freepascal.compiler/compiler/options.pas

{
    $Id$
    Copyright (c) 1998-2002 by Florian Klaempfl and Peter Vreman

    Reads command line options and config files

    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 2 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program; if not, write to the Free Software
    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.

 ****************************************************************************
}
unit options;

{$i fpcdefs.inc}

interface

uses
  globtype,globals,verbose,systems,cpuinfo;

type
  TOption=class
    FirstPass,
    NoPressEnter,
    DoWriteLogo : boolean;
    FileLevel : longint;
    QuickInfo : string;
    ParaIncludePath,
    ParaUnitPath,
    ParaObjectPath,
    ParaLibraryPath : TSearchPathList;
    ParaAlignment   : TAlignmentInfo;
    Constructor Create;
    Destructor Destroy;override;
    procedure WriteLogo;
    procedure WriteInfo;
    procedure WriteHelpPages;
    procedure WriteQuickInfo;
    procedure IllegalPara(const opt:string);
    function  Unsetbool(var Opts:string; Pos: Longint):boolean;
    procedure interpret_proc_specific_options(const opt:string);virtual;
    procedure interpret_option(const opt :string;ispara:boolean);
    procedure Interpret_envvar(const envname : string);
    procedure Interpret_file(const filename : string);
    procedure Read_Parameters;
    procedure parsecmd(cmd:string);
    procedure TargetDefines(def:boolean);
  end;

  TOptionClass=class of toption;

var
  coption : TOptionClass;

procedure read_arguments(cmd:string);


implementation

uses
  widestr,
{$ifdef Delphi}
  dmisc,
{$else Delphi}
  dos,
{$endif Delphi}
  version,
  cutils,cmsgs
{$ifdef BrowserLog}
  ,browlog
{$endif BrowserLog}
  ;

const
  page_size = 24;

var
  option     : toption;
  read_configfile,        { read config file, set when a cfgfile is found }
  disable_configfile,
  target_is_set : boolean;  { do not allow contradictory target settings }
  asm_is_set  : boolean; { -T also change initoutputformat if not set idrectly }
  fpcdir,
  ppccfg,
  ppcaltcfg,
  param_file    : string;   { file to compile specified on the commandline }

{****************************************************************************
                                 Defines
****************************************************************************}

procedure def_symbol(const s : string);
begin
  if s='' then
   exit;
  initdefines.insert(upper(s));
  Message1(option_defining_symbol,s);
end;


procedure undef_symbol(const s : string);
begin
  if s='' then
   exit;
  InitDefines.Remove(s);
  Message1(option_undefining_symbol,s);
end;


function check_symbol(const s:string):boolean;
begin
  check_symbol:=(initdefines.find(s)<>nil);
end;


procedure set_default_link_type;
begin
  if (target_info.system in [system_i386_win32,system_i386_wdosx]) then
    begin
      def_symbol('FPC_LINK_SMART');
      undef_symbol('FPC_LINK_STATIC');
      undef_symbol('FPC_LINK_DYNAMIC');
      initglobalswitches:=initglobalswitches+[cs_link_smart];
      initglobalswitches:=initglobalswitches-[cs_link_shared,cs_link_static];
    end
  else
    begin
      undef_symbol('FPC_LINK_SMART');
      def_symbol('FPC_LINK_STATIC');
      undef_symbol('FPC_LINK_DYNAMIC');
      initglobalswitches:=initglobalswitches+[cs_link_static];
      initglobalswitches:=initglobalswitches-[cs_link_shared,cs_link_smart];
    end;
end;



{****************************************************************************
                                 Toption
****************************************************************************}

procedure StopOptions;
begin
  if assigned(Option) then
   begin
     Option.free;
     Option:=nil;
   end;
  DoneVerbose;
  Stop;
end;


procedure Toption.WriteLogo;
var
  p : pchar;
begin
  p:=MessagePchar(option_logo);
  while assigned(p) do
   Comment(V_Normal,GetMsgLine(p));
end;


procedure Toption.WriteInfo;
var
  p : pchar;
  hs,hs1,s : string;
  target : tsystem;
begin
  p:=MessagePchar(option_info);
  while assigned(p) do
   begin
     s:=GetMsgLine(p);
     { list OS Targets }
     if pos('$OSTARGETS',s)>0 then
      begin
        for target:=low(tsystem) to high(tsystem) do
         if assigned(targetinfos[target]) then
          begin
            hs:=s;
            hs1:=targetinfos[target]^.name;
            if tf_under_development in targetinfos[target]^.flags then
             hs1:=hs1+' (under development)';
            Replace(hs,'$OSTARGETS',hs1);
            Comment(V_Normal,hs);
          end;
      end
     else
      Comment(V_Normal,s);
   end;
  StopOptions;
end;


procedure Toption.WriteHelpPages;

  function PadEnd(s:string;i:longint):string;
  begin
    while (length(s)<i) do
     s:=s+' ';
    PadEnd:=s;
  end;

var
  lastident,
  j,outline,
  ident,
  lines : longint;
  show  : boolean;
  opt   : string[32];
  input,
  s     : string;
  p     : pchar;
begin
  WriteLogo;
  Lines:=4;
  Message1(option_usage,system.paramstr(0));
  lastident:=0;
  p:=MessagePChar(option_help_pages);
  while assigned(p) do
   begin
   { get a line and reset }
     s:=GetMsgLine(p);
     ident:=0;
     show:=false;
   { parse options }
     case s[1] of
{$ifdef UNITALIASES}
      'a',
{$endif}
{$ifdef EXTDEBUG}
      'e',
{$endif EXTDEBUG}
{$ifdef i386}
      '3',
{$endif}
{$ifdef powerpc}
      'P',
{$endif}
{$ifdef vis}
      'V',
{$endif}
{$ifdef sparc}
      'S',
{$endif}
{$ifdef m68k}
      '6',
{$endif}
      '*' : show:=true;
     end;
     if show then
      begin
        case s[2] of
{$ifdef GDB}
         'g',
{$endif}
{$ifdef Unix}
         'L',
{$endif}
{$ifdef os2}
         'O',
{$endif}
         '*' : show:=true;
        else
         show:=false;
        end;
      end;
   { now we may show the message or not }
     if show then
      begin
        case s[3] of
         '0' : begin
                 ident:=0;
                 outline:=0;
               end;
         '1' : begin
                 ident:=2;
                 outline:=7;
               end;
         '2' : begin
                 ident:=6;
                 outline:=11;
               end;
         '3' : begin
                 ident:=9;
                 outline:=6;
               end;
        end;
        j:=pos('_',s);
        opt:=Copy(s,4,j-4);
        if opt='*' then
         opt:=''
        else
        if opt=' ' then
         opt:=PadEnd(opt,outline)
        else
         opt:=PadEnd('-'+opt,outline);
        if (ident=0) and (lastident<>0) then
         begin
           Comment(V_Normal,'');
           inc(Lines);
         end;
      { page full ? }
        if (lines >= page_size - 1) then
         begin
           if not NoPressEnter then
            begin
              Message(option_help_press_enter);
              readln(input);
              if upper(input)='Q' then
               StopOptions;
            end;
           lines:=0;
         end;
        Comment(V_Normal,PadEnd('',ident)+opt+Copy(s,j+1,255));
        LastIdent:=Ident;
        inc(Lines);
      end;
   end;
  StopOptions;
end;


procedure Toption.IllegalPara(const opt:string);
begin
  Message1(option_illegal_para,opt);
  Message(option_help_pages_para);
  StopOptions;
end;


function Toption.Unsetbool(var Opts:string; Pos: Longint):boolean;
{ checks if the character after pos in Opts is a + or a - and returns resp.
  false or true. If it is another character (or none), it also returns false }
begin
  UnsetBool := false;
  if Length(Opts)>Pos then
   begin
    inc(Pos);
    UnsetBool := Opts[Pos] = '-';
    if Opts[Pos] in ['-','+']then
     delete(Opts,Pos,1);
   end;
end;


procedure TOption.interpret_proc_specific_options(const opt:string);
begin
end;


procedure TOption.interpret_option(const opt:string;ispara:boolean);
var
  code : integer;
  c    : char;
  more : string;
  major,minor : longint;
  error : integer;
  j,l  : longint;
  d    : DirStr;
  e    : ExtStr;
  s    : string;
  forceasm : tasm;
begin
  if opt='' then
   exit;

