make user_only时，出错，求助

hanhu

我在编译内核时，在make user_only时，编译user/busybox/applets.c时，出错，出错信息为：
busybox.elf2flt(.rodata+0x330):/home/hanhu/uClinux-dist/user/busybox/applets.c 79:undefined reference to 'basename_main'
busybox.elf2flt(.rodata+0x330):/home/hanhu/uClinux-dist/user/busybox/applets.c 85:undefined reference to 'data_main'
busybox.elf2flt(.rodata+0x330):/home/hanhu/uClinux-dist/user/busybox/applets.c 86:undefined reference to 'dmesg_main'
busybox.elf2flt(.rodata+0x330):/home/hanhu/uClinux-dist/user/busybox/applets.c 87:undefined reference to 'du_main'
..........
以下还有是undefined reference to hostname_main,kill_main,mount_name,route_main,umount_main,uptime_main
请各位说说是怎么回事，该怎么办？