Table of Contents
- 1. System environment
- 2. Install package for building Yocto
- 3. Download poky
- 4. Run oe-init-build-env
- 5. conf/local.conf
- 6. Build Yocto with core-image-minimal
- 7. Run QEMU
1 System environment
This article uses virtual machine as below.
CPU core number 1 RAM 1GB スワップ 1GB ストレージ 80GB
2 Install package for building Yocto
Install package according to Yocto QuickStart.
$ sudo apt-get install -y gawk wget git-core diffstat unzip texinfogcc-multilib build-essential chrpath socat libsdl1.2-dev xterm
3 Download poky
Download poky which is build tools for Yocto.
$ git clone
4 Run oe-init-build-env
Run oe-init-build-env which will set PATH to build tools and create build directory.
$ cd poky$ . oe-init-build-env
A conf/local.conf defines CPU architecture, build thread number and make -j option number. This article use default local.conf which defines qemux86 as CPU architecture.
$ emacs conf/local.conf
BB_NUMBER_THREADS Build thread number PARALLEL_MAKE make -j option number MACHINE CPU architecture
6 Build Yocto with core-image-minimal
A core-image-minimal is recipe for building minimal rootfs without X-window package.
$ bitbake core-image-minimalWARNING: Host distribution “Ubuntu-16.04” has not been validated withthis version of the build system; you may possibly experienceunexpected failures. It is recommended that you use a tested distribution.
It takes 3 hours to build core-image-minimal on this system environment.
A size of build directory is about 20GB. If you use core-image-sato for building rootfs with X-window application, a size of build directory will be about 30G.
7 Run QEMU
After running oe-init-build-env, runqemu command can be used.
$ runqemu qemux86
Changing console to serial or GDB connection can be used.
$ runqemu qemux86 nographic$ runqemu qemux86 qemuparams=”-gdb tcp::10000 -S” # wait gdb’s target remote