  { only parse define,undef,target,verbosity and link options the firsttime }
  if firstpass and
     not((opt[1]='-') and (opt[2] in ['i','d','v','T','u','n','X'])) then
   exit;

  Message1(option_handling_option,opt);
  case opt[1] of
    '-' :
      begin
         more:=Copy(opt,3,255);
         if firstpass then
           Message1(option_interpreting_firstpass_option,opt)
         else
           Message1(option_interpreting_option,opt);
         case opt[2] of
           '?' :
             WriteHelpPages;

           'a' :
             begin
               include(initglobalswitches,cs_asm_leave);
               j:=1;
               while j<=length(more) do
                begin
                  case more[j] of
                    'l' :
                      include(initglobalswitches,cs_asm_source);
                    'r' :
                      include(initglobalswitches,cs_asm_regalloc);
                    't' :
                      include(initglobalswitches,cs_asm_tempalloc);
                    'n' :
                      include(initglobalswitches,cs_asm_nodes);
                    'p' :
                      begin
                        exclude(initglobalswitches,cs_asm_leave);
                        if UnsetBool(More, 0) then
                          exclude(initglobalswitches,cs_asm_pipe)
                        else
                          include(initglobalswitches,cs_asm_pipe);
                      end;
                    '-' :
                      initglobalswitches:=initglobalswitches -
                          [cs_asm_leave, cs_asm_source,cs_asm_regalloc, cs_asm_tempalloc,
                           cs_asm_nodes, cs_asm_pipe];
                    else
                      IllegalPara(opt);
                  end;
                  inc(j);
                end;
             end;

           'A' :
             begin
               if set_target_asm_by_string(More) then
                asm_is_set:=true
               else
                IllegalPara(opt);
             end;

           'b' :
             begin
               if UnsetBool(More,0) then
                begin
                  exclude(initmoduleswitches,cs_browser);
                  exclude(initmoduleswitches,cs_local_browser);
{$ifdef BrowserLog}
                  exclude(initglobalswitches,cs_browser_log);
{$endif}
                end
               else
                begin
                  include(initmoduleswitches,cs_browser);
{$ifdef BrowserLog}
                  include(initglobalswitches,cs_browser_log);
{$endif}
                end;
               if More<>'' then
                 if (More='l') or (More='l+') then
                   include(initmoduleswitches,cs_local_browser)
                 else
                  if More='l-' then
                   exclude(initmoduleswitches,cs_local_browser)
                 else
{$ifdef BrowserLog}
                   browserlog.elements_to_list.insert(more);
{$else}
                   IllegalPara(opt);
{$endif}
             end;

           'B' :
             do_build:=not UnSetBool(more,0);

           'C' :
             begin
               j:=1;
               while j<=length(more) do
                begin
                  case more[j] of
                    'a' :
                      Message2(option_obsolete_switch_use_new,'-Ca','-Or');
                    'c' :
                       begin
                         if not SetAktProcCall(upper(copy(more,j+1,length(more)-j)),true) then
                          IllegalPara(opt);
                         break;
                       end;
{$ifdef cpufpemu}
                    'e' :
                       begin
                         If UnsetBool(More, j) then
                           exclude(initmoduleswitches,cs_fp_emulation)
                         Else
                           include(initmoduleswitches,cs_fp_emulation);
                       end;
{$endif cpufpemu}
                   'f' :
                     begin
                       s:=upper(copy(more,j+1,length(more)-j));
                       if not(SetFpuType(s,true)) then
                         IllegalPara(opt);
                       break;
                     end;
                    'g' :
                      include(initmoduleswitches,cs_create_pic);
                    'h' :
                       begin
                         val(copy(more,j+1,length(more)-j),heapsize,code);
                         if (code<>0) or
{$WARNING Is the upper limit for heapsize needed / useful?}
{                                      (heapsize>=67107840) or   }
                                                           (heapsize<1024) then
                          IllegalPara(opt);
                         break;
                       end;
                    'i' :
                      If UnsetBool(More, j) then
                        exclude(initlocalswitches,cs_check_io)
                      else
                        include(initlocalswitches,cs_check_io);
                    'n' :
                      If UnsetBool(More, j) then
                        exclude(initglobalswitches,cs_link_extern)
                      Else
                        include(initglobalswitches,cs_link_extern);
                    'o' :
                      If UnsetBool(More, j) then
                        exclude(initlocalswitches,cs_check_overflow)
                      Else
                        include(initlocalswitches,cs_check_overflow);
                    'p' :
                      begin
                        s:=upper(copy(more,j+1,length(more)-j));
                        if not(SetProcessor(s,true)) then
                          IllegalPara(opt);
                        break;
                      end;
                    'r' :
                      If UnsetBool(More, j) then
                        exclude(initlocalswitches,cs_check_range)
                      Else
                        include(initlocalswitches,cs_check_range);
                    'R' :
                      If UnsetBool(More, j) then
                        begin
                          exclude(initlocalswitches,cs_check_range);
                          exclude(initlocalswitches,cs_check_object);
                        end
                      Else
                        begin
                          include(initlocalswitches,cs_check_range);
                          include(initlocalswitches,cs_check_object);
                        end;
                    's' :
                      begin
                         val(copy(more,j+1,length(more)-j),stacksize,code);
                         if (code<>0) or (stacksize>=67107840) or (stacksize<1024) then
                          IllegalPara(opt);
                         break;
                      end;
                    't' :
                       If UnsetBool(More, j) then
                         exclude(initlocalswitches,cs_check_stack)
                       Else
                         include(initlocalswitches,cs_check_stack);
                    'D' :
                       If UnsetBool(More, j) then
                         exclude(initmoduleswitches,cs_create_dynamic)
                       Else
                         include(initmoduleswitches,cs_create_dynamic);
                    'X' :
                       If UnsetBool(More, j) then
                         exclude(initmoduleswitches,cs_create_smart)
                       Else
                         include(initmoduleswitches,cs_create_smart);
                    else
                       IllegalPara(opt);
                  end;
                  inc(j);
                end;
             end;

           'd' :
             def_symbol(more);

           'D' :
             begin
               include(initglobalswitches,cs_link_deffile);
               j:=1;
               while j<=length(more) do
                begin
                  case more[j] of
                    'd' :
                      begin
                        description:=Copy(more,j+1,255);
                        break;
                      end;
                    'v' :
                      begin
                        dllversion:=Copy(more,j+1,255);
                        l:=pos('.',dllversion);
                        dllminor:=0;
                        error:=0;
                        if l>0 then
                         begin
                           valint(copy(dllversion,l+1,255),minor,error);
                           if (error=0) and
                              (minor>=0) and (minor<=$ffff) then
                             dllminor:=minor
                           else
                             if error=0 then
                               error:=1;
                         end;
                        if l=0 then
                          l:=256;
                        dllmajor:=1;
                        if error=0 then
                          valint(copy(dllversion,1,l-1),major,error);
                        if (error=0) and (major>=0) and (major<=$ffff) then
                          dllmajor:=major
                        else
                          if error=0 then
                            error:=1;
                        if error<>0 then
                          Message1(scan_w_wrong_version_ignored,dllversion);
                        break;
                      end;
                    'w' :
                      usewindowapi:=true;
                    '-' :
                      begin
                        exclude(initglobalswitches,cs_link_deffile);
                        usewindowapi:=false;
                      end;
                    else
                      IllegalPara(opt);
                  end;
                  inc(j);
                end;
             end;

           'e' :
             exepath:=FixPath(More,true);

           'E' :
             begin
               if UnsetBool(More, 0) then
                 exclude(initglobalswitches,cs_link_extern)
               else
                 include(initglobalswitches,cs_link_extern);
             end;

