wj@wj-Inspiron-:~/Downloads/LBD_Descriptor/build$ cmake ..

-- Configuring done

-- Generating done

-- Build files have been written to: /home/wj/Downloads/LBD_Descriptor/build

wj@wj-Inspiron-:~/Downloads/LBD_Descriptor/build$ make

[ %] Built target LineMatchingLib

Linking CXX executable TestLineMatchingAlgorithm

CMakeFiles/TestLineMatchingAlgorithm.dir/TestLineMatchingAlgorithm.cpp.o: In function `cv::String::String(char const*)':

TestLineMatchingAlgorithm.cpp:(.text._ZN2cv6StringC2EPKc[_ZN2cv6StringC5EPKc]+0x30): undefined reference to `cv::String::allocate(unsigned long)'

CMakeFiles/TestLineMatchingAlgorithm.dir/TestLineMatchingAlgorithm.cpp.o: In function `cv::String::String(std::string const&)':

TestLineMatchingAlgorithm.cpp:(.text._ZN2cv6StringC2ERKSs[_ZN2cv6StringC5ERKSs]+0x34): undefined reference to `cv::String::allocate(unsigned long)'

CMakeFiles/TestLineMatchingAlgorithm.dir/TestLineMatchingAlgorithm.cpp.o: In function `main':

TestLineMatchingAlgorithm.cpp:(.text.startup+0xfe): undefined reference to `cv::imread(cv::String const&, int)'

TestLineMatchingAlgorithm.cpp:(.text.startup+0x12a): undefined reference to `cv::String::deallocate()'

TestLineMatchingAlgorithm.cpp:(.text.startup+0x21e): undefined reference to `cv::imread(cv::String const&, int)'

TestLineMatchingAlgorithm.cpp:(.text.startup+0x24a): undefined reference to `cv::String::deallocate()'

TestLineMatchingAlgorithm.cpp:(.text.startup+0x624): undefined reference to `cv::line(cv::_InputOutputArray const&, cv::Point_<int>, cv::Point_<int>, cv::Scalar_<double> const&, int, int, int)'

TestLineMatchingAlgorithm.cpp:(.text.startup+0x7f3): undefined reference to `cv::line(cv::_InputOutputArray const&, cv::Point_<int>, cv::Point_<int>, cv::Scalar_<double> const&, int, int, int)'

TestLineMatchingAlgorithm.cpp:(.text.startup+0x89d): undefined reference to `cv::imwrite(cv::String const&, cv::_InputArray const&, std::vector<int, std::allocator<int> > const&)'

TestLineMatchingAlgorithm.cpp:(.text.startup+0x8a5): undefined reference to `cv::String::deallocate()'

TestLineMatchingAlgorithm.cpp:(.text.startup+0x939): undefined reference to `cv::imwrite(cv::String const&, cv::_InputArray const&, std::vector<int, std::allocator<int> > const&)'

TestLineMatchingAlgorithm.cpp:(.text.startup+0x941): undefined reference to `cv::String::deallocate()'

TestLineMatchingAlgorithm.cpp:(.text.startup+0xa96): undefined reference to `cv::String::deallocate()'

TestLineMatchingAlgorithm.cpp:(.text.startup+0xac9): undefined reference to `cv::String::deallocate()'

TestLineMatchingAlgorithm.cpp:(.text.startup+0xb53): undefined reference to `cv::String::deallocate()'

TestLineMatchingAlgorithm.cpp:(.text.startup+0xb96): undefined reference to `cv::String::deallocate()'

libLineMatchingLib.so: undefined reference to `cv::error(int, cv::String const&, char const*, char const*, int)'

libLineMatchingLib.so: undefined reference to `cv::write(cv::FileStorage&, cv::String const&, cv::Mat const&)'

libLineMatchingLib.so: undefined reference to `cv::FileStorage::FileStorage(cv::String const&, int, cv::String const&)'

libLineMatchingLib.so: undefined reference to `cv::operator<<(cv::FileStorage&, cv::String const&)'

collect2: error: ld returned  exit status

make[]: *** [TestLineMatchingAlgorithm] Error

make[]: *** [CMakeFiles/TestLineMatchingAlgorithm.dir/all] Error

make: *** [all] Error 

PROJECT(LILIANTESTS)

cmake_minimum_required(VERSION 2.8)

find_package( OpenCV REQUIRED ) //这两句可以连接到opencv

add_executable( camera camera.cpp )

target_link_libraries( camera ${OpenCV_LIBS} )