The Linux kernel is a monolithic kernel and, as such, shares the same address space. Although it has the ability to load modules at runtime, the kernel must contain all the symbols the module uses at compilation time. Once the module is loaded, it will share the kernel's address space too.
The kernel build system (kbuild), uses conditional compilation to decide which parts of the kernel are compiled. kbuild is independent of the Yocto build system.
In this recipe, we will explain how kbuild works.
