fpc/compiler/options.pas

{
    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,
    ParaLogo,
    NoPressEnter,
    LogoWritten : 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,
{$IFDEF USE_SYSUTILS}
  SysUtils,
{$ELSE USE_SYSUTILS}
  dos,
{$ENDIF USE_SYSUTILS}
  version,
  cutils,cmsgs,
  comphook,
  symtable
{$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 set_default_link_type;
begin
  { win32 and wdosx need smartlinking by default to prevent including too much
    dll dependencies }
  if (target_info.system in [system_i386_win32,system_i386_wdosx]) then
    begin
      def_system_macro('FPC_LINK_SMART');
      undef_system_macro('FPC_LINK_STATIC');
      undef_system_macro('FPC_LINK_DYNAMIC');
      initglobalswitches:=initglobalswitches+[cs_link_smart];
      initglobalswitches:=initglobalswitches-[cs_link_shared,cs_link_static];
    end
  else
    begin
      undef_system_macro('FPC_LINK_SMART');
      def_system_macro('FPC_LINK_STATIC');
      undef_system_macro('FPC_LINK_DYNAMIC');
      initglobalswitches:=initglobalswitches+[cs_link_static];
      initglobalswitches:=initglobalswitches-[cs_link_shared,cs_link_smart];
    end;
end;



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

procedure StopOptions(err:longint);
begin
  if assigned(Option) then
   begin
     Option.free;
     Option:=nil;
   end;
  raise ECompilerAbortSilent.Create;
end;


procedure Toption.WriteLogo;
var
  p : pchar;
begin
  if not LogoWritten then
    begin
      p:=MessagePchar(option_logo);
      while assigned(p) do
        Comment(V_Normal,GetMsgLine(p));
      LogoWritten:= true;
    end;
end;


procedure Toption.WriteInfo;
var
  p : pchar;
  hs,hs1,s : TCmdStr;
  target : tsystem;
  cpu : tprocessors;
  fpu : tfputype;
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 if pos('$INSTRUCTIONSETS',s)>0 then
      begin
        for cpu:=low(tprocessors) to high(tprocessors) do
          begin
            hs:=s;
            hs1:=processorsstr[cpu];
            if hs1<>'' then
              begin
                Replace(hs,'$INSTRUCTIONSETS',hs1);
                Comment(V_Normal,hs);
              end;
          end;
      end
     else if pos('$FPUINSTRUCTIONSETS',s)>0 then
      begin
        for fpu:=low(tfputype) to high(tfputype) do
          begin
            hs:=s;
            hs1:=fputypestr[fpu];
            if hs1<>'' then
              begin
                Replace(hs,'$FPUINSTRUCTIONSETS',hs1);
                Comment(V_Normal,hs);
              end;
          end;
      end
     else
      Comment(V_Normal,s);
   end;
  StopOptions(0);
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,FixFileName(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}
{$ifdef x86_64}
      '4',
{$endif}
{$ifdef m68k}
      '6',
{$endif}
{$ifdef arm}
      'S',
{$endif}
{$ifdef powerpc}
      'P',
{$endif}
{$ifdef sparc}
      'S',
{$endif}
{$ifdef vis}
      'V',
{$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:=11;
               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(0);
            end;
           lines:=0;
         end;
        Comment(V_Normal,PadEnd('',ident)+opt+Copy(s,j+1,255));
        LastIdent:=Ident;
        inc(Lines);
      end;
   end;
  StopOptions(0);
end;


