how to link external package into our project?

Hi, I am having SK-S7G2 starter kit. I want to learn BLE communication using this kit. I found a sample project based on RL78 family. it is working fine. Then I wanted to replicate same project on my own. I have created all the threads and objects.
But The original project's src folder is having rBLE folder. I don't know how to incorporate it in to my project. I just copied and pasted it in the src folder of my project. But there is header file missing error. but i saw there is all the header files in the rBLE package. I don't know how to link the rBLE package properly. Please any one help me to do this.