Okay, great, we now have an initial kernel config file (.config) generated for us via the localmodconfig Makefile target, as shown in detail in the previous section, which is a good starting point. Now, we want to further examine and fine-tune our kernel's configuration. One way to do this – in fact, the recommended way – is via the menuconfig Makefile target. This target has the kbuild system generate a pretty sophisticated (C-based) program executable (scripts/kconfig/mconf), which presents to the end user a neat menu-based UI. In the following code block, when we invoke the command for the first time, the kbuild system builds the mconf executable and invokes it:
$ make menuconfig
UPD scripts/kconfig/.mconf-cfg
HOSTCC scripts/kconfig/mconf.o
HOSTCC scripts/kconfig/lxdialog/checklist.o
HOSTCC scripts/kconfig/lxdialog/inputbox.o
HOSTCC scripts/kconfig/lxdialog/menubox.o
HOSTCC scripts/kconfig/lxdialog...