procedure Toption.IllegalPara(const opt:string);
begin
  Message1(option_illegal_para,opt);
  Message(option_help_pages_para);
  StopOptions(1);
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,link etc options the firsttime }
  if firstpass and
     not(
         (opt[1]='-') and
         (
          ((length(opt)>1) and (opt[2] in ['i','d','v','T','u','n','X','l'])) or
          ((length(opt)>3) and (opt[2]='F') and (opt[3]='e'))
         )
        ) 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
{$ifdef supportbrowser}
               if UnsetBool(More,0) then
                begin
                  exclude(initmoduleswitches,cs_browser);
                  exclude(initmoduleswitches,cs_local_browser);
{$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}
{$endif supportbrowser}
             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 (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' :
             if more <> '' then
               def_system_macro(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
                           val(copy(dllversion,l+1,255),minor,error);
                           if (error=0) and
                              (minor>=0) and (minor<=$ffff) then
                             dllminor:=minor
                           else
                             if error=0 then
                               error:=1;
                         end;
                        if l=0 then
                          l:=256;
                        dllmajor:=1;
                        if error=0 then
                          val(copy(dllversion,1,l-1),major,error);
                        if (error=0) and (major>=0) and (major<=$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
                 'a' :
                   autoloadunits:=more;
                 'c' :
                   begin
                     if (upper(more)='UTF8') or (upper(more)='UTF-8') then
                        initsourcecodepage:='utf8'
                     else 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(initlocalswitches,cs_checkpointer);
                end
               else
                begin
{$ifdef GDB}
                  include(initmoduleswitches,cs_debuginfo);
{$else GDB}
                  Message(option_no_debug_support);
                  Message(option_no_debug_support_recompile_fpc);
{$endif GDB}
                end;
{$ifdef GDB}
               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(initlocalswitches,cs_checkpointer)
                         else
                           include(initlocalswitches,cs_checkpointer);
                       end;
                     'v' :
                       begin
                         if UnsetBool(More, j) then
                           exclude(initglobalswitches,cs_gdb_valgrind)
                         else
                           include(initglobalswitches,cs_gdb_valgrind);
                       end;
                     'w' :
                       begin
                         if UnsetBool(More, j) then
                           exclude(initglobalswitches,cs_gdb_dwarf)
                         else
                           include(initglobalswitches,cs_gdb_dwarf);
                       end;
                     else
                       IllegalPara(opt);
                   end;
                   inc(j);
                 end;
{$endif GDB}
             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' :
             if not UnSetBool(more,0) then
               ParaLogo:=true;

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

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

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

           'N' :
             begin
               j:=1;
               while j<=length(more) do
                begin
                  case more[j] of
                    'u' :
                      initglobalswitches:=initglobalswitches+[cs_loopunroll];
                     else
                       IllegalPara(opt);
                  end;
                  inc(j);
                end;
             end;

           'o' :
             begin
               if More<>'' then
{$IFDEF USE_SYSUTILS}
               begin
                 d := SplitPath(More);
                 OutputFile := SplitFileName(More);
               end
{$ELSE USE_SYSUTILS}
                 Fsplit(More,d,OutputFile,e)
{$ENDIF USE_SYSUTILS}
               else
                 IllegalPara(opt);
             end;

           'p' :
             begin
               if UnsetBool(More, 0) then
                 begin
                   initmoduleswitches:=initmoduleswitches-[cs_profile];
                   undef_system_macro('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_system_macro('FPC_PROFILE');
                         end
                        else
                         begin
                           include(initmoduleswitches,cs_profile);
                           def_system_macro('FPC_PROFILE');
                        end;
                 else
                   IllegalPara(opt);
                 end;
             end;

           'P' : ; { Ignore used by fpc.pp }

           '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;

