I inherited some Delphi components/code that currently compiles with C++ Builder 2007. I'm simply now trying to compile the components with C++ Builder RAD XE. I don't know Delphi (object pascal).

Here are the versions of the 'Supports' functions that appear to be in conflict. Is there a compiler switch I can use to make RAD XE backward compatible? Or is there something I can do to these function calls to correct the ambiguous nature?

{$IFNDEF DELPHI5}

procedure FreeAndNil(var Obj);
var
  Temp: TObject;
begin
  Temp := TObject(Obj);
  Pointer(Obj) := nil;
  Temp.Free;
end;

function Supports(const Instance: IUnknown; const Intf: TGUID; out Inst): Boolean; overload;
begin
  Result := (Instance <> nil) and (Instance.QueryInterface(Intf, Inst) = 0);
end;


function Supports(Instance: TObject; const Intf: TGUID; out Inst): Boolean; overload;
var
  Unk: IUnknown;
begin
  Result := (Instance <> nil) and Instance.GetInterface(IUnknown, Unk) and
    Supports(Unk, Intf, Inst);
end;

{$ENDIF}


{$IFNDEF DELPHI6}

function Supports(const Instance: TObject; const IID: TGUID): Boolean;
var
  Temp: IUnknown;
begin
  Result := Supports(Instance, IID, Temp);
end;

{$ENDIF}