1028 Linker_Objects.Table (Objs_Begin) :=
1029 new String'(Value (Object_File_Option_Ptr) &
1030 Tname (Tname'First .. Tname'Last - 1));
1032 -- The slots containing these object file names are then removed
1033 -- from the objects table so they do not appear in the link. They
1034 -- are removed by moving up the linker options and non-Ada object
1035 -- files appearing after the Ada object list in the table.
1041 N := Objs_End - Objs_Begin + 1;
1043 for J in Objs_End + 1 .. Linker_Objects.Last loop
1044 Linker_Objects.Table (J - N + 1) := Linker_Objects.Table (J);
1047 Linker_Objects.Set_Last (Linker_Objects.Last - N + 1);
1051 -- Process switches and options
1053 if Next_Line (Nfirst .. Nlast) /= End_Info then
1054 Xlinker_Was_Previous := False;
1057 if Xlinker_Was_Previous
1058 or else Next_Line (Nfirst .. Nlast) = "-Xlinker"
1060 Linker_Options.Increment_Last;
1061 Linker_Options.Table (Linker_Options.Last) :=
1062 new String'(Next_Line (Nfirst .. Nlast));
1064 elsif Next_Line (Nfirst .. Nlast) = "-static" then
1065 GNAT_Static := True;
1067 elsif Next_Line (Nfirst .. Nlast) = "-shared" then
1068 GNAT_Shared := True;
1070 -- Add binder options only if not already set on the command
1071 -- line. This rule is a way to control the linker options order.
1073 -- The following test needs comments, why is it VMS specific.
1074 -- The above comment looks out of date ???
1076 elsif not (OpenVMS_On_Target
1078 Is_Option_Present (Next_Line (Nfirst .. Nlast)))
1080 if Nlast > Nfirst + 2 and then
1081 Next_Line (Nfirst .. Nfirst + 1) = "-L"
1083 -- Construct a library search path for use later
1084 -- to locate static gnatlib libraries.
1086 if Libpath.Last > 1 then
1087 Libpath.Increment_Last;
1088 Libpath.Table (Libpath.Last) := Path_Separator;
1091 for I in Nfirst + 2 .. Nlast loop
1092 Libpath.Increment_Last;
1093 Libpath.Table (Libpath.Last) := Next_Line (I);
1096 Linker_Options.Increment_Last;
1098 Linker_Options.Table (Linker_Options.Last) :=
1099 new String'(Next_Line (Nfirst .. Nlast));
1101 elsif Next_Line (Nfirst .. Nlast) = "-ldecgnat"
1102 or else Next_Line (Nfirst .. Nlast) = "-lgnarl"
1103 or else Next_Line (Nfirst .. Nlast) = "-lgnat"
1105 (1 .. Natural'Min (Nlast, 8 + Library_Version'Length)) =
1106 Shared_Lib ("gnarl")
1108 (1 .. Natural'Min (Nlast, 7 + Library_Version'Length)) =
1111 -- If it is a shared library, remove the library version.
1112 -- We will be looking for the static version of the library
1113 -- as it is in the same directory as the shared version.
1115 if Next_Line (Nlast - Library_Version'Length + 1 .. Nlast)
1118 -- Set Last to point to last character before the
1121 Last := Nlast - Library_Version'Length - 1;
1126 -- Given a Gnat standard library, search the
1127 -- library path to find the library location
1130 File_Path : String_Access;
1132 Object_Lib_Extension : constant String :=
1133 Value (Object_Library_Ext_Ptr);
1135 File_Name : constant String := "lib" &
1136 Next_Line (Nfirst + 2 .. Last) &
1137 Object_Lib_Extension;
1139 Run_Path_Opt : constant String :=
1140 Value (Run_Path_Option_Ptr);
1142 GCC_Index : Natural;
1143 Run_Path_Opt_Index : Natural := 0;
1147 Locate_Regular_File (File_Name,
1148 String (Libpath.Table (1 .. Libpath.Last)));
1150 if File_Path /= null then
1153 -- If static gnatlib found, explicitly
1154 -- specify to overcome possible linker
1155 -- default usage of shared version.
