Short options

Option	Argument	Values	Description
-h			Display the help message describing the options
-d	device	/dev/mmcblk0	Device to use for install.
-b	board	0, 0W, 1, 2, 3, 3P, 4	Type of the board: 0 (Pi0), 0W (Pi0W), 1 (Pi1), 2 (Pi2), 3 (Pi3), 3P (Pi3B+), 4 (4B)
-M	size	32, 64	Architecture 32 or 64 bits. This apply only on rPi 3, 3P and 4
-B	branch	rpi-X.XX.y	Install a specific kernel branch (from rPi kernel github repository).
-c	file	/path/to/cfg	Use your own kernel config file.
-k	lang	fr	Lang for the keymaps.
-H	hostname	gibolin	Fix the hostname.
-t	timezone	Europe/Paris	Fix the timezone.
-f	filesystem	f2fs, ext4	Filesystem for the root partition.
-C	file	/path/to/cfg	Use your own config.txt file.
-F	file	/path/to/cfg	Use your own fstab file. You are concerned only if you have chosen the --build-tarball option.
-w	file	/path/to/cfg	Use your own wpa_supplicant.conf file
-m	dir	/tmp/bldGenPiImg-XXXXXXXXXX	Set the working directory.
-T	Template	pidp11, pidp8i	Specify a template to build a specific image.
-u	username	As define in man useradd	Create a user on the pi. His default groups are defined in the config file and you will be asked for a password during the install.

(Defaults value in the table above are highlighted)

Long options

Option	Description
--help	Display the help message and the options list.
--add-kernel-src	Copy the kernel sources on the card, Beware that this will run make distclean on the actual sources.
--no-portage	Don't install the portage tree.
--build-image	Build an image to burn on the media.
--build-tarball	Build a tarball to expand on a pre-formated media. If you don't provide an fstab file via the -F option. You will need to install it after and tune your /boot/cmdline.txt.
--enable-serial	Enable serial communications. Might disable bluetooth on some boards.
--enable-usb-tether	Enable usb tethering. Might need some tweak on your computer. Actually only tested on Pi 0 and 0W.
--enable-sshd	Enable sshd server with root connections allowed. If ssh-add -L give a record it will be use for the connection, else use the password.
--set-root-pw	Choose your root password. You will be asked to type it. The characters won't appear when you will type. The password is not stored in clear. It will directly be used to generate the hash.
--use-qemu	Use qemu to compile packages on host. Replace the use of the firstRun script.