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@@ -0,0 +1,512 @@
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+{
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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) Go32v2 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_msdos;
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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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+
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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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+ globtype,globals,systems,verbose,script,
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+ fmodule,i_msdos,
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+ link{,ogcoff},aasmbase;
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+
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+ type
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+{ TInternalLinkerGo32v2=class(TInternallinker)
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+ constructor create;override;
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+ procedure DefaultLinkScript;override;
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+ end;}
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+
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+ TExternalLinkerGo32v2=class(texternallinker)
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+ private
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+ Function WriteResponseFile(isdll:boolean) : Boolean;
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+ Function WriteScript(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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+ function MakeExecutable:boolean;override;
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+ end;
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+
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+
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+{****************************************************************************
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+ TCoffLinker
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+****************************************************************************}
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+
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+(* constructor TInternalLinkerGo32v2.Create;
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+ begin
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+ inherited Create;
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+ CExeoutput:=TDJCoffexeoutput;
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+ CObjInput:=TDJCoffObjInput;
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+ end;
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+
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+
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+ procedure TInternalLinkerGo32v2.DefaultLinkScript;
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+ var
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+ s: TCmdStr;
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+ linklibc: Boolean;
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+ i: longint;
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+
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+ procedure AddLib(const name: TCmdStr);
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+ var
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+ s2: TCmdStr;
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+ begin
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+ if FindLibraryFile(name,target_info.staticClibprefix,target_info.staticClibext,s2) then
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+ LinkScript.Concat('READSTATICLIBRARY '+MaybeQuoted(s2))
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+ else
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+ Comment(V_Error,'Import library not found for '+name);
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+ end;
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+
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+ begin
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+ with LinkScript do
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+ begin
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+ Concat('READOBJECT '+GetShortName(FindObjectFile('prt0','',false)));
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+ while not ObjectFiles.Empty do
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+ begin
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+ s:=ObjectFiles.GetFirst;
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+ if s<>'' then
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+ Concat('READOBJECT '+MaybeQuoted(s));
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+ end;
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+ while not StaticLibFiles.Empty do
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+ begin
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+ s:=StaticLibFiles.GetFirst;
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+ if s<>'' then
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+ Concat('READSTATICLIBRARY '+MaybeQuoted(s));
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+ end;
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+ linklibc:=False;
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+ while not SharedLibFiles.Empty do
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+ begin
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+ S:=SharedLibFiles.GetFirst;
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+ if S<>'c' then
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+ begin
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+ i:=Pos(target_info.sharedlibext,S);
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+ if i>0 then
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+ Delete(S,i,255);
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+ AddLib(s);
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+ end
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+ else
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+ linklibc:=true;
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+ end;
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+ { be sure that to add libc and libgcc at the end }
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+ if linklibc then
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+ begin
