ICM 20648 SDK with Eclipse

Greetings
I want to integrate the ICM 20648 in to a preexisting project that was made using eclipse. As a first step I would like to get the SDK running on eclipse with everything else staying the same. I used the IAR plugin to import the project and defined the required symbols and additional include directories. Unfortunatly I can build an debug the project but the print function doesn't work(nothing sent over uart) and it gets stuck in the mdelay function before reaching the endless loop. Has anyone done anything similar or has any idea what I forgot? TIA