           'F' :
             begin
               c:=more[1];
               Delete(more,1,1);
               DefaultReplacements(More);
               case c of
                 'c' :
                   begin
                     if not(cpavailable(more)) then
                       Message1(option_code_page_not_available,more)
                     else
                       initsourcecodepage:=more;
                   end;
                 'D' :
                   utilsdirectory:=FixPath(More,true);
                 'e' :
                   SetRedirectFile(More);
                 'E' :
                   OutputExeDir:=FixPath(More,true);
                 'i' :
                   begin
                     if ispara then
                       ParaIncludePath.AddPath(More,false)
                     else
                       includesearchpath.AddPath(More,true);
                   end;
                 'g' :
                   Message2(option_obsolete_switch_use_new,'-Fg','-Fl');
                 'l' :
                   begin
                     if ispara then
                       ParaLibraryPath.AddPath(More,false)
                     else
                       LibrarySearchPath.AddPath(More,true);
                   end;
                 'L' :
                   begin
                     if More<>'' then
                       ParaDynamicLinker:=More
                     else
                       IllegalPara(opt);
                   end;
                 'o' :
                   begin
                     if ispara then
                       ParaObjectPath.AddPath(More,false)
                     else
                       ObjectSearchPath.AddPath(More,true);
                   end;
                 'r' :
                   Msgfilename:=More;
                 'u' :
                   begin
                     if ispara then
                       ParaUnitPath.AddPath(More,false)
                     else
                       unitsearchpath.AddPath(More,true);
                   end;
                 'U' :
                   OutputUnitDir:=FixPath(More,true);
                 else
                   IllegalPara(opt);
               end;
             end;
       'g' : begin
               if UnsetBool(More, 0) then
                begin
                  exclude(initmoduleswitches,cs_debuginfo);
                  exclude(initglobalswitches,cs_gdb_dbx);
                  exclude(initglobalswitches,cs_gdb_gsym);
                  exclude(initglobalswitches,cs_gdb_heaptrc);
                  exclude(initglobalswitches,cs_gdb_lineinfo);
                  exclude(initglobalswitches,cs_checkpointer);
                end
               else
                begin
{$ifdef GDB}
                  include(initmoduleswitches,cs_debuginfo);
                  if not RelocSectionSetExplicitly then
                    RelocSection:=false;
                  j:=1;
                  while j<=length(more) do
                    begin
                      case more[j] of
                        'd' :
                          begin
                            if UnsetBool(More, j) then
                              exclude(initglobalswitches,cs_gdb_dbx)
                            else
                              include(initglobalswitches,cs_gdb_dbx);
                          end;
                       'g' :
                          begin
                            if UnsetBool(More, j) then
                              exclude(initglobalswitches,cs_gdb_gsym)
                            else
                              include(initglobalswitches,cs_gdb_gsym);
                          end;
                        'h' :
                          begin
                            if UnsetBool(More, j) then
                              exclude(initglobalswitches,cs_gdb_heaptrc)
                            else
                              include(initglobalswitches,cs_gdb_heaptrc);
                          end;
                        'l' :
                          begin
                            if UnsetBool(More, j) then
                              exclude(initglobalswitches,cs_gdb_lineinfo)
                            else
                              include(initglobalswitches,cs_gdb_lineinfo);
                          end;
                        'c' :
                          begin
                            if UnsetBool(More, j) then
                              exclude(initglobalswitches,cs_checkpointer)
                            else
                              include(initglobalswitches,cs_checkpointer);
                          end;
                        'v' :
                          begin
                            if UnsetBool(More, j) then
                              exclude(initglobalswitches,cs_gdb_valgrind)
                            else
                              include(initglobalswitches,cs_gdb_valgrind);
                          end;
                        else
                          IllegalPara(opt);
                      end;
                      inc(j);
                    end;
{$else GDB}
                  Message(option_no_debug_support);
                  Message(option_no_debug_support_recompile_fpc);
{$endif GDB}
                end;
             end;

           'h' :
             begin
               NoPressEnter:=true;
               WriteHelpPages;
             end;

           'i' :
             begin
               if More='' then
                 WriteInfo
               else
                 QuickInfo:=QuickInfo+More;
             end;

           'I' :
             begin
               if ispara then
                 ParaIncludePath.AddPath(More,false)
               else
                includesearchpath.AddPath(More,false);
             end;

           'k' :
             begin
               if more<>'' then
                 ParaLinkOptions:=ParaLinkOptions+' '+More
               else
                 IllegalPara(opt);
             end;

           'l' :
             DoWriteLogo:=not UnSetBool(more,0);

           'm' :
             parapreprocess:=not UnSetBool(more,0);

           'n' :
             begin
               if More='' then
                 disable_configfile:=true
               else
                 IllegalPara(opt);
             end;

           'o' :
             begin
               if More<>'' then
                 Fsplit(More,d,OutputFile,e)
               else
                 IllegalPara(opt);
             end;

           'p' :
             begin
               if UnsetBool(More, 0) then
                 begin
                   initmoduleswitches:=initmoduleswitches-[cs_profile];
                   undef_symbol('FPC_PROFILE');
                 end
               else
                 if Length(More)=0 then
                   IllegalPara(opt)
                 else
                 case more[1] of
                  'g' : if UnsetBool(more, 1) then
                         begin
                           exclude(initmoduleswitches,cs_profile);
                           undef_symbol('FPC_PROFILE');
                         end
                        else
                         begin
                           include(initmoduleswitches,cs_profile);
                           def_symbol('FPC_PROFILE');
                        end;
                 else
                   IllegalPara(opt);
                 end;
             end;

{$ifdef Unix}
           'P' : ; { Ignore used by fpc.pp }
{$endif Unix}

           's' :
             begin
               if UnsetBool(More, 0) then
                 begin
                   initglobalswitches:=initglobalswitches-[cs_asm_extern,cs_link_extern];
                   if more<>'' then
                     IllegalPara(opt);
                 end
               else
                 begin
                   initglobalswitches:=initglobalswitches+[cs_asm_extern,cs_link_extern];
                   if more='h' then
                     initglobalswitches:=initglobalswitches-[cs_link_on_target]
                   else if more='t' then
                     initglobalswitches:=initglobalswitches+[cs_link_on_target]
                   else if more='r' then
                     initglobalswitches:=initglobalswitches+[cs_asm_leave,cs_no_regalloc]
                   else if more<>'' then
                     IllegalPara(opt);
                 end;
             end;

           'M' :
             begin
               more:=Upper(more);
               if not SetCompileMode(more, true) then
                 IllegalPara(opt);
             end;

           'S' :
             begin
               if more[1]='I' then
                 begin
                   if upper(more)='ICOM' then
                     initinterfacetype:=it_interfacecom
                   else if upper(more)='ICORBA' then
                     initinterfacetype:=it_interfacecorba
                   else
                     IllegalPara(opt);
                 end
               else
                begin
                  j:=1;
                  while j<=length(more) do
                   begin
                     case more[j] of
                       '2' : //an alternative to -Mobjfpc
                         SetCompileMode('OBJFPC',true);
                       'a' :
                         include(initlocalswitches,cs_do_assertion);
                       'c' :
                         include(initmoduleswitches,cs_support_c_operators);
                       'd' : //an alternative to -Mdelphi
                         SetCompileMode('DELPHI',true);
                       'e' :
                         begin
                           SetErrorFlags(copy(more,j+1,length(more)));
                           break;
                         end;
                       'g' :
                         include(initmoduleswitches,cs_support_goto);
                       'h' :
                         include(initlocalswitches,cs_ansistrings);
                       'i' :
                         include(initmoduleswitches,cs_support_inline);
                       'm' :
                         include(initmoduleswitches,cs_support_macro);
                       'o' : //an alternative to -Mtp
                         SetCompileMode('TP',true);
                       'p' : //an alternative to -Mgpc
                         SetCompileMode('GPC',true);
                       's' :
                         include(initglobalswitches,cs_constructor_name);
                       't' :
                         include(initmoduleswitches,cs_static_keyword);
                       '-' :
                         begin
                           exclude(initglobalswitches,cs_constructor_name);
                           initlocalswitches:=InitLocalswitches - [cs_do_assertion, cs_ansistrings];
                           initmoduleswitches:=initmoduleswitches - [cs_support_c_operators, cs_support_goto,
                                                                     cs_support_inline, cs_support_macro,
                                                                     cs_static_keyword];
                         end;
                       else
                         IllegalPara(opt);
                     end;
                     inc(j);
                   end;
                end;
             end;

           'T' :
             begin
               more:=Upper(More);
               if not target_is_set then
                begin
                  { remove old target define }
                  TargetDefines(false);
                  { Save assembler if set }
                  if asm_is_set then
                   forceasm:=target_asm.id;
                  { load new target }
                  if not(set_target_by_string(More)) then
                    IllegalPara(opt);
                  { also initialize assembler if not explicitly set }
                  if asm_is_set then
                   set_target_asm(forceasm);
                  { set new define }
                  TargetDefines(true);
                  target_is_set:=true;
                end
               else
                if More<>upper(target_info.shortname) then
                 Message1(option_target_is_already_set,target_info.shortname);
             end;