1157 Linker_Options.Increment_Last;
1159 Linker_Options.Table (Linker_Options.Last) :=
1160 new String'(File_Path.all);
1162 elsif GNAT_Shared then
1163 if Opt.Run_Path_Option then
1164 -- If shared gnatlib desired, add the
1165 -- appropriate system specific switch
1166 -- so that it can be located at runtime.
1168 if Run_Path_Opt'Length /= 0 then
1169 -- Output the system specific linker command
1170 -- that allows the image activator to find
1171 -- the shared library at runtime.
1172 -- Also add path to find libgcc_s.so, if
1175 -- To find the location of the shared version
1176 -- of libgcc, we look for "gcc-lib" in the
1177 -- path of the library. However, this
1178 -- subdirectory is no longer present in
1179 -- in recent version of GCC. So, we look for
1180 -- the last subdirectory "lib" in the path.
1183 Index (File_Path.all, "gcc-lib");
1185 if GCC_Index /= 0 then
1186 -- The shared version of libgcc is
1187 -- located in the parent directory.
1189 GCC_Index := GCC_Index - 1;
1193 Index (File_Path.all, "/lib/");
1195 if GCC_Index = 0 then
1197 Index (File_Path.all,
1198 Directory_Separator &
1200 Directory_Separator);
1203 -- We have found a subdirectory "lib",
1204 -- this is where the shared version of
1205 -- libgcc should be located.
1207 if GCC_Index /= 0 then
1208 GCC_Index := GCC_Index + 3;
1212 -- Look for an eventual run_path_option in
1213 -- the linker switches.
1215 for J in reverse 1 .. Linker_Options.Last loop
1216 if Linker_Options.Table (J) /= null
1218 Linker_Options.Table (J)'Length
1219 > Run_Path_Opt'Length
1221 Linker_Options.Table (J)
1222 (1 .. Run_Path_Opt'Length) =
1225 -- We have found a already specified
1226 -- run_path_option: we will add to this
1227 -- switch, because only one
1228 -- run_path_option should be specified.
1230 Run_Path_Opt_Index := J;
1235 -- If there is no run_path_option, we need
1238 if Run_Path_Opt_Index = 0 then
1239 Linker_Options.Increment_Last;
1242 if GCC_Index = 0 then
1243 if Run_Path_Opt_Index = 0 then
1244 Linker_Options.Table
1245 (Linker_Options.Last) :=
1249 (1 .. File_Path'Length
1250 - File_Name'Length));
1253 Linker_Options.Table
1254 (Run_Path_Opt_Index) :=
1256 (Linker_Options.Table
1257 (Run_Path_Opt_Index).all
1260 (1 .. File_Path'Length
1261 - File_Name'Length));
1265 if Run_Path_Opt_Index = 0 then
1266 Linker_Options.Table
1267 (Linker_Options.Last) :=
1268 new String'(Run_Path_Opt
1270 (1 .. File_Path'Length
1273 & File_Path (1 .. GCC_Index));
1276 Linker_Options.Table
1277 (Run_Path_Opt_Index) :=
1279 (Linker_Options.Table
1280 (Run_Path_Opt_Index).all
1283 (1 .. File_Path'Length
1286 & File_Path (1 .. GCC_Index));
1292 -- Then we add the appropriate -l switch
1294 Linker_Options.Increment_Last;
1295 Linker_Options.Table (Linker_Options.Last) :=
1296 new String'(Next_Line (Nfirst .. Nlast));
1300 -- If gnatlib library not found, then
1301 -- add it anyway in case some other
1302 -- mechanimsm may find it.
