freepascal.compiler/compiler/options.pas

{
    $Id$
    Copyright (c) 1998-2000 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;

interface

uses
  globtype,globals,verbose;

type
  POption=^TOption;
  TOption=object
    FirstPass,
    NoPressEnter,
    DoWriteLogo : boolean;
    FileLevel : longint;
    ParaIncludePath,
    ParaUnitPath,
    ParaObjectPath,
    ParaLibraryPath : TSearchPathList;
    Constructor Init;
    Destructor Done;
    procedure WriteLogo;
    procedure WriteInfo;
    procedure WriteHelpPages;
    procedure QuickInfo(const s:string);
    procedure IllegalPara(const opt:string);
    function  Unsetbool(const 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);
  end;

procedure read_arguments(cmd:string);


implementation

uses
{$ifdef Delphi}
  dmisc,
{$else Delphi}
  dos,
{$endif Delphi}
  version,systems,
  cutils,cobjects,
  symtable,scanner,link,messages
{$ifdef BrowserLog}
  ,browlog
{$endif BrowserLog}
{$ifdef i386}
  ,opts386
{$endif}
{$ifdef m68k}
  ,opts68k
{$endif}
  ;

const
  page_size = 24;

var
  option     : poption;
  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,
  msgfilename,
  param_file    : string;   { file to compile specified on the commandline }

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

procedure def_symbol(const s : string);
begin
  if s='' then
   exit;
  initdefines.concat(new(pstring_item,init(upper(s))));
end;


procedure undef_symbol(const s : string);
var
  item,next : pstring_item;
begin
  if s='' then
   exit;
  item:=pstring_item(initdefines.first);
  while assigned(item) do
   begin
     if (item^.str^=s) then
      begin
        next:=pstring_item(item^.next);
        initdefines.remove(item);
        dispose(item,done);
        item:=next;
      end
     else
      if item<>pstring_item(item^.next) then
       item:=pstring_item(item^.next)
      else
       break;
   end;
end;


function check_symbol(const s:string):boolean;
var
  hp : pstring_item;
begin
  hp:=pstring_item(initdefines.first);
  while assigned(hp) do
   begin
     if (hp^.str^=s) then
      begin
        check_symbol:=true;
        exit;
      end;
     hp:=pstring_item(hp^.next);
   end;
  check_symbol:=false;
end;

procedure MaybeLoadMessageFile;
begin
{ Load new message file }
  if (msgfilename<>'')  then
    begin
       if fileexists(msgfilename) then
         LoadMsgFile(msgfilename);
       msgfilename:='';
    end;
end;

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

procedure StopOptions;
begin
  if assigned(Option) then
   begin
     dispose(Option,Done);
     Option:=nil;
   end;
  DoneVerbose;
  Stop;
end;


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


procedure Toption.WriteInfo;
var
  p : pchar;
begin
  MaybeLoadMessageFile;
  p:=MessagePchar(option_info);
  while assigned(p) do
   Comment(V_Normal,GetMsgLine(p));
  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
  MaybeLoadMessageFile;
  Message1(option_usage,paramstr(0));
  lastident:=0;
  if DoWriteLogo then
   lines:=3
  else
   lines:=1;
  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
{$ifdef i386}
      '3',
{$endif}
{$ifdef m68k}
      '6',
{$endif}
      '*' : show:=true;
     end;
     if show then
      begin
        case s[2] of
{$ifdef TP}
         't',
{$endif}
{$ifdef GDB}
         'g',
{$endif}
{$ifdef linux}
         'L',
{$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:=11;
                 outline:=11;
               end;
         '3' : begin
                 ident:=21;
                 outline:=6;
               end;
        end;
        j:=pos('_',s);
        opt:=Copy(s,4,j-4);
        if opt='*' then
         opt:=''
        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) then
         begin
           if not NoPressEnter then
            begin
              write('*** 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.QuickInfo(const s:string);
begin
  if source_os.newline=#13#10 then
    Write(s+#10)
  else
    Writeln(s);
  StopOptions;
end;