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+ AddLib('c');
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+ AddLib('gcc');
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+ end;
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+
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+ Concat('ENTRYNAME start');
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+ Concat('HEADER');
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+ Concat('EXESECTION .text');
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+ Concat(' OBJSECTION .text*');
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+ Concat(' SYMBOL etext');
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+ Concat(' PROVIDE _etext');
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+ Concat('ENDEXESECTION');
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+ Concat('EXESECTION .data');
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+ Concat(' SYMBOL djgpp_first_ctor');
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+ Concat(' OBJSECTION .ctors.*');
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+ Concat(' OBJSECTION .ctor');
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+ Concat(' OBJSECTION .ctors');
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+ Concat(' SYMBOL djgpp_last_ctor');
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+ Concat(' SYMBOL djgpp_first_dtor');
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+ Concat(' OBJSECTION .dtors.*');
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+ Concat(' OBJSECTION .dtor');
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+ Concat(' OBJSECTION .dtors');
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+ Concat(' SYMBOL djgpp_last_dtor');
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+ Concat(' SYMBOL __environ');
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+ Concat(' PROVIDE _environ');
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+ Concat(' LONG 0');
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+ Concat(' OBJSECTION .data*');
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+ Concat(' OBJSECTION .fpc*');
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+ Concat(' OBJSECTION .gcc_exc*');
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+ Concat(' SYMBOL ___EH_FRAME_BEGIN__');
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+ Concat(' OBJSECTION .eh_fram*');
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+ Concat(' SYMBOL ___EH_FRAME_END__');
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+ Concat(' LONG 0');
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+ Concat(' SYMBOL edata');
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+ Concat(' SYMBOL _edata');
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+ Concat('ENDEXESECTION');
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+ Concat('EXESECTION .bss');
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+ //ScriptRes.Add(' _object.2 = . ;');
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+ //ScriptRes.Add(' . += 32 ;');
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+ Concat(' OBJSECTION .bss*');
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+ Concat(' SYMBOL end');
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+ Concat(' SYMBOL _end');
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+ Concat('ENDEXESECTION');
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+ { Stabs debugging sections }
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+ Concat('EXESECTION .stab');
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+ Concat(' OBJSECTION .stab');
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+ Concat('ENDEXESECTION');
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+ Concat('EXESECTION .stabstr');
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+ Concat(' OBJSECTION .stabstr');
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+ Concat('ENDEXESECTION');
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+ { DWARF 2 }
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+ ScriptAddGenericSections('.debug_aranges,.debug_pubnames,.debug_info,.debug_abbrev,'+
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+ '.debug_line,.debug_frame,.debug_str,.debug_loc,.debug_macinfo');
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+ Concat('STABS');
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+ Concat('SYMBOLS');
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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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+ TExternalLinkerGo32v2
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+****************************************************************************}
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+
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+Constructor TExternalLinkerGo32v2.Create;
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+begin
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+ Inherited Create;
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+ { allow duplicated libs (PM) }
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+ SharedLibFiles.doubles:=true;
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+ StaticLibFiles.doubles:=true;
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+end;
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+
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+
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+procedure TExternalLinkerGo32v2.SetDefaultInfo;
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+begin
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+ with Info do
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+ begin
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+ ExeCmd[1]:='ld $RES';
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+ end;
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+end;
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+
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+
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+Function TExternalLinkerGo32v2.WriteResponseFile(isdll:boolean) : Boolean;
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+Var
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+ linkres : TLinkRes;
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+ i : longint;
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+ s : string;
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+ linklibc : boolean;
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+begin
