some help with DS-5 - Trusted Execution Environment (TEE)

Greetings Experts

I am trying to compile the TEE sample with DS-5. I downloaded the latest version of DS-5, and created a C project. I was able to put in the main_secure.c file and build ok. I then tried to add monitor.s file to the project by adding another source file. I get the following errors:

Would someone please compile the project, and advise in high level what sort of project I need to create and how to import the source files into my project please?

Sean