Undefined Reference[USRP] [UHD] - c++

Question

Ive been trying to compile a code given in the following website to create an USRP Object
https://kb.ettus.com/Getting_Started_with_UHD_and_C%2B%2B
For the lazy ill just include the code:
#include <uhd/utils/thread_priority.hpp>
#include <uhd/utils/safe_main.hpp>
#include <uhd/usrp/multi_usrp.hpp>
#include <uhd/exception.hpp>
#include <uhd/types/tune_request.hpp>
#include <boost/program_options.hpp>
#include <boost/format.hpp>
#include <boost/thread.hpp>
#include <iostream>
int UHD_SAFE_MAIN(int argc, char *argv[]) {
uhd::set_thread_priority_safe();
std::string device_args("addr=192.168.10.2");
std::string subdev("A:0");
std::string ant("TX/RX");
std::string ref("internal");
double rate(1e6);
double freq(915e6);
double gain(10);
double bw(1e6);
//create a usrp device
std::cout << std::endl;
std::cout << boost::format("Creating the usrp device with: %s...") % device_args << std::endl;
uhd::usrp::multi_usrp::sptr usrp = uhd::usrp::multi_usrp::make(device_args);
// Lock mboard clocks
std::cout << boost::format("Lock mboard clocks: %f") % ref << std::endl;
usrp->set_clock_source(ref);
//always select the subdevice first, the channel mapping affects the other settings
std::cout << boost::format("subdev set to: %f") % subdev << std::endl;
usrp->set_rx_subdev_spec(subdev);
std::cout << boost::format("Using Device: %s") % usrp->get_pp_string() << std::endl;
//set the sample rate
if (rate <= 0.0) {
std::cerr << "Please specify a valid sample rate" << std::endl;
return ~0;
}
// set sample rate
std::cout << boost::format("Setting RX Rate: %f Msps...") % (rate / 1e6) << std::endl;
usrp->set_rx_rate(rate);
std::cout << boost::format("Actual RX Rate: %f Msps...") % (usrp->get_rx_rate() / 1e6) << std::endl << std::endl;
// set freq
std::cout << boost::format("Setting RX Freq: %f MHz...") % (freq / 1e6) << std::endl;
uhd::tune_request_t tune_request(freq);
usrp->set_rx_freq(tune_request);
std::cout << boost::format("Actual RX Freq: %f MHz...") % (usrp->get_rx_freq() / 1e6) << std::endl << std::endl;
// set the rf gain
std::cout << boost::format("Setting RX Gain: %f dB...") % gain << std::endl;
usrp->set_rx_gain(gain);
std::cout << boost::format("Actual RX Gain: %f dB...") % usrp->get_rx_gain() << std::endl << std::endl;
// set the IF filter bandwidth
std::cout << boost::format("Setting RX Bandwidth: %f MHz...") % (bw / 1e6) << std::endl;
usrp->set_rx_bandwidth(bw);
std::cout << boost::format("Actual RX Bandwidth: %f MHz...") % (usrp->get_rx_bandwidth() / 1e6) << std::endl << std::endl;
// set the antenna
std::cout << boost::format("Setting RX Antenna: %s") % ant << std::endl;
usrp->set_rx_antenna(ant);
std::cout << boost::format("Actual RX Antenna: %s") % usrp->get_rx_antenna() << std::endl << std::endl;
return EXIT_SUCCESS;
}
I at first was utilizing GCC compiler via Code Blocks then decided to test gcc and g++ with MinGW
via command lines, both at the time of compiling resulted in this:
main.cpp:17: undefined reference to `_imp___ZN3uhd24set_thread_priority_safeEfb'
main.cpp:32: undefined reference to `_imp___ZN3uhd13device_addr_tC1ERKSs'
main.cpp:32: undefined reference to `_imp___ZN3uhd4usrp10multi_usrp4makeERKNS_13device_addr_tE'
main.cpp:40: undefined reference to `_imp___ZN3uhd4usrp13subdev_spec_tC1ERKSs'
main.cpp:56: undefined reference to `_imp___ZN3uhd14tune_request_tC1Ed'
obj\Debug\main.o: In function `ZN3uhd4usrp10multi_usrp11set_rx_gainEdj':
multi_usrp.hpp:595: undefined reference to `_imp___ZN3uhd4usrp10multi_usrp9ALL_GAINSE'
obj\Debug\main.o: In function `ZN3uhd4usrp10multi_usrp11get_rx_gainEj':
multi_usrp.hpp:637: undefined reference to `_imp___ZN3uhd4usrp10multi_usrp9ALL_GAINSE'
collect2.exe: error: ld returned 1 exit status
I read about linking the lib files to the project but the API i downloaded dont seem to have any .lib, .a or any other lib type files. I downloaded it from their website, http://files.ettus.com/manual/page_install.html.
Any kind of help would be tremendously appreciated, i've been trying to figure out what the issue is for hours. As a note, im working on Windows 10 OS.

Answer 1

Those are all simply linker errors saying that, hey, you have to add the linker libraries.
I don't know what exactly you've downloaded, but the Windows installers should come with the .lib and .dlls necessary for linking under windows. otherwise, if you've dowloaded the source code, you'd have to follow the manual to build UHD on windows, and add the resulting library to your linking list.

Answer 2

Are you using the -luhd option in your command line when compiling?
If you installed uhd, most probably, you already have the library correctly added to the include path and adding that option will fix the problem.
So the g++ line should look like:
g++ my_file.cpp -o program_name -luhd