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+ WriteResponseFile:=False;
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+
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+ { Open link.res file }
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+ LinkRes:=TLinkRes.Create(outputexedir+Info.ResName,true);
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+
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+ { Add all options to link.res instead of passing them via command line:
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+ DOS command line is limited to 126 characters! }
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+ LinkRes.Add('--script='+maybequoted(outputexedir+Info.ScriptName));
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+ if (cs_link_map in current_settings.globalswitches) then
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+ LinkRes.Add('-Map '+maybequoted(ChangeFileExt(current_module.exefilename,'.map')));
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+ if create_smartlink_sections then
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+ LinkRes.Add('--gc-sections');
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+ if info.ExtraOptions<>'' then
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+ LinkRes.Add(Info.ExtraOptions);
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+(* Potential issues with older ld version??? *)
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+ if (cs_link_strip in current_settings.globalswitches) then
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+ LinkRes.Add('-s');
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+ LinkRes.Add('-o '+maybequoted(current_module.exefilename));
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+
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+ { Write staticlibraries }
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+ if not StaticLibFiles.Empty then
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+ begin
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+ LinkRes.Add('-(');
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+ While not StaticLibFiles.Empty do
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+ begin
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+ S:=StaticLibFiles.GetFirst;
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+ LinkRes.AddFileName(GetShortName(s))
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+ end;
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+ LinkRes.Add('-)');
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+ end;
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+
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+ { Write sharedlibraries like -l<lib>, also add the needed dynamic linker
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+ here to be sure that it gets linked this is needed for glibc2 systems (PFV) }
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+ linklibc:=false;
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+ While not SharedLibFiles.Empty do
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+ begin
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+ S:=SharedLibFiles.GetFirst;
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+ if s<>'c' then
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+ begin
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+ i:=Pos(target_info.sharedlibext,S);
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+ if i>0 then
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+ Delete(S,i,255);
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+ LinkRes.Add('-l'+s);
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+ end
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+ else
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+ linklibc:=true;
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+ end;
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+ { be sure that libc&libgcc is the last lib }
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+ if linklibc then
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+ begin
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+ LinkRes.Add('-lc');
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+ LinkRes.Add('-lgcc');
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+ end;
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+
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+{ Write and Close response }
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+ linkres.writetodisk;
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+ LinkRes.Free;
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+
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+ WriteResponseFile:=True;
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+end;
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+
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+
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+Function TExternalLinkerGo32v2.WriteScript(isdll:boolean) : Boolean;
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+Var
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+ scriptres : TLinkRes;
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+ HPath : TCmdStrListItem;
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+ s : string;
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+begin
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+ WriteScript:=False;
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+
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+ { Open link.res file }
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+ ScriptRes:=TLinkRes.Create(outputexedir+Info.ScriptName,true);
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+ ScriptRes.Add('OUTPUT_FORMAT("coff-go32-exe")');
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+ ScriptRes.Add('ENTRY(start)');
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+
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+ ScriptRes.Add('SECTIONS');
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+ ScriptRes.Add('{');
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+ ScriptRes.Add(' .text 0x1000+SIZEOF_HEADERS : {');
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+ ScriptRes.Add(' . = ALIGN(16);');
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+ { add objectfiles, start with prt0 always }
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+ ScriptRes.Add(' '+GetShortName(FindObjectFile('prt0','',false))+'(.text)');
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+ while not ObjectFiles.Empty do
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+ begin
