Changing RootFS in SDK 1.3.2

Document created by Paul Genua Employee on May 13, 2013Last modified by Paul Genua Employee on Apr 30, 2018
Version 2Show Document
  • View in full screen mode

Occasionally, one may want to change the root filesystem, and then rebuild the image using Yocto as per the standard SDK.  The SDK manual, goes through the steps necessary in Chapter 2 of the QorIQ_SDK_Infocenter.pdf document.


In the following examples I assume you've already installed the SDK, and set up the host environment. I also assume you compiled an image once already, and through doing so have already run the fsl-setup-poky script. I'm using a P3041DS system, and in my case, the first thing I ran to set up my build was:

     source ./fsl-setup-poky -m p3041ds -j 4 -t 4

As a first example, on my P3041DS system I am using fm1-gb4 as my ethernet port. I want to assign it the static address of In order to do so, I need to create my own /etc/network/interfaces file to implement this function:


     cd <yocto_install_path>

     bitbake -c cleansstate netbase


Then go into the netbase folder:

     cd meta-fsl-ppc/recipes-append/netbase/files


Within this directory, I create an interfaces file for my target:

          auto lo

          iface lo inet loopback


          iface fm1-gb4 inet static






At this point, I just rebuild my image:

     bitbake fsl-image-core

And the network definitions will be installed. (note that I'm building fsl-image-core, but you could build whatever target you're currently using, i.e. fsl-image-minimal)




As a second example, I wish to add a pre-build binary (custom application) into the rootfs. In this example I have an custom application, mr_access that I want to install into /usr


     cd <yocto_install_path>

Then add the files:

     cd meta-fsl-ppc-private/recipes-tools/merge-files

Now, put the files into files/merge. I added mr_access into files/merge/usr

Build the new rootfs image:

     bitbake fsl-image-core