0_readme-rpi4-debian-kernel-build.txt

thanks to :)

https://github.com/sakaki-/gentoo-on-rpi-64bit
https://blog.cloudkernels.net/posts/rpi4-64bit-image/

install first:

used system debian buster amd64 (4 cores)

~# apt-get install binutils-aarch64-linux-gnu gcc-aarch64-linux-gnu g++-aarch64-linux-gnu bison flex

1_rpi4-debian-aarch64-arm64-kernel.sh

#!/bin/bash

# go in to kernel dir first
# https://github.com/raspberrypi/linux

rm -rf kernel-build

mkdir kernel-build

git pull

#make O=./kernel-build/ ARCH=arm64 CROSS_COMPILE=aarch64-linux-gnu- bcm2711_defconfig
# Download from gentoo :) thanks fot sakaki :)
wget https://raw.githubusercontent.com/sakaki-/gentoo-on-rpi-64bit/master/configs/bcm2711_defconfig-bis -O kernel-build/.config
yes "" | make O=./kernel-build/ ARCH=arm64 CROSS_COMPILE=aarch64-linux-gnu- oldconfig

make O=./kernel-build/ ARCH=arm64 CROSS_COMPILE=aarch64-linux-gnu- menuconfig
make -j4 O=./kernel-build/ ARCH=arm64 CROSS_COMPILE=aarch64-linux-gnu-

export KERNEL_VERSION=`cat ./kernel-build/include/generated/utsrelease.h | sed -e 's/.*"\(.*\)".*/\1/'`

make -j4 O=./kernel-build/ DEPMOD=echo MODLIB=./kernel-install/lib/modules/${KERNEL_VERSION} INSTALL_FW_PATH=./kernel-install/lib/firmware modules_install
make -j4 O=./kernel-build/ INSTALL_HDR_PATH=./kernel-install/usr/src/linux-headers-${KERNEL_VERSION}/ DEPMOD=echo MODLIB=./kernel-install/lib/modules/${KERNEL_VERSION} INSTALL_FW_PATH=./kernel-install/lib/firmware headers_install