           'u' :
             undef_symbol(upper(More));

           'U' :
             begin
               j:=1;
               while j<=length(more) do
                begin
                  case more[j] of
{$ifdef UNITALIASES}
                    'a' :
                       begin
                         AddUnitAlias(Copy(More,j+1,255));
                         break;
                       end;
{$endif UNITALIASES}
                    'n' :
                      exclude(initglobalswitches,cs_check_unit_name);
                    'p' :
                       begin
                         Message2(option_obsolete_switch_use_new,'-Up','-Fu');
                         break;
                       end;
                    'r' :
                      do_release:=true;
                    's' :
                      include(initmoduleswitches,cs_compilesystem);
                    '-' :
                      begin
                        exclude(initmoduleswitches,cs_compilesystem);
                        exclude(initglobalswitches,cs_check_unit_name);
                      end;
                    else
                      IllegalPara(opt);
                  end;
                  inc(j);
                end;
             end;

           'v' :
             begin
               if not setverbosity(More) then
                 IllegalPara(opt);
             end;

           'V' : ; { Ignore used by fpc }

           'W' :
             begin
               j:=1;
               while j<=length(More) do
                begin
                  case More[j] of
                    'B':
                      begin
                        {  -WB200000 means set trefered base address
                          to $200000, but does not change relocsection boolean
                          this way we can create both relocatble and
                          non relocatable DLL at a specific base address PM }
                        if (length(More)>j) then
                          begin
                            if DLLImageBase=nil then
                              DLLImageBase:=StringDup(Copy(More,j+1,255));
                          end
                        else
                          begin
                            RelocSection:=true;
                            RelocSectionSetExplicitly:=true;
                          end;
                        break;
                      end;
                    'C':
                      begin
                        if UnsetBool(More, j) then
                          apptype:=app_gui
                        else
                          apptype:=app_cui;
                      end;
                    'D':
                      ForceDeffileForExport:=not UnsetBool(More, j);
                    'F':
                      begin
                        if UnsetBool(More, j) then
                          apptype:=app_cui
                        else
                          apptype:=app_fs;
                      end;
                    'G':
                      begin
                        if UnsetBool(More, j) then
                          apptype:=app_cui
                        else
                          apptype:=app_gui;
                      end;
                    'T':
                      begin
                        if UnsetBool(More, j) then
                          apptype:=app_cui
                        else
                          apptype:=app_tool;
                      end;
                    'N':
                      begin
                        RelocSection:=UnsetBool(More,j);
                        RelocSectionSetExplicitly:=true;
                      end;
                    'R':
                      begin
                        { support -WR+ / -WR- as synonyms to -WR / -WN }
                        RelocSection:=not UnsetBool(More,j);
                        RelocSectionSetExplicitly:=true;
                      end;
                    else
                      IllegalPara(opt);
                  end;
                  inc(j);
                end;
             end;

           'X' :
             begin
               j:=1;
               while j<=length(more) do
                begin
                  case More[j] of
                    'i' :
                      include(initglobalswitches,cs_link_internal);
                    'm' :
                      include(initglobalswitches,cs_link_map);
                    'f' :
                      include(initglobalswitches,cs_link_pthread);
                    's' :
                      include(initglobalswitches,cs_link_strip);
                    'c' : Cshared:=TRUE;
                    't' :
                      include(initglobalswitches,cs_link_staticflag);
                    'D' :
                      begin
                        def_symbol('FPC_LINK_DYNAMIC');
                        undef_symbol('FPC_LINK_SMART');
                        undef_symbol('FPC_LINK_STATIC');
                        exclude(initglobalswitches,cs_link_static);
                        exclude(initglobalswitches,cs_link_smart);
                        include(initglobalswitches,cs_link_shared);
                        LinkTypeSetExplicitly:=true;
                      end;
                    'd' : Dontlinkstdlibpath:=TRUE;
                    'P' : Begin
                             utilsprefix:=Copy(more,2,length(More)-1);
                             More:='';
                          End;
                    'r' : Begin
                             rlinkpath:=Copy(more,2,length(More)-1);
                             More:='';
                          end;
                    'S' :
                      begin
                        def_symbol('FPC_LINK_STATIC');
                        undef_symbol('FPC_LINK_SMART');
                        undef_symbol('FPC_LINK_DYNAMIC');
                        include(initglobalswitches,cs_link_static);
                        exclude(initglobalswitches,cs_link_smart);
                        exclude(initglobalswitches,cs_link_shared);
                        LinkTypeSetExplicitly:=true;
                      end;
                    'X' :
                      begin
                        def_symbol('FPC_LINK_SMART');
                        undef_symbol('FPC_LINK_STATIC');
                        undef_symbol('FPC_LINK_DYNAMIC');
                        exclude(initglobalswitches,cs_link_static);
                        include(initglobalswitches,cs_link_smart);
                        exclude(initglobalswitches,cs_link_shared);
                        LinkTypeSetExplicitly:=true;
                      end;
                    '-' :
                      begin
                        exclude(initglobalswitches,cs_link_staticflag);
                        exclude(initglobalswitches,cs_link_strip);
                        exclude(initglobalswitches,cs_link_map);
                        set_default_link_type;
                      end;
                    else
                      IllegalPara(opt);
                  end;
                  inc(j);
                end;
             end;

           { give processor specific options a chance }
           else
             interpret_proc_specific_options(opt);
         end;
       end;

    '@' :
      begin
        Message(option_no_nested_response_file);
        StopOptions;
      end;

    else
      begin
        if (length(param_file)<>0) then
          Message(option_only_one_source_support);
        param_file:=opt;
        Message1(option_found_file,opt);
      end;
  end;
end;


procedure Toption.Interpret_file(const filename : string);

  procedure RemoveSep(var fn:string);
  var
    i : longint;
  begin
    i:=0;
    while (i<length(fn)) and (fn[i+1] in [',',' ',#9]) do
      inc(i);
    Delete(fn,1,i);
    i:=length(fn);
    while (i>0) and (fn[i] in [',',' ',#9]) do
      dec(i);
    fn:=copy(fn,1,i);
  end;

  function GetName(var fn:string):string;
  var
    i : longint;
  begin
    i:=0;
    while (i<length(fn)) and (fn[i+1] in ['a'..'z','A'..'Z','0'..'9','_','-']) do
     inc(i);
    GetName:=Copy(fn,1,i);
    Delete(fn,1,i);
  end;

const
  maxlevel=16;
var
  f     : text;
  s,
  opts  : string;
  skip  : array[0..maxlevel-1] of boolean;
  level : longint;
  option_read : boolean;
begin
{ avoid infinite loop }
  Inc(FileLevel);
  Option_read:=false;
  If FileLevel>MaxLevel then
   Message(option_too_many_cfg_files);
{ open file }
  Message1(option_using_file,filename);
  assign(f,filename);
  {$I-}
  reset(f);
  {$I+}
  if ioresult<>0 then
   begin
     Message1(option_unable_open_file,filename);
     exit;
   end;
  Message1(option_start_reading_configfile,filename);
  fillchar(skip,sizeof(skip),0);
  level:=0;
  while not eof(f) do
   begin
     readln(f,opts);
     RemoveSep(opts);
     if (opts<>'') and (opts[1]<>';') then
      begin
        if opts[1]='#' then
         begin
           Message1(option_interpreting_file_option,opts);
           Delete(opts,1,1);
           s:=upper(GetName(opts));
           if (s='SECTION') then
            begin
              RemoveSep(opts);
              s:=upper(GetName(opts));
              if level=0 then
               skip[level]:=not (check_symbol(s) or (s='COMMON'));
            end
           else
            if (s='IFDEF') then
             begin
               RemoveSep(opts);
               if Level>=maxlevel then
                begin
                  Message(option_too_many_ifdef);
                  stopOptions;
                end;
               inc(Level);
               skip[level]:=(skip[level-1] or (not check_symbol(upper(GetName(opts)))));
             end
           else
            if (s='IFNDEF') then
             begin
               RemoveSep(opts);
               if Level>=maxlevel then
                begin
                  Message(option_too_many_ifdef);
                  stopOptions;
                end;
               inc(Level);
               skip[level]:=(skip[level-1] or (check_symbol(upper(GetName(opts)))));
             end
           else
            if (s='ELSE') then
             skip[level]:=skip[level-1] or (not skip[level])
           else
            if (s='ENDIF') then
             begin
               skip[level]:=false;
               if Level=0 then
                begin
                  Message(option_too_many_endif);
                  stopOptions;
                end;
               dec(level);
             end
           else
            if (not skip[level]) then
             begin
               if (s='DEFINE') then
                begin
                  RemoveSep(opts);
                  def_symbol(upper(GetName(opts)));
                end
              else
               if (s='UNDEF') then
                begin
                  RemoveSep(opts);
                  undef_symbol(upper(GetName(opts)));
                end
              else
               if (s='WRITE') then
                begin
                  Delete(opts,1,1);
                  WriteLn(opts);
                end
              else
               if (s='INCLUDE') then
                begin
                  Delete(opts,1,1);
                  Interpret_file(opts);
                end;
            end;
         end
        else
         begin
           if (opts[1]='-') or (opts[1]='@') then
            begin
              if (not skip[level]) then
                interpret_option(opts,false);
              Option_read:=true;
            end
           else
             Message1(option_illegal_para,opts);
         end;
      end;
   end;
  if Level>0 then
   Message(option_too_less_endif);
  if Not Option_read then
    Message1(option_no_option_found,filename)
  else
    Message1(option_end_reading_configfile,filename);
  Close(f);
  Dec(FileLevel);
end;


