编译busybox出现的一个问题求解决！

In file included from /usr/include/linux/sysctl.h:25:0,
from /usr/include/linux/netfilter.h:6,
from /usr/include/linux/netfilter_ipv4.h:8,
from networking/tcpudp.c:35:
/usr/include/linux/kernel.h:12:8: error: redefinition of ‘struct sysinfo’
include/libbb.h:107:8: note: originally defined here
make[1]: *** [networking/tcpudp.o] Error 1
make: *** [networking] Error 2
我是直接拷贝的busybox压缩包。涉及到重复定义的问题，可是我不会，求大神解决。