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8sa1-gcc/gcc/ada/gnatlink.adb
Geoffrey Keating 6cbcc54138 Delete all lines containing "$Revision:". 
* xeinfo.adb: Don't look for revision numbers.
	* xnmake.adb: Likewise.
	* xsinfo.adb: Likewise.
	* xsnames.adb: Likewise.
	* xtreeprs.adb: Likewise.

From-SVN: r50768
2002-03-14 11:00:22 +00:00

1409 lines
49 KiB
Ada
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------------------------------------------------------------------------------
-- --
-- GNAT COMPILER COMPONENTS --
-- --
-- G N A T L I N K --
-- --
-- B o d y --
-- --
-- --
-- Copyright (C) 1996-2002 Free Software Foundation, Inc. --
-- --
-- GNAT is free software; you can redistribute it and/or modify it under --
-- terms of the GNU General Public License as published by the Free Soft- --
-- ware Foundation; either version 2, or (at your option) any later ver- --
-- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
-- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
-- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License --
-- for more details. You should have received a copy of the GNU General --
-- Public License distributed with GNAT; see file COPYING. If not, write --
-- to the Free Software Foundation, 59 Temple Place - Suite 330, Boston, --
-- MA 02111-1307, USA. --
-- --
-- GNAT was originally developed by the GNAT team at New York University. --
-- It is now maintained by Ada Core Technologies Inc (http://www.gnat.com). --
-- --
------------------------------------------------------------------------------
-- Gnatlink usage: please consult the gnat documentation
with Ada.Exceptions; use Ada.Exceptions;
with ALI; use ALI;
with Gnatvsn; use Gnatvsn;
with Hostparm;
with Namet; use Namet;
with Osint; use Osint;
with Output; use Output;
with Switch; use Switch;
with System; use System;
with Table;
with Types;
with Ada.Command_Line; use Ada.Command_Line;
with GNAT.OS_Lib; use GNAT.OS_Lib;
with Interfaces.C_Streams; use Interfaces.C_Streams;
procedure Gnatlink is
pragma Ident (Gnat_Version_String);
package Gcc_Linker_Options is new Table.Table (
Table_Component_Type => String_Access,
Table_Index_Type => Integer,
Table_Low_Bound => 1,
Table_Initial => 20,
Table_Increment => 100,
Table_Name => "Gnatlink.Gcc_Linker_Options");
-- Comments needed ???
package Libpath is new Table.Table (
Table_Component_Type => Character,
Table_Index_Type => Integer,
Table_Low_Bound => 1,
Table_Initial => 4096,
Table_Increment => 2,
Table_Name => "Gnatlink.Libpath");
-- Comments needed ???
package Linker_Options is new Table.Table (
Table_Component_Type => String_Access,
Table_Index_Type => Integer,
Table_Low_Bound => 1,
Table_Initial => 20,
Table_Increment => 100,
Table_Name => "Gnatlink.Linker_Options");
-- Comments needed ???
package Linker_Objects is new Table.Table (
Table_Component_Type => String_Access,
Table_Index_Type => Integer,
Table_Low_Bound => 1,
Table_Initial => 20,
Table_Increment => 100,
Table_Name => "Gnatlink.Linker_Objects");
-- This table collects the objects file to be passed to the linker. In the
-- case where the linker command line is too long then programs objects
-- are put on the Response_File_Objects table. Note that the binder object
-- file and the user's objects remain in this table. This is very
-- important because on the GNU linker command line the -L switch is not
-- used to look for objects files but -L switch is used to look for
-- objects listed in the response file. This is not a problem with the
-- applications objects as they are specified with a fullname.
package Response_File_Objects is new Table.Table (
Table_Component_Type => String_Access,
Table_Index_Type => Integer,
Table_Low_Bound => 1,
Table_Initial => 20,
Table_Increment => 100,
Table_Name => "Gnatlink.Response_File_Objects");
-- This table collects the objects file that are to be put in the response
-- file. Only application objects are collected there (see details in
-- Linker_Objects table comments)
package Binder_Options_From_ALI is new Table.Table (
Table_Component_Type => String_Access,
Table_Index_Type => Integer,
Table_Low_Bound => 1, -- equals low bound of Argument_List for Spawn
Table_Initial => 20,
Table_Increment => 100,
Table_Name => "Gnatlink.Binder_Options_From_ALI");
-- This table collects the switches from the ALI file of the main
-- subprogram.
package Binder_Options is new Table.Table (
Table_Component_Type => String_Access,
Table_Index_Type => Integer,
Table_Low_Bound => 1, -- equals low bound of Argument_List for Spawn
Table_Initial => 20,
Table_Increment => 100,
Table_Name => "Gnatlink.Binder_Options");
-- This table collects the arguments to be passed to compile the binder
-- generated file.
subtype chars_ptr is System.Address;
Gcc : String_Access := Program_Name ("gcc");
Read_Mode : constant String := "r" & ASCII.Nul;
Begin_Info : String := "-- BEGIN Object file/option list";
End_Info : String := "-- END Object file/option list ";
-- Note: above lines are modified in C mode, see option processing
Gcc_Path : String_Access;
Linker_Path : String_Access;
Output_File_Name : String_Access;
Ali_File_Name : String_Access;
Binder_Spec_Src_File : String_Access;
Binder_Body_Src_File : String_Access;
Binder_Ali_File : String_Access;
Binder_Obj_File : String_Access;
Tname : Temp_File_Name;
Tname_FD : File_Descriptor := Invalid_FD;
-- Temporary file used by linker to pass list of object files on
-- certain systems with limitations on size of arguments.
