Hi there,
I’m also very interested in getting Wireguard running on osmc. I’m also stuck with the same error messages as @graza has mentioned above (sys/socket.h: No such file or directory). Tried creating different symbolic links from the existing socket.h files to probably used folders during make process, but still the socket.h can’t be found.
So if someone has hints or ideas how to sole this issue, I would be really grateful.