C/C++ error: storage size of ‘tv’ isn’t known错误解决方法

C/C++ error: storage size of ‘tv’ isn’t known错误解决方法

最近在编译移植lwm2m时，有一个获取时间的函数gettimeofday(struct timeval *, struct timezone *);

#include "time.h"
struct timeval tv;
gettimeofday(&tv, NULL);
...
...

编译时，提示错误storage size of ‘tv’ isn’t known，百度这个函数之后，发现函数的头文件不对，应该是

#include "sys/time.h"
struct timeval tv;
gettimeofday(&tv, NULL)