fpc/compiler/options.pas

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

    Reads command line options and config files

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

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

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

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

{$i fpcdefs.inc}

interface

uses
  globtype,globals,verbose,systems;

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

  TOptionClass=class of toption;

var
  coption : TOptionClass;

procedure read_arguments(cmd:string);


implementation

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

const
  page_size = 24;

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

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

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


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


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


procedure set_default_link_type;
begin
  if (target_info.target in [target_i386_win32,target_i386_wdosx]) then
    begin
      def_symbol('FPC_LINK_SMART');
      undef_symbol('FPC_LINK_STATIC');
      undef_symbol('FPC_LINK_DYNAMIC');
      initglobalswitches:=initglobalswitches+[cs_link_smart];
      initglobalswitches:=initglobalswitches-[cs_link_shared,cs_link_static];
    end
  else
    begin
      undef_symbol('FPC_LINK_SMART');
      def_symbol('FPC_LINK_STATIC');
      undef_symbol('FPC_LINK_DYNAMIC');
      initglobalswitches:=initglobalswitches+[cs_link_static];
      initglobalswitches:=initglobalswitches-[cs_link_shared,cs_link_smart];
    end;
end;



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

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


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


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


procedure Toption.WriteHelpPages;

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

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


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


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


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


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

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

  Message1(option_handling_option,opt);
  case opt[1] of
 '-' : begin
         more:=Copy(opt,3,255);
         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' : include(initglobalswitches,cs_asm_source);
                        'r' : include(initglobalswitches,cs_asm_regalloc);
                        't' : include(initglobalswitches,cs_asm_tempalloc);
                        'n' : include(initglobalswitches,cs_asm_nodes);
                        '-' : initglobalswitches:=initglobalswitches -
                                [cs_asm_leave, cs_asm_source,cs_asm_regalloc, cs_asm_tempalloc];
                       else
                         IllegalPara(opt);
                       end;
                    end;
              'A' : begin
                      if set_target_asm_by_string(More) then
                       asm_is_set:=true
                      else
                       IllegalPara(opt);
                    end;
              'b' : begin
                      if UnsetBool(More,0) then
                       begin
                         exclude(initmoduleswitches,cs_browser);
                         exclude(initmoduleswitches,cs_local_browser);
{$ifdef BrowserLog}
                         exclude(initglobalswitches,cs_browser_log);
{$endif}
                       end
                      else
                       begin
                         include(initmoduleswitches,cs_browser);
{$ifdef BrowserLog}
                         include(initglobalswitches,cs_browser_log);
{$endif}
                       end;
                      if More<>'' then
                        if (More='l') or (More='l+') then
                          include(initmoduleswitches,cs_local_browser)
                        else
                         if More='l-' then
                          exclude(initmoduleswitches,cs_local_browser)
                        else
{$ifdef BrowserLog}
                          browserlog.elements_to_list.insert(more);
{$else}
                          IllegalPara(opt);
{$endif}
                    end;
              'B' : do_build:=not UnSetBool(more,0);
              'C' : begin
                      j := 1;
                      while j <= length(more) Do
                        Begin
                          case more[j] of
                            'a' : Message2(option_obsolete_switch_use_new,'-Ca','-Or');
                            'c' :
                               begin
                                 if not SetAktProcCall(upper(copy(more,j+1,length(more)-j)),true) then
                                  IllegalPara(opt);
                                 break;
                               end;
                            '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
                                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);
                            'r' :
                              If UnsetBool(More, j) then
                                exclude(initlocalswitches,cs_check_range)
                              Else
                                include(initlocalswitches,cs_check_range);
                            'R' :
                              If UnsetBool(More, j) then
                                begin
                                  exclude(initlocalswitches,cs_check_range);
                                  exclude(initlocalswitches,cs_check_object);
                                end
                              Else
                                begin
                                  include(initlocalswitches,cs_check_range);
                                  include(initlocalswitches,cs_check_object);
                                end;
                            's' :
                              begin
                                 val(copy(more,j+1,length(more)-j),stacksize,code);
                                 if (code<>0) or (stacksize>=67107840) or (stacksize<1024) then
                                  IllegalPara(opt);
                                 break;
                              end;
                            't' :
                               If UnsetBool(More, j) then
                                 exclude(initlocalswitches,cs_check_stack)
                               Else
                                 include(initlocalswitches,cs_check_stack);
                            'D' :
                               If UnsetBool(More, j) then
                                 exclude(initmoduleswitches,cs_create_dynamic)
                               Else
                                 include(initmoduleswitches,cs_create_dynamic);
                            'X' :
                               If UnsetBool(More, j) then
                                 exclude(initmoduleswitches,cs_create_smart)
                               Else
                                 include(initmoduleswitches,cs_create_smart);
                            else
                               IllegalPara(opt);
                          end;
                          inc(j);
                        end;
                    end;
              'd' : def_symbol(more);
              'D' : begin
                      include(initglobalswitches,cs_link_deffile);
                      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;
                        '-' : begin
                                exclude(initglobalswitches,cs_link_deffile);
                                usewindowapi:=false;
                              end;
                       else
                         IllegalPara(opt);
                       end;
                    end;
              'e' : exepath:=FixPath(More,true);
              { Just used by RHIDE }
              'E' : if UnsetBool(More, 0) then
                      exclude(initglobalswitches,cs_link_extern)
                    else
                      include(initglobalswitches,cs_link_extern);
              'F' : begin
                      c:=more[1];
                      Delete(more,1,1);
                      DefaultReplacements(More);
                      case c of
                       'D' : utilsdirectory:=FixPath(More,true);
                       '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
                          exclude(initmoduleswitches,cs_debuginfo);
                          exclude(initglobalswitches,cs_gdb_dbx);
                          exclude(initglobalswitches,cs_gdb_gsym);
                          exclude(initglobalswitches,cs_gdb_heaptrc);
                          exclude(initglobalswitches,cs_gdb_lineinfo);
                          exclude(initglobalswitches,cs_checkpointer);
                        end
                      else
                       begin
{$ifdef GDB}
                         include(initmoduleswitches,cs_debuginfo);
                         if not RelocSectionSetExplicitly then
                           RelocSection:=false;
                         for j:=1 to length(more) do
                          case more[j] of
                           'd' : if UnsetBool(More, j) then
                                   exclude(initglobalswitches,cs_gdb_dbx)
                                 else
