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Kodi texturepacker wont compile6/2/2023 What if you just want to compile a third-party kernel module compatible with the latest official Raspberry Pi kernel? In my case I wanted to compile the DirectFB Fusion module without having to build a complete kernel. Now we can build our kernel, then install the kernel modules: makeĬp arch/arm/boot/dts/overlays/*.dtb* /boot/overlays/įinally copy the compressed kernel for your Pi model to the boot partition - for Raspberry Pi 1: cp -v arch/arm/boot/zImage /boot/kernel.imgįor Raspberry Pi 2 & 3: cp -v arch/arm/boot/zImage /boot/kernel7.imgįor Raspberry Pi 4: cp -v arch/arm/boot/zImage /boot/kernel7l.img ![]() If you want you can customize the kernel configuration: config file for your Raspberry Pi model - for Raspberry Pi 1: make bcmrpi_defconfig Issue the following sed command if you want the kernel to appear exactly as the official one (with a 5.15.X+ version string): sed -i 's/EXTRAVERSION =.*/EXTRAVERSION = +/' MakefileĬreate a default kernel. Then we compile them into a shared library, put it in place and make sure it gets used as a replacement for glibc's functions.Įcho "/usr/lib/libarmmem-v6l.so" > /etc/ld.so.preloadĮcho "/usr/lib/libarmmem-v7l.so" > /etc/ld.so.preloadįirst grab the latest kernel sources if you haven't got them already: wget Īfter unpacking, ensure the sources are in pristine condition: make mrproper To use them, grab a copy from this github repository: wget -O These ARM-accelerated versions of selected functions from string.h replace the default routines of the glibc library. This re-creates the ext4 partition with the maximum size available.įinally, reboot your Pi, then perform the actual resize: resize2fs /dev/mmcblk0p2 Then press 'n', 'p', '2', the Start sector, 'enter' and 'w'. Note the Start sector (540672 on the PiLFS Base image) of the Linux partition. Start fdisk and press 'p' to print the partition table: fdisk /dev/mmcblk0 When you write an image to your SD card, you'll usually want to resize the data partition to fit the free space available on the card. You can keep an eye on the current frequency and temperature with these commands: cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq Make install-switch-cpu-governor from the PiLFS Bootscripts takes care of this step for you on boot. The final step is to switch the cpufreq governor from the default "powersave" to "ondemand" with this command:Įcho "ondemand" > /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor These are the preset values offered by Raspbian's raspi-config: Variable The first step is to add a set of overclock values to your /boot/config.txt. On Septemthe Raspberry Pi Foundation introduced a Pi "turbo mode", which dynamically enables overclock and overvolt under the control of a cpufreq driver, without affecting your warranty. Make install-rngd from the PiLFS Bootscripts takes care of starting the daemon. You'll need to build rngd which in turn will feed applications with random goodness from the hardware RNG. The BCM2835 chip on the Pi contains a hardware entropy source that can be tapped by crypto-heavy applications to improve the quality of randomness and might even help speed up some operations. To activate the swap file on boot, add a line to /etc/fstab /swapfile swap swap pri=1 0 0ģ Tapping the Pi Hardware Random Number Generator To create a swap file where count is the number of megabytes you'd like: dd if=/dev/zero of=/swapfile bs=1M count=512 Provides automatic control of the Fan SHIM on Raspberry Pi 4.Īn empty init script in which to add your own autostart applications. Simple modification to the BLFS sshd init script that will generate new keys if missing. Switches the cpufreq governor from the default "powersave" to "ondemand" which allows for overclocking the Pi. Start/stop script for the Random Number Generator Daemon for use with the hardware RNG device present on the Pi. This script adds a save/restore function to set an approximate date until the exact date can be obtained via NTP. The Pi doesn't have a way of keeping time between reboots. ![]() This fix simply adjusts the timing of that init script. This won't work if you're using a swap file instead of a dedicated swap partition. The original LFS swap init script will try to enable swap space before the root file system is properly mounted. All it does is add vm.min_free_kbytes=8192 to /etc/nf Without this fix, it's easy to hang the Pi when doing a lot of work over SSH. This little fix tells the kernel to keep 8MB of RAM free at all times for incoming network traffic. ![]() The PiLFS Bootscripts tarball is a small collection of scripts and fixes from various sources that are specific to the Raspberry Pi. Use these recipes as a complement to Beyond Linux From Scratch to expand your system.
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