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


function Toption.Unsetbool(const 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 := (Length(Opts) > Pos) And (Opts[Succ(Pos)] = '-');
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;
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;

  case opt[1] of
 '-' : begin
         more:=Copy(opt,3,255);
         case opt[2] of
              '!' : initlocalswitches:=initlocalswitches+[cs_ansistrings];
              '?' : WriteHelpPages;
              'a' : begin
                      initglobalswitches:=initglobalswitches+[cs_asm_leave];
                      for j:=1 to length(more) do
                       case more[j] of
                        'l' : initglobalswitches:=initglobalswitches+[cs_asm_source];
                        'r' : initglobalswitches:=initglobalswitches+[cs_asm_regalloc];
                        't' : initglobalswitches:=initglobalswitches+[cs_asm_tempalloc];
                        '-' : initglobalswitches:=initglobalswitches-[cs_asm_leave,cs_asm_source,cs_asm_regalloc];
                       else
                         IllegalPara(opt);
                       end;
                    end;
              'A' : begin
                      if set_string_asm(More) then
                       begin
                         initoutputformat:=target_asm.id;
                         asm_is_set:=true;
                       end
                      else
                       IllegalPara(opt);
                    end;
              'b' : begin
{$ifdef BrowserLog}
                      initglobalswitches:=initglobalswitches+[cs_browser_log];
{$endif}
                      if More<>'' then
                        if More='l' then
                          initmoduleswitches:=initmoduleswitches+[cs_local_browser]
                        else if More='-' then
                          begin
                            initmoduleswitches:=initmoduleswitches-[cs_browser,cs_local_browser];
{$ifdef BrowserLog}
                            initglobalswitches:=initglobalswitches-[cs_browser_log];
{$endif}
                          end
                        else if More<>'+' then
{$ifdef BrowserLog}
                          browserlog.elements_to_list^.insert(more);
{$else}
                          IllegalPara(opt);
{$endif}
                    end;
              'B' : if more='' then
                      do_build:=true
                    else
                      if more = '-' then
                        do_build := False
                      else
                        IllegalPara(opt);
              'C' : begin
                      j := 1;
                      while j <= length(more) Do
                        Begin
                          case more[j] of
                            'a' : Simplify_ppu:=true;
                            'h' :
                               begin
                                 val(copy(more,j+1,length(more)-j),heapsize,code);
                                 if (code<>0) or (heapsize>=67107840) or (heapsize<1024) then
                                  IllegalPara(opt);
                                 break;
                               end;
                            'i' : If UnsetBool(More, j) then
                                    Begin
                                      initlocalswitches:=initlocalswitches-[cs_check_io];
                                      inc(j)
                                    End
                                  else initlocalswitches:=initlocalswitches+[cs_check_io];
                            'n' : If UnsetBool(More, j) then
                                    Begin
                                      initglobalswitches:=initglobalswitches-[cs_link_extern];
                                      inc(j)
                                    End
                                  Else initglobalswitches:=initglobalswitches+[cs_link_extern];
                            'o' :
                              If UnsetBool(More, j) then
                                Begin
                                  initlocalswitches:=initlocalswitches-[cs_check_overflow];
                                  inc(j);
                                End
                              Else
                                initlocalswitches:=initlocalswitches+[cs_check_overflow];
                            'r' :
                              If UnsetBool(More, j) then
                                Begin
                                  initlocalswitches:=initlocalswitches-[cs_check_range];
                                  inc(j);
                                End
                              Else
                                initlocalswitches:=initlocalswitches+[cs_check_range];
                            'R' :
                              If UnsetBool(More, j) then
                                Begin
                                  initlocalswitches:=initlocalswitches-[cs_check_object_ext];
                                  inc(j);
                                End
                              Else
                                initlocalswitches:=initlocalswitches+[cs_check_object_ext];
                            '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
                                 Begin
                                   initlocalswitches:=initlocalswitches-[cs_check_stack];
                                   inc(j)
                                 End
                               Else
                                 initlocalswitches:=initlocalswitches+[cs_check_stack];
                            'D' :
                               If UnsetBool(More, j) then
                                 Begin
                                   initmoduleswitches:=initmoduleswitches-[cs_create_dynamic];
                                   inc(j)
                                 End
                               Else
                                 initmoduleswitches:=initmoduleswitches+[cs_create_dynamic];
                            'X' :
                               If UnsetBool(More, j) then
                                 Begin
                                   initmoduleswitches:=initmoduleswitches-[cs_create_smart];
                                   inc(j)
                                 End
                               Else
                                 initmoduleswitches:=initmoduleswitches+[cs_create_smart];
                            else
                               IllegalPara(opt);
                          end;
                          inc(j);
                        end;
                    end;
              'd' : def_symbol(more);
              'D' : begin
                      initglobalswitches:=initglobalswitches+[cs_link_deffile];
                      for j:=1 to length(more) do
                       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;
                       else
                         IllegalPara(opt);
                       end;
                    end;
              'e' : exepath:=FixPath(More,true);
              { Just used by RHIDE }
              'E' : if (length(more)=0) or (UnsetBool(More, 0)) then
                      initglobalswitches:=initglobalswitches+[cs_link_extern]
                    else
                      initglobalswitches:=initglobalswitches-[cs_link_extern];
              'F' : begin
                      c:=more[1];
                      Delete(more,1,1);
                      case c of
                       'D' : begin
                              if not ispara then
                               DefaultReplacements(More);
                              utilsdirectory:=FixPath(More,true);
                             end;
                       'e' : SetRedirectFile(More);
                       'E' : OutputExeDir:=FixPath(More,true);
                       'i' : if ispara then
                              ParaIncludePath.AddPath(More,false)
                             else
                              includesearchpath.AddPath(More,true);
                       'g' : Message2(option_obsolete_switch_use_new,'-Fg','-Fl');
                       'l' : if ispara then
                              ParaLibraryPath.AddPath(More,false)
                             else
                              LibrarySearchPath.AddPath(More,true);
                       'L' : if More<>'' then
                              ParaDynamicLinker:=More
                             else
                              IllegalPara(opt);
                       'o' : if ispara then
                              ParaObjectPath.AddPath(More,false)
                             else
                              ObjectSearchPath.AddPath(More,true);
                       'r' : Msgfilename:=More;
                       'u' : if ispara then
                              ParaUnitPath.AddPath(More,false)
