On Dec 30, 2007 9:11 AM, Eswar K <kja.eswar@gmail.com> wrote:

Hi,

I am a newbie to Boost. I am writing a sample code using the Boost libaries and am getting the following error during linking.

Command Line Usage

g++ -I /usr/include/boost/ example.cpp -o example.o

Shouldn't this be something like g++ -L /usr/include/boost/ -lboost_program_options example.cpp -o example.o [substitute the name of the program options library on your system for boost_program_options] Chris

Try adding -lboost_program_options to the g++ command line options. /Mikko Eswar K wrote:

Hi,

I am a newbie to Boost. I am writing a sample code using the Boost libaries and am getting the following error during linking.

_*Command Line Usage *_ * */g++ -I /usr/include/boost/ example.cpp -o example.o/

_*Code*_

/#include <boost/lambda/lambda.hpp> #include <iostream> #include <iterator> #include <algorithm> #include <boost/program_options/options_description.hpp> #include <boost/program_options/positional_options.hpp> #include <boost/program_options/variables_map.hpp> #include <boost/program_options/parsers.hpp>

#include <cstdlib> #include <iostream> #include <iomanip> #include <map> #include <string>

using namespace boost::program_options; //namespace po = boost::program_options;

int main() { using namespace boost::lambda; // using namespace boost::program_options; typedef std::istream_iterator<int> in;

std::for_each( in(std::cin), in(), std::cout << (_1 * 3) << " " ); option_description opts; } / _*Error Message*_

/tmp/ccO0HWa7.o(.text+0xb0): In function `main': example.cpp: undefined reference to `boost::program_options::option_description::option_description()' /tmp/ccO0HWa7.o(.text+0xbf): example.cpp: undefined reference to `boost::program_options::option_description::~option_description()' collect2: ld returned 1 exit status

$LD_LIBRARY_PATH has the following value set. /home/suhas/boost/lib:/usr/lib:/usr/include/boost/

I am stuck, any help will be really appreciated.

Thanks in advance.

Regards, Eswar

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