Hi, I am working to create an HRM for the IPod and as part of that I need to use the c-code that came with the manual. Also, I need to access the serial interface the Tx and Rx pins. Having said that, I have the code ready to be compiled. But here is where I am getting confused. Can i just do the following line on the IPod: gcc -Wall -c Myapp.c gcc Myapp.o -o Myapp or do i have to inlcude the UI libraries as well?