                                   include(initglobalswitches,cs_gdb_dbx);
                           'g' : if UnsetBool(More, j) then
                                   exclude(initglobalswitches,cs_gdb_gsym)
                                 else
                                   include(initglobalswitches,cs_gdb_gsym);
                           'h' : if UnsetBool(More, j) then
                                   exclude(initglobalswitches,cs_gdb_heaptrc)
                                 else
                                   include(initglobalswitches,cs_gdb_heaptrc);
                           'l' : if UnsetBool(More, j) then
                                   exclude(initglobalswitches,cs_gdb_lineinfo)
                                 else
                                   include(initglobalswitches,cs_gdb_lineinfo);
                           'c' : if UnsetBool(More, j) then
                                   exclude(initglobalswitches,cs_checkpointer)
                                 else
                                   include(initglobalswitches,cs_checkpointer);
                          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
                     QuickInfo:=QuickInfo+More;
              'I' : if ispara then
                     ParaIncludePath.AddPath(More,false)
                    else
                     includesearchpath.AddPath(More,false);
              'k' : if more<>'' then
                     ParaLinkOptions:=ParaLinkOptions+' '+More
                    else
                     IllegalPara(opt);
              'l' : DoWriteLogo:=not UnSetBool(more,0);
              'm' : parapreprocess:=not UnSetBool(more,0);
              '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
                        if Length(More)=0 then
                          IllegalPara(opt)
                        else
                        case more[1] of
                         'g' : if UnsetBool(more, 1) then
                                begin
                                  exclude(initmoduleswitches,cs_profile);
                                  undef_symbol('FPC_PROFILE');
                                end
                               else
                                begin
                                  include(initmoduleswitches,cs_profile);
                                  def_symbol('FPC_PROFILE');
                               end;
                        else
                          IllegalPara(opt);
                        end;
                    end;
{$ifdef Unix}
              'P' : if UnsetBool(More, 0) then
                      exclude(initglobalswitches,cs_asm_pipe)
                    else
                      include(initglobalswitches,cs_asm_pipe);
{$endif Unix}
              's' :
                    begin
                      if UnsetBool(More, 0) then
                        begin
                          initglobalswitches:=initglobalswitches-[cs_asm_extern,cs_link_extern];
                          if more<>'' then
                            IllegalPara(opt);
                        end
                      else
                        begin
                          initglobalswitches:=initglobalswitches+[cs_asm_extern,cs_link_extern];
                          if more='h' then
                            initglobalswitches:=initglobalswitches-[cs_link_on_target]
                          else if more='t' then
                            initglobalswitches:=initglobalswitches+[cs_link_on_target]
                          else if more<>'' 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
                        for j:=1 to length(more) do
                         case more[j] of
                          '2' : SetCompileMode('OBJFPC',true);
                          'a' : include(initlocalswitches,cs_do_assertion);
                          'c' : include(initmoduleswitches,cs_support_c_operators);
                          'd' : 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' : SetCompileMode('TP',true);
                          'p' : 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;
                    end;
              'T' : begin
                      more:=Upper(More);
                      if not target_is_set then
                       begin
                         { remove old target define }
                         TargetDefines(false);
                         { Save assembler if set }
                         if asm_is_set then
                          forceasm:=target_asm.id;
                         { load new target }
                         if not(set_target_by_string(More)) then
                           IllegalPara(opt);
                         { also initialize assembler if not explicitly set }
                         if asm_is_set then
                          set_target_asm(forceasm);
                         { set new define }
                         TargetDefines(true);
                         target_is_set:=true;
                       end
                      else
                       if More<>upper(target_info.shortname) then
                        Message1(option_target_is_already_set,target_info.shortname);
                    end;
              'u' : undef_symbol(upper(More));
              'U' : begin
                      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' : 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;
                    end;
              'v' : if not setverbosity(More) then
                     IllegalPara(opt);
              'W' : begin
                      j:=0;
                      while j<length(More) do
                      begin
                       inc(j);
                       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': if UnsetBool(More, j) then
                               apptype:=app_gui
                              else
                               apptype:=app_cui;
                        'D': ForceDeffileForExport:=not UnsetBool(More, j);
                        'F': apptype:=app_fs;
                        'G': if UnsetBool(More, j) then
                               apptype:=app_cui
                              else
                               apptype:=app_gui;
                        'N': begin
                               RelocSection:=UnsetBool(More,j);
                               RelocSectionSetExplicitly:=true;
                             end;
                        'R': begin
                               { support -WR+ / -WR- as synonims to -WR / -WN }
                               RelocSection:=not UnsetBool(More,j);
                               RelocSectionSetExplicitly:=true;
                             end;
                       else
                        IllegalPara(opt);
                       end;
                       end; {of while}
                    end;
              'X' : begin
                      for j:=1 to length(More) do
                       case More[j] of
                        's' : include(initglobalswitches,cs_link_strip);
                        't' : include(initglobalswitches,cs_link_staticflag);
                        'D' : begin
                                def_symbol('FPC_LINK_DYNAMIC');
                                undef_symbol('FPC_LINK_SMART');
                                undef_symbol('FPC_LINK_STATIC');
                                exclude(initglobalswitches,cs_link_static);
                                exclude(initglobalswitches,cs_link_smart);
                                include(initglobalswitches,cs_link_shared);
                                LinkTypeSetExplicitly:=true;
                              end;
                        'S' : begin
                                def_symbol('FPC_LINK_STATIC');
                                undef_symbol('FPC_LINK_SMART');
                                undef_symbol('FPC_LINK_DYNAMIC');
                                include(initglobalswitches,cs_link_static);
                                exclude(initglobalswitches,cs_link_smart);
                                exclude(initglobalswitches,cs_link_shared);
                                LinkTypeSetExplicitly:=true;
                              end;
                        'X' : begin
                                def_symbol('FPC_LINK_SMART');
                                undef_symbol('FPC_LINK_STATIC');
                                undef_symbol('FPC_LINK_DYNAMIC');
                                exclude(initglobalswitches,cs_link_static);
                                include(initglobalswitches,cs_link_smart);
                                exclude(initglobalswitches,cs_link_shared);
                                LinkTypeSetExplicitly:=true;
                              end;
                        '-' : begin
                                exclude(initglobalswitches,cs_link_staticflag);
                                exclude(initglobalswitches,cs_link_strip);
                                set_default_link_type;
                              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 }
  Message1(option_using_file,filename);
  assign(f,filename);
  {$I-}
  reset(f);
  {$I+}
  if ioresult<>0 then
   begin
     Message1(option_unable_open_file,filename);
     exit;
   end;
  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]='-') 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);
  Close(f);
  Dec(FileLevel);
end;


