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			980 lines
		
	
	
		
			32 KiB
		
	
	
	
		
			ObjectPascal
		
	
	
	
	
	
			
		
		
	
	
			980 lines
		
	
	
		
			32 KiB
		
	
	
	
		
			ObjectPascal
		
	
	
	
	
	
| {
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|     Copyright (c) 1998-2002 by Peter Vreman
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| 
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|     This unit implements support import,export,link routines
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|     for the (i386) Linux target
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| 
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|     This program is free software; you can redistribute it and/or modify
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|     it under the terms of the GNU General Public License as published by
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|     the Free Software Foundation; either version 2 of the License, or
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|     (at your option) any later version.
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| 
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|     This program is distributed in the hope that it will be useful,
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|     but WITHOUT ANY WARRANTY; without even the implied warranty of
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|     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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|     GNU General Public License for more details.
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| 
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|     You should have received a copy of the GNU General Public License
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|     along with this program; if not, write to the Free Software
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|     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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| 
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|  ****************************************************************************
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| }
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| unit t_linux;
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| 
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| {$i fpcdefs.inc}
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| 
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| interface
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| 
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|   uses
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|     symsym,symdef,ppu,
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|     import,export,link;
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| 
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|   type
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|     timportliblinux=class(timportlib)
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|       procedure generatelib;override;
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|     end;
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| 
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|     texportliblinux=class(texportlib)
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|       procedure preparelib(const s : string);override;
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|       procedure exportprocedure(hp : texported_item);override;
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|       procedure exportvar(hp : texported_item);override;
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|       procedure generatelib;override;
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|     end;
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| 
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|     tlinkerlinux=class(texternallinker)
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|     private
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|       libctype:(libc5,glibc2,glibc21,uclibc);
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|       cprtobj,
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|       gprtobj,
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|       prtobj  : string[80];
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|       reorder : boolean;
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|       linklibc: boolean;
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|       Function  WriteResponseFile(isdll:boolean) : Boolean;
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|     public
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|       constructor Create;override;
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|       procedure SetDefaultInfo;override;
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|       procedure InitSysInitUnitName;override;
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|       function  MakeExecutable:boolean;override;
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|       function  MakeSharedLibrary:boolean;override;
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|       function  postprocessexecutable(const fn : string;isdll:boolean):boolean;
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|       procedure LoadPredefinedLibraryOrder; override;
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|     end;
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| 
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| 
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| implementation
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| 
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|   uses
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|     SysUtils,
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|     cutils,cfileutl,cclasses,
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|     verbose,systems,globtype,globals,
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|     symconst,script,
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|     fmodule,
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|     aasmbase,aasmtai,aasmdata,aasmcpu,cpubase,
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|     cgbase,cgobj,cgutils,ogbase,ncgutil,
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|     comprsrc,
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|     i_linux
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|     ;
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| 
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| {*****************************************************************************
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|                                TIMPORTLIBLINUX
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| *****************************************************************************}
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| 
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|     procedure timportliblinux.generatelib;
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|       var
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|         i : longint;
