Opengl - get rid of glu dll

[Chebmaster]

I wasn't aware of the 'absolute' keyword

Be wary it doesn't always work. If you have register variables optimization on, the compiler sometimes gets confused.
Example: my attempt to implement Carmack's fast inverse square root.

    function FastInverseSquareRoot(a: float): float; inline;
    var
      i: longint absolute Result;
    begin
      Result:= a;
      i:= $5f3759df - (i shr 1);
      Result*= 1.5 - (a * 0.5 * Result * Result);
      Result*= 1.5 - (a * 0.5 * Result * Result);
    end;

- it failed craptacularly. The compiler did not give an error but generated totally rubbish code seqence (I turned on ASM output to check).

So I had to settle on

    // https://en.wikipedia.org/wiki/Fast_inverse_square_root
    function FastInverseSquareRoot(a: float): float; inline;
    var
      i: longint;// absolute Result; //code generator FAILS to marry SSE2 and general-purpose registers
    begin
      //Result:= a;
      i:= longint(pointer(@a)^);
      i:= $5f3759df - (i shr 1);
      Result:= float(pointer(@i)^);
      Result*= 1.5 - (a * 0.5 * Result * Result);
      Result*= 1.5 - (a * 0.5 * Result * Result);
    end;

P.S. So I'd group absolute together with goto: necessary for backward compatibility but not recommended to use unless you have a very good understanding of processes involved.