busybox-1.13.0编译通不过

这是《step by step》的step10，配置时都是按照教材操作的，最后在Linux系统里面使用命令
#make;make install，产生以下错误提示：
   In file included from /opt/EmbedSky/4.3.3/bin/../arm-none-linux-gnueabi/libc/usr/include/linux/if_tunnel.h:5,
                 from networking/libiproute/iptunnel.c:24:
/opt/EmbedSky/4.3.3/bin/../arm-none-linux-gnueabi/libc/usr/include/linux/ip.h:85: error: redefinition of 'struct iphdr'
make[1]: *** [networking/libiproute/iptunnel.o] Error 1
make: *** [networking/libiproute] Error 2
  CC      networking/libiproute/iptunnel.o
In file included from /opt/EmbedSky/4.3.3/bin/../arm-none-linux-gnueabi/libc/usr/include/linux/if_tunnel.h:5,
                 from networking/libiproute/iptunnel.c:24:
/opt/EmbedSky/4.3.3/bin/../arm-none-linux-gnueabi/libc/usr/include/linux/ip.h:85: error: redefinition of 'struct iphdr'
make[1]: *** [networking/libiproute/iptunnel.o] Error 1
make: *** [networking/libiproute] Error 2
    请问这个问题怎么解决？如果这里不通过，以下的事情都无法进行了，请大家帮帮忙呀！

论坛里面有解决方法，你搜索一下论坛就可以获取到答案了。

把struct iphdr 改为struct ip_hdr

编译可以通过的

redefinition重定义了