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|         ImportLibrary : TImportLibrary;
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|       begin
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|         for i:=0 to current_module.ImportLibraryList.Count-1 do
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|           begin
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|             ImportLibrary:=TImportLibrary(current_module.ImportLibraryList[i]);
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|             current_module.linkothersharedlibs.add(ImportLibrary.Name,link_always);
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|           end;
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|       end;
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| 
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| 
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| {*****************************************************************************
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|                                TEXPORTLIBLINUX
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| *****************************************************************************}
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| 
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| procedure texportliblinux.preparelib(const s:string);
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| begin
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| end;
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| 
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| 
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| procedure texportliblinux.exportprocedure(hp : texported_item);
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| var
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|   hp2 : texported_item;
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| begin
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|   { first test the index value }
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|   if (hp.options and eo_index)<>0 then
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|    begin
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|      Message1(parser_e_no_export_with_index_for_target,'linux');
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|      exit;
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|    end;
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|   { now place in correct order }
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|   hp2:=texported_item(current_module._exports.first);
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|   while assigned(hp2) and
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|      (hp.name^>hp2.name^) do
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|     hp2:=texported_item(hp2.next);
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|   { insert hp there !! }
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|   if assigned(hp2) and (hp2.name^=hp.name^) then
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|     begin
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|       { this is not allowed !! }
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|       Message1(parser_e_export_name_double,hp.name^);
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|       exit;
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|     end;
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|   if hp2=texported_item(current_module._exports.first) then
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|     current_module._exports.concat(hp)
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|   else if assigned(hp2) then
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|     begin
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|        hp.next:=hp2;
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|        hp.previous:=hp2.previous;
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|        if assigned(hp2.previous) then
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|          hp2.previous.next:=hp;
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|        hp2.previous:=hp;
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|     end
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|   else
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|     current_module._exports.concat(hp);
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| end;
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| 
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| 
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| procedure texportliblinux.exportvar(hp : texported_item);
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| begin
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|   hp.is_var:=true;
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|   exportprocedure(hp);
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| end;
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| 
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| 
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| procedure texportliblinux.generatelib;
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| var
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|   hp2 : texported_item;
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|   pd  : tprocdef;
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| {$ifdef x86}
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|   sym : tasmsymbol;
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|   r : treference;
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| {$endif x86}
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| begin
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|   new_section(current_asmdata.asmlists[al_procedures],sec_code,'',0);
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|   hp2:=texported_item(current_module._exports.first);
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|   while assigned(hp2) do
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|    begin
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|      if (not hp2.is_var) and
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|         (hp2.sym.typ=procsym) then
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|       begin
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|         { the manglednames can already be the same when the procedure
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|           is declared with cdecl }
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|         pd:=tprocdef(tprocsym(hp2.sym).ProcdefList[0]);
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|         if not has_alias_name(pd,hp2.name^) then
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|          begin
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|            { place jump in al_procedures }
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|            current_asmdata.asmlists[al_procedures].concat(tai_align.create(target_info.alignment.procalign));
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|            current_asmdata.asmlists[al_procedures].concat(Tai_symbol.Createname_global(hp2.name^,AT_FUNCTION,0));
