CONFIG_CMDLINE is not available for the selected architecture x86.
Result is shown for architecture arm64
Default kernel command string
configname: CONFIG_CMDLINE
Linux Kernel Configuration
└─>Boot options
└─>Default kernel command string
In linux kernel since version 2.6.12 )
Provide a set of default command-line options at build time by
entering them here. As a minimum, you should specify the
root device (e.g. root=/dev/nfs).
entering them here. As a minimum, you should specify the
root device (e.g. root=/dev/nfs).