[RushAHead]

We do C++, but it's still in Eclipse.

Did you export your code to Eclipse or copy in the code from a separate file? I had an issue earlier today with an imported file being corrupt and not recognizing anything (also refusing to even consider building), so I copied and pasted into a new project created from a random WPI-provided sample project.

In the new file, make sure your includes follow actual paths. You'll probably have to comment out/ remove the "#include <opencv2/contrib/contrib.hpp" unless you can find the folder. I was unable to, and commenting it out seems to have worked.