Compiler layout parameters

[Carlo Vanoni]

Hi everyone.

I'm a programmer, and I'm used to use command line parameters when compiling a program.
As an example:

gcc my_source_code.c -I"include_folder" -o my_program

Here, I tell the compiler to watch inside "include_folder" for files to include during the copilation process.

My idea is to define a layout behaviour at compile time.
Why? Here is an example.
I have a bass guitar transcription. For teaching purpose, I add to each note which left-hand finger to use. Then, I would like to have a more clean score for me, without oll these numbers on top of the note.
Basically, I would like to use the seme .ly file with all the infos, and then use (pseudo code here...)

  lilypond my_score.ly omit_finger_tips ##f

to create the teaching score, and

  lilypond my_score.ly omit_finger_tips ##t

to create the cleaner score.

Is there a way to do this?
And does it make any sense to you?

Thanks!
MIX