Bluetooth in a ROS package

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Hi, I'm new in the ROS world. I just wanna know how I can use Bluetooth in a ROS package. I added Bluetooth libraries in the source file by:

#include <bluetooth/bluetooth.h>
#include <bluetooth/hci.h>
#include <bluetooth/hci_lib.h>

and then I tried to retrieve the resource number to open the socket by:

dev_id = hci_get_route(NULL);
sock = hci_open_dev( dev_id );

but when I try to build this package I got errors saying:

undefined reference to `hci_get_route'

undefined reference to `hci_open_dev'

so this means the Bluetooth library is still not included. How I can add this? Any help will be appreciated.