procedure Toption.Interpret_envvar(const envname : string);
var
  argstart,
  env,
  pc     : pchar;
  arglen : longint;
  quote  : set of char;
  hs     : string;
begin
  Message1(option_using_env,envname);
  env:=GetEnvPChar(envname);
  pc:=env;
  if assigned(pc) then
   begin
     repeat
       { skip leading spaces }
       while pc^ in [' ',#9,#13] do
        inc(pc);
       case pc^ of
         #0 :
           break;
         '"' :
           begin
             quote:=['"'];
             inc(pc);
           end;
         '''' :
           begin
              quote:=[''''];
              inc(pc);
           end;
         else
           quote:=[' ',#9,#13];
       end;
     { scan until the end of the argument }
       argstart:=pc;
       while (pc^<>#0) and not(pc^ in quote) do
        inc(pc);
     { create argument }
       arglen:=pc-argstart;
       hs[0]:=chr(arglen);
       move(argstart^,hs[1],arglen);
       interpret_option(hs,true);
     { skip quote }
       if pc^ in quote then
        inc(pc);
     until false;
   end
  else
   Message1(option_no_option_found,'(env) '+envname);
  FreeEnvPChar(env);
end;


procedure toption.read_parameters;
var
  opts       : string;
  paramindex : longint;
begin
  paramindex:=0;
  while paramindex<paramcount do
   begin
     inc(paramindex);
     opts:=system.paramstr(paramindex);
     case opts[1] of
       '@' :
         if not firstpass then
         begin
           Delete(opts,1,1);
           Message1(option_reading_further_from,opts);
           interpret_file(opts);
         end;
       '!' :
         if not firstpass then
         begin
           Delete(opts,1,1);
           Message1(option_reading_further_from,'(env) '+opts);
           interpret_envvar(opts);
         end;
       else
         interpret_option(opts,true);
     end;
   end;
end;


procedure toption.parsecmd(cmd:string);
var
  i,ps  : longint;
  opts  : string;
begin
  while (cmd<>'') do
   begin
     while cmd[1]=' ' do
      delete(cmd,1,1);
     i:=pos(' ',cmd);
     if i=0 then
      i:=256;
     opts:=Copy(cmd,1,i-1);
     Delete(cmd,1,i);
     case opts[1] of
       '@' :
         if not firstpass then
         begin
           Delete(opts,1,1);
           Message1(option_reading_further_from,opts);
           interpret_file(opts);
         end;
       '!' :
         if not firstpass then
         begin
           Delete(opts,1,1);
           Message1(option_reading_further_from,'(env) '+opts);
           interpret_envvar(opts);
         end;
       '"' :
         begin
           Delete(opts,1,1);
           ps:=pos('"',cmd);
           if (i<>256) and (ps>0) then
             begin
               opts:=opts + ' '+ copy(cmd,1,ps-1);
               cmd:=copy(cmd,ps+1,255);
             end;
           interpret_option(opts,true);
         end;
       else
         interpret_option(opts,true);
     end;
   end;
end;


procedure toption.writequickinfo;
var
  s : string;
  i : longint;

  procedure addinfo(const hs:string);
  begin
    if s<>'' then
     s:=s+' '+hs
    else
     s:=hs;
  end;

begin
  s:='';
  i:=0;
  while (i<length(quickinfo)) do
   begin
     inc(i);
     case quickinfo[i] of
      'S' :
        begin
          inc(i);
          case quickinfo[i] of
           'O' :
             addinfo(lower(source_info.shortname));
{$ifdef Delphi}
           'P' :
             addinfo('i386');
{$else Delphi}
           'P' :
             addinfo(source_cpu_string);
{$endif Delphi}
           else
             IllegalPara('-i'+QuickInfo);
          end;
        end;
      'T' :
        begin
          inc(i);
          case quickinfo[i] of
           'O' :
             addinfo(lower(target_info.shortname));
           'P' :
             AddInfo(target_cpu_string);
           else
             IllegalPara('-i'+QuickInfo);
          end;
        end;
      'V' :
        AddInfo(version_string);
      'D' :
        AddInfo(date_string);
      '_' :
        ;
      else
        IllegalPara('-i'+QuickInfo);
    end;
  end;
  if s<>'' then
   begin
     writeln(s);
     stopoptions;
   end;
end;


procedure TOption.TargetDefines(def:boolean);
var
  s : string;
  i : integer;
begin
  if def then
   def_symbol(upper(target_info.shortname))
  else
   undef_symbol(upper(target_info.shortname));
  s:=target_info.extradefines;
  while (s<>'') do
   begin
     i:=pos(';',s);
     if i=0 then
      i:=length(s)+1;
     if def then
      def_symbol(Copy(s,1,i-1))
     else
      undef_symbol(Copy(s,1,i-1));
     delete(s,1,i);
   end;
end;


constructor TOption.create;
begin
  DoWriteLogo:=false;
  NoPressEnter:=false;
  FirstPass:=false;
  FileLevel:=0;
  Quickinfo:='';
  ParaIncludePath:=TSearchPathList.Create;
  ParaObjectPath:=TSearchPathList.Create;
  ParaUnitPath:=TSearchPathList.Create;
  ParaLibraryPath:=TSearchPathList.Create;
  FillChar(ParaAlignment,sizeof(ParaAlignment),0);
end;


destructor TOption.destroy;
begin
  ParaIncludePath.Free;
  ParaObjectPath.Free;
  ParaUnitPath.Free;
  ParaLibraryPath.Free;
end;


{****************************************************************************
                              Callable Routines
****************************************************************************}

function check_configfile(const fn:string;var foundfn:string):boolean;

  function CfgFileExists(const fn:string):boolean;
  begin
    Comment(V_Tried,'Configfile search: '+fn);
    CfgFileExists:=FileExists(fn);
  end;

var
  configpath : pathstr;
begin
  foundfn:=fn;
  check_configfile:=true;
  { retrieve configpath }
{$ifdef Delphi}
  configpath:=FixPath(dmisc.getenv('PPC_CONFIG_PATH'),false);
{$else Delphi}
  configpath:=FixPath(dos.getenv('PPC_CONFIG_PATH'),false);
{$endif Delphi}
{$ifdef Unix}
  if configpath='' then
   configpath:='/etc/';
{$endif}
  {
    Order to read configuration file :
    try reading fpc.cfg in :
     1 - current dir
     2 - configpath
     3 - compiler path
  }
  if not FileExists(fn) then
   begin
{$ifdef Unix}
     if (dos.getenv('HOME')<>'') and CfgFileExists(FixPath(dos.getenv('HOME'),false)+'.'+fn) then
      foundfn:=FixPath(dos.getenv('HOME'),false)+'.'+fn
     else
{$endif}
      if CfgFileExists(configpath+fn) then
       foundfn:=configpath+fn
     else
{$ifndef Unix}
      if CfgFileExists(exepath+fn) then
       foundfn:=exepath+fn
     else
{$endif}
      check_configfile:=false;
   end;
end;


procedure read_arguments(cmd:string);
begin
  option:=coption.create;
  disable_configfile:=false;