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


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


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


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

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

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


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


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


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


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

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

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

{ Temporary defines, until things settle down }
  def_symbol('HASWIDECHAR');
  def_symbol('HASWIDESTRING');
  def_symbol('HASOUT');
  def_symbol('HASINTF');
  def_symbol('HASVARIANT');
  def_symbol('INTERNSETLENGTH');
  def_symbol('INTERNLENGTH');
  def_symbol('INT64FUNCRESOK');
  def_symbol('HAS_ADDR_STACK_ON_STACK');
  def_symbol('NOBOUNDCHECK');
  def_symbol('HASCOMPILERPROC');
  def_symbol('VALUEGETMEM');
  def_symbol('VALUEFREEMEM');
  def_symbol('HASCURRENCY');

  { some stuff for TP compatibility }
  case target_info.cpu of
   cpu_i386:
        begin
         def_symbol('CPU86');
         def_symbol('CPU87');
         def_symbol('CPUI386');
        end;
   cpu_m68k:
        begin
          def_symbol('CPU68');
          def_symbol('CPU68K');
        end;
   cpu_alpha:
        begin
          def_symbol('CPUALPHA');
        end;
   cpu_powerpc:
        begin
          def_symbol('CPUPOWERPC');
        end;
   cpu_sparc:
        begin
          def_symbol('CPUSPARC');
        end;
   cpu_vm:
        begin
          def_symbol('CPUVIS');
        end;
   else
        internalerror(1295969);
  end;


