industrialNETworX

I'm tryng to test an open master etherCAT but when compiling the NIC driver I recive the following error:

undefined reference to `socket'
undefined reference to `setsockopt'
undefined reference to `ioctl'
undefined reference to `bind'
undefined reference to `fcntl'
undefined reference to `send'
undefined reference to `recv'

and also

undefined reference to `pthread_mutex_lock'
undefined reference to `pthread_mutex_unlock

are the socket api not present in the library libc,librcx or librcx_netx100? where can I find them? or maybe are there some  rcx functions/drivers that can be use in place of the socket api? which one? 

Thanks a lot!