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+ s:=ObjectFiles.GetFirst;
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+ if s<>'' then
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+ begin
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+ ScriptRes.Add(' . = ALIGN(16);');
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+ ScriptRes.Add(' '+GetShortName(s)+'(.text)');
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+ end;
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+ end;
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+ ScriptRes.Add(' *(.text)');
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+ ScriptRes.Add(' *(.text.*)');
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+ ScriptRes.Add(' etext = . ;');
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+ ScriptRes.Add(' PROVIDE(_etext = .);');
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+ ScriptRes.Add(' . = ALIGN(0x200);');
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+ ScriptRes.Add(' }');
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+ ScriptRes.Add(' .data ALIGN(0x200) : {');
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+ ScriptRes.Add(' djgpp_first_ctor = . ;');
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+ ScriptRes.Add(' *(SORT(.ctors.*))');
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+ ScriptRes.Add(' *(.ctor)');
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+ ScriptRes.Add(' *(.ctors)');
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+ ScriptRes.Add(' djgpp_last_ctor = . ;');
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+ ScriptRes.Add(' djgpp_first_dtor = . ;');
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+ ScriptRes.Add(' *(SORT(.dtors.*))');
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+ ScriptRes.Add(' *(.dtor)');
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+ ScriptRes.Add(' *(.dtors)');
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+ ScriptRes.Add(' djgpp_last_dtor = . ;');
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+ ScriptRes.Add(' __environ = . ;');
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+ ScriptRes.Add(' PROVIDE(_environ = .);');
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+ ScriptRes.Add(' LONG(0)');
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+ ScriptRes.Add(' *(.data)');
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+ ScriptRes.Add(' *(.data.*)');
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+ ScriptRes.Add(' *(.fpc*)');
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+ ScriptRes.Add(' *(.gcc_exc)');
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+ ScriptRes.Add(' ___EH_FRAME_BEGIN__ = . ;');
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+ ScriptRes.Add(' *(.eh_fram*)');
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+ ScriptRes.Add(' ___EH_FRAME_END__ = . ;');
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+ ScriptRes.Add(' LONG(0)');
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+ ScriptRes.Add(' edata = . ; _edata = .;');
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+ ScriptRes.Add(' . = ALIGN(0x200);');
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+ ScriptRes.Add(' }');
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+ ScriptRes.Add(' .bss SIZEOF(.data) + ADDR(.data) :');
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+ ScriptRes.Add(' {');
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+ ScriptRes.Add(' _object.2 = . ;');
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+ ScriptRes.Add(' . += 32 ;');
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+ ScriptRes.Add(' *(.bss)');
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+ ScriptRes.Add(' *(.bss.*)');
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+ ScriptRes.Add(' *(COMMON)');
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+ ScriptRes.Add(' end = . ; _end = .;');
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+ ScriptRes.Add(' . = ALIGN(0x200);');
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+ ScriptRes.Add(' }');
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+ ScriptRes.Add(' /* Stabs debugging sections. */');
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+ ScriptRes.Add(' .stab 0 : { *(.stab) }');
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+ ScriptRes.Add(' .stabstr 0 : { *(.stabstr) }');
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+ ScriptRes.Add(' /* DWARF 2 */');
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+ ScriptRes.Add(' .debug_aranges 0 : { *(.debug_aranges) }');
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+ ScriptRes.Add(' .debug_pubnames 0 : { *(.debug_pubnames) }');
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+ ScriptRes.Add(' .debug_info 0 : { *(.debug_info) *(.gnu.linkonce.wi.*) }');
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+ ScriptRes.Add(' .debug_abbrev 0 : { *(.debug_abbrev) }');
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+ ScriptRes.Add(' .debug_line 0 : { *(.debug_line) }');
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+ ScriptRes.Add(' .debug_frame 0 : { *(.debug_frame) }');
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+ ScriptRes.Add(' .debug_str 0 : { *(.debug_str) }');
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+ ScriptRes.Add(' .debug_loc 0 : { *(.debug_loc) }');
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+ ScriptRes.Add(' .debug_macinfo 0 : { *(.debug_macinfo) }');
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+ ScriptRes.Add(' }');
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+
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+ { Write path to search libraries }
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+ HPath:=TCmdStrListItem(current_module.locallibrarysearchpath.First);
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+ while assigned(HPath) do
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+ begin
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+ ScriptRes.Add('SEARCH_DIR("'+GetShortName(HPath.Str)+'")');
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+ HPath:=TCmdStrListItem(HPath.Next);
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+ end;
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+ HPath:=TCmdStrListItem(LibrarySearchPath.First);
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+ while assigned(HPath) do
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+ begin
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+ ScriptRes.Add('SEARCH_DIR("'+GetShortName(HPath.Str)+'")');