Debug_Flag_Present : Boolean := False;
Verbose_Mode : Boolean := False;
Very_Verbose_Mode : Boolean := False;
Ada_Bind_File : Boolean := True;
-- Set to True if bind file is generated in Ada
Standard_Gcc : Boolean := True;
Compile_Bind_File : Boolean := True;
-- Set to False if bind file is not to be compiled
Object_List_File_Supported : Boolean;
pragma Import (C, Object_List_File_Supported, "objlist_file_supported");
-- Predicate indicating whether the linker has an option whereby the
-- names of object files can be passed to the linker in a file.
Object_List_File_Required : Boolean := False;
-- Set to True to force generation of a response file
function Base_Name (File_Name : in String) return String;
-- Return just the file name part without the extension (if present).
procedure Delete (Name : in String);
-- Wrapper to unlink as status is ignored by this application.
procedure Error_Msg (Message : in String);
-- Output the error or warning Message
procedure Exit_With_Error (Error : in String);
-- Output Error and exit program with a fatal condition.
procedure Process_Args;
-- Go through all the arguments and build option tables.
procedure Process_Binder_File (Name : in String);
-- Reads the binder file and extracts linker arguments.
function Value (chars : chars_ptr) return String;
-- Return NUL-terminated string chars as an Ada string.
procedure Write_Usage;
-- Show user the program options.
---------------
-- Base_Name --
---------------
function Base_Name (File_Name : in String) return String is
Findex1 : Natural;
Findex2 : Natural;
begin
Findex1 := File_Name'First;
-- The file might be specified by a full path name. However,
-- we want the path to be stripped away.
for J in reverse File_Name'Range loop
if Is_Directory_Separator (File_Name (J)) then
Findex1 := J + 1;
exit;
end if;
end loop;
Findex2 := File_Name'Last;
while Findex2 > Findex1
and then File_Name (Findex2) /= '.'
loop
Findex2 := Findex2 - 1;
end loop;
if Findex2 = Findex1 then
Findex2 := File_Name'Last + 1;
end if;
return File_Name (Findex1 .. Findex2 - 1);
end Base_Name;
------------
-- Delete --
------------
procedure Delete (Name : in String) is
Status : int;
begin
Status := unlink (Name'Address);
end Delete;
---------------
-- Error_Msg --
---------------
procedure Error_Msg (Message : in String) is
begin
Write_Str (Base_Name (Command_Name));
Write_Str (": ");
Write_Str (Message);
Write_Eol;
end Error_Msg;
---------------------
-- Exit_With_Error --
---------------------
procedure Exit_With_Error (Error : in String) is
begin
Error_Msg (Error);
Exit_Program (E_Fatal);
end Exit_With_Error;
------------------
-- Process_Args --
------------------
procedure Process_Args is
Next_Arg : Integer;
begin
-- Loop through arguments of gnatlink command
Next_Arg := 1;
loop
exit when Next_Arg > Argument_Count;
Process_One_Arg : declare
Arg : String := Argument (Next_Arg);
begin
-- Case of argument which is a switch
-- We definitely need section by section comments here ???
if Arg'Length /= 0 and then Arg (1) = '-' then
if Arg'Length > 4
and then Arg (2 .. 5) = "gnat"
then
Exit_With_Error
("invalid switch: """ & Arg & """ (gnat not needed here)");
end if;
if Arg (2) = 'g'
and then (Arg'Length < 5 or else Arg (2 .. 5) /= "gnat")
then
Debug_Flag_Present := True;
Linker_Options.Increment_Last;
Linker_Options.Table (Linker_Options.Last) :=
new String'(Arg);
Binder_Options.Increment_Last;
Binder_Options.Table (Binder_Options.Last) :=
Linker_Options.Table (Linker_Options.Last);
elsif Arg'Length = 2 then
case Arg (2) is
when 'A' =>
Ada_Bind_File := True;
Begin_Info := "-- BEGIN Object file/option list";
End_Info := "-- END Object file/option list ";
when 'b' =>
Linker_Options.Increment_Last;
Linker_Options.Table (Linker_Options.Last) :=
new String'(Arg);
Binder_Options.Increment_Last;
Binder_Options.Table (Binder_Options.Last) :=
Linker_Options.Table (Linker_Options.Last);
Next_Arg := Next_Arg + 1;
if Next_Arg > Argument_Count then
Exit_With_Error ("Missing argument for -b");
end if;
Get_Machine_Name : declare
Name_Arg : String_Access :=
new String'(Argument (Next_Arg));
begin
Linker_Options.Increment_Last;
Linker_Options.Table (Linker_Options.Last) :=
Name_Arg;
Binder_Options.Increment_Last;
Binder_Options.Table (Binder_Options.Last) :=
Name_Arg;
end Get_Machine_Name;
when 'C' =>
Ada_Bind_File := False;
Begin_Info := "/* BEGIN Object file/option list";
End_Info := " END Object file/option list */";
when 'f' =>
if Object_List_File_Supported then
Object_List_File_Required := True;
else
Exit_With_Error
("Object list file not supported on this target");
end if;
when 'n' =>
Compile_Bind_File := False;
when 'o' =>
Linker_Options.Increment_Last;
Linker_Options.Table (Linker_Options.Last) :=
new String'(Arg);
Next_Arg := Next_Arg + 1;
if Next_Arg > Argument_Count then
Exit_With_Error ("Missing argument for -o");
end if;
Output_File_Name := new String'(Argument (Next_Arg));
Linker_Options.Increment_Last;
Linker_Options.Table (Linker_Options.Last) :=
Output_File_Name;
when 'v' =>
-- Support "double" verbose mode. Second -v
-- gets sent to the linker and binder phases.