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|            if (cs_create_pic in current_settings.moduleswitches) and
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|              { other targets need to be checked how it works }
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|              (target_info.system in [system_x86_64_linux,system_i386_linux]) then
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|              begin
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| {$ifdef x86}
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|                sym:=current_asmdata.RefAsmSymbol(pd.mangledname);
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|                reference_reset_symbol(r,sym,0);
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|                if cs_create_pic in current_settings.moduleswitches then
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|                  r.refaddr:=addr_pic
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|                else
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|                  r.refaddr:=addr_full;
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|                current_asmdata.asmlists[al_procedures].concat(taicpu.op_ref(A_JMP,S_NO,r));
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| {$endif x86}
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|              end
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|            else
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|              cg.a_jmp_name(current_asmdata.asmlists[al_procedures],pd.mangledname);
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|            current_asmdata.asmlists[al_procedures].concat(Tai_symbol_end.Createname(hp2.name^));
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|          end;
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|       end
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|      else
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|       message1(parser_e_no_export_of_variables_for_target,'linux');
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|      hp2:=texported_item(hp2.next);
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|    end;
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| end;
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| 
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| 
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| {*****************************************************************************
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|                                   TLINKERLINUX
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| *****************************************************************************}
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| 
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| Constructor TLinkerLinux.Create;
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| begin
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|   Inherited Create;
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|   if not Dontlinkstdlibpath Then
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| {$ifdef x86_64}
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|    LibrarySearchPath.AddPath('/lib64;/usr/lib64;/usr/X11R6/lib64',true);
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| {$else}
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| {$ifdef powerpc64}
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|    LibrarySearchPath.AddPath('/lib64;/usr/lib64;/usr/X11R6/lib64',true);
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| {$else powerpc64}
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|    LibrarySearchPath.AddPath('/lib;/usr/lib;/usr/X11R6/lib',true);
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| {$endif powerpc64}
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| {$endif x86_64}
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| end;
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| 
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| 
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| procedure TLinkerLinux.SetDefaultInfo;
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| {
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|   This will also detect which libc version will be used
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| }
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| 
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| const
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| {$ifdef i386}   platform_select='-b elf32-i386 -m elf_i386';{$endif}
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| {$ifdef x86_64} platform_select='-b elf64-x86-64 -m elf_x86_64';{$endif}
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| {$ifdef powerpc}platform_select='-b elf32-powerpc -m elf32ppclinux';{$endif}
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| {$ifdef POWERPC64}  platform_select='-b elf64-powerpc -m elf64ppc';{$endif}
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| {$ifdef sparc}  platform_select='-b elf32-sparc -m elf32_sparc';{$endif}
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| {$ifdef arm}    platform_select='';{$endif} {unknown :( }
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| {$ifdef m68k}    platform_select='';{$endif} {unknown :( }
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| 
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| {$ifdef m68k}
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| var
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|   St : TSearchRec;
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| {$endif m68k}
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| begin
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|   with Info do
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|    begin
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|      ExeCmd[1]:='ld '+platform_select+' $OPT $DYNLINK $STATIC $GCSECTIONS $STRIP -L. -o $EXE $RES';
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|      DllCmd[1]:='ld '+platform_select+' $OPT $INIT $FINI $SONAME -shared -L. -o $EXE $RES -E';
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|      DllCmd[2]:='strip --strip-unneeded $EXE';
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| {$ifdef m68k}
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|      libctype:=glibc2;
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|      if FindFirst('/lib/ld*',faAnyFile+faSymLink,st)<>0 then
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|        begin
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|          repeat
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|             if copy(st.name,1,5)='ld-2.' then
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|              begin
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|                DynamicLinker:='/lib/'+St.name;
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|                if st.name[6]<>'0' then
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|                  libctype:=glibc21;
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|                break;
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|              end;
