7.4.2. do_diffconfig

When invoked by the user, this task creates a file containing the differences between the original config as produced by do_kernel_configme task and the changes made by the user with other methods (i.e. using (do_kernel_menuconfig). Once the file of differences is created, it can be used to create a config fragment that only contains the differences. You can invoke this task from the command line as follows:

     $ bitbake linux-yocto -c diffconfig
            

For more information, see the "Creating Configuration Fragments" section in the Yocto Project Linux Kernel Development Manual.