if Verbose_Mode then
Very_Verbose_Mode := True;
Linker_Options.Increment_Last;
Linker_Options.Table (Linker_Options.Last) :=
new String'(Arg);
Binder_Options.Increment_Last;
Binder_Options.Table (Binder_Options.Last) :=
Linker_Options.Table (Linker_Options.Last);
else
Verbose_Mode := True;
end if;
when others =>
Linker_Options.Increment_Last;
Linker_Options.Table (Linker_Options.Last) :=
new String'(Arg);
end case;
elsif Arg (2) = 'B' then
Linker_Options.Increment_Last;
Linker_Options.Table (Linker_Options.Last) :=
new String'(Arg);
Binder_Options.Increment_Last;
Binder_Options.Table (Binder_Options.Last) :=
Linker_Options.Table (Linker_Options.Last);
elsif Arg'Length >= 7 and then Arg (1 .. 7) = "--LINK=" then
if Arg'Length = 7 then
Exit_With_Error ("Missing argument for --LINK=");
end if;
Linker_Path :=
GNAT.OS_Lib.Locate_Exec_On_Path (Arg (8 .. Arg'Last));
if Linker_Path = null then
Exit_With_Error
("Could not locate linker: " & Arg (8 .. Arg'Last));
end if;
elsif Arg'Length > 6 and then Arg (1 .. 6) = "--GCC=" then
declare
Program_Args : Argument_List_Access :=
Argument_String_To_List
(Arg (7 .. Arg'Last));
begin
Gcc := new String'(Program_Args.all (1).all);
Standard_Gcc := False;
-- Set appropriate flags for switches passed
for J in 2 .. Program_Args.all'Last loop
declare
Arg : String := Program_Args.all (J).all;
AF : Integer := Arg'First;
begin
if Arg'Length /= 0 and then Arg (AF) = '-' then
if Arg (AF + 1) = 'g'
and then (Arg'Length = 2
or else Arg (AF + 2) in '0' .. '3'
or else Arg (AF + 2 .. Arg'Last) = "coff")
then
Debug_Flag_Present := True;
end if;
end if;
-- Pass to gcc for compiling binder generated file
-- No use passing libraries, it will just generate
-- a warning
if not (Arg (AF .. AF + 1) = "-l"
or else Arg (AF .. AF + 1) = "-L")
then
Binder_Options.Increment_Last;
Binder_Options.Table (Binder_Options.Last) :=
new String'(Arg);
end if;
-- Pass to gcc for linking program.
Gcc_Linker_Options.Increment_Last;
Gcc_Linker_Options.Table
(Gcc_Linker_Options.Last) := new String'(Arg);
end;
end loop;
end;
-- Send all multi-character switches not recognized as
-- a special case by gnatlink to the linker/loader stage.
else
Linker_Options.Increment_Last;
Linker_Options.Table (Linker_Options.Last) :=
new String'(Arg);
end if;
-- Here if argument is a file name rather than a switch
else
if Arg'Length > 4
and then Arg (Arg'Last - 3 .. Arg'Last) = ".ali"
then
if Ali_File_Name = null then
Ali_File_Name := new String'(Arg);
else
Exit_With_Error ("cannot handle more than one ALI file");
end if;
elsif Is_Regular_File (Arg & ".ali")
and then Ali_File_Name = null
then
Ali_File_Name := new String'(Arg & ".ali");
elsif Arg'Length > Get_Object_Suffix.all'Length
and then Arg
(Arg'Last - Get_Object_Suffix.all'Length + 1 .. Arg'Last)
= Get_Object_Suffix.all
then
Linker_Objects.Increment_Last;
Linker_Objects.Table (Linker_Objects.Last) :=
new String'(Arg);
else
Linker_Options.Increment_Last;
Linker_Options.Table (Linker_Options.Last) :=
new String'(Arg);
end if;
end if;
end Process_One_Arg;
Next_Arg := Next_Arg + 1;
end loop;
-- If Ada bind file, then compile it with warnings suppressed, because
-- otherwise the with of the main program may cause junk warnings.
if Ada_Bind_File then
Binder_Options.Increment_Last;
Binder_Options.Table (Binder_Options.Last) := new String'("-gnatws");
end if;
end Process_Args;
-------------------------
-- Process_Binder_File --
-------------------------
procedure Process_Binder_File (Name : in String) is
Fd : FILEs;
Link_Bytes : Integer := 0;
Link_Max : Integer;
pragma Import (C, Link_Max, "link_max");
Next_Line : String (1 .. 1000);
Nlast : Integer;
Nfirst : Integer;
Objs_Begin : Integer := 0;
Objs_End : Integer := 0;
Status : int;
N : Integer;
GNAT_Static : Boolean := False;
-- Save state of -static option.