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|          until FindNext(St)<>0;
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|        end;
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|      FindClose(St);
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| {$endif m68k}
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| 
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| {$ifdef i386}
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|      {
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|        Search order:
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|          glibc 2.1+
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|          uclibc
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|          glibc 2.0
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|        If none is found (e.g. when cross compiling) glibc21 is assumed
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|      }
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|      if FileExists('/lib/ld-linux.so.2',false) then
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|        begin
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|          DynamicLinker:='/lib/ld-linux.so.2';
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|          libctype:=glibc21;
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|        end
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|      else if fileexists('/lib/ld-uClibc.so.0',false) then
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|        begin
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|          dynamiclinker:='/lib/ld-uClibc.so.0';
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|          libctype:=uclibc;
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|        end
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|      else if fileexists('/lib/ld-linux.so.1',false) then
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|        begin
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|          DynamicLinker:='/lib/ld-linux.so.1';
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|          libctype:=glibc2;
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|        end
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|      else
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|        begin
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|          { default is glibc 2.1+ compatible }
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|          DynamicLinker:='/lib/ld-linux.so.2';
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|          libctype:=glibc21;
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|        end;
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| {$endif i386}
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| 
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| {$ifdef x86_64}
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|      DynamicLinker:='/lib64/ld-linux-x86-64.so.2';
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|      libctype:=glibc2;
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| {$endif x86_64}
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| 
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| {$ifdef sparc}
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|      DynamicLinker:='/lib/ld-linux.so.2';
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|      libctype:=glibc2;
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| {$endif sparc}
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| 
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| {$ifdef powerpc}
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|      DynamicLinker:='/lib/ld.so.1';
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|      libctype:=glibc2;
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| {$endif powerpc}
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| 
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| {$ifdef powerpc64}
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|      DynamicLinker:='/lib64/ld64.so.1';
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|      libctype:=glibc2;
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| {$endif powerpc64}
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| 
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| {$ifdef arm}
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|      DynamicLinker:='/lib/ld-linux.so.2';
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|      libctype:=glibc2;
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| {$endif arm}
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|    end;
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| end;
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| 
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| 
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| procedure TLinkerLinux.LoadPredefinedLibraryOrder;
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| // put your linkorder/linkalias overrides here.
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| // Note: assumes only called when reordering/aliasing is used.
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| Begin
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|    if not (cs_link_no_default_lib_order in  current_settings.globalswitches) Then
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|         Begin
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|           LinkLibraryOrder.add('gcc','',15);
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|           LinkLibraryOrder.add('c','',100);
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|           LinkLibraryOrder.add('gmon','',120);
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|           LinkLibraryOrder.add('dl','',140);
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|           LinkLibraryOrder.add('pthread','',160);
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|          end;
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| End;
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| 
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| Procedure TLinkerLinux.InitSysInitUnitName;
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| var
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|   csysinitunit,
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|   gsysinitunit : string[20];
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|   hp           : tmodule;
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| begin
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|   hp:=tmodule(loaded_units.first);
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|   while assigned(hp) do
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|    begin
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|      linklibc := hp.linkothersharedlibs.find('c');
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|      if linklibc then break;
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|      hp:=tmodule(hp.next);
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|    end;
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|   reorder := linklibc and ReOrderEntries;
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|   if current_module.islibrary then
