Script to build a bootable Linux kernel for the Excito B2.
buildkernel-b2 is a script that builds a Gentoo Linux kernel image suitable for booting either from the B2's internal disk (default), or from a USB key (when the --usb option is specified).
It is useful when targeting a B2 system with:
- the default U-Boot settings in flash memory; and
- a payload kernel that has size > 4MiB uncompressed (or > 2MiB compressed).
buildkernel-b2 should be run as root, in the top level kernel source directory. You will need an appropriate .config file in place when building the kernel (which must have had the gentoo-b2-kernel-patches patchset applied; the kernel provided by gentoo-b2-sources from the gentoo-b2 overlay is suitable, for example).
You can run buildkernel-b2 either on the B2 directly, or on a Gentoo PC (with an appropriately configured crossdev setup).
If running on a PC, a directory deploy_root will be created as a result of running the script, with the necessary files for you to copy across to your B2.
If running on the B2 natively, the files (kernel, modules, DTB, config and System.map) will be moved to the correct positions for you (and prior copies of all but the modules backed up).
Please see the included manpage for further details.
buildkernel-b2 is best installed (on Gentoo) via its ebuild, available as part of the gentoo-b2 overlay.