           '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' :
             if more <> '' then
               undef_system_macro(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':
                      begin
                        UseDeffileForExports:=not UnsetBool(More, j);
                        UseDeffileForExportsSetExplicitly:=true;
                      end;
                    '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_system_macro('FPC_LINK_DYNAMIC');
                        undef_system_macro('FPC_LINK_SMART');
                        undef_system_macro('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);
                             DefaultReplacements(utilsprefix);
                             More:='';
                          End;
                    'r' : Begin
                             rlinkpath:=Copy(more,2,length(More)-1);
                             DefaultReplacements(rlinkpath);
                             More:='';
                          end;
                    'S' :
                      begin
                        def_system_macro('FPC_LINK_STATIC');
                        undef_system_macro('FPC_LINK_SMART');
                        undef_system_macro('FPC_LINK_DYNAMIC');
                        include(initglobalswitches,cs_link_static);
                        exclude(initglobalswitches,cs_link_smart);
                        exclude(initglobalswitches,cs_link_shared);
                        LinkTypeSetExplicitly:=true;
                      end;
                    'X' :
                      begin
                        def_system_macro('FPC_LINK_SMART');
                        undef_system_macro('FPC_LINK_STATIC');
                        undef_system_macro('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(1);
      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, tmp,
  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);
{$ifdef USE_SYSUTILS}
  assign(f,ExpandFileName(filename));
{$else USE_SYSUTILS}
  assign(f,FExpand(filename));
{$endif USE_SYsUTILS}
  {$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 (assigned(search_macro(s)) or (s='COMMON'));
            end
           else
            if (s='IFDEF') then
             begin
               RemoveSep(opts);
               if Level>=maxlevel then
                begin
                  Message(option_too_many_ifdef);
                  stopOptions(1);
                end;
               inc(Level);
               skip[level]:=(skip[level-1] or not assigned(search_macro(upper(GetName(opts)))));
             end
           else
            if (s='IFNDEF') then
             begin
               RemoveSep(opts);
               if Level>=maxlevel then
                begin
                  Message(option_too_many_ifdef);
                  stopOptions(1);
                end;
               inc(Level);
               skip[level]:=(skip[level-1] or assigned(search_macro(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(1);
                end;
               dec(level);
             end
           else
            if (not skip[level]) then
             begin
               if (s='DEFINE') then
                begin
                  RemoveSep(opts);
                  tmp:= GetName(opts);
                  if tmp <> '' then
                    def_system_macro(tmp);
                end
              else
               if (s='UNDEF') then
                begin
                  RemoveSep(opts);
                  tmp:= GetName(opts);
                  if tmp <> '' then
                    undef_system_macro(tmp);
                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));
           'P' :
             addinfo(source_cpu_string);
           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(0);
   end;
end;


procedure TOption.TargetDefines(def:boolean);
var
  s : string;
  i : integer;
begin
  if def then
   def_system_macro(target_info.shortname)
  else
   undef_system_macro(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_system_macro(Copy(s,1,i-1))
     else
      undef_system_macro(Copy(s,1,i-1));
     delete(s,1,i);
   end;
end;


constructor TOption.create;
begin
  LogoWritten:=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 }
{$IFDEF USE_SYSUTILS}
  configpath:=FixPath(GetEnvironmentVariable('PPC_CONFIG_PATH'),false);
{$ELSE USE_SYSUTILS}
  configpath:=FixPath(dos.getenv('PPC_CONFIG_PATH'),false);
{$ENDIF USE_SYSUTILS}
{$ifdef Unix}
  if configpath='' then
   configpath:=CleanPath(FixPath(exepath+'../etc/',false));
{$endif}
  {
    Order to read configuration file :
    try reading fpc.cfg in :
     1 - current dir
     2 - configpath
     3 - compiler path
  }
  if not FileExists(fn) then
   begin
{$ifdef Unix}
{$IFDEF USE_SYSUTILS}
     if (GetEnvironmentVariable('HOME')<>'') and CfgFileExists(FixPath(GetEnvironmentVariable('HOME'),false)+'.'+fn) then
      foundfn:=FixPath(GetEnvironmentVariable('HOME'),false)+'.'+fn
{$ELSE USE_SYSUTILS}
     if (dos.getenv('HOME')<>'') and CfgFileExists(FixPath(dos.getenv('HOME'),false)+'.'+fn) then
      foundfn:=FixPath(dos.getenv('HOME'),false)+'.'+fn
{$ENDIF USE_SYSUTILS}
     else
{$endif}
      if CfgFileExists(configpath+fn) then
       foundfn:=configpath+fn
     else
{$ifndef Unix}
      if CfgFileExists(exepath+fn) then
       foundfn:=exepath+fn
     else
{$else}
      if CfgFileExists('/etc/'+fn) then
       foundfn:='/etc/'+fn
     else
{$endif}
      check_configfile:=false;
   end;
end;