{ default defines }
  def_symbol(upper(target_info.shortname));
  def_symbol('FPC');
  def_symbol('VER'+version_nr);
  def_symbol('VER'+version_nr+'_'+release_nr);
  def_symbol('VER'+version_nr+'_'+release_nr+'_'+patch_nr);

{ Temporary defines, until things settle down }
  def_symbol('HASWIDECHAR');
  def_symbol('HASWIDESTRING');
  def_symbol('HASOUT');
  def_symbol('HASGLOBALPROPERTY');
  def_symbol('FPC_HASPREFETCH');
{$ifdef i386}
  def_symbol('HASINTF');
  def_symbol('HASVARIANT');
{$endif i386}
{$ifdef powerpc}
  def_symbol('HASINTF');
  def_symbol('HASVARIANT');
  def_symbol('FPC_MTFSB0_CORRECTED');
{$endif powerpc}
{$ifdef arm}
  def_symbol('HASINTF');
  def_symbol('HASVARIANT');
{$endif arm}
  def_symbol('INTERNSETLENGTH');
  def_symbol('INTERNLENGTH');
  def_symbol('INTERNCOPY');
  def_symbol('INT64FUNCRESOK');
  def_symbol('HAS_ADDR_STACK_ON_STACK');
  def_symbol('NOBOUNDCHECK');
  def_symbol('HASCOMPILERPROC');
  def_symbol('VALUEGETMEM');
  def_symbol('VALUEFREEMEM');
  def_symbol('HASCURRENCY');
  def_symbol('HASTHREADVAR');
  def_symbol('HAS_GENERICCONSTRUCTOR');
  def_symbol('NOCLASSHELPERS');
  if pocall_default = pocall_register then
    def_symbol('REGCALL');
  def_symbol('DECRREFNOTNIL');
  def_symbol('HAS_INTERNAL_INTTYPES');

{ using a case is pretty useless here (FK) }
{ some stuff for TP compatibility }
{$ifdef i386}
  def_symbol('CPU86');
  def_symbol('CPU87');
{$endif}
{$ifdef m68k}
  def_symbol('CPU68');
{$endif}

{ new processor stuff }
{$ifdef i386}
  def_symbol('CPUI386');
  def_symbol('CPU32');
  def_symbol('FPC_HAS_TYPE_EXTENDED');
  def_symbol('FPC_HAS_TYPE_DOUBLE');
  def_symbol('FPC_HAS_TYPE_SINGLE');
{$endif}
{$ifdef m68k}
  def_symbol('CPU68K');
  def_symbol('CPUM68K');
  def_symbol('CPU32');
  def_symbol('FPC_CURRENCY_IS_INT64');
  def_symbol('FPC_COMP_IS_INT64');
{$endif}
{$ifdef ALPHA}
  def_symbol('CPUALPHA');
  def_symbol('CPU64');
{$endif}
{$ifdef powerpc}
  def_symbol('CPUPOWERPC');
  def_symbol('CPUPOWERPC32');
  def_symbol('CPU32');
  def_symbol('FPC_HAS_TYPE_DOUBLE');
  def_symbol('FPC_HAS_TYPE_SINGLE');
  def_symbol('FPC_INCLUDE_SOFTWARE_INT64_TO_DOUBLE');
  def_symbol('FPC_CURRENCY_IS_INT64');
  def_symbol('FPC_COMP_IS_INT64');
{$endif}
{$ifdef iA64}
  def_symbol('CPUIA64');
  def_symbol('CPU64');
{$endif}
{$ifdef x86_64}
  def_symbol('CPUX86_64');
  def_symbol('CPU64');
  { not supported for now, afaik (FK)
   def_symbol('FPC_HAS_TYPE_FLOAT128'); }
  def_symbol('FPC_HAS_TYPE_EXTENDED');
  def_symbol('FPC_HAS_TYPE_DOUBLE');
  def_symbol('FPC_HAS_TYPE_SINGLE');
{$endif}
{$ifdef sparc}
  def_symbol('CPUSPARC');
  def_symbol('CPUSPARC32');
  def_symbol('CPU32');
  def_symbol('FPC_HAS_TYPE_DOUBLE');
  def_symbol('FPC_HAS_TYPE_SINGLE');
  def_symbol('FPC_INCLUDE_SOFTWARE_INT64_TO_DOUBLE');
  def_symbol('FPC_CURRENCY_IS_INT64');
  def_symbol('FPC_COMP_IS_INT64');
{$endif}
{$ifdef vis}
  def_symbol('CPUVIS');
  def_symbol('CPU32');
{$endif}
{$ifdef arm}
  def_symbol('CPUARM');
  def_symbol('CPU32');
  def_symbol('FPC_HAS_TYPE_DOUBLE');
  def_symbol('FPC_HAS_TYPE_SINGLE');
  def_symbol('FPC_INCLUDE_SOFTWARE_INT64_TO_DOUBLE');
  def_symbol('FPC_CURRENCY_IS_INT64');
  def_symbol('FPC_COMP_IS_INT64');
  def_symbol('FPC_REQUIRES_PROPER_ALIGNMENT');
{$endif arm}

{ get default messagefile }
{$ifdef Delphi}
  msgfilename:=dmisc.getenv('PPC_ERROR_FILE');
{$else Delphi}
  msgfilename:=dos.getenv('PPC_ERROR_FILE');
{$endif Delphi}

   { default configfile can be specified on the commandline,
     remove it first }
   if (cmd<>'') and (cmd[1]='[') then
    begin
      ppccfg:=Copy(cmd,2,pos(']',cmd)-2);
      Delete(cmd,1,pos(']',cmd));
    end
   else
    begin
      ppccfg:='fpc.cfg';
      ppcaltcfg:='ppc386.cfg';
    end;

   { read the parameters quick, only -i -v -T }
   option.firstpass:=true;
   if cmd<>'' then
     option.parsecmd(cmd)
   else
    begin
      option.read_parameters;
      { Write only quickinfo }
      if option.quickinfo<>'' then
       option.writequickinfo;
    end;
   option.firstpass:=false;

  { read configuration file }
  if (not disable_configfile) and
     (ppccfg<>'') then
    begin
      read_configfile:=check_configfile(ppccfg,ppccfg);
      { Maybe alternative configfile ? }
      if (not read_configfile) and
         (ppcaltcfg<>'') then
        read_configfile:=check_configfile(ppcaltcfg,ppccfg);
    end
  else
    read_configfile := false;

{ Read commandline and configfile }
  target_is_set:=false;
  asm_is_set:=false;
  param_file:='';

  { read configfile }
  if read_configfile then
    option.interpret_file(ppccfg);

  { read parameters again to override config file }
  if cmd<>'' then
    option.parsecmd(cmd)
  else
    begin
      option.read_parameters;
      { Write only quickinfo }
      if option.quickinfo<>'' then
       option.writequickinfo;
    end;

{ Write help pages }
  if (cmd='') and (paramcount=0) then
   Option.WriteHelpPages;

{ Stop if errors in options }
  if ErrorCount>0 then
   StopOptions;

  { Non-core target defines }
  Option.TargetDefines(true);

  { endian define }
  case target_info.endian of
    endian_little :
      begin
         def_symbol('ENDIAN_LITTLE');
         def_symbol('FPC_LITTLE_ENDIAN');
      end;
    endian_big :
      begin
         def_symbol('ENDIAN_BIG');
         def_symbol('FPC_BIG_ENDIAN');
      end;
  end;

  { abi define }
  case target_info.abi of
    abi_powerpc_sysv :
      def_symbol('FPC_ABI_SYSV');
    abi_powerpc_aix :
      def_symbol('FPC_ABI_AIX');
  end;

{$ifdef m68k}
  if initoptprocessor=MC68020 then
    def_symbol('CPUM68020');
{$endif m68k}

{ write logo if set }
  if option.DoWriteLogo then
   option.WriteLogo;