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|    begin
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|      sysinitunit:='dll';
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|      csysinitunit:='dll';
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|      gsysinitunit:='dll';
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|      prtobj:='dllprt0';
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|      cprtobj:='dllprt0';
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|      gprtobj:='dllprt0';
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|    end
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|   else
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|    begin
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|      prtobj:='prt0';
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|      sysinitunit:='prc';
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|      case libctype of
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|        glibc21:
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|          begin
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|            cprtobj:='cprt21';
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|            gprtobj:='gprt21';
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|            csysinitunit:='c21';
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|            gsysinitunit:='c21g';
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|          end;
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|        uclibc:
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|          begin
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|            cprtobj:='ucprt0';
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|            gprtobj:='ugprt0';
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|            csysinitunit:='uc';
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|            gsysinitunit:='ucg';
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|          end
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|        else
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|          cprtobj:='cprt0';
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|          gprtobj:='gprt0';
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|          csysinitunit:='c';
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|          gsysinitunit:='g';
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|      end;
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|    end;
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|   if cs_profile in current_settings.moduleswitches then
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|    begin
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|      prtobj:=gprtobj;
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|      sysinitunit:=gsysinitunit;
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|      linklibc:=true;
 | |
|    end
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|   else
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|    begin
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|      if linklibc then
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|       begin
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|        prtobj:=cprtobj;
 | |
|        sysinitunit:=csysinitunit;
 | |
|       end;
 | |
|    end;
 | |
|   sysinitunit:='si_'+sysinitunit;
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| end;
 | |
| 
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| Function TLinkerLinux.WriteResponseFile(isdll:boolean) : Boolean;
 | |
| Var
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|   linkres      : TLinkRes;
 | |
|   i            : longint;
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|   HPath        : TCmdStrListItem;
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|   s,s1,s2      : TCmdStr;
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|   found1,
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|   found2       : boolean;
 | |
| begin
 | |
|   result:=False;
 | |
| { set special options for some targets }
 | |
|   if cs_profile in current_settings.moduleswitches then
 | |
|    begin
 | |
|      if not(libctype in [glibc2,glibc21]) then
 | |
|        AddSharedLibrary('gmon');
 | |
|      AddSharedLibrary('c');
 | |
|    end;
 | |
| 
 | |
|   { Open link.res file }
 | |
|   LinkRes:=TLinkRes.Create(outputexedir+Info.ResName);
 | |
|   with linkres do
 | |
|     begin
 | |
|       { Write path to search libraries }
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|       HPath:=TCmdStrListItem(current_module.locallibrarysearchpath.First);
 | |
|       while assigned(HPath) do
 | |
|        begin
 | |
|          Add('SEARCH_DIR('+maybequoted(HPath.Str)+')');
 | |
|          HPath:=TCmdStrListItem(HPath.Next);
 | |
|        end;
 | |
|       HPath:=TCmdStrListItem(LibrarySearchPath.First);
 | |
|       while assigned(HPath) do
 | |
|        begin
 | |
|          Add('SEARCH_DIR('+maybequoted(HPath.Str)+')');
 | |
|          HPath:=TCmdStrListItem(HPath.Next);
 | |
|        end;
 | |
| 
 | |
|       StartSection('INPUT(');
 | |
|       { add objectfiles, start with prt0 always }
 | |
|       if not (target_info.system in system_internal_sysinit) and (prtobj<>'') then
 | |
|        AddFileName(maybequoted(FindObjectFile(prtobj,'',false)));
 | |
|       { try to add crti and crtbegin if linking to C }
 | |
|       if linklibc then
 | |
|        begin
 | |
|          { x86_64 requires this to use entry/exit code with pic,
 | |
|            see also issue #8210 regarding a discussion
 | |
|            no idea about the other non i386 CPUs (FK)
 | |
|          }
 | |
| {$ifdef x86_64}
 | |
|          if current_module.islibrary then
 | |
|            begin
 | |
|              if librarysearchpath.FindFile('crtbeginS.o',false,s) then
 | |
|                AddFileName(s);
 | |
|            end
 | |
|          else
 | |
| {$endif x86_64}
 | |
|            if librarysearchpath.FindFile('crtbegin.o',false,s) then
 | |
|              AddFileName(s);
 | |
|          if librarysearchpath.FindFile('crti.o',false,s) then
 | |
|            AddFileName(s);
 | |
|        end;
 | |
|       { main objectfiles }
 | |
|       while not ObjectFiles.Empty do
 | |
|        begin
 | |
|          s:=ObjectFiles.GetFirst;
 | |
|          if s<>'' then
 | |
|           AddFileName(maybequoted(s));
 | |
|        end;
 | |
|       EndSection(')');
 | |
| 
 | |
|       { Write staticlibraries }
 | |
|       if not StaticLibFiles.Empty then
 | |
|        begin
 | |
|          Add('GROUP(');
 | |
|          While not StaticLibFiles.Empty do
 | |
|           begin
 | |
|             S:=StaticLibFiles.GetFirst;
 | |
|             AddFileName(maybequoted(s))
 | |
|           end;
 | |
|          Add(')');
 | |
|        end;
 | |
| 
 | |
|       // we must reorder here because the result could empty sharedlibfiles
 | |
|       if reorder Then
 | |
|         ExpandAndApplyOrder(SharedLibFiles);
 | |
|       // after this point addition of shared libs not allowed.
 | |
| 
 | |
|       { Write sharedlibraries like -l<lib>, also add the needed dynamic linker
 | |
|         here to be sure that it gets linked this is needed for glibc2 systems (PFV) }
 | |
| 
 | |
|       if not SharedLibFiles.Empty then
