Help setting up SDL on Windows 10

Hello, currently I’m setting up SDL 2.0 for CLion on Windows 10 64-bit. I’ve gotten very far since the start, and right no I can even compile the code, now I only have issues with the SDL_VIDEODRIVER.

I set the variable to “windows”, but it gives me the error that it cannot find it. I also tried with “directx” and that doesn’t work either. I don’t know what to do now. I’m using the Cygwin64 toolchain.