GNAT_Shared : Boolean := False;
-- Save state of -shared option.
Run_Path_Option_Ptr : Address;
pragma Import (C, Run_Path_Option_Ptr, "run_path_option");
-- Pointer to string representing the native linker option which
-- specifies the path where the dynamic loader should find shared
-- libraries. Equal to null string if this system doesn't support it.
Object_Library_Ext_Ptr : Address;
pragma Import (C, Object_Library_Ext_Ptr, "object_library_extension");
-- Pointer to string specifying the default extension for
-- object libraries, e.g. Unix uses ".a", VMS uses ".olb".
Object_File_Option_Ptr : Address;
pragma Import (C, Object_File_Option_Ptr, "object_file_option");
-- Pointer to a string representing the linker option which specifies
-- the response file.
Using_GNU_Linker : Boolean;
pragma Import (C, Using_GNU_Linker, "using_gnu_linker");
-- Predicate indicating whether this target uses the GNU linker. In
-- this case we must output a GNU linker compatible response file.
procedure Get_Next_Line;
-- Read the next line from the binder file without the line
-- terminator.
function Is_Option_Present (Opt : in String) return Boolean;
-- Return true if the option Opt is already present in
-- Linker_Options table.
procedure Get_Next_Line is
Fchars : chars;
begin
Fchars := fgets (Next_Line'Address, Next_Line'Length, Fd);
if Fchars = System.Null_Address then
Exit_With_Error ("Error reading binder output");
end if;
Nfirst := Next_Line'First;
Nlast := Nfirst;
while Nlast <= Next_Line'Last
and then Next_Line (Nlast) /= ASCII.LF
and then Next_Line (Nlast) /= ASCII.CR
loop
Nlast := Nlast + 1;
end loop;
Nlast := Nlast - 1;
end Get_Next_Line;
function Is_Option_Present (Opt : in String) return Boolean is
begin
for I in 1 .. Linker_Options.Last loop
if Linker_Options.Table (I).all = Opt then
return True;
end if;
end loop;
return False;
end Is_Option_Present;
-- Start of processing for Process_Binder_File
begin
Fd := fopen (Name'Address, Read_Mode'Address);
if Fd = NULL_Stream then
Exit_With_Error ("Failed to open binder output");
end if;
-- Skip up to the Begin Info line
loop
Get_Next_Line;
exit when Next_Line (Nfirst .. Nlast) = Begin_Info;
end loop;
loop
Get_Next_Line;
-- Go to end when end line is reached (this will happen in
-- No_Run_Time mode where no -L switches are generated)
exit when Next_Line (Nfirst .. Nlast) = End_Info;
if Ada_Bind_File then
Next_Line (Nfirst .. Nlast - 8) :=
Next_Line (Nfirst + 8 .. Nlast);
Nlast := Nlast - 8;
end if;
-- Go to next section when switches are reached
exit when Next_Line (1) = '-';
-- Otherwise we have another object file to collect
Linker_Objects.Increment_Last;
-- Mark the positions of first and last object files in case
-- they need to be placed with a named file on systems having
-- linker line limitations.
if Objs_Begin = 0 then
Objs_Begin := Linker_Objects.Last;
end if;
Linker_Objects.Table (Linker_Objects.Last) :=
new String'(Next_Line (Nfirst .. Nlast));
Link_Bytes := Link_Bytes + Nlast - Nfirst;
end loop;
Objs_End := Linker_Objects.Last;
-- On systems that have limitations on handling very long linker lines
-- we make use of the system linker option which takes a list of object
-- file names from a file instead of the command line itself. What we do
-- is to replace the list of object files by the special linker option
-- which then reads the object file list from a file instead. The option
-- to read from a file instead of the command line is only triggered if
-- a conservative threshold is passed.
if Object_List_File_Required
or else (Object_List_File_Supported
and then Link_Bytes > Link_Max)
then
-- Create a temporary file containing the Ada user object files
-- needed by the link. This list is taken from the bind file
-- and is output one object per line for maximal compatibility with
-- linkers supporting this option.
Create_Temp_File (Tname_FD, Tname);
-- If target is using the GNU linker we must add a special header
-- and footer in the response file.
