Linux Appliance Builder
These scripts are useful for building Linux appliances or firmware images that do not require a full user-land and have a custom kernel configuration with optional patches. It also has a script to build a unified kernel image with the initrd and command line in a signed EFI application.
linux-builder
To use, start with a linux.config file and run:
linux-builder \
-v \
--version 5.4.117 \
--config linux.config
This will download Linux 5.4.117 from kernel.org, (todo verify it),
unpack it, apply any patches, generate the .config file for it
and then invoke a recursive make to build it in ./build.
initrd-builder
For the kernel’s initial ramdisk cpio file, you might be able to just list the binaries that you want to include and then:
initrd-builder \
-v \
-o build/initrd.cpio.xz \
base-initrd.conf \
my-initrd.conf
unify-kernel
unify-kernel \
--kernel build/vmlinuz-linux \
--initrd build/initrd.cpio.xz \
--commandline commandline.txt \
-o build/bootx64.efi
