basierend auf : https://www.raspberrypi.com/documentation/computers/linux_kernel.html#building

• sudo apt install git bc bison flex libssl-dev make libncurses5-dev #I think this is all the tools required
• mkdir kernel && cd kernel/
• git clone --depth=1 --branch rpi-6.12.y https://github.com/raspberrypi/linux
• wget https://mirrors.edge.kernel.org/pub/linux/kernel/projects/rt/6.12/patch-6.12.28-rt10.patch.gz
• cd linux/
• zcat ../patch-6.12.28-rt10.patch.gz | patch -p1 --dry-run #check the patch fits
• zcat ../patch-6.12.28-rt10.patch.gz | patch -p1
• KERNEL=kernel8
• make bcm2711_defconfig
• make menuconfig #General → Preemption Model select Real Time option
• nano .config #add personalised suffix to CONFIG_LOCALVERSION
• make -j4 Image.gz modules dtbs

echo $KERNEL sudo make modules_install sudo cp arch/arm64/boot/dts/broadcom/*.dtb /boot/ sudo cp arch/arm64/boot/dts/overlays/*.dtb* /boot/overlays/ sudo cp arch/arm64/boot/dts/overlays/README /boot/overlays/ sudo cp arch/arm64/boot/Image.gz /boot/$KERNEL.img

• https://www.raspberrypi.com/documentation/computers/linux_kernel.html
• Ursprung: https://forums.raspberrypi.com/viewtopic.php?t=344994
• https://blog.emlid.com/raspberry-pi-real-time-kernel/