Might be a doc error:
Code:
Makefile: @echo ' menuconfig - interactive curses-based configurator'
Makefile: @echo ' busybox-menuconfig - Run BusyBox menuconfig'
Makefile: @echo ' linux-menuconfig - Run Linux kernel menuconfig'
Makefile: @echo ' uclibc-menuconfig - Run uClibc menuconfig'
Makefile: @echo ' barebox-menuconfig - Run barebox menuconfig'
I'll try to make time tomorrow to look into it.