Eclipse CDT: removing non-existent include paths

It seems that Eclipse CDT doesn't like it when you have a non-existent path in the list of project include paths. Fair enough. You can selectively remove the non-existent paths from your project via some mouse-clicking.

But if you are generating your Eclipse project via, say, CMake and you're unfortunate enough that you can't reasonably change the CMake project files (think of evil upstream and you not wanting to patch their overly complex build system changing with every release), what do you do? After a bunch of project regenerations removing of the include paths by hand becomes annoying.

As I was experiencing this issue, I decided to hack together an Eclipse plugin to resolve this for me. And here is the result: fixincludes Eclipse CDT plugin.