                             else
                              unitsearchpath.AddPath(More,true);
                       'U' : OutputUnitDir:=FixPath(More,true);
                      else
                        IllegalPara(opt);
                      end;
                    end;
              'g' : begin
                      if UnsetBool(More, 0) then
                        begin
                          initmoduleswitches:=initmoduleswitches-[cs_debuginfo];
                          if (length(More)>1) and (More[2]='l') then
                            initglobalswitches:=initglobalswitches+[cs_gdb_lineinfo];
                        end
                      else
                       begin
{$ifdef GDB}
                         initmoduleswitches:=initmoduleswitches+[cs_debuginfo];
                         if not RelocSectionSetExplicitly then
                           RelocSection:=false;
                         for j:=1 to length(more) do
                          case more[j] of
                           'd' : initglobalswitches:=initglobalswitches+[cs_gdb_dbx];
                           'g' : initglobalswitches:=initglobalswitches+[cs_gdb_gsym];
                           'h' : initglobalswitches:=initglobalswitches+[cs_gdb_heaptrc];
                           'l' : initglobalswitches:=initglobalswitches+[cs_gdb_lineinfo];
                           'c' : initglobalswitches:=initglobalswitches+[cs_checkpointer];
{$ifdef EXTDEBUG}
                           'p' : only_one_pass:=true;
{$endif EXTDEBUG}
                          else
                            IllegalPara(opt);
                          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' : if more='' then
                     WriteInfo
                    else
                     begin
                        { Specific info, which can be used in Makefiles }
                        case More[1] of
                          'S' : begin
                                  case More[2] of
                                   'O' : QuickInfo(source_os.shortname);
{$ifdef Delphi !!!!!!!!!}
                                   'P' : QuickInfo('unknown');
{$else}
                                   'P' : QuickInfo(source_cpu_string);
{$endif}
                                  end;
                                end;
                          'T' : begin
                                  case More[2] of
                                   'O' : QuickInfo(target_os.shortname);
                                   'P' : QuickInfo(target_cpu_string);
                                  end;
                                end;
                          'V' : QuickInfo(version_string);
                          'D' : QuickInfo(date_string);
                        else
                          IllegalPara(Opt);
                        end;
                     end;
              'I' : if ispara then
                     ParaIncludePath.AddPath(More,false)
                    else
                     includesearchpath.AddPath(More,false);
              'k' : if more<>'' then
                     ParaLinkOptions:=ParaLinkOptions+' '+More
                    else
                     IllegalPara(opt);
              'l' : if more='' then
                      DoWriteLogo:=true
                    else
                      IllegalPara(opt);
              'm' : parapreprocess:=true;
              'n' : if More='' then
                     begin
                       read_configfile:=false;
                       disable_configfile:=true;
                     end
                    else
                     IllegalPara(opt);
              'o' : if More<>'' then
                     Fsplit(More,d,OutputFile,e)
                    else
                     IllegalPara(opt);
              'p' : begin
                      if UnsetBool(More, 0) then
                        begin
                          initmoduleswitches:=initmoduleswitches-[cs_profile];
                          undef_symbol('FPC_PROFILE');
                        end
                      else
                        case more[1] of
                         'g' : if (length(opt)=3) and UnsetBool(more, 1) then
                                begin
                                  initmoduleswitches:=initmoduleswitches-[cs_profile];
                                  undef_symbol('FPC_PROFILE');
                                end
                               else
                                begin
                                  initmoduleswitches:=initmoduleswitches+[cs_profile];
                                  def_symbol('FPC_PROFILE');
                               end;
                        else
                          IllegalPara(opt);
                        end;
                    end;
{$ifdef linux}
              'P' : initglobalswitches:=initglobalswitches+[cs_asm_pipe];
{$endif}
              's' : initglobalswitches:=initglobalswitches+[cs_asm_extern,cs_link_extern];
              'S' : begin
                      for j:=1 to length(more) do
                       case more[j] of
                        '2' : initmodeswitches:=objfpcmodeswitches;
                        'a' : initlocalswitches:=InitLocalswitches+[cs_do_assertion];
                        'c' : initmoduleswitches:=initmoduleswitches+[cs_support_c_operators];
                        'd' : initmodeswitches:=delphimodeswitches;
                        'e' : begin
                                SetErrorFlags(more);
                                break;
                              end;
                        'g' : initmoduleswitches:=initmoduleswitches+[cs_support_goto];
                        'h' : initlocalswitches:=initlocalswitches+[cs_ansistrings];
                        'i' : initmoduleswitches:=initmoduleswitches+[cs_support_inline];
                        'm' : initmoduleswitches:=initmoduleswitches+[cs_support_macro];
                        'o':  initmodeswitches:=tpmodeswitches;
                        'p' : initmodeswitches:=gpcmodeswitches;
                        's' : initglobalswitches:=initglobalswitches+[cs_constructor_name];
                        't' : initmoduleswitches:=initmoduleswitches+[cs_static_keyword];
                        'v' : Message1(option_obsolete_switch,'-Sv');
                       else
                        IllegalPara(opt);
                       end;
                    end;
              'T' : begin
                      more:=Upper(More);
                      if not target_is_set then
                       begin
                       { remove old target define }
                         undef_symbol(target_info.short_name);
                       { load new target }
                         if not(set_string_target(More)) then
                           IllegalPara(opt);
                       { set new define }
                         def_symbol(target_info.short_name);
                         if not asm_is_set then
                           initoutputformat:=target_asm.id;
                         target_is_set:=true;
                       end
                      else
                       if More<>target_info.short_name then
                        Message1(option_target_is_already_set,target_info.short_name);
                    end;
              'u' : undef_symbol(upper(More));
              'U' : begin
                      for j:=1 to length(more) do
                       case more[j] of
{$ifdef UNITALIASES}
                        'a' : begin
                                AddUnitAlias(Copy(More,j+1,255));
                                break;
                              end;
{$endif UNITALIASES}
                        'n' : initglobalswitches:=initglobalswitches-[cs_check_unit_name];
                        'p' : begin
                                Message2(option_obsolete_switch_use_new,'-Up','-Fu');
                                break;
                              end;
                        's' : initmoduleswitches:=initmoduleswitches+[cs_compilesystem];
                       else
                         IllegalPara(opt);
                       end;
                    end;
              'v' : if not setverbosity(More) then
                     IllegalPara(opt);
              'W' : begin
                      for j:=1 to length(More) do
                       case More[j] of
                        'B': {bind_win32_dll:=true}
                             begin
                               {  -WB200000 means set prefered 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': apptype:=at_cui;
                        'D': ForceDeffileForExport:=true;
                        'G': apptype:=at_gui;
                        'N': begin
                               RelocSection:=false;
                               RelocSectionSetExplicitly:=true;
                             end;

