OS requirements

To install Docker, you need the 64-bit version of one of these Ubuntu versions:

• Focal 20.04 (LTS)
• Bionic 18.04 (LTS)
• Xenial 16.04 (LTS)
• Trusty 14.04 (LTS)

Note: the dockerfile is used for arm64 socs by default.

The below is used for arm32 Socs: cp dockerfile-32 dcokerfile

Install Docker

Use this command to install the latest version of Docker(replace docker with docker.io in ubuntu 14.04):

sudo apt-get install -y docker qemu-user-static binfmt-support docker

Start run Docker deamon:

sudo ervice docker start

Build Docker image by dockerfile:

sudo docker build -t rockchip .

Now you get a Docker image named "rockchip" which include a debian multiarch cross-compiling enviroment.

Build application

1. Enter docker shell:

    docker run -it -v <package dir>:/home/rk/packages rockchip /bin/bash
   

2. Start build:

for arm 32bit Socs：

        cd /home/rk/packages/<package-name>
        DEB_BUILD_OPTIONS=nocheck dpkg-buildpackage -rfakeroot -b -d -uc -us -aarmhf
        ls ../ | grep *.deb

for arm 64bit Socs：

        cd /home/rk/packages/<package-name>
        DEB_BUILD_OPTIONS=nocheck dpkg-buildpackage -rfakeroot -b -d -uc -us -aarm64
        ls ../ | grep *.deb

Modify image

If you want to modify your Docker image, you can open a shell by below command:

    docker run -it rockchip /bin/bash

After exit from container, you should use below command to save your changes.

    docker commit  <container_id> rockchip

Others

To get more informations about dockers, please check below link: https://docs.docker.com https://www.runoob.com/docker/docker-tutorial.html