1304 Linker_Options.Increment_Last;
1305 Linker_Options.Table (Linker_Options.Last) :=
1306 new String'(Next_Line (Nfirst .. Nlast));
1310 Linker_Options.Increment_Last;
1311 Linker_Options.Table (Linker_Options.Last) :=
1312 new String'(Next_Line (Nfirst .. Nlast));
1316 Xlinker_Was_Previous := Next_Line (Nfirst .. Nlast) = "-Xlinker";
1319 exit when Next_Line (Nfirst .. Nlast) = End_Info;
1321 if Ada_Bind_File then
1322 Next_Line (Nfirst .. Nlast - 8) :=
1323 Next_Line (Nfirst + 8 .. Nlast);
1329 -- If -shared was specified, invoke gcc with -shared-libgcc
1332 Linker_Options.Increment_Last;
1333 Linker_Options.Table (Linker_Options.Last) := Shared_Libgcc;
1336 Status := fclose (Fd);
1337 end Process_Binder_File;
1345 Write_Str ("Usage: ");
1346 Write_Str (Base_Name (Command_Name));
1347 Write_Str (" switches mainprog.ali [non-Ada-objects] [linker-options]");
1350 Write_Line (" mainprog.ali the ALI file of the main program");
1352 Write_Line (" -A Binder generated source file is in Ada (default)");
1353 Write_Line (" -C Binder generated source file is in C");
1354 Write_Line (" -f force object file list to be generated");
1355 Write_Line (" -g Compile binder source file with debug information");
1356 Write_Line (" -n Do not compile the binder source file");
1357 Write_Line (" -R Do not use a run_path_option");
1358 Write_Line (" -v verbose mode");
1359 Write_Line (" -v -v very verbose mode");
1361 Write_Line (" -o nam Use 'nam' as the name of the executable");
1362 Write_Line (" -b target Compile the binder source to run on target");
1363 Write_Line (" -Bdir Load compiler executables from dir");
1365 if Is_Supported (Map_File) then
1366 Write_Line (" -Mmap Create map file map");
1367 Write_Line (" -M Create map file mainprog.map");
1370 Write_Line (" --GCC=comp Use comp as the compiler");
1371 Write_Line (" --LINK=nam Use 'nam' for the linking rather than 'gcc'");
1373 Write_Line (" [non-Ada-objects] list of non Ada object files");
1374 Write_Line (" [linker-options] other options for the linker");
1381 procedure Write_Header is
1383 if Verbose_Mode then
1385 Display_Version ("GNATLINK", "1995");
1393 procedure Write_Usage is
1399 -- Start of processing for Gnatlink
1402 -- Add the directory where gnatlink is invoked in front of the
1403 -- path, if gnatlink is invoked with directory information.
1404 -- Only do this if the platform is not VMS, where the notion of path
1405 -- does not really exist.
1407 if not Hostparm.OpenVMS then
1409 Command : constant String := Command_Name;
1412 for Index in reverse Command'Range loop
1413 if Command (Index) = Directory_Separator then
1415 Absolute_Dir : constant String :=
1417 (Command (Command'First .. Index));
1419 PATH : constant String :=
1422 Getenv ("PATH").all;
1425 Setenv ("PATH", PATH);
1436 if Argument_Count = 0
1438 (Verbose_Mode and then Argument_Count = 1)
1441 Exit_Program (E_Fatal);
1444 -- Get target parameters
1449 Osint.Add_Default_Search_Dirs;
1450 Targparm.Get_Target_Parameters;
1452 if VM_Target /= No_VM then
1454 when JVM_Target => Gcc := new String'("jgnat");
1455 when CLI_Target => Gcc := new String'("dotnet-gnatcompile");
1456 when No_VM => raise Program_Error;
1459 Ada_Bind_File := True;
1460 Begin_Info := "-- BEGIN Object file/option list";
1461 End_Info := "-- END Object file/option list ";
1464 -- We always compile with -c
1466 Binder_Options_From_ALI.Increment_Last;
1467 Binder_Options_From_ALI.Table (Binder_Options_From_ALI.Last) :=
1470 -- If the main program is in Ada it is compiled with the following
1473 -- -gnatA stops reading gnat.adc, since we don't know what
1474 -- pagmas would work, and we do not need it anyway.
1476 -- -gnatWb allows brackets coding for wide characters
1478 -- -gnatiw allows wide characters in identifiers. This is needed
1479 -- because bindgen uses brackets encoding for all upper
1480 -- half and wide characters in identifier names.
