openwrt编译

my***

ar71xx文件夹下：
md5sums
openwrt-ar71xx-generic-nbg460n_550n_550nh-u-boot.bin
openwrt-ar71xx-generic-rootfs.tar.gz
openwrt-ar71xx-generic-root.squashfs
openwrt-ar71xx-generic-root.squashfs-64k
openwrt-ar71xx-generic-tl-wdr3500-v1-squashfs-factory.bin
openwrt-ar71xx-generic-tl-wdr3500-v1-squashfs-sysupgrade.bin
openwrt-ar71xx-generic-tl-wdr3600-v1-squashfs-factory.bin
openwrt-ar71xx-generic-tl-wdr3600-v1-squashfs-sysupgrade.bin
openwrt-ar71xx-generic-tl-wdr4300-v1-squashfs-factory.bin
openwrt-ar71xx-generic-tl-wdr4300-v1-squashfs-sysupgrade.bin
openwrt-ar71xx-generic-tl-wdr4310-v1-squashfs-factory.bin
openwrt-ar71xx-generic-tl-wdr4310-v1-squashfs-sysupgrade.bin
openwrt-ar71xx-generic-uImage-gzip.bin
openwrt-ar71xx-generic-uImage-lzma.bin
openwrt-ar71xx-generic-vmlinux.bin
openwrt-ar71xx-generic-vmlinux.elf
openwrt-ar71xx-generic-vmlinux.gz
openwrt-ar71xx-generic-vmlinux.lzma
openwrt-ar71xx-generic-vmlinux-lzma.elf
packages
uboot-ar71xx-nbg460n_550n_550nh

怎么这么多，其实只需
openwrt-ar71xx-generic-tl-wdr4310-v1-squashfs-factory.bin
openwrt-ar71xx-generic-tl-wdr4310-v1-squashfs-sysupgrade.bin
请问编译怎么设置其它的统统不要。
谢谢{:soso_e100:}