In the last couple of weeks, I had been reading books about building embedded Linux systems: Embedded Linux Primer and Building Embedded Linux Systems. The former is a good start to get familiar with the world of embedded Linux. While I found the latter provides more detailed technical steps to build embedded Linux systems. I have walked through the steps given in the latter book, but it was unsuccessful due to toolchain version incompatibility. Having tried to update the tool versions, I still couldn’t get it built successfully.
After googling for a while, I found this nice tutorial. By following the guide, I managed to build Linux kernel 4.4.0 and rootfs image which was populated using Busybox. They were then run on QEMU emulating Versatile Express Development Board.
The feeling to see the screen above for the first time was priceless.. You know what I mean 🙂
One small note about the tutorial above is that there is a change on the link of Linaro ARM compiler. The link below is that I refer to:
Also, in the steps of building the Busybox, the tutorial missed the install command which should be invoked after compile step (make -j4). So I used this command:
ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- make install
The above command effectively create and populate a directory called _install, whose contents that will be copied in our root file system.