{ 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
     ppcaltcfg:='ppc386.cfg';
     ppccfg:='fpc.cfg';
   end;

{ Order to read configuration file :
  try reading ppc386.cfg in :
   1 - current dir
   2 - configpath
   3 - compiler path
  else try reading fpc.cfg in :
   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 Unix}
  if configpath='' then
   configpath:='/etc/';
{$endif}
  if ppccfg<>'' then
   begin
     read_configfile:=true;
     if not FileExists(ppcaltcfg) then
      begin
{$ifdef Unix}
        if (dos.getenv('HOME')<>'') and FileExists(FixPath(dos.getenv('HOME'),false)+'.'+ppcaltcfg) then
         ppccfg:=FixPath(dos.getenv('HOME'),false)+'.'+ppcaltcfg
        else
{$endif}
         if FileExists(configpath+ppcaltcfg) then
          ppccfg:=configpath+ppcaltcfg
        else
{$ifndef Unix}
         if FileExists(exepath+ppcaltcfg) then
          ppccfg:=exepath+ppcaltcfg
        else
{$endif}
         read_configfile:=false;
      end
     else
        ppccfg := ppcaltcfg;  { file is found, then set it to ppccfg }


     if not read_configfile then
      begin
        read_configfile := true;
        if not FileExists(ppccfg) then
         begin
    {$ifdef Unix}
            if (dos.getenv('HOME')<>'') and FileExists(FixPath(dos.getenv('HOME'),false)+'.'+ppccfg) then
             ppccfg:=FixPath(dos.getenv('HOME'),false)+'.'+ppccfg
            else
    {$endif}
             if FileExists(configpath+ppccfg) then
              ppccfg:=configpath+ppccfg
            else
    {$ifndef Unix}
             if FileExists(exepath+ppccfg) then
              ppccfg:=exepath+ppccfg
            else
    {$endif}
             read_configfile:=false;
         end;
      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 -i -v -T }
     option.firstpass:=true;
     if cmd<>'' then
       option.parsecmd(cmd)
     else
      begin
        option.read_parameters;
        { Write only quickinfo }
        if option.quickinfo<>'' then
         option.writequickinfo;
      end;
   { Read the configfile }
     option.firstpass:=false;
     if read_configfile then
      option.interpret_file(ppccfg);
   end;
  if cmd<>'' then
    option.parsecmd(cmd)
  else
    begin
      option.read_parameters;
      { Write only quickinfo }
      if option.quickinfo<>'' then
       option.writequickinfo;
    end;

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

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

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

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

{$ifdef m68k}
  { Disable fpu emulation for linux and netbsd on m68k machines }
  { FIXME: this overrides possible explicit command line emulation setting,
    but this isn't supported yet anyhow PM }
  if (target_info.target in [target_m68k_netbsd,target_m68k_linux]) then
   exclude(initmoduleswitches,cs_fp_emulation)
  else
   def_symbol('M68K_FPU_EMULATED');
{$endif m68k}

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

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

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

{ add unit environment and exepath to the unit search path }
  if inputdir<>'' then
   Unitsearchpath.AddPath(inputdir,true);
  if not disable_configfile then
{$ifdef Delphi}
  UnitSearchPath.AddPath(dmisc.getenv(target_info.unit_env),false);
{$else}
  UnitSearchPath.AddPath(dos.getenv(target_info.unit_env),false);
{$endif Delphi}
{$ifdef Unix}
  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.shortname)) then
       UnitSearchPath.AddPath(FpcDir+'rtl/'+lower(target_info.shortname),false)
      else
       begin
         UnitSearchPath.AddPath(FpcDir+'units/'+lower(target_info.shortname),false);
         UnitSearchPath.AddPath(FpcDir+'units/'+lower(target_info.shortname)+'/rtl',false);
       end;
    end;
  { 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.outputbinary) then
   begin
     Message(option_switch_bin_to_src_assembler);
     set_target_asm(target_info.assemextern);
   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_info.name);
     set_target_asm(target_info.assemextern);
     Message1(option_asm_forced,target_asm.idtxt);
   end;

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

  if not LinkTypeSetExplicitly then
   set_default_link_type;

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

  option.free;
  Option:=nil;
end;


initialization
  coption:=toption;
finalization
  if assigned(option) then
   option.free;
end.
{
  $Log$
  Revision 1.74  2002-07-01 16:23:53  peter
    * cg64 patch
    * basics for currency
    * asnode updates for class and interface (not finished)

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

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

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

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

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

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

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

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

}