[LAD] basic g++ compiling of faust programs

[Renato]

Hi, just started looking into faust and I've got a very basic question.
I'm getting this error:

$ g++ -L/usr/lib/faust simple.cpp -o simple
simple.cpp:46:21: fatal error: gui/FUI.h: No such file or directory
compilation terminated.

where simple.cpp was generated by:
$ faust -a jack-qt.cpp simple.dsp -o simple.cpp

what am I missing? I also tried without the -L option or with -lFUI,
same error. FUI.h is indeed in /usr/lib/faust/gui/

best regards, 
renato