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

{ get default messagefile }
{$IFDEF USE_SYSUTILS}
  msgfilename:=GetEnvironmentVariable('PPC_ERROR_FILE');
{$ELSE USE_SYSUTILS}
  msgfilename:=dos.getenv('PPC_ERROR_FILE');
{$ENDIF USE_SYSUTILS}

{ 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;

{ first pass reading of parameters, only -i -v -T etc.}
  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;

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

{ Temporary defines, until things settle down }
{$ifdef powerpc}
  def_system_macro('FPC_MTFSB0_CORRECTED');
{$endif powerpc}
  if pocall_default = pocall_register then
    def_system_macro('REGCALL');

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

{ new processor stuff }
{$ifdef i386}
  def_system_macro('CPUI386');
  def_system_macro('CPU32');
  def_system_macro('FPC_HAS_TYPE_EXTENDED');
  def_system_macro('FPC_HAS_TYPE_DOUBLE');
  def_system_macro('FPC_HAS_TYPE_SINGLE');
{$endif}
{$ifdef m68k}
  def_system_macro('CPU68K');
  def_system_macro('CPUM68K');
  def_system_macro('CPU32');
  def_system_macro('FPC_CURRENCY_IS_INT64');
  def_system_macro('FPC_COMP_IS_INT64');
{$endif}
{$ifdef ALPHA}
  def_system_macro('CPUALPHA');
  def_system_macro('CPU64');
{$endif}
{$ifdef powerpc}
  def_system_macro('CPUPOWERPC');
  def_system_macro('CPUPOWERPC32');
  def_system_macro('CPU32');
  def_system_macro('FPC_HAS_TYPE_DOUBLE');
  def_system_macro('FPC_HAS_TYPE_SINGLE');
  def_system_macro('FPC_INCLUDE_SOFTWARE_INT64_TO_DOUBLE');
  def_system_macro('FPC_CURRENCY_IS_INT64');
  def_system_macro('FPC_COMP_IS_INT64');
{$endif}
{$ifdef iA64}
  def_system_macro('CPUIA64');
  def_system_macro('CPU64');
{$endif}
{$ifdef x86_64}
  def_system_macro('CPUX86_64');
  def_system_macro('CPUAMD64');
  def_system_macro('CPU64');
  { not supported for now, afaik (FK)
   def_system_macro('FPC_HAS_TYPE_FLOAT128'); }

  { win64 doesn't support the legacy fpu }
  if target_info.system<>system_x86_64_win64 then
    def_system_macro('FPC_HAS_TYPE_EXTENDED')
  else
    begin
      def_system_macro('FPC_CURRENCY_IS_INT64');
      def_system_macro('FPC_COMP_IS_INT64');
      undef_system_macro('FPC_HAS_TYPE_EXTENDED');
    end;

  def_system_macro('FPC_HAS_TYPE_DOUBLE');
  def_system_macro('FPC_HAS_TYPE_SINGLE');
{$endif}
{$ifdef sparc}
  def_system_macro('CPUSPARC');
  def_system_macro('CPUSPARC32');
  def_system_macro('CPU32');
  def_system_macro('FPC_HAS_TYPE_DOUBLE');
  def_system_macro('FPC_HAS_TYPE_SINGLE');
  def_system_macro('FPC_INCLUDE_SOFTWARE_INT64_TO_DOUBLE');
  def_system_macro('FPC_CURRENCY_IS_INT64');
  def_system_macro('FPC_COMP_IS_INT64');
  def_system_macro('FPC_REQUIRES_PROPER_ALIGNMENT');
{$endif}
{$ifdef vis}
  def_system_macro('CPUVIS');
  def_system_macro('CPU32');
{$endif}
{$ifdef arm}
  def_system_macro('CPUARM');
  def_system_macro('FPUFPA');
  def_system_macro('CPU32');
  def_system_macro('FPC_HAS_TYPE_DOUBLE');
  def_system_macro('FPC_HAS_TYPE_SINGLE');
  def_system_macro('FPC_INCLUDE_SOFTWARE_INT64_TO_DOUBLE');
  def_system_macro('FPC_CURRENCY_IS_INT64');
  def_system_macro('FPC_COMP_IS_INT64');
  def_system_macro('FPC_REQUIRES_PROPER_ALIGNMENT');
{$endif arm}

  if source_info.system<>target_info.system then
    def_system_macro('FPC_CROSSCOMPILING');

  if source_info.cpu<>target_info.cpu then
    def_system_macro('FPC_CPUCROSSCOMPILING');

