Mark custom function for interactive use only

[Sebastian Wiesner]

Hello,

as you all know, the byte compiler warns if some functions (e.g.
"next-line") are called from Lisp.

Is there a way to mark my own functions for "interactive use only" and
have the byte compiler emit the same warning for these functions, too?
 Do I need to set a special symbol property, etc.?

Greetings,
Sebastian Wiesner