cangen(1) on Linux
The text 2b4ca5f129e1, as Debian 10 (Buster) shipped it.
manual page for cangen 2018.02.0-1
Flags it lists
-
-D -
-I -
-L -
-R -
-b -
-e -
-f -
-g -
-i -
-m -
-n -
-p -
-v -
-x