                        'R': begin
                               RelocSection:=true;
                               RelocSectionSetExplicitly:=true;
                             end;
                       else
                        IllegalPara(opt);
                       end;
                    end;
              'X' : begin
                      for j:=1 to length(More) do
                       case More[j] of
                        'c' : initglobalswitches:=initglobalswitches+[cs_link_toc];
                        's' : initglobalswitches:=initglobalswitches+[cs_link_strip];
                        't' : initglobalswitches:=initglobalswitches+[cs_link_staticflag];
                        'D' : begin
                                def_symbol('FPC_LINK_DYNAMIC');
                                undef_symbol('FPC_LINK_SMART');
                                undef_symbol('FPC_LINK_STATIC');
                                initglobalswitches:=initglobalswitches+[cs_link_shared];
                                initglobalswitches:=initglobalswitches-[cs_link_static,cs_link_smart];
                                LinkTypeSetExplicitly:=true;
                              end;
                        'S' : begin
                                def_symbol('FPC_LINK_STATIC');
                                undef_symbol('FPC_LINK_SMART');
                                undef_symbol('FPC_LINK_DYNAMIC');
                                initglobalswitches:=initglobalswitches+[cs_link_static];
                                initglobalswitches:=initglobalswitches-[cs_link_shared,cs_link_smart];
                                LinkTypeSetExplicitly:=true;
                              end;
                        'X' : 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];
                                LinkTypeSetExplicitly:=true;
                              end;
                       else
                         IllegalPara(opt);
                       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;
   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 }
  assign(f,filename);
{$ifdef extdebug}
  Comment(V_Info,'trying to open file: '+filename);
{$endif extdebug}
  {$I-}
  reset(f);
  {$I+}
  if ioresult<>0 then
   begin
     Message1(option_unable_open_file,filename);
     exit;
   end;
  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
           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]='-') 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);
  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
  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:=paramstr(paramindex);
     case opts[1] of
       '@' :
         begin
           Delete(opts,1,1);
           if not firstpass then
            Message1(option_reading_further_from,opts);
           interpret_file(opts);
         end;
       '!' :
         begin
           Delete(opts,1,1);
           if not firstpass then
            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
       '@' :
         begin
           Delete(opts,1,1);
           if not firstpass then
            Message1(option_reading_further_from,opts);
           interpret_file(opts);
         end;
       '!' :
         begin
           Delete(opts,1,1);
           if not firstpass then
            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;


