[fpc-pascal] using oldlinux

[Koenraad Lelong]

Hi,
Anyone has suggestions why I can't compile the following :

unit test1;

interface

function ReadCOM(portnum : integer; inlen : integer; var inbuf : array 
of byte) : integer;

implementation

uses baseunix, oldlinux;

function ReadCOM(portnum : integer; inlen : integer; var inbuf : array 
of byte) : integer;

var
  fd : integer;
  filedescr : TFDSet;
  tval : timeval;
  cnt : integer;
  timeout : boolean;

begin

  fpFD_ZERO(filedescr);
  fpFD_SET(fd,filedescr);
  tval.sec:=0;
  tval.usec:=10000;
  if fpSelect(fd+1, at filedescr,nil,nil, at tval)>0 then
   if fpread(fd,inbuf[cnt],1)<>1 then
    timeout:=true
   else
    inc(cnt)
  else timeout:=true;
if not timeout then
  ReadCom:=inlen
else
  ReadCom:=cnt;
end;

end.

I'm getting the following error :
test1(22,21) Error: call by var parameters have to match exactly: Got 
"fdSet" expected "TFDSet"
test1(23,23) Error: call by var parameters have to match exactly: Got 
"fdSet" expected "TFDSet"
I changed filedescr to fdset and back to TFDSet with the same result.
That's with FPC 2.0.0.
TIA
Koenraad Lelong.