cfcfg
Yet another Linux kernel configuration comparator
...The resulting text file is coloured when the output is to a terminal; the colours can be retained when redirecting the output to a file or pipe.
Now comes with a program to extract configuration variable names and their prompts from their kernel build system, to create a symbol table. The comparison program can use this table to further annotate its output.
This program can also be used to create a commented "pretty-print" of a kernel configuration by comparing it with an empty one such as /dev/null.