constructor TOption.Init;
begin
  DoWriteLogo:=false;
  NoPressEnter:=false;
  FirstPass:=false;
  FileLevel:=0;
  ParaIncludePath.Init;
  ParaObjectPath.Init;
  ParaUnitPath.Init;
  ParaLibraryPath.Init;
end;


destructor TOption.Done;
begin
  ParaIncludePath.Done;
  ParaObjectPath.Done;
  ParaUnitPath.Done;
  ParaLibraryPath.Done;
end;


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

procedure read_arguments(cmd:string);
var
  configpath : pathstr;
begin
{$ifdef Delphi}
  option:=new(poption386,Init);
{$endif Delphi}
{$ifdef i386}
  option:=new(poption386,Init);
{$endif}
{$ifdef m68k}
  option:=new(poption68k,Init);
{$endif}
{$ifdef alpha}
  option:=new(poption,Init);
{$endif}
{$ifdef powerpc}
  option:=new(poption,Init);
{$endif}
{ Load messages }
  if (cmd='') and (paramcount=0) then
   Option^.WriteHelpPages;

  disable_configfile:=false;
{ default defines }
  def_symbol(target_info.short_name);
  def_symbol('FPC');
  def_symbol('VER'+version_nr);
  def_symbol('VER'+version_nr+'_'+release_nr);
  def_symbol('VER'+version_nr+'_'+release_nr+'_'+patch_nr);
{$ifdef newcg}
  def_symbol('WITHNEWCG');
{$endif}


