This repository is only for tutorials. The SDK binaries needs to be downloaded from HIP RT project page.
Download and extract the binaries so that the file/folder structure inside this 'hiprt' folder looks like:
linux64/
win/
hiprt_common.h
hiprt_device.h
hiprt_libpath.h
hiprt_math.h
hiprt_types.h
hiprt_vec.h
hiprt.h
hiprtew.h