 | |
|        begin
 | |
| 
 | |
|          Add('INPUT(');
 | |
|          While not SharedLibFiles.Empty do
 | |
|           begin
 | |
|             S:=SharedLibFiles.GetFirst;
 | |
|             if (s<>'c') or reorder then
 | |
|              begin
 | |
|                i:=Pos(target_info.sharedlibext,S);
 | |
|                if i>0 then
 | |
|                 Delete(S,i,255);
 | |
|                Add('-l'+s);
 | |
|              end
 | |
|             else
 | |
|              begin
 | |
|                linklibc:=true;
 | |
|              end;
 | |
|           end;
 | |
|          { be sure that libc is the last lib }
 | |
|          if linklibc and not reorder then
 | |
|           Add('-lc');
 | |
|          { when we have -static for the linker the we also need libgcc }
 | |
|          if (cs_link_staticflag in current_settings.globalswitches) then
 | |
|           Add('-lgcc');
 | |
|          Add(')');
 | |
|        end;
 | |
| 
 | |
|       { objects which must be at the end }
 | |
|       if linklibc and (libctype<>uclibc) then
 | |
|        begin
 | |
|          { x86_64 requires this to use entry/exit code with pic,
 | |
|            see also issue #8210 regarding a discussion
 | |
|            no idea about the other non i386 CPUs (FK)
 | |
|          }
 | |
| {$ifdef x86_64}
 | |
|          if current_module.islibrary then
 | |
|            found1:=librarysearchpath.FindFile('crtendS.o',false,s1)
 | |
|          else
 | |
| {$endif x86_64}
 | |
|            found1:=librarysearchpath.FindFile('crtend.o',false,s1);
 | |
|          found2:=librarysearchpath.FindFile('crtn.o',false,s2);
 | |
|          if found1 or found2 then
 | |
|           begin
 | |
|             Add('INPUT(');
 | |
|             if found1 then
 | |
|              AddFileName(s1);
 | |
|             if found2 then
 | |
|              AddFileName(s2);
 | |
|             Add(')');
 | |
|           end;
 | |
|        end;
 | |
| 
 | |
|       {Entry point.}
 | |
|       add('ENTRY(_start)');
 | |
| 
 | |
| {$ifdef x86_64}
 | |
| {$define LINKERSCRIPT_INCLUDED}
 | |
|       add('SECTIONS');
 | |
|       add('{');
 | |
|       {Read-only sections, merged into text segment:}
 | |
|       if current_module.islibrary  then
 | |
|         add('  . = 0 +  SIZEOF_HEADERS;')
 | |
|       else
 | |
|         add('  PROVIDE (__executable_start = 0x0400000); . = 0x0400000 +  SIZEOF_HEADERS;');
 | |
|       add('  . = 0 +  SIZEOF_HEADERS;');
 | |
|       add('  .interp         : { *(.interp) }');
 | |
|       add('  .hash           : { *(.hash) }');
 | |
|       add('  .dynsym         : { *(.dynsym) }');
 | |
|       add('  .dynstr         : { *(.dynstr) }');
 | |
|       add('  .gnu.version    : { *(.gnu.version) }');
 | |
|       add('  .gnu.version_d  : { *(.gnu.version_d) }');
 | |
|       add('  .gnu.version_r  : { *(.gnu.version_r) }');
 | |
|       add('  .rel.dyn        :');
 | |
|       add('    {');
 | |
|       add('      *(.rel.init)');
 | |
|       add('      *(.rel.text .rel.text.* .rel.gnu.linkonce.t.*)');
 | |
|       add('      *(.rel.fini)');
 | |
|       add('      *(.rel.rodata .rel.rodata.* .rel.gnu.linkonce.r.*)');
 | |
|       add('      *(.rel.data.rel.ro*)');
 | |
|       add('      *(.rel.data .rel.data.* .rel.gnu.linkonce.d.*)');
 | |
|       add('      *(.rel.tdata .rel.tdata.* .rel.gnu.linkonce.td.*)');
 | |
|       add('      *(.rel.tbss .rel.tbss.* .rel.gnu.linkonce.tb.*)');
 | |
|       add('      *(.rel.got)');
 | |
|       add('      *(.rel.bss .rel.bss.* .rel.gnu.linkonce.b.*)');
 | |
|       add('    }');
 | |
|       add('  .rela.dyn       :');
 | |
|       add('    {');
 | |
|       add('      *(.rela.init)');
 | |
|       add('      *(.rela.text .rela.text.* .rela.gnu.linkonce.t.*)');
 | |
|       add('      *(.rela.fini)');
 | |
|       add('      *(.rela.rodata .rela.rodata.* .rela.gnu.linkonce.r.*)');
 | |
|       add('      *(.rela.data .rela.data.* .rela.gnu.linkonce.d.*)');
 | |
|       add('      *(.rela.tdata .rela.tdata.* .rela.gnu.linkonce.td.*)');
 | |
|       add('      *(.rela.tbss .rela.tbss.* .rela.gnu.linkonce.tb.*)');
 | |
|       add('      *(.rela.got)');
 | |
|       add('      *(.rela.bss .rela.bss.* .rela.gnu.linkonce.b.*)');
 | |
|       add('    }');
 | |
|       add('  .rel.plt        : { *(.rel.plt) }');
 | |
|       add('  .rela.plt       : { *(.rela.plt) }');
 | |
|       add('  .init           :');
 | |
|       add('  {');
 | |
|       add('    KEEP (*(.init))');
 | |
|       add('  } =0x90909090');
 | |
|       add('  .plt            : { *(.plt) }');
 | |
|       add('  .text           :');
 | |
|       add('  {');
 | |
|       add('    *(.text .stub .text.* .gnu.linkonce.t.*)');
 | |
|       add('    KEEP (*(.text.*personality*))');
 | |
|       {.gnu.warning sections are handled specially by elf32.em.}
 | |
|       add('    *(.gnu.warning)');
 | |
|       add('  } =0x90909090');
 | |
|       add('  .fini           :');
 | |
|       add('  {');
 | |
|       add('    KEEP (*(.fini))');
 | |
|       add('  } =0x90909090');
 | |
|       add('  PROVIDE (_etext = .);');
 | |
|       add('  .rodata         :');
 | |
|       add('  {');
 | |
|       add('    *(.rodata .rodata.* .gnu.linkonce.r.*)');
 | |
|       add('  }');
 | |
|       {Adjust the address for the data segment.  We want to adjust up to
 | |
|        the same address within the page on the next page up.}
 | |
|       add('  . = ALIGN (0x1000) - ((0x1000 - .) & (0x1000 - 1));');
 | |
|       add('  .dynamic        : { *(.dynamic) }');
 | |
|       add('  .got            : { *(.got .toc) }');
 | |
|       add('  .got.plt        : { *(.got.plt .toc.plt) }');
 | |
|       add('  .data           :');
 | |
|       add('  {');
 | |
|       add('    *(.data .data.* .gnu.linkonce.d.*)');
 | |
|       add('    KEEP (*(.fpc .fpc.n_version .fpc.n_links))');
 | |
|       add('    KEEP (*(.gnu.linkonce.d.*personality*))');
 | |
|       add('  }');
 | |
|       add('  PROVIDE (_edata = .);');
 | |
|       add('  PROVIDE (edata = .);');
 | |
|     {$ifdef zsegment_threadvars}
 | |
|       add('  _z = .;');
 | |
|       add('  .threadvar 0 : AT (_z) { *(.threadvar .threadvar.* .gnu.linkonce.tv.*) }');
 | |
|       add('  PROVIDE (_threadvar_size = SIZEOF(.threadvar));');
 | |
|       add('  . = _z + SIZEOF (.threadvar);');
 | |
|     {$else}
 | |
|       add('  .threadvar : { *(.threadvar .threadvar.* .gnu.linkonce.tv.*) }');
 | |
|     {$endif}
 | |
|       add('  __bss_start = .;');
 | |
|       add('  .bss            :');
 | |
|       add('  {');
 | |
|       add('   *(.dynbss)');
 | |
|       add('   *(.bss .bss.* .gnu.linkonce.b.*)');
 | |
|       add('   *(COMMON)');
 | |
|       {Align here to ensure that the .bss section occupies space up to
 | |
|        _end.  Align after .bss to ensure correct alignment even if the
 | |
|        .bss section disappears because there are no input sections.}
 | |
|       add('   . = ALIGN(32 / 8);');
 | |
|       add('  }');
 | |
|       add('  . = ALIGN(32 / 8);');
 | |
|       add('  PROVIDE (_end = .);');
 | |
|       add('  PROVIDE (end = .);');
 | |
|       {Stabs debugging sections.}
 | |
|       add('  .stab          0 : { *(.stab) }');
 | |
|       add('  .stabstr       0 : { *(.stabstr) }');
 | |
|       add('  /* DWARF debug sections.');
 | |
|       add('     Symbols in the DWARF debugging sections are relative to the beginning');
