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 typertadv.c:124: error: dereferencing pointer to incomplete typertadv.c:124: error: dereferencing pointer to incomplete typertadv.c:130: warning: dereferencing type-punned pointer will break strict-aliasing rulesrtadv.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 undefinedrtadv.c:268: error: dereferencing pointer to incomplete typertadv.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>