Compile Linux firmware

Compile Ubuntu firmware

This chapter introduces the compilation process of Ubuntu firmware. It
is recommended to develop under Ubuntu 20.04 system environment. If
you use other system versions, you may need to adjust the compilation
environment accordingly.

The compilation portion of this tutorial works with SDK versions above
v0.1.0a

   $ readlink -f .repo/manifest.xml
   /home/daijh/p/rk3576/.repo/manifests/rk3576/rk3576_linux_release_20240606_v0.1.0a.xml

Preparatory work

Set up compilation environment

   sudo apt-get install repo git ssh make gcc libssl-dev liblz4-tool \
   expect g++ patchelf chrpath gawk texinfo chrpath diffstat binfmt-support \
   qemu-user-static live-build bison flex fakeroot cmake gcc-multilib g++-multilib \
   unzip \
   device-tree-compiler ncurses-dev \

Compile SDK

Precompile Configuration

There are configuration files for different board in
"device/rockchip/rk3576/", select the configuration file:

   ./build.sh firefly_rk3576_aio-3576jd4_ubuntu_defconfig

Build

Automatic compilation

Download: Rootfs，put in SDK path

   7z x Ubuntu[xx.xx]-xxxx_RK3576_vx.x.xx_xxxxxxxx.7z
   mkdir prebuilt_rootfs/
   mv Ubuntu[xx.xx]-xxxx_RK3576_vx.x.xx_xxxxxxxx.img prebuilt_rootfs/rk3576_ubuntu_rootfs.img

start compiling

   ./build.sh

the firmware will be saved to the directory "output/update/".

Partial compilation

u-boot

   ./build.sh uboot

kernel

   ./build.sh extboot

recovery

   ./build.sh recovery

Download: Rootfs，put in SDK path

   7z x Ubuntu[xx.xx]-xxxx_RK3576_vx.x.xx_xxxxxxxx.7z
   mkdir prebuilt_rootfs/
   mv Ubuntu[xx.xx]-xxxx_RK3576_vx.x.xx_xxxxxxxx.img prebuilt_rootfs/rk3576_ubuntu_rootfs.img

Pack the firmware, the firmware will be saved to the directory
output/update/.

   ./build.sh updateimg