Error in CMake interface due to tentative of calling non-existing default constructor

[cdsousa]

Hi, I have been trying to wrap a lib of mine using the CMake interface and I am getting an error about calling non-existing default constructor.

I was able to reduce the issue and reproduce the error in the demo application https://github.com/jclay/cppyy-knearestneighbors-example.
To make the error arise, one simply goes to https://github.com/jclay/cppyy-knearestneighbors-example/blob/master/nearest_neighbors.h#L8 and deletes the default constructor of Point (which is not necessary in the remaining code).
It seems that the error is somehow related to the fact that std::vector<Point> is being used on some code.

I'm happy to provide further info if the error is not reproducible.