-- The syntax is : INPUT (object1.o object2.o ... )
if Using_GNU_Linker then
declare
GNU_Header : aliased constant String := "INPUT (";
begin
Status := Write (Tname_FD, GNU_Header'Address,
GNU_Header'Length);
end;
end if;
for J in Objs_Begin .. Objs_End loop
Status := Write (Tname_FD, Linker_Objects.Table (J).all'Address,
Linker_Objects.Table (J).all'Length);
Status := Write (Tname_FD, ASCII.LF'Address, 1);
Response_File_Objects.Increment_Last;
Response_File_Objects.Table (Response_File_Objects.Last) :=
Linker_Objects.Table (J);
end loop;
-- handle GNU linker response file footer.
if Using_GNU_Linker then
declare
GNU_Footer : aliased constant String := ")";
begin
Status := Write (Tname_FD, GNU_Footer'Address,
GNU_Footer'Length);
end;
end if;
Close (Tname_FD);
-- Add the special objects list file option together with the name
-- of the temporary file (removing the null character) to the objects
-- file table.
Linker_Objects.Table (Objs_Begin) :=
new String'(Value (Object_File_Option_Ptr) &
Tname (Tname'First .. Tname'Last - 1));
-- The slots containing these object file names are then removed
-- from the objects table so they do not appear in the link. They
-- are removed by moving up the linker options and non-Ada object
-- files appearing after the Ada object list in the table.
N := Objs_End - Objs_Begin + 1;
for J in Objs_End + 1 .. Linker_Objects.Last loop
Linker_Objects.Table (J - N + 1) := Linker_Objects.Table (J);
end loop;
Linker_Objects.Set_Last (Linker_Objects.Last - N + 1);
end if;
-- Process switches and options
if Next_Line (Nfirst .. Nlast) /= End_Info then
loop
if Next_Line (Nfirst .. Nlast) = "-static" then
GNAT_Static := True;
elsif Next_Line (Nfirst .. Nlast) = "-shared" then
GNAT_Shared := True;
-- Add binder options only if not already set on the command
-- line. This rule is a way to control the linker options order.
elsif not Is_Option_Present (Next_Line (Nfirst .. Nlast)) then
if Nlast > Nfirst + 2 and then
Next_Line (Nfirst .. Nfirst + 1) = "-L"
then
-- Construct a library search path for use later
-- to locate static gnatlib libraries.
if Libpath.Last > 1 then
Libpath.Increment_Last;
Libpath.Table (Libpath.Last) := Path_Separator;
end if;
for I in Nfirst + 2 .. Nlast loop
Libpath.Increment_Last;
Libpath.Table (Libpath.Last) := Next_Line (I);
end loop;
Linker_Options.Increment_Last;
Linker_Options.Table (Linker_Options.Last) :=
new String'(Next_Line (Nfirst .. Nlast));
elsif Next_Line (Nfirst .. Nlast) = "-ldecgnat"
or else Next_Line (Nfirst .. Nlast) = "-lgnarl"
or else Next_Line (Nfirst .. Nlast) = "-lgnat"
then
-- Given a Gnat standard library, search the
-- library path to find the library location
declare
File_Path : String_Access;
Object_Lib_Extension : constant String :=
Value (Object_Library_Ext_Ptr);
File_Name : String := "lib" &
Next_Line (Nfirst + 2 .. Nlast) & Object_Lib_Extension;
begin
File_Path :=
Locate_Regular_File (File_Name,
String (Libpath.Table (1 .. Libpath.Last)));
if File_Path /= null then
if GNAT_Static then
-- If static gnatlib found, explicitly
-- specify to overcome possible linker
-- default usage of shared version.
Linker_Options.Increment_Last;
Linker_Options.Table (Linker_Options.Last) :=
new String'(File_Path.all);
elsif GNAT_Shared then
-- If shared gnatlib desired, add the
-- appropriate system specific switch
-- so that it can be located at runtime.
declare
Run_Path_Opt : constant String :=
Value (Run_Path_Option_Ptr);
begin
if Run_Path_Opt'Length /= 0 then
-- Output the system specific linker
-- command that allows the image
-- activator to find the shared library
-- at runtime.
Linker_Options.Increment_Last;
Linker_Options.Table (Linker_Options.Last)
:= new String'(Run_Path_Opt
& File_Path
(1 .. File_Path'Length
- File_Name'Length));
end if;
Linker_Options.Increment_Last;
Linker_Options.Table (Linker_Options.Last)
:= new String'(Next_Line (Nfirst .. Nlast));
end;
end if;
else
-- If gnatlib library not found, then
-- add it anyway in case some other
-- mechanimsm may find it.