1482 if Ada_Bind_File then
1483 Binder_Options_From_ALI.Increment_Last;
1484 Binder_Options_From_ALI.Table (Binder_Options_From_ALI.Last) :=
1485 new String'("-gnatA");
1486 Binder_Options_From_ALI.Increment_Last;
1487 Binder_Options_From_ALI.Table (Binder_Options_From_ALI.Last) :=
1488 new String'("-gnatWb");
1489 Binder_Options_From_ALI.Increment_Last;
1490 Binder_Options_From_ALI.Table (Binder_Options_From_ALI.Last) :=
1491 new String'("-gnatiw");
1494 -- Locate all the necessary programs and verify required files are present
1496 Gcc_Path := System.OS_Lib.Locate_Exec_On_Path (Gcc.all);
1498 if Gcc_Path = null then
1499 Exit_With_Error ("Couldn't locate " & Gcc.all);
1502 if Linker_Path = null then
1503 if VM_Target = CLI_Target then
1504 Linker_Path := System.OS_Lib.Locate_Exec_On_Path ("ilasm");
1506 if Linker_Path = null then
1507 Exit_With_Error ("Couldn't locate ilasm");
1510 Linker_Path := Gcc_Path;
1514 if Ali_File_Name = null then
1515 Exit_With_Error ("no ali file given for link");
1518 if not Is_Regular_File (Ali_File_Name.all) then
1519 Exit_With_Error (Ali_File_Name.all & " not found");
1522 -- Read the ALI file of the main subprogram if the binder generated
1523 -- file needs to be compiled and no --GCC= switch has been specified.
1524 -- Fetch the back end switches from this ALI file and use these switches
1525 -- to compile the binder generated file
1527 if Compile_Bind_File and then Standard_Gcc then
1530 Name_Len := Ali_File_Name'Length;
1531 Name_Buffer (1 .. Name_Len) := Ali_File_Name.all;
1535 F : constant File_Name_Type := Name_Find;
1536 T : Text_Buffer_Ptr;
1540 -- Load the ALI file
1542 T := Read_Library_Info (F, True);
1544 -- Read it. Note that we ignore errors, since we only want very
1545 -- limited information from the ali file, and likely a slightly
1546 -- wrong version will be just fine, though in normal operation
1547 -- we don't expect this to happen!
1554 Ignore_Errors => True);
1556 if A /= No_ALI_Id then
1558 Index in Units.Table (ALIs.Table (A).First_Unit).First_Arg ..
1559 Units.Table (ALIs.Table (A).First_Unit).Last_Arg
1561 -- Do not compile with the front end switches. However, --RTS
1562 -- is to be dealt with specially because it needs to be passed
1563 -- if the binder-generated file is in Ada and may also be used
1564 -- to drive the linker.
1567 Arg : String_Ptr renames Args.Table (Index);
1569 if not Is_Front_End_Switch (Arg.all) then
1570 Binder_Options_From_ALI.Increment_Last;
1571 Binder_Options_From_ALI.Table
1572 (Binder_Options_From_ALI.Last) := String_Access (Arg);
1574 elsif Arg'Length > 5
1575 and then Arg (Arg'First + 2 .. Arg'First + 5) = "RTS="
1577 if Ada_Bind_File then
1578 Binder_Options_From_ALI.Increment_Last;
1579 Binder_Options_From_ALI.Table
1580 (Binder_Options_From_ALI.Last)
1581 := String_Access (Arg);
1584 -- GNAT doesn't support the GCC multilib mechanism.
1585 -- This means that, when a multilib switch is used
1586 -- to request a particular compilation mode, the
1587 -- corresponding runtime switch (--RTS) must also be
1588 -- specified. The long-term goal is to fully support the
1589 -- multilib mechanism; however, in the meantime, it is
1590 -- convenient to eliminate the redundancy by keying the
1591 -- compilation mode on a single switch, namely --RTS.
