#include <X11/Xlib.h>
#include <X11/Xutil.h>
Error: cannot find these files

You give no instructions on how to set this project up.

What dependencies are needed?

What version of opencv is this compatible with?

I install opencv, try to make, and get a ton of errors.

How to make work?

I see two unfamiliar header files;

# include <X11/Xlib.h>
# include <X11/Xutil.h>

What are they? I never seen in OpenCV.

Below are the errors faced while running the make command.Pls help resolve the issues

ashok@ashok:~/Downloads/OpenCVHandGuesture-master$ make
rm -rf a.out
g++ pkg-config --libs opencv -lX11 main.cpp
/tmp/cc3ht5yT.o: In function mouseClick()': main.cpp:(.text+0x498): undefined reference toXOpenDisplay'
main.cpp:(.text+0x58d): undefined reference to XQueryPointer' main.cpp:(.text+0x627): undefined reference toXQueryPointer'
main.cpp:(.text+0x658): undefined reference to XSendEvent' main.cpp:(.text+0x68c): undefined reference toXFlush'
main.cpp:(.text+0x69b): undefined reference to XCloseDisplay' /tmp/cc3ht5yT.o: In functionmouseRelease()':
main.cpp:(.text+0x6e0): undefined reference to XOpenDisplay' main.cpp:(.text+0x7cb): undefined reference toXQueryPointer'
main.cpp:(.text+0x865): undefined reference to XQueryPointer' main.cpp:(.text+0x8a7): undefined reference toXSendEvent'
main.cpp:(.text+0x8db): undefined reference to XFlush' main.cpp:(.text+0x8ea): undefined reference toXCloseDisplay'
/tmp/cc3ht5yT.o: In function mouseTo(int, int)': main.cpp:(.text+0x919): undefined reference toXOpenDisplay'
main.cpp:(.text+0x977): undefined reference to XWarpPointer' main.cpp:(.text+0x987): undefined reference toXFlush'
main.cpp:(.text+0x993): undefined reference to XCloseDisplay' /tmp/cc3ht5yT.o: In functionmain':
main.cpp:(.text+0xa10): undefined reference to cv::VideoCapture::VideoCapture(int)' main.cpp:(.text+0xa1f): undefined reference tocv::BackgroundSubtractorMOG2::BackgroundSubtractorMOG2()'
main.cpp:(.text+0xa38): undefined reference to cv::Algorithm::set(char const*, int)' main.cpp:(.text+0xa51): undefined reference tocv::Algorithm::set(char const_, bool)'
main.cpp:(.text+0xa8f): undefined reference to cv::namedWindow(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, int)' main.cpp:(.text+0xaeb): undefined reference tocv::namedWindow(std::__cxx11::basic_string<char, std::char_traits, std::allocator > const&, int)'
main.cpp:(.text+0xb27): undefined reference to cv::VideoCapture::operator>>(cv::Mat&)' main.cpp:(.text+0xb5f): undefined reference tocv::_OutputArray::_OutputArray(cv::Mat&)'
main.cpp:(.text+0xb78): undefined reference to cv::_InputArray::_InputArray(cv::Mat const&)' main.cpp:(.text+0xba0): undefined reference tocv::BackgroundSubtractorMOG2::operator()(cv::_InputArray const&, cv::_OutputArray const&, double)'
main.cpp:(.text+0xbc2): undefined reference to cv::_OutputArray::_OutputArray(cv::Mat&)' main.cpp:(.text+0xbdb): undefined reference tocv::_InputArray::_InputArray(cv::Mat const&)'
main.cpp:(.text+0xbff): undefined reference to cv::BackgroundSubtractorMOG2::operator()(cv::_InputArray const&, cv::_OutputArray const&, double)' main.cpp:(.text+0xc18): undefined reference tocv::_OutputArray::_OutputArray(cv::Mat&)'
main.cpp:(.text+0xc31): undefined reference to cv::BackgroundSubtractorMOG2::getBackgroundImage(cv::_OutputArray const&) const' main.cpp:(.text+0xc81): undefined reference tocv::_InputArray::_InputArray(cv::Mat const&)'
main.cpp:(.text+0xc9a): undefined reference to cv::_OutputArray::_OutputArray(cv::Mat&)' main.cpp:(.text+0xcb3): undefined reference tocv::_InputArray::_InputArray(cv::Mat const&)'
main.cpp:(.text+0xcef): undefined reference to cv::erode(cv::_InputArray const&, cv::_OutputArray const&, cv::_InputArray const&, cv::Point_<int>, int, int, cv::Scalar_<double> const&)' main.cpp:(.text+0xd52): undefined reference to cv::_InputArray::_InputArray(cv::Mat const&)'