Linker_Options.Increment_Last;
Linker_Options.Table (Linker_Options.Last)
:= new String'(Next_Line (Nfirst .. Nlast));
end if;
end;
else
Linker_Options.Increment_Last;
Linker_Options.Table (Linker_Options.Last)
:= new String'(Next_Line (Nfirst .. Nlast));
end if;
end if;
Get_Next_Line;
exit when Next_Line (Nfirst .. Nlast) = End_Info;
if Ada_Bind_File then
Next_Line (Nfirst .. Nlast - 8)
:= Next_Line (Nfirst + 8 .. Nlast);
Nlast := Nlast - 8;
end if;
end loop;
end if;
Status := fclose (Fd);
end Process_Binder_File;
-----------
-- Value --
-----------
function Value (chars : chars_ptr) return String is
function Strlen (chars : chars_ptr) return Natural;
pragma Import (C, Strlen);
begin
if chars = Null_Address then
return "";
else
declare
subtype Result_Type is String (1 .. Strlen (chars));
Result : Result_Type;
for Result'Address use chars;
begin
return Result;
end;
end if;
end Value;
-----------------
-- Write_Usage --
-----------------
procedure Write_Usage is
begin
Write_Str ("Usage: ");
Write_Str (Base_Name (Command_Name));
Write_Str (" switches mainprog.ali [non-Ada-objects] [linker-options]");
Write_Eol;
Write_Eol;
Write_Line (" mainprog.ali the ALI file of the main program");
Write_Eol;
Write_Line (" -A Binder generated source file is in Ada (default)");
Write_Line (" -C Binder generated source file is in C");
Write_Line (" -f force object file list to be generated");
Write_Line (" -g Compile binder source file with debug information");
Write_Line (" -n Do not compile the binder source file");
Write_Line (" -v verbose mode");
Write_Line (" -v -v very verbose mode");
Write_Eol;
Write_Line (" -o nam Use 'nam' as the name of the executable");
Write_Line (" -b target Compile the binder source to run on target");
Write_Line (" -Bdir Load compiler executables from dir");
Write_Line (" --GCC=comp Use comp as the compiler");
Write_Line (" --LINK=nam Use 'nam' for the linking rather than 'gcc'");
Write_Eol;
Write_Line (" [non-Ada-objects] list of non Ada object files");
Write_Line (" [linker-options] other options for the linker");
end Write_Usage;
-- Start of processing for Gnatlink
begin
if Argument_Count = 0 then
Write_Usage;
Exit_Program (E_Fatal);
end if;
if Hostparm.Java_VM then
Gcc := new String'("jgnat");
Ada_Bind_File := True;
Begin_Info := "-- BEGIN Object file/option list";
End_Info := "-- END Object file/option list ";
end if;
Process_Args;
-- We always compile with -c
Binder_Options_From_ALI.Increment_Last;
Binder_Options_From_ALI.Table (Binder_Options_From_ALI.Last) :=
new String'("-c");
-- If the main program is in Ada it is compiled with the following
-- switches:
-- -gnatA stops reading gnat.adc, since we don't know what
-- pagmas would work, and we do not need it anyway.
-- -gnatWb allows brackets coding for wide characters
-- -gnatiw allows wide characters in identifiers. This is needed
-- because bindgen uses brackets encoding for all upper
-- half and wide characters in identifier names.
if Ada_Bind_File then
Binder_Options_From_ALI.Increment_Last;
Binder_Options_From_ALI.Table (Binder_Options_From_ALI.Last) :=
new String'("-gnatA");
Binder_Options_From_ALI.Increment_Last;
Binder_Options_From_ALI.Table (Binder_Options_From_ALI.Last) :=
new String'("-gnatWb");
Binder_Options_From_ALI.Increment_Last;
Binder_Options_From_ALI.Table (Binder_Options_From_ALI.Last) :=
new String'("-gnatiw");
end if;
-- Locate all the necessary programs and verify required files are present
Gcc_Path := GNAT.OS_Lib.Locate_Exec_On_Path (Gcc.all);
if Gcc_Path = null then
Exit_With_Error ("Couldn't locate " & Gcc.all);
end if;
if Linker_Path = null then
Linker_Path := Gcc_Path;
end if;
if Ali_File_Name = null then
Exit_With_Error ("Required 'name'.ali not present.");
end if;
if not Is_Regular_File (Ali_File_Name.all) then
Exit_With_Error (Ali_File_Name.all & " not found.");
-- Read the ALI file of the main subprogram if the binder generated
-- file is in Ada, it need to be compiled and no --GCC= switch has
-- been specified. Fetch the back end switches from this ALI file and use
-- these switches to compile the binder generated file
elsif Ada_Bind_File
and then Compile_Bind_File
and then Standard_Gcc
then
-- Do some initializations
Initialize_ALI;
Namet.Initialize;
Name_Len := Ali_File_Name'Length;
Name_Buffer (1 .. Name_Len) := Ali_File_Name.all;
declare
use Types;
F : constant File_Name_Type := Name_Find;
T : Text_Buffer_Ptr;
A : ALI_Id;
begin
-- Osint.Add_Default_Search_Dirs;
-- Load the ALI file
T := Read_Library_Info (F, True);
-- Read it
A := Scan_ALI (F, T, False, False, False);
if A /= No_ALI_Id then
for
Index in Units.Table (ALIs.Table (A).First_Unit).First_Arg
.. Units.Table (ALIs.Table (A).First_Unit).Last_Arg
loop
-- Do not compile with the front end switches
if not Is_Front_End_Switch (Args.Table (Index).all) then
Binder_Options_From_ALI.Increment_Last;
Binder_Options_From_ALI.Table (Binder_Options_From_ALI.Last)
:= String_Access (Args.Table (Index));
end if;
end loop;
end if;
end;
end if;
if Verbose_Mode then
Write_Eol;
Write_Str ("GNATLINK ");
Write_Str (Gnat_Version_String);
Write_Str (" Copyright 1996-2002 Free Software Foundation, Inc.");
Write_Eol;
end if;
-- If there wasn't an output specified, then use the base name of
-- the .ali file name.