1593 -- Pass -mrtp to the linker if --RTS=rtp was passed
1595 if Linker_Path = Gcc_Path
1596 and then Arg'Length > 8
1597 and then Arg (Arg'First + 6 .. Arg'First + 8) = "rtp"
1599 Linker_Options.Increment_Last;
1600 Linker_Options.Table (Linker_Options.Last) :=
1601 new String'("-mrtp");
1603 -- Pass -fsjlj to the linker if --RTS=sjlj was passed
1605 elsif Linker_Path = Gcc_Path
1606 and then Arg'Length > 9
1607 and then Arg (Arg'First + 6 .. Arg'First + 9) = "sjlj"
1609 Linker_Options.Increment_Last;
1610 Linker_Options.Table (Linker_Options.Last) :=
1611 new String'("-fsjlj");
1622 -- If no output name specified, then use the base name of .ali file name
1624 if Output_File_Name = null then
1626 new String'(Base_Name (Ali_File_Name.all)
1627 & Get_Target_Debuggable_Suffix.all);
1629 if VM_Target = CLI_Target then
1630 Linker_Options.Increment_Last;
1631 Linker_Options.Table (Linker_Options.Last) := new String'("/QUIET");
1633 Linker_Options.Increment_Last;
1634 Linker_Options.Table (Linker_Options.Last) := new String'("/DEBUG");
1636 Linker_Options.Increment_Last;
1637 Linker_Options.Table (Linker_Options.Last) :=
1638 new String'("/OUTPUT=" & Output_File_Name.all);
1641 Linker_Options.Increment_Last;
1642 Linker_Options.Table (Linker_Options.Last) := new String'("-o");
1644 Linker_Options.Increment_Last;
1645 Linker_Options.Table (Linker_Options.Last) :=
1646 new String'(Output_File_Name.all);
1650 -- Warn if main program is called "test", as that may be a built-in command
1651 -- on Unix. On non-Unix systems executables have a suffix, so the warning
1652 -- will not appear. However, do not warn in the case of a cross compiler.
1654 -- Assume this is a cross tool if the executable name is not gnatlink
1656 if Base_Name (Command_Name) = "gnatlink"
1657 and then Output_File_Name.all = "test"
1659 Error_Msg ("warning: executable name """ & Output_File_Name.all
1660 & """ may conflict with shell command");
1663 -- If -M switch was specified, add the switches to create the map file
1665 if Create_Map_File then
1667 Map_Name : constant String := Base_Name (Ali_File_Name.all) & ".map";
1668 Switches : String_List_Access;
1671 Convert (Map_File, Map_Name, Switches);
1673 if Switches /= null then
1674 for J in Switches'Range loop
1675 Linker_Options.Increment_Last;
1676 Linker_Options.Table (Linker_Options.Last) := Switches (J);
1682 -- Perform consistency checks
1684 -- Transform the .ali file name into the binder output file name
1686 Make_Binder_File_Names : declare
1687 Fname : constant String := Base_Name (Ali_File_Name.all);
1688 Fname_Len : Integer := Fname'Length;
1690 function Get_Maximum_File_Name_Length return Integer;
1691 pragma Import (C, Get_Maximum_File_Name_Length,
1692 "__gnat_get_maximum_file_name_length");
1694 Maximum_File_Name_Length : constant Integer :=
1695 Get_Maximum_File_Name_Length;
1697 Bind_File_Prefix : Types.String_Ptr;
1698 -- Contains prefix used for bind files
1703 if not Ada_Bind_File then
1704 Bind_File_Prefix := new String'("b_");
1705 elsif OpenVMS_On_Target then
1706 Bind_File_Prefix := new String'("b__");
1708 Bind_File_Prefix := new String'("b~");
1711 -- If the length of the binder file becomes too long due to
1712 -- the addition of the "b?" prefix, then truncate it.
1714 if Maximum_File_Name_Length > 0 then
1716 Maximum_File_Name_Length - Bind_File_Prefix.all'Length
1718 Fname_Len := Fname_Len - 1;
1723 Fnam : constant String :=
1724 Bind_File_Prefix.all &
1725 Fname (Fname'First .. Fname'First + Fname_Len - 1);
1728 if Ada_Bind_File then
1729 Binder_Spec_Src_File := new String'(Fnam & ".ads");
1730 Binder_Body_Src_File := new String'(Fnam & ".adb");
1731 Binder_Ali_File := new String'(Fnam & ".ali");
1733 Binder_Body_Src_File := new String'(Fnam & ".c");
1736 Binder_Obj_File := new String'(Fnam & Get_Target_Object_Suffix.all);
1739 if Fname_Len /= Fname'Length then
1740 Binder_Options.Increment_Last;
1741 Binder_Options.Table (Binder_Options.Last) := new String'("-o");
1742 Binder_Options.Increment_Last;
1743 Binder_Options.Table (Binder_Options.Last) := Binder_Obj_File;
1745 end Make_Binder_File_Names;
1747 Process_Binder_File (Binder_Body_Src_File.all & ASCII.NUL);
1749 -- Compile the binder file. This is fast, so we always do it, unless
1750 -- specifically told not to by the -n switch
1752 if Compile_Bind_File then
1755 Args : Argument_List
1756 (1 .. Binder_Options_From_ALI.Last + Binder_Options.Last + 1);
1759 for J in 1 .. Binder_Options_From_ALI.Last loop
1760 Args (J) := Binder_Options_From_ALI.Table (J);
1763 for J in 1 .. Binder_Options.Last loop
1764 Args (Binder_Options_From_ALI.Last + J) :=
1765 Binder_Options.Table (J);
1768 Args (Args'Last) := Binder_Body_Src_File;
1770 if Verbose_Mode then
1771 Write_Str (Base_Name (Gcc_Path.all));
1773 for J in Args'Range loop
1775 Write_Str (Args (J).all);
1781 System.OS_Lib.Spawn (Gcc_Path.all, Args, Success);
1784 Exit_Program (E_Fatal);
1789 -- Now, actually link the program
1791 -- Skip this step for now on JVM since the Java interpreter will do
1792 -- the actual link at run time. We might consider packing all class files
1793 -- in a .zip file during this step.