{ Check file to compile }
  if param_file='' then
   begin
     Message(option_no_source_found);
     StopOptions;
   end;
{$ifndef Unix}
  param_file:=FixFileName(param_file);
{$endif}
  fsplit(param_file,inputdir,inputfile,inputextension);
  if inputextension='' then
   begin
     if FileExists(inputdir+inputfile+target_info.sourceext) then
      inputextension:=target_info.sourceext
     else
      if FileExists(inputdir+inputfile+target_info.pasext) then
       inputextension:=target_info.pasext;
   end;

  { Add paths specified with parameters to the searchpaths }
  UnitSearchPath.AddList(option.ParaUnitPath,true);
  ObjectSearchPath.AddList(option.ParaObjectPath,true);
  IncludeSearchPath.AddList(option.ParaIncludePath,true);
  LibrarySearchPath.AddList(option.ParaLibraryPath,true);

  { add unit environment and exepath to the unit search path }
  if inputdir<>'' then
   Unitsearchpath.AddPath(inputdir,true);
  if not disable_configfile then
   begin
{$ifdef Delphi}
     UnitSearchPath.AddPath(dmisc.getenv(target_info.unit_env),false);
{$else}
     UnitSearchPath.AddPath(dos.getenv(target_info.unit_env),false);
{$endif Delphi}
   end;

{$ifdef Unix}
  fpcdir:=FixPath(getenv('FPCDIR'),false);
  if fpcdir='' then
   begin
     if source_info.cpu<>target_info.cpu then
       begin
         if PathExists('/usr/local/lib/fpc/'+version_string+'/cross/'+cpu2str[target_info.cpu]+'-'+target_info.shortname) then
           fpcdir:='/usr/local/lib/fpc/'+version_string+'/cross/'+cpu2str[target_info.cpu]+'-'+target_info.shortname+'/'
         else
           fpcdir:='/usr/lib/fpc/'+version_string+'/cross/'+cpu2str[target_info.cpu]+'-'+target_info.shortname+'/';
       end
     else
       begin
         if PathExists('/usr/local/lib/fpc/'+version_string) then
           fpcdir:='/usr/local/lib/fpc/'+version_string+'/'
         else
           fpcdir:='/usr/lib/fpc/'+version_string+'/';
       end;
   end;
{$else}
  fpcdir:=FixPath(getenv('FPCDIR'),false);
  if fpcdir='' then
   begin
     fpcdir:=ExePath+'../';
     if not(PathExists(fpcdir+'/units')) and
        not(PathExists(fpcdir+'/rtl')) then
      fpcdir:=fpcdir+'../';
   end;
{$endif}
  { first try development RTL, else use the default installation path }
  if not disable_configfile then
    begin
      if source_info.cpu<>target_info.cpu then
        begin
          if PathExists(FpcDir+'rtl/'+lower(target_info.shortname)) then
           UnitSearchPath.AddPath(FpcDir+'rtl/'+lower(target_info.shortname),false)
          else
           begin
             UnitSearchPath.AddPath(FpcDir+'units/',false);
             UnitSearchPath.AddPath(FpcDir+'units/rtl',false);
           end;
        end
      else
        begin
          if PathExists(FpcDir+'rtl/'+lower(target_info.shortname)) then
           UnitSearchPath.AddPath(FpcDir+'rtl/'+lower(target_info.shortname),false)
          else
           begin
             UnitSearchPath.AddPath(FpcDir+'units/'+lower(target_info.shortname),false);
             UnitSearchPath.AddPath(FpcDir+'units/'+lower(target_info.shortname)+'/rtl',false);
           end;
        end;
    end;
  { Add exepath if the exe is not in the current dir, because that is always searched already.
    Do not add it when linking on the target because then we can maybe already find
    .o files that are not for the target }
  if (ExePath<>GetCurrentDir) and
     not(cs_link_on_target in initglobalswitches) then
   UnitSearchPath.AddPath(ExePath,false);
  { Add unit dir to the object and library path }
  objectsearchpath.AddList(unitsearchpath,false);
  librarysearchpath.AddList(unitsearchpath,false);

  { switch assembler if it's binary and we got -a on the cmdline }
  if (cs_asm_leave in initglobalswitches) and
     (target_asm.outputbinary) then
   begin
     Message(option_switch_bin_to_src_assembler);
     set_target_asm(target_info.assemextern);
   end;

  if (target_asm.supported_target <> system_any) and
     (target_asm.supported_target <> target_info.system) then
   begin
     Message2(option_incompatible_asm,target_asm.idtxt,target_info.name);
     set_target_asm(target_info.assemextern);
     Message1(option_asm_forced,target_asm.idtxt);
   end;

  { turn off stripping if compiling with debuginfo or profile }
  if (cs_debuginfo in initmoduleswitches) or
     (cs_profile in initmoduleswitches) then
    exclude(initglobalswitches,cs_link_strip);

  if not LinkTypeSetExplicitly then
   set_default_link_type;

  { Default alignment settings,
    1. load the defaults for the target
    2. override with generic optimizer setting (little size)
    3. override with the user specified -Oa }
  UpdateAlignment(initalignment,target_info.alignment);
  if (cs_littlesize in aktglobalswitches) then
   begin
     initalignment.procalign:=1;
     initalignment.jumpalign:=1;
     initalignment.loopalign:=1;
   end;
  UpdateAlignment(initalignment,option.paraalignment);

  option.free;
  Option:=nil;
end;


initialization
  coption:=toption;
finalization
  if assigned(option) then
   option.free;
end.
{
  $Log$
  Revision 1.134  2004-05-06 20:30:51  florian
    * m68k compiler compilation fixed

  Revision 1.133  2004/04/04 18:46:09  olle
    + added $APPTYPE TOOL for MPW tools on MacOS

  Revision 1.132  2004/03/29 19:19:35  florian
    + arm floating point register saving implemented
    * hopefully stabs generation for MacOSX fixed
    + some defines for arm added

  Revision 1.131  2004/03/27 23:23:03  florian
    + added FPC_COMP_IS_INT64 define

  Revision 1.130  2004/03/23 22:34:49  peter
    * constants ordinals now always have a type assigned
    * integer constants have the smallest type, unsigned prefered over
      signed

  Revision 1.129  2004/03/21 22:40:15  florian
    + added interface support for the arm
    * added  FPC_REQUIRES_PROPER_ALIGNMENT define for targets which require proper alignment

  Revision 1.128  2004/03/20 22:57:07  florian
    + cross compilation dir search added

  Revision 1.127  2004/03/10 22:52:57  peter
    * more stabs fixes
    * special mode -gv for valgrind compatible stabs

  Revision 1.126  2004/03/02 17:32:12  florian
    * make cycle fixed
    + pic support for darwin
    + support of importing vars from shared libs on darwin implemented

  Revision 1.125  2004/02/22 12:04:04  florian
    + nx86set added
    * some more x86-64 fixes

  Revision 1.124  2004/02/15 16:34:18  marco
   * pthread on -CURRENT related fixes.

  Revision 1.123  2004/02/03 00:42:08  florian
    + FPC_PREFETCH defined

  Revision 1.122  2004/01/24 18:12:40  florian
    * fixed several arm floating point issues

  Revision 1.121  2004/01/21 22:13:20  peter
    * decrrefcount resets temps to nil

  Revision 1.120  2004/01/10 00:16:21  jonas
    * fixed mtfsb0 instruction for assembler reader/writer
    * fixed initialisation of fpscr register to avoid spurious SIGPFE's
      (uses mtfsb0 instruction, so added extra define in options.pas to avoid
      requiring to start with a cross compiler)

  Revision 1.119  2004/01/02 17:19:04  jonas
    * if currency = int64, FPC_CURRENCY_IS_INT64 is defined
    + round and trunc for currency and comp if FPC_CURRENCY_IS_INT64 is
      defined
    * if currency = orddef, prefer currency -> int64/qword conversion over
      currency -> float conversions
    * optimized currency/currency if currency = orddef
    * TODO: write FPC_DIV_CURRENCY and FPC_MUL_CURRENCY routines to prevent
        precision loss if currency=int64 and bestreal = double

  Revision 1.118  2003/12/17 22:50:42  hajny
    * fixed incorrect error message

  Revision 1.117  2003/12/11 18:15:06  florian
    * HASGLOBALPROPERTY define introduce

  Revision 1.116  2003/12/10 01:54:44  florian
    * variants and interfaces on powerpc released

  Revision 1.115  2003/11/11 21:10:34  peter
    * define REGCALL when pocall_default=pocall_register