if Output_File_Name = null then
Output_File_Name :=
new String'(Base_Name (Ali_File_Name.all)
& Get_Debuggable_Suffix.all);
Linker_Options.Increment_Last;
Linker_Options.Table (Linker_Options.Last) :=
new String'("-o");
Linker_Options.Increment_Last;
Linker_Options.Table (Linker_Options.Last) :=
new String'(Output_File_Name.all);
end if;
-- Warn if main program is called "test", as that may be a built-in command
-- on Unix. On non-Unix systems executables have a suffix, so the warning
-- will not appear. However, do not warn in the case of a cross compiler.
-- Assume that if the executable name is not gnatlink, this is a cross
-- tool.
if Base_Name (Command_Name) = "gnatlink"
and then Output_File_Name.all = "test"
then
Error_Msg ("warning: executable name """ & Output_File_Name.all
& """ may conflict with shell command");
end if;
-- Perform consistency checks
-- Transform the .ali file name into the binder output file name.
Make_Binder_File_Names : declare
Fname : String := Base_Name (Ali_File_Name.all);
Fname_Len : Integer := Fname'Length;
function Get_Maximum_File_Name_Length return Integer;
pragma Import (C, Get_Maximum_File_Name_Length,
"__gnat_get_maximum_file_name_length");
Maximum_File_Name_Length : Integer := Get_Maximum_File_Name_Length;
Second_Char : Character;
-- Second character of name of files
begin
-- Set proper second character of file name
if not Ada_Bind_File then
Second_Char := '_';
elsif Hostparm.OpenVMS then
Second_Char := '$';
else
Second_Char := '~';
end if;
-- If the length of the binder file becomes too long due to
-- the addition of the "b?" prefix, then truncate it.
if Maximum_File_Name_Length > 0 then
while Fname_Len > Maximum_File_Name_Length - 2 loop
Fname_Len := Fname_Len - 1;
end loop;
end if;
if Ada_Bind_File then
Binder_Spec_Src_File :=
new String'('b'
& Second_Char
& Fname (Fname'First .. Fname'First + Fname_Len - 1)
& ".ads");
Binder_Body_Src_File :=
new String'('b'
& Second_Char
& Fname (Fname'First .. Fname'First + Fname_Len - 1)
& ".adb");
Binder_Ali_File :=
new String'('b'
& Second_Char
& Fname (Fname'First .. Fname'First + Fname_Len - 1)
& ".ali");
else
Binder_Body_Src_File :=
new String'('b'
& Second_Char
& Fname (Fname'First .. Fname'First + Fname_Len - 1)
& ".c");
end if;
Binder_Obj_File :=
new String'('b'
& Second_Char
& Fname (Fname'First .. Fname'First + Fname_Len - 1)
& Get_Object_Suffix.all);
if Fname_Len /= Fname'Length then
Binder_Options.Increment_Last;
Binder_Options.Table (Binder_Options.Last) := new String'("-o");
Binder_Options.Increment_Last;
Binder_Options.Table (Binder_Options.Last) := Binder_Obj_File;
end if;
end Make_Binder_File_Names;
Process_Binder_File (Binder_Body_Src_File.all & ASCII.NUL);
-- Compile the binder file. This is fast, so we always do it, unless
-- specifically told not to by the -n switch
if Compile_Bind_File then
Bind_Step : declare
Success : Boolean;
Args : Argument_List
(1 .. Binder_Options_From_ALI.Last + Binder_Options.Last + 1);
begin
for J in 1 .. Binder_Options_From_ALI.Last loop
Args (J) := Binder_Options_From_ALI.Table (J);
end loop;
for J in 1 .. Binder_Options.Last loop
Args (Binder_Options_From_ALI.Last + J) :=
Binder_Options.Table (J);
end loop;
Args (Args'Last) := Binder_Body_Src_File;
if Verbose_Mode then
Write_Str (Base_Name (Gcc_Path.all));
for J in Args'Range loop
Write_Str (" ");
Write_Str (Args (J).all);
end loop;
Write_Eol;
end if;
GNAT.OS_Lib.Spawn (Gcc_Path.all, Args, Success);
if not Success then
Exit_Program (E_Fatal);
end if;
end Bind_Step;
end if;
-- Now, actually link the program.
-- Skip this step for now on the JVM since the Java interpreter will do
-- the actual link at run time. We might consider packing all class files
-- in a .zip file during this step.
if not Hostparm.Java_VM then
Link_Step : declare
Num_Args : Natural :=
(Linker_Options.Last - Linker_Options.First + 1) +
(Gcc_Linker_Options.Last - Gcc_Linker_Options.First + 1) +
(Linker_Objects.Last - Linker_Objects.First + 1);
Stack_Op : Boolean := False;
IDENT_Op : Boolean := False;
begin
-- Remove duplicate stack size setting from the Linker_Options
-- table. The stack setting option "-Xlinker --stack=R,C" can be
-- found in one line when set by a pragma Linker_Options or in two
-- lines ("-Xlinker" then "--stack=R,C") when set on the command
-- line. We also check for the "-Wl,--stack=R" style option.
