Vim and CMake Out-of-Source Builds
If you use Vim you probably know you can use the make command to build your project. The make command looks for a Makefile in your current directory. If you are editing a file that is not in the current directory (meaning you use some Vim magic to change to the directory containing your edit buffer), make will start below the top-level of your build directory. This is often the case when doing an out-of-source build with CMake.