  Revision 1.114  2003/11/07 15:58:32  florian
    * Florian's culmutative nr. 1; contains:
      - invalid calling conventions for a certain cpu are rejected
      - arm softfloat calling conventions
      - -Sp for cpu dependend code generation
      - several arm fixes
      - remaining code for value open array paras on heap

  Revision 1.113  2003/10/22 15:40:44  marco
   * -Xc -Xr support

  Revision 1.112  2003/10/18 09:14:18  hajny
    * upper limit for heapsize removed

  Revision 1.110  2003/10/14 00:30:48  florian
    + some code for PIC support added

  Revision 1.109  2003/10/11 19:32:04  marco
   * -Xd

  Revision 1.108  2003/10/08 19:17:43  peter
    * -P to -ap
    * -V to -vv

  Revision 1.107  2003/10/03 14:16:48  marco
   * -XP<prefix> support

  Revision 1.106  2003/09/17 21:37:07  olle
    + added command line option for language mode -M<x>

  Revision 1.105  2003/09/14 21:33:11  peter
    * don't check exepath when linking on target

  Revision 1.104  2003/09/06 10:41:54  olle
    + compiler now define abi macros for powerpc FPC_ABI_AIX or FPC_ABI_SYSV

  Revision 1.103  2003/09/05 17:41:12  florian
    * merged Wiktor's Watcom patches in 1.1

  Revision 1.102  2003/09/03 21:06:05  peter
    * powerpc needs software int64 to double

  Revision 1.101  2003/09/03 15:55:01  peter
    * NEWRA branch merged

  Revision 1.100  2003/09/03 11:18:37  florian
    * fixed arm concatcopy
    + arm support in the common compiler sources added
    * moved some generic cg code around
    + tfputype added
    * ...

  Revision 1.99.2.4  2003/09/02 17:48:42  peter
    * sparc need software int64 to double

  Revision 1.99.2.3  2003/09/01 21:02:55  peter
    * sparc updates for new tregister

  Revision 1.99.2.2  2003/08/31 16:18:05  peter
    * more fixes

  Revision 1.99.2.1  2003/08/31 13:50:15  daniel
    * Remove sorting and use pregenerated indexes
    * Some work on making things compile

  Revision 1.99  2003/05/13 19:14:41  peter
    * failn removed
    * inherited result code check moven to pexpr

  Revision 1.98  2003/05/11 19:17:16  florian
    * FPC_LITTLE_ENDIAN and FPC_BIG_ENDIAN is now defined as well

  Revision 1.97  2003/05/01 07:59:42  florian
    * introduced defaultordconsttype to decribe the default size of ordinal constants
      on 64 bit CPUs it's equal to cs64bitdef while on 32 bit CPUs it's equal to s32bitdef
    + added defines CPU32 and CPU64 for 32 bit and 64 bit CPUs
    * int64s/qwords are allowed as for loop counter on 64 bit CPUs

  Revision 1.96  2003/04/30 16:35:00  florian
    * fixed defines for x86-64

  Revision 1.95  2003/04/24 11:21:45  florian
    + HAS_TYPE_* defines for floats on i386 and powerpc added

  Revision 1.94  2003/03/28 19:16:56  peter
    * generic constructor working for i386
    * remove fixed self register
    * esi added as address register for i386

  Revision 1.93  2003/03/23 23:20:38  hajny
    + emx target added

  Revision 1.92  2003/03/08 08:59:07  daniel
    + $define newra will enable new register allocator
    + getregisterint will return imaginary registers with $newra
    + -sr switch added, will skip register allocation so you can see
      the direct output of the code generator before register allocation

  Revision 1.91  2002/12/06 16:56:58  peter
    * only compile cs_fp_emulation support when cpufpuemu is defined
    * define cpufpuemu for m68k only

  Revision 1.90  2002/11/30 23:14:55  carl
    - removed cs_fp_emulation checking for m68k, its now controled
      by a global switch
    + added powerpc/sparc/vis message options support

  Revision 1.89  2002/11/30 21:29:56  carl
    + -Ce for softfpu

  Revision 1.88  2002/11/15 01:58:52  peter
    * merged changes from 1.0.7 up to 04-11
      - -V option for generating bug report tracing
      - more tracing for option parsing
      - errors for cdecl and high()
      - win32 import stabs
      - win32 records<=8 are returned in eax:edx (turned off by default)
      - heaptrc update
      - more info for temp management in .s file with EXTDEBUG

  Revision 1.87  2002/10/23 17:07:40  peter
    * fix -n that was broken in the previous commit

  Revision 1.86  2002/10/23 16:57:16  peter
    * first search for fpc.cfg instead of deprecated ppc386.cfg
    * parse commandline options first before searching configfile so -vt
      can be used to display the searched files

  Revision 1.85  2002/10/13 21:33:01  peter
    * define HASTHREADVAR

  Revision 1.84  2002/10/02 18:20:52  peter
    * Copy() is now internal syssym that calls compilerprocs

  Revision 1.83  2002/09/22 14:02:35  carl
    * stack checking cannot be called before system unit is initialized
    * MC68020 define

  Revision 1.82  2002/08/12 15:08:40  carl
    + stab register indexes for powerpc (moved from gdb to cpubase)
    + tprocessor enumeration moved to cpuinfo
    + linker in target_info is now a class
    * many many updates for m68k (will soon start to compile)
    - removed some ifdef or correct them for correct cpu

  Revision 1.81  2002/08/10 14:46:29  carl
    + moved target_cpu_string to cpuinfo
    * renamed asmmode enum.
    * assembler reader has now less ifdef's
    * move from nppcmem.pas -> ncgmem.pas vec. node.

  Revision 1.80  2002/08/09 19:15:41  carl
     - removed newcg define

  Revision 1.79  2002/07/26 22:22:10  florian
    * several PowerPC related fixes to get forward with system unit compilation

  Revision 1.78  2002/07/26 21:15:39  florian
    * rewrote the system handling

  Revision 1.77  2002/07/20 17:16:03  florian
    + source code page support

  Revision 1.76  2002/07/04 20:43:01  florian
    * first x86-64 patches

  Revision 1.75  2002/07/01 18:46:24  peter
    * internal linker
    * reorganized aasm layer

  Revision 1.74  2002/07/01 16:23:53  peter
    * cg64 patch
    * basics for currency
    * asnode updates for class and interface (not finished)

  Revision 1.73  2002/05/18 13:34:11  peter
    * readded missing revisions

  Revision 1.72  2002/05/16 19:46:41  carl
  + defines.inc -> fpcdefs.inc to avoid conflicts if compiling by hand
  + try to fix temp allocation (still in ifdef)
  + generic constructor calls
  + start of tassembler / tmodulebase class cleanup

  Revision 1.70  2002/05/12 16:53:08  peter
    * moved entry and exitcode to ncgutil and cgobj
    * foreach gets extra argument for passing local data to the
      iterator function
    * -CR checks also class typecasts at runtime by changing them
      into as
    * fixed compiler to cycle with the -CR option
    * fixed stabs with elf writer, finally the global variables can
      be watched
    * removed a lot of routines from cga unit and replaced them by
      calls to cgobj
    * u32bit-s32bit updates for and,or,xor nodes. When one element is
      u32bit then the other is typecasted also to u32bit without giving
      a rangecheck warning/error.
    * fixed pascal calling method with reversing also the high tree in
      the parast, detected by tcalcst3 test

  Revision 1.69  2002/04/21 19:02:04  peter
    * removed newn and disposen nodes, the code is now directly
      inlined from pexpr
    * -an option that will write the secondpass nodes to the .s file, this
      requires EXTDEBUG define to actually write the info
    * fixed various internal errors and crashes due recent code changes

  Revision 1.68  2002/04/20 21:32:24  carl
  + generic FPC_CHECKPOINTER
  + first parameter offset in stack now portable
  * rename some constants
  + move some cpu stuff to other units
  - remove unused constents
  * fix stacksize for some targets
  * fix generic size problems which depend now on EXTEND_SIZE constant

  Revision 1.67  2002/04/07 10:22:35  carl
  + CPU defines now depends on current target

  Revision 1.66  2002/04/04 19:05:58  peter
    * removed unused units
    * use tlocation.size in cg.a_*loc*() routines

  Revision 1.65  2002/04/04 18:39:45  carl
  + added wdosx support (patch from Pavel)
}