{ Hack: Linux define is also needed for freebsd (MvdV) }
if target_info.target=target_i386_freebsd then
  begin
   def_symbol('LINUX');
   def_symbol('BSD');
   def_symbol('FREEBSD');
  end;


{ Temporary defines, until things settle down }
  def_symbol('HASWIDECHAR');

{$ifdef SUPPORT_FIXED}
  def_symbol('HASFIXED');
{$endif SUPPORT_FIXED}
{$ifdef cardinalmulfix}
{ for the compiler }
  def_symbol('CARDINALMULFIX');
{ for the RTL }
  def_symbol('CARDINALMULFIXED');
{$endif cardinalmulfix}
  def_symbol('PACKENUMFIXED');

{ New since 1.09 }
  def_symbol('HASOUT');

{ some stuff for TP compatibility }
{$ifdef i386}
  def_symbol('CPU86');
  def_symbol('CPU87');
{$endif}
{$ifdef m68k}
  def_symbol('CPU68');
{$endif}

{ new processor stuff }
{$ifdef i386}
  def_symbol('CPUI386');
{$endif}
{$ifdef m68k}
  def_symbol('CPU68K');
{$endif}
{$ifdef ALPHA}
  def_symbol('CPUALPHA');
{$endif}
{$ifdef powerpc}
  def_symbol('CPUPOWERPC');
{$endif}

{ get default messagefile }
{$ifdef Delphi}
  msgfilename:=dmisc.getenv('PPC_ERROR_FILE');
{$else Delphi}
  msgfilename:=dos.getenv('PPC_ERROR_FILE');
{$endif Delphi}
{ default configfile }
  if (cmd<>'') and (cmd[1]='[') then
   begin
     ppccfg:=Copy(cmd,2,pos(']',cmd)-2);
     Delete(cmd,1,pos(']',cmd));
   end
  else
   begin
{$ifdef i386}
     ppccfg:='ppc386.cfg';
{$endif i386}
{$ifdef m68k}
     ppccfg:='ppc.cfg';
{$endif}
{$ifdef alpha}
     ppccfg:='ppcalpha.cfg';
{$endif}
{$ifdef powerpc}
     ppccfg:='ppcppc.cfg';
{$endif}
   end;

{ Order to read ppc386.cfg:
   1 - current dir
   2 - configpath
   3 - compiler path }
{$ifdef Delphi}
  configpath:=FixPath(dmisc.getenv('PPC_CONFIG_PATH'),false);
{$else Delphi}
  configpath:=FixPath(dos.getenv('PPC_CONFIG_PATH'),false);
{$endif Delphi}
{$ifdef linux}
  if configpath='' then
   configpath:='/etc/';
{$endif}
  if ppccfg<>'' then
   begin
     read_configfile:=true;
     if not FileExists(ppccfg) then
      begin
{$ifdef linux}
        if (dos.getenv('HOME')<>'') and FileExists(FixPath(dos.getenv('HOME'),false)+'.'+ppccfg) then
         ppccfg:=FixPath(dos.getenv('HOME'),false)+'.'+ppccfg
        else
{$endif}
         if FileExists(configpath+ppccfg) then
          ppccfg:=configpath+ppccfg
        else
{$ifndef linux}
         if FileExists(exepath+ppccfg) then
          ppccfg:=exepath+ppccfg
        else
{$endif}
         read_configfile:=false;
      end;
   end
  else
   read_configfile:=false;

