grep '^CONFIG_TOOLCHAINOPTS=y' .config >> tmp/.diffconfig.head
grep '^CONFIG_BUSYBOX_CUSTOM=y' .config >> tmp/.diffconfig.head
grep '^CONFIG_TARGET_PER_DEVICE_ROOTFS=y' .config >> tmp/.diffconfig.head
+make -s ./scripts/config/conf
./scripts/config/conf --defconfig=tmp/.diffconfig.head -w tmp/.diffconfig.stage1 Config.in >/dev/null
./scripts/kconfig.pl '>+' tmp/.diffconfig.stage1 .config >> tmp/.diffconfig.head
./scripts/config/conf --defconfig=tmp/.diffconfig.head -w tmp/.diffconfig.stage2 Config.in >/dev/null