I've never used Lazarus so I'm not sure how it handles Delphi compatability.

When I use the command compiler I do the following...

1. Check that fpc.cfg contains the paths to the JEDI-SDL files ( sdl.pas, jedi-sdl.inc, gl.pas, glu.pas etc ). If the paths are not there, add them into the file.

2. At a command line type the following...
Code:
fpc -Sd tutorial7.pas
If 1. is set up correctly, 2 should just work and you do not need to dereference anything.

If you definitely want to dereference it, then try what Paul suggested. The thing is, if you are using Delphi compatibility mode, you do NOT need to dereference, because Delphi supports smart dereferencing.