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

  param_file:='';

  if read_configfile then
   begin
   { read the parameters quick, only -v -T }
     option^.firstpass:=true;
     if cmd<>'' then
       option^.parsecmd(cmd)
     else
       option^.read_parameters;
     option^.firstpass:=false;
     if read_configfile then
      begin
{$ifdef DEBUG}
        Comment(V_Debug,'read config file: '+ppccfg);
{$endif DEBUG}
        option^.interpret_file(ppccfg);
      end;
   end;
  if cmd<>'' then
    option^.parsecmd(cmd)
  else
    option^.read_parameters;

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

{ 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;
{$ifndef linux}
  param_file:=FixFileName(param_file);
{$endif}
  fsplit(param_file,inputdir,inputfile,inputextension);
  if inputextension='' then
   begin
     if FileExists(inputdir+inputfile+target_os.sourceext) then
      inputextension:=target_os.sourceext
     else
      if FileExists(inputdir+inputfile+target_os.pasext) then
       inputextension:=target_os.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
{$ifdef Delphi}
  UnitSearchPath.AddPath(dmisc.getenv(target_info.unit_env),false);
{$else}
  UnitSearchPath.AddPath(dos.getenv(target_info.unit_env),false);
{$endif Delphi}
{$ifdef linux}
  fpcdir:=FixPath(getenv('FPCDIR'),false);
  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;
{$else}
  fpcdir:=FixPath(getenv('FPCDIR'),false);
  if fpcdir='' then
   begin
     fpcdir:=ExePath+'../';
     if not(PathExists(fpcdir+'/units')) and
        not(PathExists(fpcdir+'/rtl')) then
      fpcdir:=fpcdir+'../';
   end;
{$endif}
  { first try development RTL, else use the default installation path }
  if not disable_configfile then
    begin
      if PathExists(FpcDir+'rtl/'+lower(target_info.short_name)) then
       UnitSearchPath.AddPath(FpcDir+'rtl/'+lower(target_info.short_name),false)
      else
       begin
         UnitSearchPath.AddPath(FpcDir+'units/'+lower(target_info.short_name),false);
         UnitSearchPath.AddPath(FpcDir+'units/'+lower(target_info.short_name)+'/rtl',false);
       end;
    end;
  { Add exepath if the exe is not in the current dir, because that is always searched already }
  if ExePath<>GetCurrentDir 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.id in binassem) then
   begin
     Message(option_switch_bin_to_src_assembler);
     set_target_asm(target_info.assemsrc);
     initoutputformat:=target_asm.id;
   end;

  if (target_asm.supported_target <> target_any) and
     (target_asm.supported_target <> target_info.target) then
   begin
     Message2(option_incompatible_asm,target_asm.idtxt,target_os.name);
     { Should we reset to default ??? }
     set_target_asm(target_info.assemsrc);
     Message1(option_asm_forced,target_asm.idtxt);
     initoutputformat:=target_asm.id;
   end;

{ turn off stripping if compiling with debuginfo or profile }
  if (cs_debuginfo in initmoduleswitches) or
     (cs_profile in initmoduleswitches) then
    initglobalswitches:=initglobalswitches-[cs_link_strip];

  if not LinkTypeSetExplicitly then
    begin
      if (target_os.id=os_i386_win32) 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;
{ Set defines depending on the target }
  if (target_info.target in [target_i386_GO32V1,target_i386_GO32V2]) then
   def_symbol('DPMI'); { MSDOS is not defined in BP when target is DPMI }

  MaybeLoadMessageFile;

  dispose(option,Done);
  Option:=nil;
end;


end.
{
  $Log$
  Revision 1.7  2000-09-16 12:22:52  peter
    * freebsd support merged

  Revision 1.6  2000/08/27 16:11:51  peter
    * moved some util functions from globals,cobjects to cutils
    * splitted files into finput,fmodule

  Revision 1.5  2000/08/07 11:31:04  jonas
    * fixed bug in type conversions between enum subranges (it didn't take
      the packenum directive into account)
    + define PACKENUMFIXED symbol in options.pas
     (merged from fixes branch)

  Revision 1.4  2000/07/14 05:11:48  michael
  + Patch to 1.1

  Revision 1.3  2000/07/13 12:08:26  michael
  + patched to 1.1.0 with former 1.09patch from peter

  Revision 1.2  2000/07/13 11:32:44  michael
  + removed logs

}