-- We must remove the second stack setting option instance
-- because the one on the command line will always be the first
-- one. And any subsequent stack setting option will overwrite the
-- previous one. This is done especially for GNAT/NT where we set
-- the stack size for tasking programs by a pragma in the NT
-- specific tasking package System.Task_Primitives.Oparations.
for J in Linker_Options.First .. Linker_Options.Last loop
if Linker_Options.Table (J).all = "-Xlinker"
and then J < Linker_Options.Last
and then Linker_Options.Table (J + 1)'Length > 8
and then Linker_Options.Table (J + 1) (1 .. 8) = "--stack="
then
if Stack_Op then
Linker_Options.Table (J .. Linker_Options.Last - 2) :=
Linker_Options.Table (J + 2 .. Linker_Options.Last);
Linker_Options.Decrement_Last;
Linker_Options.Decrement_Last;
Num_Args := Num_Args - 2;
else
Stack_Op := True;
end if;
end if;
-- Here we just check for a canonical form that matches the
-- pragma Linker_Options set in the NT runtime.
if (Linker_Options.Table (J)'Length > 17
and then Linker_Options.Table (J) (1 .. 17)
= "-Xlinker --stack=")
or else
(Linker_Options.Table (J)'Length > 12
and then Linker_Options.Table (J) (1 .. 12)
= "-Wl,--stack=")
then
if Stack_Op then
Linker_Options.Table (J .. Linker_Options.Last - 1) :=
Linker_Options.Table (J + 1 .. Linker_Options.Last);
Linker_Options.Decrement_Last;
Num_Args := Num_Args - 1;
else
Stack_Op := True;
end if;
end if;
-- Remove duplicate IDENTIFICATION directives (VMS)
if Linker_Options.Table (J)'Length > 27
and then Linker_Options.Table (J) (1 .. 27)
= "--for-linker=IDENTIFICATION="
then
if IDENT_Op then
Linker_Options.Table (J .. Linker_Options.Last - 1) :=
Linker_Options.Table (J + 1 .. Linker_Options.Last);
Linker_Options.Decrement_Last;
Num_Args := Num_Args - 1;
else
IDENT_Op := True;
end if;
end if;
end loop;
-- Prepare arguments for call to linker
Call_Linker : declare
Success : Boolean;
Args : Argument_List (1 .. Num_Args + 1);
Index : Integer := Args'First;
begin
Args (Index) := Binder_Obj_File;
-- Add the object files and any -largs libraries
for J in Linker_Objects.First .. Linker_Objects.Last loop
Index := Index + 1;
Args (Index) := Linker_Objects.Table (J);
end loop;
-- Add the linker options from the binder file
for J in Linker_Options.First .. Linker_Options.Last loop
Index := Index + 1;
Args (Index) := Linker_Options.Table (J);
end loop;
-- Finally add the libraries from the --GCC= switch
for J in Gcc_Linker_Options.First .. Gcc_Linker_Options.Last loop
Index := Index + 1;
Args (Index) := Gcc_Linker_Options.Table (J);
end loop;
if Verbose_Mode then
Write_Str (Linker_Path.all);
for J in Args'Range loop
Write_Str (" ");
Write_Str (Args (J).all);
end loop;
Write_Eol;
-- If we are on very verbose mode (-v -v) and a response file
-- is used we display its content.
if Very_Verbose_Mode and then Tname_FD /= Invalid_FD then
Write_Eol;
Write_Str ("Response file (" &
Tname (Tname'First .. Tname'Last - 1) &
") content : ");
Write_Eol;
for J in
Response_File_Objects.First ..
Response_File_Objects.Last
loop
Write_Str (Response_File_Objects.Table (J).all);
Write_Eol;
end loop;
Write_Eol;
end if;
end if;
GNAT.OS_Lib.Spawn (Linker_Path.all, Args, Success);
-- Delete the temporary file used in conjuction with linking if
-- one was created. See Process_Bind_File for details.
if Tname_FD /= Invalid_FD then
Delete (Tname);
end if;
if not Success then
Error_Msg ("cannot call " & Linker_Path.all);
Exit_Program (E_Fatal);
end if;
end Call_Linker;
end Link_Step;
end if;
-- Only keep the binder output file and it's associated object
-- file if compiling with the -g option. These files are only
-- useful if debugging.
if not Debug_Flag_Present then
if Binder_Ali_File /= null then
Delete (Binder_Ali_File.all & ASCII.NUL);
end if;
if Binder_Spec_Src_File /= null then
Delete (Binder_Spec_Src_File.all & ASCII.NUL);
end if;
Delete (Binder_Body_Src_File.all & ASCII.NUL);
if not Hostparm.Java_VM then
Delete (Binder_Obj_File.all & ASCII.NUL);
end if;
end if;
Exit_Program (E_Success);
exception
when X : others =>
Write_Line (Exception_Information (X));
Exit_With_Error ("INTERNAL ERROR. Please report.");
end Gnatlink;
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