+grep \^CONFIG_TARGET_DEVICE_ .config >> tmp/.diffconfig.head
+grep '^CONFIG_ALL=y' .config >> tmp/.diffconfig.head
+grep '^CONFIG_ALL_KMODS=y' .config >> tmp/.diffconfig.head
+grep '^CONFIG_ALL_NONSHARED=y' .config >> tmp/.diffconfig.head
+grep '^CONFIG_DEVEL=y' .config >> tmp/.diffconfig.head
+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
+./scripts/config/conf --defconfig=tmp/.diffconfig.head -w tmp/.diffconfig.stage1 Config.in >/dev/null