makefs(8) on Linux
The text c3bdd654f5c3, as Debian 9 (Stretch) shipped it.
create a file system image from a directory tree
Flags it lists
-
-B -
-F -
-M -
-N -
-S -
-T -
-b -
-d -
-f -
-m -
-o -
-s -
-t -
-x