Trying to build explore_lite in ROS melodic
I'm trying to build the ROS melodic branch of explore_lite. I get this error:
Errors << multirobot_map_merge:make /home/philip/catkin_ws/logs/multirobot_map_merge/build.make.000.log
In file included from /home/philip/catkin_ws/src/m-explore/map_merge/src/combine_grids/merging_pipeline.cpp:46:0:
/home/philip/catkin_ws/src/m-explore/map_merge/src/combine_grids/estimation_internal.h: In function ‘cv::Ptr<cv::Feature2D> combine_grids::internal::chooseFeatureFinder(combine_grids::FeatureType)’:
/home/philip/catkin_ws/src/m-explore/map_merge/src/combine_grids/estimation_internal.h:68:14: error: ‘xfeatures2d’ has not been declared
return xfeatures2d::SURF::create();
What dependency am I missing?