路由软件 zebra-0.95a 在linux下面编译出现问题的解决
1.问题现象
解压缩zebra-0.95a压缩包，编译，出现问题：
./configure
make

后出现：

rtadv.c: In function ‘rtadv_recv_packet’:
rtadv.c:123: error: dereferencing pointer to incomplete type
rtadv.c:124: error: dereferencing pointer to incomplete type
rtadv.c:124: error: dereferencing pointer to incomplete type
rtadv.c:130: warning: dereferencing type-punned pointer will break strict-aliasing rules
rtadv.c: In function ‘rtadv_send_packet’:
rtadv.c:149: error: invalid application of ‘sizeof’ to incomplete type ‘struct in6_pktinfo’ 
rtadv.c:194: warning: operation on ‘node’ may be undefined
rtadv.c:268: error: dereferencing pointer to incomplete type
rtadv.c:269: error: dereferencing pointer 

2.解决
打开zebra-0.95a/lib/zebra.h文件，
定位到103行，添加如下内容，即可解决。

#ifdef GNU_LINUX
#define  __USE_GNU
#endif
=========================

#ifdef HAVE_SYS_SOCKIO_H
#include <sys/sockio.h>
#endif /* HAVE_SYS_SOCKIO_H */

/** Added ***/
#ifdef GNU_LINUX
#define  __USE_GNU
#endif
/**   end added **/

#ifdef HAVE_NETINET_IN_H
#include <netinet/in.h>
#endif /* HAVE_NETINET_IN_H */
#include <netinet/in_systm.h>
#include <netinet/ip.h>
#include <netinet/tcp.h>