  { 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
      { Write help pages if no parameters are passed }
      if (paramcount=0) then
        Option.WriteHelpPages;
      option.read_parameters;
      { Write only quickinfo }
      if option.quickinfo<>'' then
        option.writequickinfo;
    end;

  { Stop if errors in options }
  if ErrorCount>0 then
   StopOptions(1);

  { Write logo }
  if option.ParaLogo then
    option.writelogo;

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

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

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

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

{ Check file to compile }
  if param_file='' then
   begin
     Message(option_no_source_found);
     StopOptions(1);
   end;
{$ifndef Unix}
  param_file:=FixFileName(param_file);
{$endif}
{$IFDEF USE_SYSUTILS}
  inputdir := SplitPath(param_file);
  inputfile := SplitName(param_file);
  inputextension := SplitExtension(param_file);
{$ELSE USE_SYSUTILS}
  fsplit(param_file,inputdir,inputfile,inputextension);
{$ENDIF USE_SYSUTILS}
  if inputextension='' then
   begin
     if FileExists(inputdir+inputfile+sourceext) then
      inputextension:=sourceext
     else if FileExists(inputdir+inputfile+pasext) then
       inputextension:=pasext
     else if ((m_mac in aktmodeswitches) or target_info.p_ext_support)
             and FileExists(inputdir+inputfile+pext) then
       inputextension:=pext;
   end;

  { Check output dir }
  if (OutputExeDir<>'') and
     not PathExists(OutputExeDir) then
    begin
      Message1(general_e_path_does_not_exist,OutputExeDir);
      StopOptions(1);
    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
{$IFDEF USE_SYSUTILS}
     UnitSearchPath.AddPath(GetEnvironmentVariable(target_info.unit_env),false);
{$ELSE USE_SYSUTILS}
     UnitSearchPath.AddPath(dos.getenv(target_info.unit_env),false);
{$ENDIF USE_SYSUTILS}
   end;

{$ifdef Unix}
{$IFDEF USE_SYSUTILS}
  fpcdir:=FixPath(GetEnvironmentVariable('FPCDIR'),false);
{$ELSE USE_SYSUTILS}
  fpcdir:=FixPath(getenv('FPCDIR'),false);
{$ENDIF USE_SYSUTILS}
  if fpcdir='' then
   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;
{$else}
{$IFDEF USE_SYSUTILS}
  fpcdir:=FixPath(GetEnvironmentVariable('FPCDIR'),false);
{$ELSE USE_SYSUTILS}
  fpcdir:=FixPath(getenv('FPCDIR'),false);
{$ENDIF USE_SYSUTILS}
  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 PathExists(FpcDir+'rtl') then
        if tf_use_8_3 in Source_Info.Flags then
          UnitSearchPath.AddPath(FpcDir+'rtl/'+target_os_string,false)
        else
          UnitSearchPath.AddPath(FpcDir+'rtl/'+target_full_string,false)
      else
        if tf_use_8_3 in Source_Info.Flags then
          UnitSearchPath.AddPath(FpcDir+'units/'+target_os_string+'/rtl',false)
        else
          UnitSearchPath.AddPath(FpcDir+'units/'+target_full_string+'/rtl',false);
    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
     (af_outputbinary in target_asm.flags) 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);

{$ifdef x86_64}
  {$warning HACK: turn off smartlinking}
  exclude(initmoduleswitches,cs_create_smart);
{$endif}

  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);

  set_system_macro('FPC_VERSION',version_nr);
  set_system_macro('FPC_RELEASE',release_nr);
  set_system_macro('FPC_PATCH',patch_nr);

  option.free;
  Option:=nil;
end;


initialization
  coption:=toption;
finalization
  if assigned(option) then
   option.free;
end.