Testing boost::property_tree with a json config

compile.sh

# This fails
# See http://stackoverflow.com/questions/18552427/boost-read-json-and-c11
g++ -std=c++11 ptree_test.cpp -o ptree_test

# This works
g++ ptree_test.cpp -o ptree_test

config.json

{
    "global": {
        "server_name": "Main Housten Server",
        "interfaces": [
            {
                "name": "st1_cam1",
                "enabled": true,
                "type": "ueye",
                "description": "Camera Device 1 - HD Station Left Front Door Y555",
                "config": {
                    "camera_id": 1,
                    "hardware_trigger": 1,
                    "param_file": "/usr/lib64/ueye/param_camera1.par"
                }
            },
            {
                "name": "st1_scan",
                "enabled": true,
                "type": "tcp_listener",
                "description": "Barcode Scanner - Station Left Front Door Y555",
                "config": {
                    "listen_addr": "192.168.201.200",
                    "listen_port": 6000,
                    "EOM_char": "\n"
                }
            }
        ]
    }
}

ptree_test.cpp

#include <boost/property_tree/ptree.hpp>
#include <boost/property_tree/json_parser.hpp>
#include <boost/foreach.hpp>
#include <string>
#include <set>
#include <exception>
#include <iostream>

namespace pt = boost::property_tree;

int main(int argc, char* argv[])
{
    pt::ptree tree;
    pt::read_json("./config.json", tree);

    std::cout << "Global settings: " << std::endl;
    std::cout << "Server name: " + tree.get<std::string>("global.server_name") << std::endl;

    BOOST_FOREACH(pt::ptree::value_type &v, tree.get_child("global.interfaces")) {
        std::cout << "Interface found:" << std::endl;
        std::cout << "============================" << std::endl;
        BOOST_FOREACH(pt::ptree::value_type &k, v.second) {
            if (k.first == "config") {
                std::cout << "Settings:" << std::endl;
                BOOST_FOREACH(pt::ptree::value_type &g, k.second) {
                    std::cout << "> " + g.first + ": " + g.second.data() << std::endl;
                }
            } else {
                std::cout << k.first + ": " + k.second.data() << std::endl;
            }
        }
        std::cout << std::endl << std::endl;
    }

    return 0;
}