[BRLTTY] precision regarding brltty 4 doesn't compile: make stops...

[Labrador]

I forgot to say, this is my configure command:
./configure --enable-standalone-programs --with-braille-driver=al --with-braille-device=USB: --with-text-table=de 

The goal consist of building a static bin for an al USB: de
I have to put it on a notebook without touching that o s and with the goal
to be launched for my attached Alva on that notebook.

Labrador