 | |
|       add('     of the section so we begin them at 0.  */');
 | |
|       add('  /* DWARF 1 */');
 | |
|       add('  .debug          0 : { *(.debug) }');
 | |
|       add('  .line           0 : { *(.line) }');
 | |
|       add('  /* GNU DWARF 1 extensions */');
 | |
|       add('  .debug_srcinfo  0 : { *(.debug_srcinfo) }');
 | |
|       add('  .debug_sfnames  0 : { *(.debug_sfnames) }');
 | |
|       add('  /* DWARF 1.1 and DWARF 2 */');
 | |
|       add('  .debug_aranges  0 : { *(.debug_aranges) }');
 | |
|       add('  .debug_pubnames 0 : { *(.debug_pubnames) }');
 | |
|       add('  /* DWARF 2 */');
 | |
|       add('  .debug_info     0 : { *(.debug_info .gnu.linkonce.wi.*) }');
 | |
|       add('  .debug_abbrev   0 : { *(.debug_abbrev) }');
 | |
|       add('  .debug_line     0 : { *(.debug_line) }');
 | |
|       add('  .debug_frame    0 : { *(.debug_frame) }');
 | |
|       add('  .debug_str      0 : { *(.debug_str) }');
 | |
|       add('  .debug_loc      0 : { *(.debug_loc) }');
 | |
|       add('  .debug_macinfo  0 : { *(.debug_macinfo) }');
 | |
|       add('  /* SGI/MIPS DWARF 2 extensions */');
 | |
|       add('  .debug_weaknames 0 : { *(.debug_weaknames) }');
 | |
|       add('  .debug_funcnames 0 : { *(.debug_funcnames) }');
 | |
|       add('  .debug_typenames 0 : { *(.debug_typenames) }');
 | |
|       add('  .debug_varnames  0 : { *(.debug_varnames) }');
 | |
|       add('  /DISCARD/ : { *(.note.GNU-stack) }');
 | |
|       add('}');
 | |
| {$endif x86_64}
 | |
| 
 | |
| 
 | |
| {$ifndef LINKERSCRIPT_INCLUDED}
 | |
|       {Sections.}
 | |
|       add('SECTIONS');
 | |
|       add('{');
 | |
|       {Read-only sections, merged into text segment:}
 | |
|       add('  PROVIDE (__executable_start = 0x010000); . = 0x010000 +0x100;');
 | |
|       add('  .interp         : { *(.interp) }');
 | |
|       add('  .hash           : { *(.hash) }');
 | |
|       add('  .dynsym         : { *(.dynsym) }');
 | |
|       add('  .dynstr         : { *(.dynstr) }');
 | |
|       add('  .gnu.version    : { *(.gnu.version) }');
 | |
|       add('  .gnu.version_d  : { *(.gnu.version_d) }');
 | |
|       add('  .gnu.version_r  : { *(.gnu.version_r) }');
 | |
|       add('  .rel.dyn        :');
 | |
|       add('    {');
 | |
|       add('      *(.rel.init)');
 | |
|       add('      *(.rel.text .rel.text.* .rel.gnu.linkonce.t.*)');
 | |
|       add('      *(.rel.fini)');
 | |
|       add('      *(.rel.rodata .rel.rodata.* .rel.gnu.linkonce.r.*)');
 | |
|       add('      *(.rel.data.rel.ro*)');
 | |
|       add('      *(.rel.data .rel.data.* .rel.gnu.linkonce.d.*)');
 | |
|       add('      *(.rel.tdata .rel.tdata.* .rel.gnu.linkonce.td.*)');
 | |
|       add('      *(.rel.tbss .rel.tbss.* .rel.gnu.linkonce.tb.*)');
 | |
|       add('      *(.rel.got)');
 | |
|       add('      *(.rel.bss .rel.bss.* .rel.gnu.linkonce.b.*)');
 | |
|       add('    }');
 | |
|       add('  .rela.dyn       :');
 | |
|       add('    {');
 | |
|       add('      *(.rela.init)');
 | |
|       add('      *(.rela.text .rela.text.* .rela.gnu.linkonce.t.*)');
 | |
|       add('      *(.rela.fini)');
 | |
|       add('      *(.rela.rodata .rela.rodata.* .rela.gnu.linkonce.r.*)');
 | |
|       add('      *(.rela.data .rela.data.* .rela.gnu.linkonce.d.*)');
 | |
|       add('      *(.rela.tdata .rela.tdata.* .rela.gnu.linkonce.td.*)');
 | |
|       add('      *(.rela.tbss .rela.tbss.* .rela.gnu.linkonce.tb.*)');
 | |
|       add('      *(.rela.got)');
 | |
|       add('      *(.rela.bss .rela.bss.* .rela.gnu.linkonce.b.*)');
 | |
|       add('    }');
 | |
|       add('  .rel.plt        : { *(.rel.plt) }');
 | |
|       add('  .rela.plt       : { *(.rela.plt) }');
 | |
|       add('  .init           :');
 | |
|       add('  {');
 | |
|       add('    KEEP (*(.init))');
 | |
|       add('  } =0x90909090');
 | |
|       add('  .plt            : { *(.plt) }');
 | |
|       add('  .text           :');
 | |
|       add('  {');
 | |
|       add('    *(.text .stub .text.* .gnu.linkonce.t.*)');
 | |
|       add('    KEEP (*(.text.*personality*))');
 | |
|       {.gnu.warning sections are handled specially by elf32.em.}
 | |
|       add('    *(.gnu.warning)');
 | |
|       add('  } =0x90909090');
 | |
|       add('  .fini           :');
 | |
|       add('  {');
 | |
|       add('    KEEP (*(.fini))');
 | |
|       add('  } =0x90909090');
 | |
|       add('  PROVIDE (_etext = .);');
 | |
|       add('  .rodata         :');
 | |
|       add('  {');
 | |
|       add('    *(.rodata .rodata.* .gnu.linkonce.r.*)');
 | |
|       add('  }');
 | |
|       {Adjust the address for the data segment.  We want to adjust up to
 | |
|        the same address within the page on the next page up.}
 | |
|       add('  . = ALIGN (0x1000) - ((0x1000 - .) & (0x1000 - 1));');
 | |
|       add('  .dynamic        : { *(.dynamic) }');
 | |
|       add('  .got            : { *(.got) }');
 | |
|       add('  .got.plt        : { *(.got.plt) }');
 | |
|       add('  .data           :');
 | |
|       add('  {');
 | |
|       add('    *(.data .data.* .gnu.linkonce.d.*)');
 | |
|       add('    KEEP (*(.fpc .fpc.n_version .fpc.n_links))');
 | |
|       add('    KEEP (*(.gnu.linkonce.d.*personality*))');
 | |
|       add('  }');
 | |
|       add('  PROVIDE (_edata = .);');
 | |
|       add('  PROVIDE (edata = .);');
 | |
|     {$ifdef zsegment_threadvars}
 | |
|       add('  _z = .;');
 | |
|       add('  .threadvar 0 : AT (_z) { *(.threadvar .threadvar.* .gnu.linkonce.tv.*) }');
 | |
|       add('  PROVIDE (_threadvar_size = SIZEOF(.threadvar));');
 | |
|       add('  . = _z + SIZEOF (.threadvar);');
 | |
|     {$else}
 | |
|       add('  .threadvar : { *(.threadvar .threadvar.* .gnu.linkonce.tv.*) }');
 | |
|     {$endif}
 | |
|       add('  __bss_start = .;');
 | |
|       add('  .bss            :');
 | |
|       add('  {');
 | |
|       add('   *(.dynbss)');
 | |
|       add('   *(.bss .bss.* .gnu.linkonce.b.*)');
 | |
|       add('   *(COMMON)');
 | |
|       {Align here to ensure that the .bss section occupies space up to
 | |
|        _end.  Align after .bss to ensure correct alignment even if the
 | |
|        .bss section disappears because there are no input sections.}
 | |
|       add('   . = ALIGN(32 / 8);');
 | |
|       add('  }');
 | |
|       add('  . = ALIGN(32 / 8);');
 | |
|       add('  PROVIDE (_end = .);');
 | |
|       add('  PROVIDE (end = .);');
 | |
|       {Stabs debugging sections.}
 | |
|       add('  .stab          0 : { *(.stab) }');
 | |
|       add('  .stabstr       0 : { *(.stabstr) }');
 | |
|       add('}');
 | |
| {$endif LINKERSCRIPT_INCLUDED}
 | |
|       { Write and Close response }
 | |
|       writetodisk;
 | |
|       Free;
 | |
|     end;
 | |
| 
 | |
|   WriteResponseFile:=True;
 | |
| end;
 | |
| 
 | |
| 
 | |
| function TLinkerLinux.MakeExecutable:boolean;
 | |
| var
 | |
|   binstr,
 | |
|   cmdstr  : TCmdStr;
 | |
|   success : boolean;
 | |
|   DynLinkStr : string[60];
 | |
|   GCSectionsStr,
 | |
|   StaticStr,
 | |
|   StripStr   : string[40];
 | |
| begin
 | |
|   if not(cs_link_nolink in current_settings.globalswitches) then
 | |
|    Message1(exec_i_linking,current_module.exefilename^);
 | |
| 
 | |
| { Create some replacements }
 | |
|   StaticStr:='';
 | |
|   StripStr:='';
 | |
|   GCSectionsStr:='';
 | |
|   DynLinkStr:='';
 | |
