https://www.baeldung.com/linux/oldconfig-target-kernel-makefile
    We can automatically generate a config to build upon from various targets:

    • defconfig – Generates a default config for the current architecture from predefined rules, such as arch/x86/configs/x86_64_defconfig for x86_64 systems.
    • localmodconfig – Generates a config based on the current kernel’s configuration and loaded modules to disable unneeded modules.
    • localyesconfig – Similar to localmodconfig but changes all module (m) options to built-in (=y).