main.cpp:(.text+0xd6b): undefined reference tocv::_OutputArray::_OutputArray(cv::Mat&)' main.cpp:(.text+0xd84): undefined reference to cv::_InputArray::_InputArray(cv::Mat const&)'
main.cpp:(.text+0xdc0): undefined reference tocv::dilate(cv::_InputArray const&, cv::_OutputArray const&, cv::_InputArray const&, cv::Point_<int>, int, int, cv::Scalar_<double> const&)' main.cpp:(.text+0xe14): undefined reference to cv::_OutputArray::_OutputArray(cv::Mat&)'
main.cpp:(.text+0xe3e): undefined reference tocv::findContours(cv::_OutputArray const&, cv::_OutputArray const&, int, int, cv::Point_<int>)' main.cpp:(.text+0xeb2): undefined reference to cv::contourArea(cv::_InputArray const&, bool)'
main.cpp:(.text+0xf18): undefined reference tocv::noArray()' main.cpp:(.text+0xf74): undefined reference to cv::OutputArray::OutputArray(cv::Mat&)'
main.cpp:(.text+0xfb7): undefined reference tocv::drawContours(cv::_OutputArray const&, cv::_InputArray const&, int, cv::Scalar_<double> const&, int, int, cv::_InputArray const&, int, cv::Point_<int>)' main.cpp:(.text+0x10e7): undefined reference to cv::InputArray::InputArray(cv::Mat const&)'
main.cpp:(.text+0x1107): undefined reference tocv::convexHull(cv::_InputArray const&, cv::_OutputArray const&, bool, bool)' main.cpp:(.text+0x1186): undefined reference to cv::InputArray::InputArray(cv::Mat const&)'
main.cpp:(.text+0x11a6): undefined reference tocv::convexHull(cv::_InputArray const&, cv::_OutputArray const&, bool, bool)' main.cpp:(.text+0x11c9): undefined reference to cv::noArray()'
main.cpp:(.text+0x1225): undefined reference tocv::_OutputArray::_OutputArray(cv::Mat&)' main.cpp:(.text+0x1268): undefined reference to cv::drawContours(cv::OutputArray const&, cv::InputArray const&, int, cv::Scalar const&, int, int, cv::InputArray const&, int, cv::Point)'
main.cpp:(.text+0x12b3): undefined reference to cv::_InputArray::_InputArray(cv::Mat const&)' main.cpp:(.text+0x12cc): undefined reference tocv::minAreaRect(cv::InputArray const&)'
main.cpp:(.text+0x1354): undefined reference to cv::RotatedRect::points(cv::Point_<float>_) const' main.cpp:(.text+0x143d): undefined reference to cv::line(cv::Mat&, cv::Point, cv::Point, cv::Scalar const&, int, int, int)'
main.cpp:(.text+0x14e7): undefined reference tocv::convexityDefects(cv::_InputArray const&, cv::_InputArray const&, cv::_OutputArray const&)' main.cpp:(.text+0x1ced): undefined reference to cv::circle(cv::Mat&, cv::Point, int, cv::Scalar const&, int, int, int)'
main.cpp:(.text+0x1d8e): undefined reference to cv::circle(cv::Mat&, cv::Point_<int>, int, cv::Scalar_<double> const&, int, int, int)' main.cpp:(.text+0x231b): undefined reference tocv::line(cv::Mat&, cv::Point, cv::Point, cv::Scalar const&, int, int, int)'
main.cpp:(.text+0x2535): undefined reference to cv::putText(cv::Mat&, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, cv::Point_<int>, int, double, cv::Scalar_<double>, int, int, bool)' main.cpp:(.text+0x2570): undefined reference tocv::_InputArray::_InputArray(cv::Mat const&)'
main.cpp:(.text+0x25b3): undefined reference to cv::imshow(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, cv::_InputArray const&)' main.cpp:(.text+0x25ea): undefined reference tocv::_InputArray::_InputArray(cv::Mat const&)'
main.cpp:(.text+0x262d): undefined reference to cv::imshow(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, cv::_InputArray const&)' main.cpp:(.text+0x2655): undefined reference tocv::waitKey(int)'
main.cpp:(.text+0x2698): undefined reference to cv::BackgroundSubtractorMOG2::~BackgroundSubtractorMOG2()' main.cpp:(.text+0x26a7): undefined reference tocv::VideoCapture::~VideoCapture()'
main.cpp:(.text+0x2978): undefined reference to cv::BackgroundSubtractorMOG2::~BackgroundSubtractorMOG2()' main.cpp:(.text+0x298c): undefined reference tocv::VideoCapture::~VideoCapture()'
