'std::vector<ClipperLib::IntPoint,std::allocator<_Ty>>' to 'mapnik::geometry::linear_ring<T> &&

[wilhelmberg]

I tried to build NETMapnik today (https://github.com/jbrwn/NET-Mapnik/issues/20#issuecomment-125561422), but got stuck with this error (using mapnik/master and mapnik-vector-tile/master as of today):

Error C2664

'void mapnik::geometry::polygon<T>::set_exterior_ring(mapnik::geometry::linear_ring<T> &&)': 
cannot convert argument 1 from 'std::vector<ClipperLib::IntPoint,std::allocator<_Ty>>' to
'mapnik::geometry::linear_ring<T> &&'

mapnik-vector-tile\src\vector_tile_processor.ipp 850

https://github.com/mapbox/mapnik-vector-tile/blob/master/src/vector_tile_processor.ipp#L850

I've included clipper.cpp|hpp from http://www.angusj.com/delphi/clipper.php as noted next to the include (https://github.com/mapbox/mapnik-vector-tile/blob/master/src/vector_tile_processor.ipp#L30).

But that doesn't seem to be the right one. Also tried the clipper files from mapnik/clipper and node-mapnik, to no avail.

I've also included the headers from protozero and pbf_|common|read|write|.hpp from node-mapnik.

Any hints, which are the right clipper files and on how to make this compile?

Related errors:

[springmeyer]

What is currently needed/expected is:

• the r493-mapnik branch of https://github.com/mapnik/clipper
• these defines: https://github.com/mapbox/mapnik-vector-tile/blob/master/gyp/build.gyp#L8-L12

I recognize this is very obtuse - so I'll ponder how to make it easier in the future. But for now this setup is intentional: the goals are to make it easy to pull in updated clipper revisions quickly / make them easy to test.