mstaack / pi-audio

Setup

Download & Setup Buildroot

$ wget https://buildroot.org/downloads/buildroot-2020.08.1.tar.gz
$ tar -xf buildroot-2020.08.1.tar.gz
$ make raspberrypi3_defconfig

Make Changes

$ make menuconfig

Save minimal changes to source defconfig file (./config/raspberrypi3_defconfig)

$ make savedefconfig

RT-Patch.

Select PREEMPT Type Config with ?

$ make linux-menuconfig

Change Kernel Configuration to use changes?!

current:

BR2_LINUX_KERNEL_CUSTOM_TARBALL=y
BR2_LINUX_KERNEL_CUSTOM_TARBALL_LOCATION="$(call github,raspberrypi,linux,1c64f4bc22811d2d371b271daa3fb27895a8abdd)/linux-1c64f4bc22811d2d371b271daa3fb27895a8abdd.tar.gz"
BR2_LINUX_KERNEL_DEFCONFIG="bcm2709"

safe linux config somewhere?! select changed config? use BR2_LINUX_KERNEL_CONFIG_FRAGMENT_FILES ?

Fresh Build

$ make clean && time make all 2>&1 | tee build.log

Main Logs

$ tail -f build.log | grep ">>>"

SD-Card

$ sudo dd if=output/images/sdcard.img of=/dev/sdc bs=1M