Embedded Linux Development Using Yocto Project Cookbook - Second Edition

How to do it...

The kernel kbuild system reads its configuration at build time from a .config text file in the kernel root directory. This is referred to as the kernel configuration file. It is a text file where each line contains a single configuration variable that starts with the CONFIG_ prefix.

There are multiple ways to modify a kernel configuration file:

1. Manually editing the .config file, although this is not recommended.
2. Using one of the user interfaces the kernel offers (type the make help command for other options):

• • menuconfig: An ncurses menu-based interface (make menuconfig)
  • xconfig: A Qt-based interface (make xconfig)
  • gconfig: A GTK-based interface (make gconfig)

3. Automatically, via a build system such as Yocto.

Note ...