1795 if VM_Target /= JVM_Target then
1797 Num_Args : Natural :=
1798 (Linker_Options.Last - Linker_Options.First + 1) +
1799 (Gcc_Linker_Options.Last - Gcc_Linker_Options.First + 1) +
1800 (Linker_Objects.Last - Linker_Objects.First + 1);
1801 Stack_Op : Boolean := False;
1802 IDENT_Op : Boolean := False;
1805 if VM_Target = CLI_Target then
1807 -- Remove extraneous flags not relevant for CIL. Also remove empty
1808 -- arguments, since ilasm chokes on them.
1810 for J in reverse Linker_Options.First .. Linker_Options.Last loop
1811 if Linker_Options.Table (J)'Length = 0
1812 or else Linker_Options.Table (J) (1 .. 2) = "-L"
1813 or else Linker_Options.Table (J) (1 .. 2) = "-l"
1814 or else Linker_Options.Table (J) (1 .. 3) = "-Wl"
1815 or else Linker_Options.Table (J) (1 .. 3) = "-sh"
1816 or else Linker_Options.Table (J) (1 .. 2) = "-g"
1818 Linker_Options.Table (J .. Linker_Options.Last - 1) :=
1819 Linker_Options.Table (J + 1 .. Linker_Options.Last);
1820 Linker_Options.Decrement_Last;
1821 Num_Args := Num_Args - 1;
1826 -- Remove duplicate stack size setting from the Linker_Options
1827 -- table. The stack setting option "-Xlinker --stack=R,C" can be
1828 -- found in one line when set by a pragma Linker_Options or in two
1829 -- lines ("-Xlinker" then "--stack=R,C") when set on the command
1830 -- line. We also check for the "-Wl,--stack=R" style option.
1832 -- We must remove the second stack setting option instance
1833 -- because the one on the command line will always be the first
1834 -- one. And any subsequent stack setting option will overwrite the
1835 -- previous one. This is done especially for GNAT/NT where we set
1836 -- the stack size for tasking programs by a pragma in the NT
1837 -- specific tasking package System.Task_Primitives.Oparations.
1839 -- Note: This is not a FOR loop that runs from Linker_Options.First
1840 -- to Linker_Options.Last, since operations within the loop can
1841 -- modify the length of the table.
1843 Clean_Link_Option_Set : declare
1844 J : Natural := Linker_Options.First;
1845 Shared_Libgcc_Seen : Boolean := False;
1848 while J <= Linker_Options.Last loop
1850 if Linker_Options.Table (J).all = "-Xlinker"
1851 and then J < Linker_Options.Last
1852 and then Linker_Options.Table (J + 1)'Length > 8
1853 and then Linker_Options.Table (J + 1) (1 .. 8) = "--stack="
1856 Linker_Options.Table (J .. Linker_Options.Last - 2) :=
1857 Linker_Options.Table (J + 2 .. Linker_Options.Last);
1858 Linker_Options.Decrement_Last;
1859 Linker_Options.Decrement_Last;
1860 Num_Args := Num_Args - 2;
1867 -- Remove duplicate -shared-libgcc switch
1869 if Linker_Options.Table (J).all = Shared_Libgcc_String then
1870 if Shared_Libgcc_Seen then
1871 Linker_Options.Table (J .. Linker_Options.Last - 1) :=
1872 Linker_Options.Table (J + 1 .. Linker_Options.Last);
1873 Linker_Options.Decrement_Last;
1874 Num_Args := Num_Args - 1;
1877 Shared_Libgcc_Seen := True;
1881 -- Here we just check for a canonical form that matches the
1882 -- pragma Linker_Options set in the NT runtime.
