undefined reference to `pthread_create`的解决方法

编译的时候突然报这些错误：

libaeron_driver.so: undefined reference to `pthread_getspecific'
libaeron_driver.so: undefined reference to `pthread_key_create'
libaeron_driver.so: undefined reference to `pthread_once'
libaeron_driver.so: undefined reference to `pthread_setspecific'
libaeron_driver.so: undefined reference to `pthread_setname_np'
libaeron_driver.so: undefined reference to `pthread_join'
libaeron_driver.so: undefined reference to `pthread_create'

全是与线程有关的。

所以咯，最终发现是线程库没有链接，在编译选项中添加"-lpthread" ，编译通过。

至于undefined reference to错误，还有其他好多原因，这里就只讨论这一种哦。