This is a copy of the kconfig code in the kernel (currently 3.9-rc2) tweaked to suit Buildroot. To update: cp -r /usr/src/linux/scripts/kconfig support/kconfig.new cd support/config.new cp -a ../kconfig/patches ../kconfig/README.buildroot2 . quilt push -a # Fix any conflict cd .. rm -rf config mv kconfig.new kconfig Then verify the toplevel targets work: config defconfig menuconfig xconfig gconfig oldconfig