ODROID-C4 Gentoo Overlay

This overlay includes ebuilds to install Gentoo Linux on ODROID-C4 devices using sources by @tobetter

Add the Overlay

emerge --ask app-eselect/eselect-repository
eselect repository add odroidc4 git https://github.com/svoop/odroidc4-overlay
emerge --sync

Install Gentoo on an ODROID C4

See INSTALL.md for a "worked for me" install log on a virgin ODROID C4.

Feel free to fork and submit pull requests for fixes or enhancements.

Recover from Boot Failure

If a new kernel or config changes prevents the ODROID C4 from booting, hit Ctrl-C during boot and at the U-boot prompt enter:

setenv devtype "mmc"
setenv devnum 0
setenv partition 1

Then copy and paste all commands from boot.ini using the previously working kernel version instead. You have to know the UUID of the root filesystem, otherwise, you'd have to guess the root filesystem device e.g. /dev/mmcblk1p2.

Update Kernel in Overlay

The latest ODROID C4 compatible kernel version is 5.11.y from tobetter. The commit used by any particular ebuild is set by REF. To find out the kernel version of any commit in the repository, check the top lines of the root Makefile.