GCC Version for Compiling on Ludo

[tparkerd]

The suggested means to compile on Ludo does not work. The version of GCC doesn't seem to like the argument parser.

Error message

root@ludo:/opt/xrcap# g++ -o xrcap/lib/rootCrownSegmentation xrcap/rootCrownSegmentation.cpp -lopencv_highgui -lopencv_imgcodecs -lopencv_imgproc -lopencv_core -lboost_system -lboost_filesystem -lboost_program_options
xrcap/rootCrownSegmentation.cpp: In function ‘int main(int, char**)’:
xrcap/rootCrownSegmentation.cpp:443:8: error: ‘args’ does not name a type
   auto args = po::command_line_parser(argc, argv)
        ^
xrcap/rootCrownSegmentation.cpp:449:13: error: ‘args’ was not declared in this scope
   po::store(args, vm);
             ^
xrcap/rootCrownSegmentation.cpp:491:63: error: ‘to_string’ was not declared in this scope
   cout << "Soil removal flag\t" << to_string(soil_removal_flag) << endl;
                                                               ^

The following command works instead, please update the troubleshooting documentation and consider adding a note in the installation guide for Ludo specifically (Ubuntu 16.04 LTS)

g++-7 -o xrcap/lib/rootCrownSegmentation xrcap/rootCrownSegmentation.cpp -lopencv_highgui -lopencv_imgcodecs -lopencv_imgproc -lopencv_core -lboost_system -lboost_filesystem -lboost_program_options