ROSbag c++ boost compiling problems

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Hi folks,

Thanks for looking at my problem. I've been trying to write some code to convert .bags to csv files and have run into some problems. When I make the code, I get a large amount of errors when creating the .o. It's got to be in how I'm linking to the boost libraries...but I'm unskilled in this. My Cmake :

rosbuild_add_boost_directories()
rosbuild_add_executable(rosbag_to_csv src/make_csv.cpp)
rosbuild_link_boost(rosbag_to_csv system )

MY code:

#include <fstream>
#include <time.h>
#include <stdio.h>
#include <string.h>
#include <iostream>
#include <sstream>

#include <ros/ros.h>
#include <rosbag/bag.h>
#include <rosbag/view.h>
#include <boost/foreach.hpp>
#include <std_msgs/Int32.h>

//or just use $ rostopic echo -b file.bag -p /topic

int main(int argc, char *argv[])
{

    if (argc > 1 || argc == 0)
    {
        std::cout << "Too many (or no) arguments........arg= filename.bag";
        return -1;

    }

    std::cout << "Extracting data from: " << argv <<std::endl;

    std::stringstream ss;
    std::string argv_name;
    std::string argv_fullname;
    std::ofstream myfile;
    time_t rawtime;
    struct tm * timeinfo;
    char str_now [80];

    ss << argv;
    ss >> argv_name;
    argv_fullname=argv_name;
    argv_name.erase(argv_name.end()-4,argv_name.end());

    time ( &rawtime );
    timeinfo = localtime ( &rawtime );

  strftime (str_now,80,"%c",timeinfo);

    myfile.open ((argv_name+ ".csv").c_str(), std::ios::out | std::ios::app);
    myfile  << str_now << "," << "ROSBAG decomposition: " << argv_name ;

    rosbag::Bag bag;
    bag.open(argv_fullname, rosbag::bagmode::Read);
    rosbag::View view(bag);

    BOOST_FOREACH(rosbag::MessageInstance const m, view)
    {
        if (m.getTopic() == "/cmd_vel/x")
        {
            std_msgs::Int32::ConstPtr value = m.instantiate<std_msgs::Int32>();
            if (value != NULL)
            {   
                myfile << value->data<< std::endl;
            }
        }//if topic
        //else if (other topics) {}
    }//boost
    bag.close();
    myfile.close();
    return 0;
}//

Errors:

ew>': /usr/include/boost/range/begin.hpp:49: undefined reference to rosbag::View::begin()' CMakeFiles/rosbag_to_csv.dir/src/make_csv.o: In functionauto_any': /usr/include/boost/foreach.hpp:250: undefined reference to rosbag::View::iterator::iterator(rosbag::View::iterator const&)' CMakeFiles/rosbag_to_csv.dir/src/make_csv.o: In functionbegin<rosbag::view, mpl_::bool_<false=""> >': /usr/include/boost/foreach.hpp:650: undefined reference to rosbag::View::iterator::~iterator()' CMakeFiles/rosbag_to_csv.dir/src/make_csv.o: In functionrange_end<rosbag::view>': /usr/include/boost/range/end.hpp:50: undefined reference to rosbag::View::end()' CMakeFiles/rosbag_to_csv.dir/src/make_csv.o: In functionauto_any': /usr/include/boost/foreach.hpp:250: undefined reference to rosbag::View::iterator::iterator(rosbag::View::iterator const&)' CMakeFiles/rosbag_to_csv.dir/src/make_csv.o: In functionend<rosbag::view, mpl_::bool_<false=""> >': /usr/include/boost/foreach.hpp:690: undefined reference to rosbag::View::iterator::~iterator()' CMakeFiles/rosbag_to_csv.dir/src/make_csv.o: In functionincrement<rosbag::view::iterator>': /usr/include/boost/iterator/iterator_facade.hpp:523: undefined reference to rosbag::View::iterator::increment()' CMakeFiles/rosbag_to_csv.dir/src/make_csv.o: In functionequal<rosbag::view::iterator, rosbag::view::iterator="">': /usr/include/boost/iterator/iterator_facade.hpp:535: undefined reference to rosbag::View::iterator::equal(rosbag::View::iterator const&) const' CMakeFiles/rosbag_to_csv.dir/src/make_csv.o: In functiondereference<rosbag::view::iterator>': /usr/include/boost/iterator/iterator_facade.hpp:517: undefined reference to rosbag::View::iterator::dereference() const' CMakeFiles/rosbag_to_csv.dir ... (more)