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+ HPath:=TCmdStrListItem(HPath.Next);
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+ end;
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+
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+{ Write and Close response }
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+ ScriptRes.WriteToDisk;
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+ ScriptRes.Free;
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+
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+ WriteScript:=True;
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+end;
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+
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+
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+
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+function TExternalLinkerGo32v2.MakeExecutable:boolean;
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+var
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+ binstr,
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+ cmdstr : TCmdStr;
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+ success : boolean;
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+begin
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+ if not(cs_link_nolink in current_settings.globalswitches) then
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+ Message1(exec_i_linking,current_module.exefilename);
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+
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+ { Write used files and libraries and our own ld script }
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+ WriteScript(false);
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+ WriteResponsefile(false);
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+
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+{ Call linker }
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+ SplitBinCmd(Info.ExeCmd[1],binstr,cmdstr);
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+ Replace(cmdstr,'$RES','@'+maybequoted(outputexedir+Info.ResName));
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+ success:=DoExec(FindUtil(utilsprefix+BinStr),cmdstr,true,false);
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+
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+{ Remove ReponseFile }
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+ if (success) and not(cs_link_nolink in current_settings.globalswitches) then
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+ begin
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+ DeleteFile(outputexedir+Info.ResName);
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+ DeleteFile(outputexedir+Info.ScriptName);
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+ end;
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+
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+ MakeExecutable:=success; { otherwise a recursive call to link method }
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+end;
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+
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+
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+{$ifdef notnecessary}
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+procedure TExternalLinkerGo32v2.postprocessexecutable(const n : string);
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+type
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+ tcoffheader=packed record
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+ mach : word;
|
|
|
+ nsects : word;
|
|
|
+ time : longint;
|
|
|
+ sympos : longint;
|
|
|
+ syms : longint;
|
|
|
+ opthdr : word;
|
|
|
+ flag : word;
|
|
|
+ end;
|
|
|
+ tcoffsechdr=packed record
|
|
|
+ name : array[0..7] of char;
|
|
|
+ vsize : longint;
|
|
|
+ rvaofs : longint;
|
|
|
+ datalen : longint;
|
|
|
+ datapos : longint;
|
|
|
+ relocpos : longint;
|
|
|
+ lineno1 : longint;
|
|
|
+ nrelocs : word;
|
|
|
+ lineno2 : word;
|
|
|
+ flags : longint;
|
|
|
+ end;
|
|
|
+ psecfill=^TSecfill;
|
|
|
+ TSecfill=record
|
|
|
+ fillpos,
|
|
|
+ fillsize : longint;
|
|
|
+ next : psecfill;
|
|
|
+ end;
|
|
|
+var
|
|
|
+ f : file;
|
|
|
+ coffheader : tcoffheader;
|
|
|
+ firstsecpos,
|
|
|
+ maxfillsize,
|
|
|
+ l : longint;
|
|
|
+ coffsec : tcoffsechdr;
|
|
|
+ secroot,hsecroot : psecfill;
|
|
|
+ zerobuf : pointer;
|
|
|
+begin
|
|
|
+ { when -s is used quit, because there is no .exe }
|
|
|
+ if cs_link_nolink in current_settings.globalswitches then
|
|
|
+ exit;
|
|
|
+ { open file }
|
|
|
+ assign(f,n);
|
|
|
+ {$push}{$I-}
|
|
|
+ reset(f,1);
|
|
|
+ if ioresult<>0 then
|
|
|
+ Message1(execinfo_f_cant_open_executable,n);
|
|
|
+ { read headers }
|
|
|
+ seek(f,2048);
|
|
|
+ blockread(f,coffheader,sizeof(tcoffheader));
|
|
|
+ { read section info }
|
|
|
+ maxfillsize:=0;
|
|
|
+ firstsecpos:=0;
|
|
|
+ secroot:=nil;
|
|
|
+ for l:=1to coffheader.nSects do
|
|
|
+ begin
|
|
|
+ blockread(f,coffsec,sizeof(tcoffsechdr));
|
|
|
+ if coffsec.datapos>0 then
|
|
|
+ begin
|
|
|
+ if secroot=nil then
|
|
|
+ firstsecpos:=coffsec.datapos;
|
|
|
+ new(hsecroot);
|
|
|
+ hsecroot^.fillpos:=coffsec.datapos+coffsec.vsize;
|
|
|
+ hsecroot^.fillsize:=coffsec.datalen-coffsec.vsize;
|
|
|
+ hsecroot^.next:=secroot;
|
|
|
+ secroot:=hsecroot;
|
|
|
+ if secroot^.fillsize>maxfillsize then
|
|
|
+ maxfillsize:=secroot^.fillsize;
|
|
|
+ end;
|
|
|
+ end;
|
|
|
+ if firstsecpos>0 then
|
|
|
+ begin
|
|
|
+ l:=firstsecpos-filepos(f);
|
|
|
+ if l>maxfillsize then
|
|
|
+ maxfillsize:=l;
|
|
|
+ end
|
|
|
+ else
|
|
|
+ l:=0;
|
|
|
+ { get zero buffer }
|
|
|
+ getmem(zerobuf,maxfillsize);
|
|
|
+ fillchar(zerobuf^,maxfillsize,0);
|
|
|
+ { zero from sectioninfo until first section }
|
|
|
+ blockwrite(f,zerobuf^,l);
|
|
|
+ { zero section alignments }
|
|
|
+ while assigned(secroot) do
|
|
|
+ begin
|
|
|
+ seek(f,secroot^.fillpos);
|
|
|
+ blockwrite(f,zerobuf^,secroot^.fillsize);
|
|
|
+ hsecroot:=secroot;
|
|
|
+ secroot:=secroot^.next;
|
|
|
+ dispose(hsecroot);
|
|
|
+ end;
|
|
|
+ freemem(zerobuf,maxfillsize);
|
|
|
+ close(f);
|
|
|
+ {$pop}
|
|
|
+ i:=ioresult;
|
|
|
+ postprocessexecutable:=true;
|
|
|
+end;
|
|
|
+{$endif}
|
|
|
+
|
|
|
+
|
|
|
+{*****************************************************************************
|
|
|
+ Initialize
|
|
|
+*****************************************************************************}
|
|
|
+
|
|
|
+initialization
|
|
|
+ RegisterExternalLinker(system_i8086_msdos_info,TExternalLinkerGo32v2);
|
|
|
+ RegisterTarget(system_i8086_msdos_info);
|
|
|
+end.
|
nickysn