1884 if (Linker_Options.Table (J)'Length > 17
1885 and then Linker_Options.Table (J) (1 .. 17)
1886 = "-Xlinker --stack=")
1888 (Linker_Options.Table (J)'Length > 12
1889 and then Linker_Options.Table (J) (1 .. 12)
1893 Linker_Options.Table (J .. Linker_Options.Last - 1) :=
1894 Linker_Options.Table (J + 1 .. Linker_Options.Last);
1895 Linker_Options.Decrement_Last;
1896 Num_Args := Num_Args - 1;
1903 -- Remove duplicate IDENTIFICATION directives (VMS)
1905 if Linker_Options.Table (J)'Length > 27
1906 and then Linker_Options.Table (J) (1 .. 28)
1907 = "--for-linker=IDENTIFICATION="
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;
1922 if Linker_Path = Gcc_Path and then VM_Target = No_VM then
1924 -- If gcc is not called with -shared-libgcc, call it with
1925 -- -static-libgcc, as there are some platforms where one of
1926 -- these two switches is compulsory to link.
1928 if not Shared_Libgcc_Seen then
1929 Linker_Options.Increment_Last;
1930 Linker_Options.Table (Linker_Options.Last) := Static_Libgcc;
1931 Num_Args := Num_Args + 1;
1935 end Clean_Link_Option_Set;
1937 -- Prepare arguments for call to linker
1939 Call_Linker : declare
1941 Args : Argument_List (1 .. Num_Args + 1);
1942 Index : Integer := Args'First;
1945 Args (Index) := Binder_Obj_File;
1947 -- Add the object files and any -largs libraries
1949 for J in Linker_Objects.First .. Linker_Objects.Last loop
1951 Args (Index) := Linker_Objects.Table (J);
1954 -- Add the linker options from the binder file
1956 for J in Linker_Options.First .. Linker_Options.Last loop
1958 Args (Index) := Linker_Options.Table (J);
1961 -- Finally add the libraries from the --GCC= switch
1963 for J in Gcc_Linker_Options.First .. Gcc_Linker_Options.Last loop
1965 Args (Index) := Gcc_Linker_Options.Table (J);
1968 if Verbose_Mode then
1969 Write_Str (Linker_Path.all);
1971 for J in Args'Range loop
1973 Write_Str (Args (J).all);
1978 -- If we are on very verbose mode (-v -v) and a response file
1979 -- is used we display its content.
1981 if Very_Verbose_Mode and then Tname_FD /= Invalid_FD then
1983 Write_Str ("Response file (" &
1984 Tname (Tname'First .. Tname'Last - 1) &
1989 Response_File_Objects.First ..
1990 Response_File_Objects.Last
1992 Write_Str (Response_File_Objects.Table (J).all);
2000 System.OS_Lib.Spawn (Linker_Path.all, Args, Success);
2002 -- Delete the temporary file used in conjuction with linking if
2003 -- one was created. See Process_Bind_File for details.
2005 if Tname_FD /= Invalid_FD then
2010 Error_Msg ("error when calling " & Linker_Path.all);
2011 Exit_Program (E_Fatal);
2017 -- Only keep the binder output file and it's associated object
2018 -- file if compiling with the -g option. These files are only
2019 -- useful if debugging.
2021 if not Debug_Flag_Present then
2022 if Binder_Ali_File /= null then
2023 Delete (Binder_Ali_File.all & ASCII.NUL);
2026 if Binder_Spec_Src_File /= null then
2027 Delete (Binder_Spec_Src_File.all & ASCII.NUL);
2030 Delete (Binder_Body_Src_File.all & ASCII.NUL);
2032 if VM_Target = No_VM then
2033 Delete (Binder_Obj_File.all & ASCII.NUL);
2037 Exit_Program (E_Success);
2041 Write_Line (Exception_Information (X));
2042 Exit_With_Error ("INTERNAL ERROR. Please report");