/tmp/cc3ht5yT.o: In function cv::Mat::~Mat()': main.cpp:(.text._ZN2cv3MatD2Ev[_ZN2cv3MatD5Ev]+0x39): undefined reference tocv::fastFree(void*)'
/tmp/cc3ht5yT.o: In function cv::Mat::release()': main.cpp:(.text._ZN2cv3Mat7releaseEv[_ZN2cv3Mat7releaseEv]+0x47): undefined reference tocv::Mat::deallocate()'
/tmp/cc3ht5yT.o: In function cv::_InputArray::_InputArray<int>(std::vector<int, std::allocator<int> > const&)': main.cpp:(.text._ZN2cv11_InputArrayC2IiEERKSt6vectorIT_SaIS3_EE[_ZN2cv11_InputArrayC5IiEERKSt6vectorIT_SaIS3_EE]+0x11): undefined reference tovtable for cv::_InputArray'
/tmp/cc3ht5yT.o: In function cv::_OutputArray::_OutputArray<cv::Point_<int> >(std::vectorstd::vector<cv::Point_<int, std::allocatorcv::Point_<int > >, std::allocatorstd::vector<cv::Point_<int, std::allocatorcv::Point_<int > > > >&)': main.cpp:(.text._ZN2cv12_OutputArrayC2INS_6Point_IiEEEERSt6vectorIS4_IT_SaIS5_EESaIS7_EE[_ZN2cv12_OutputArrayC5INS_6Point_IiEEEERSt6vectorIS4_IT_SaIS5_EESaIS7_EE]+0x24): undefined reference to vtable for cv::_OutputArray'
/tmp/cc3ht5yT.o: In functioncv::_InputArray::_InputArray<cv::Point_<int> >(std::vectorcv::Point_<int, std::allocatorcv::Point_<int > > const&)': main.cpp:(.text._ZN2cv11_InputArrayC2INS_6Point_IiEEEERKSt6vectorIT_SaIS5_EE[_ZN2cv11_InputArrayC5INS_6Point_IiEEEERKSt6vectorIT_SaIS5_EE]+0x11): undefined reference to vtable for cv::_InputArray'
/tmp/cc3ht5yT.o: In functioncv::_InputArray::_InputArray<cv::Point_<int> >(std::vectorstd::vector<cv::Point_<int, std::allocatorcv::Point_<int > >, std::allocatorstd::vector<cv::Point_<int, std::allocatorcv::Point_<int > > > > const&)': main.cpp:(.text._ZN2cv11_InputArrayC2INS_6Point_IiEEEERKSt6vectorIS4_IT_SaIS5_EESaIS7_EE[_ZN2cv11_InputArrayC5INS_6Point_IiEEEERKSt6vectorIS4_IT_SaIS5_EESaIS7_EE]+0x11): undefined reference to vtable for cv::_InputArray'
/tmp/cc3ht5yT.o: In functioncv::Mat::Mat<cv::Point_<int> >(std::vectorcv::Point_<int, std::allocatorcv::Point_<int > > const&, bool)': main.cpp:(.text._ZN2cv3MatC2INS_6Point_IiEEEERKSt6vectorIT_SaIS5_EEb[_ZN2cv3MatC5INS_6Point_IiEEEERKSt6vectorIT_SaIS5_EEb]+0x20d): undefined reference to cv::_OutputArray::_OutputArray(cv::Mat&)'
main.cpp:(.text._ZN2cv3MatC2INS_6Point_IiEEEERKSt6vectorIT_SaIS5_EEb[ZN2cv3MatC5INS_6Point_IiEEEERKSt6vectorIT_SaIS5_EEb]+0x26a): undefined reference tocv::Mat::copyTo(cv::_OutputArray const&) const' /tmp/cc3ht5yT.o: In function cv::OutputArray::OutputArray<cv::Point >(std::vectorcv::Point<int, std::allocatorcv::Point >&)':
main.cpp:(.text._ZN2cv12_OutputArrayC2INS_6Point_IiEEEERSt6vectorIT_SaIS5_EE[_ZN2cv12_OutputArrayC5INS_6Point_IiEEEERSt6vectorIT_SaIS5_EE]+0x24): undefined reference to vtable for cv::_OutputArray' /tmp/cc3ht5yT.o: In functioncv::_OutputArray::_OutputArray(std::vector<int, std::allocator >&)':
main.cpp:(.text._ZN2cv12_OutputArrayC2IiEERSt6vectorIT_SaIS3_EE[_ZN2cv12_OutputArrayC5IiEERSt6vectorIT_SaIS3_EE]+0x24): undefined reference to vtable for cv::_OutputArray' /tmp/cc3ht5yT.o: In functioncv::_OutputArray::_OutputArray<cv::Vec<int, 4> >(std::vector<cv::Vec<int, 4>, std::allocator<cv::Vec<int, 4> > >&)':
main.cpp:(.text._ZN2cv12_OutputArrayC2INS_3VecIiLi4EEEEERSt6vectorIT_SaIS5_EE[_ZN2cv12_OutputArrayC5INS_3VecIiLi4EEEEERSt6vectorIT_SaIS5_EE]+0x24): undefined reference to vtable for cv::_OutputArray' /tmp/cc3ht5yT.o: In functioncv::_InputArray::_InputArray<cv::Vec<int, 4> >(std::vector<cv::Vec<int, 4>, std::allocator<cv::Vec<int, 4> > > const&)':
main.cpp:(.text._ZN2cv11_InputArrayC2INS_3VecIiLi4EEEEERKSt6vectorIT_SaIS5_EE[_ZN2cv11_InputArrayC5INS_3VecIiLi4EEEEERKSt6vectorIT_SaIS5_EE]+0x11): undefined reference to `vtable for cv::_InputArray'
collect2: error: ld returned 1 exit status
Makefile:2: recipe for target 'all' failed
make: *** [all] Error 1