I am using Atmel Studio 7 with a Cortex M7 @300mhz. Trying to compile bare metal, read the wiki. Looked at references, set the correct symbols. I used the .c file method and the makefile method with no success. This package is not quite ready for commercial compilers unless you are a programming genius. I am not. I got the compiler errors down to a hand full. Undefined references. If there is any success I will update here. You might want to try uGUI. Much simpler to implement.