|   if (cs_link_staticflag in current_settings.globalswitches) then
 | |
|    StaticStr:='-static';
 | |
|   if (cs_link_strip in current_settings.globalswitches) then
 | |
|    StripStr:='-s';
 | |
|   if (cs_link_map in current_settings.globalswitches) then
 | |
|    StripStr:='-Map '+maybequoted(ChangeFileExt(current_module.exefilename^,'.map'));
 | |
|   if use_smartlink_section then
 | |
|    GCSectionsStr:='--gc-sections';
 | |
|   If (cs_profile in current_settings.moduleswitches) or
 | |
|      ((Info.DynamicLinker<>'') and (not SharedLibFiles.Empty)) then
 | |
|    begin
 | |
|      DynLinkStr:='-dynamic-linker='+Info.DynamicLinker;
 | |
|      if cshared Then
 | |
|        DynLinkStr:='--shared ' + DynLinkStr;
 | |
|      if rlinkpath<>'' Then
 | |
|        DynLinkStr:='--rpath-link '+rlinkpath + ' '+ DynLinkStr;
 | |
|    End;
 | |
| 
 | |
| { Write used files and libraries }
 | |
|   WriteResponseFile(false);
 | |
| 
 | |
| { Call linker }
 | |
|   SplitBinCmd(Info.ExeCmd[1],binstr,cmdstr);
 | |
|   Replace(cmdstr,'$EXE',maybequoted(current_module.exefilename^));
 | |
|   Replace(cmdstr,'$OPT',Info.ExtraOptions);
 | |
|   Replace(cmdstr,'$RES',maybequoted(outputexedir+Info.ResName));
 | |
|   Replace(cmdstr,'$STATIC',StaticStr);
 | |
|   Replace(cmdstr,'$STRIP',StripStr);
 | |
|   Replace(cmdstr,'$GCSECTIONS',GCSectionsStr);
 | |
|   Replace(cmdstr,'$DYNLINK',DynLinkStr);
 | |
| 
 | |
|   { create dynamic symbol table? }
 | |
|   if HasExports then
 | |
|     cmdstr:=cmdstr+' -E';
 | |
| 
 | |
|   success:=DoExec(FindUtil(utilsprefix+BinStr),CmdStr,true,false);
 | |
| 
 | |
| { Remove ReponseFile }
 | |
|   if (success) and not(cs_link_nolink in current_settings.globalswitches) then
 | |
|    DeleteFile(outputexedir+Info.ResName);
 | |
| 
 | |
|   if (success) then
 | |
|     success:=PostProcessExecutable(current_module.exefilename^,false);
 | |
| 
 | |
| 
 | |
|   MakeExecutable:=success;   { otherwise a recursive call to link method }
 | |
| end;
 | |
| 
 | |
| 
 | |
| Function TLinkerLinux.MakeSharedLibrary:boolean;
 | |
| var
 | |
|   InitStr,
 | |
|   FiniStr,
 | |
|   SoNameStr : string[80];
 | |
|   binstr,
 | |
|   cmdstr  : TCmdStr;
 | |
|   success : boolean;
 | |
| begin
 | |
|   MakeSharedLibrary:=false;
 | |
|   if not(cs_link_nolink in current_settings.globalswitches) then
 | |
|    Message1(exec_i_linking,current_module.sharedlibfilename^);
 | |
| 
 | |
| { Write used files and libraries }
 | |
|   WriteResponseFile(true);
 | |
| 
 | |
|  { Create some replacements }
 | |
|   InitStr:='-init FPC_LIB_START';
 | |
|   FiniStr:='-fini FPC_LIB_EXIT';
 | |
|   SoNameStr:='-soname '+ExtractFileName(current_module.sharedlibfilename^);
 | |
| 
 | |
| { Call linker }
 | |
|   SplitBinCmd(Info.DllCmd[1],binstr,cmdstr);
 | |
|   Replace(cmdstr,'$EXE',maybequoted(current_module.sharedlibfilename^));
 | |
|   Replace(cmdstr,'$OPT',Info.ExtraOptions);
 | |
|   Replace(cmdstr,'$RES',maybequoted(outputexedir+Info.ResName));
 | |
|   Replace(cmdstr,'$INIT',InitStr);
 | |
|   Replace(cmdstr,'$FINI',FiniStr);
 | |
|   Replace(cmdstr,'$SONAME',SoNameStr);
 | |
|   success:=DoExec(FindUtil(utilsprefix+binstr),cmdstr,true,false);
 | |
| 
 | |
| { Strip the library ? }
 | |
|   if success and (cs_link_strip in current_settings.globalswitches) then
 | |
|    begin
 | |
|      { only remove non global symbols and debugging info for a library }
 | |
|      Info.DllCmd[2]:='strip --discard-all --strip-debug $EXE';
 | |
|      SplitBinCmd(Info.DllCmd[2],binstr,cmdstr);
 | |
|      Replace(cmdstr,'$EXE',maybequoted(current_module.sharedlibfilename^));
 | |
|      success:=DoExec(FindUtil(utilsprefix+binstr),cmdstr,true,false);
 | |
|    end;
 | |
| 
 | |
| { Remove ReponseFile }
 | |
|   if (success) and not(cs_link_nolink in current_settings.globalswitches) then
 | |
|    DeleteFile(outputexedir+Info.ResName);
 | |
| 
 | |
|   MakeSharedLibrary:=success;   { otherwise a recursive call to link method }
 | |
| end;
 | |
| 
 | |
| 
 | |
| function tlinkerLinux.postprocessexecutable(const fn : string;isdll:boolean):boolean;
 | |
| var
 | |
|   cmdstr: string;
 | |
| begin
 | |
|   result:=True;
 | |
|   if HasResources and
 | |
|      (target_res.id=res_elf) then
 | |
|     begin
 | |
|       cmdstr:=' -f -i '+maybequoted(fn);
 | |
|       result:=DoExec(FindUtil(utilsprefix+'fpcres'),cmdstr,false,false);
 | |
|     end;
 | |
| end;
 | |
| 
 | |
| 
 | |
| {*****************************************************************************
 | |
|                                   Initialize
 | |
| *****************************************************************************}
 | |
| 
 | |
| initialization
 | |
| {$ifdef i386}
 | |
|   RegisterExternalLinker(system_i386_linux_info,TLinkerLinux);
 | |
|   RegisterImport(system_i386_linux,timportliblinux);
 | |
|   RegisterExport(system_i386_linux,texportliblinux);
 | |
|   RegisterTarget(system_i386_linux_info);
 | |
|   RegisterRes(res_elf32_info,TWinLikeResourceFile);
 | |
| 
 | |
|   RegisterExternalLinker(system_x86_6432_linux_info,TLinkerLinux);
 | |
|   RegisterImport(system_x86_6432_linux,timportliblinux);
 | |
|   RegisterExport(system_x86_6432_linux,texportliblinux);
 | |
|   RegisterTarget(system_x86_6432_linux_info);
 | |
| {$endif i386}
 | |
| {$ifdef m68k}
 | |
|   RegisterExternalLinker(system_m68k_linux_info,TLinkerLinux);
 | |
|   RegisterImport(system_m68k_linux,timportliblinux);
 | |
|   RegisterExport(system_m68k_linux,texportliblinux);
 | |
|   RegisterTarget(system_m68k_linux_info);
 | |
| {$endif m68k}
 | |
| {$ifdef powerpc}
 | |
|   RegisterExternalLinker(system_powerpc_linux_info,TLinkerLinux);
 | |
|   RegisterImport(system_powerpc_linux,timportliblinux);
 | |
|   RegisterExport(system_powerpc_linux,texportliblinux);
 | |
|   RegisterTarget(system_powerpc_linux_info);
 | |
| {$endif powerpc}
 | |
| {$ifdef powerpc64}
 | |
|   RegisterExternalLinker(system_powerpc64_linux_info,TLinkerLinux);
 | |
|   RegisterImport(system_powerpc64_linux,timportliblinux);
 | |
|   RegisterExport(system_powerpc64_linux,texportliblinux);
 | |
|   RegisterTarget(system_powerpc64_linux_info);
 | |
| {$endif powerpc64}
 | |
| {$ifdef alpha}
 | |
|   RegisterExternalLinker(system_alpha_linux_info,TLinkerLinux);
 | |
|   RegisterImport(system_alpha_linux,timportliblinux);
 | |
|   RegisterExport(system_alpha_linux,texportliblinux);
 | |
|   RegisterTarget(system_alpha_linux_info);
 | |
| {$endif alpha}
 | |
| {$ifdef x86_64}
 | |
|   RegisterExternalLinker(system_x86_64_linux_info,TLinkerLinux);
 | |
|   RegisterImport(system_x86_64_linux,timportliblinux);
 | |
|   RegisterExport(system_x86_64_linux,texportliblinux);
 | |
|   RegisterTarget(system_x86_64_linux_info);
 | |
|   RegisterRes(res_elf64_info,TWinLikeResourceFile);
 | |
| {$endif x86_64}
 | |
| {$ifdef SPARC}
 | |
|   RegisterExternalLinker(system_sparc_linux_info,TLinkerLinux);
 | |
|   RegisterImport(system_SPARC_linux,timportliblinux);
 | |
|   RegisterExport(system_SPARC_linux,texportliblinux);
 | |
|   RegisterTarget(system_SPARC_linux_info);
 | |
| {$endif SPARC}
 | |
| {$ifdef ARM}
 | |
|   RegisterExternalLinker(system_arm_linux_info,TLinkerLinux);
 | |
|   RegisterImport(system_arm_linux,timportliblinux);
 | |
|   RegisterExport(system_arm_linux,texportliblinux);
 | |
|   RegisterTarget(system_arm_linux_info);
 | |
| {$endif ARM}
 | |
| end.
 | 
