Build fails every time

I have done every step as you did in the video, but this error happens:

**cMake:**

> C:\Users\Administrator\Downloads\bgslibrary2_java_opencv320_x64 (1)\wrapper_java
> \build_cmake>cmake -DOpenCV_DIR=%OpenCV_DIR% -G "Visual Studio 14 Win64" ..
> -- The C compiler identification is MSVC 19.0.24215.1
> -- The CXX compiler identification is MSVC 19.0.24215.1
> -- Check for working C compiler: C:/Program Files (x86)/Microsoft Visual Studio
> 14.0/VC/bin/x86_amd64/cl.exe
> -- Check for working C compiler: C:/Program Files (x86)/Microsoft Visual Studio
> 14.0/VC/bin/x86_amd64/cl.exe -- works
> -- Detecting C compiler ABI info
> -- Detecting C compiler ABI info - done
> -- Check for working CXX compiler: C:/Program Files (x86)/Microsoft Visual Studi
> o 14.0/VC/bin/x86_amd64/cl.exe
> -- Check for working CXX compiler: C:/Program Files (x86)/Microsoft Visual Studi
> o 14.0/VC/bin/x86_amd64/cl.exe -- works
> -- Detecting CXX compiler ABI info
> -- Detecting CXX compiler ABI info - done
> -- Detecting CXX compile features
> -- Detecting CXX compile features - done
> -- Found JNI: C:/Program Files/Java/jdk1.8.0_101/lib/jawt.lib
> -- JNI_INCLUDE_DIRS=C:/Program Files/Java/jdk1.8.0_101/include;C:/Program Files/
> Java/jdk1.8.0_101/include/win32;C:/Program Files/Java/jdk1.8.0_101/include
> -- JNI_LIBRARIES=C:/Program Files/Java/jdk1.8.0_101/lib/jawt.lib;C:/Program File
> s/Java/jdk1.8.0_101/lib/jvm.lib
> -- OpenCV ARCH: x64
> -- OpenCV RUNTIME: vc14
> -- OpenCV STATIC: OFF
> -- Found OpenCV: F:/extra/opencv/build (found version "3.2.0")
> -- Found OpenCV 3.2.0 in F:/extra/opencv/build/x64/vc14/lib
> -- You might need to add F:\extra\opencv\build\x64\vc14\bin to your PATH to be a
> ble to run your applications.
> -- OpenCV library status:
> -- version: 3.2.0
> -- libraries: opencv_calib3d;opencv_core;opencv_features2d;opencv_flann;open
> cv_highgui;opencv_imgcodecs;opencv_imgproc;opencv_ml;opencv_objdetect;opencv_pho
> to;opencv_shape;opencv_stitching;opencv_superres;opencv_video;opencv_videoio;ope
> ncv_videostab;opencv_world
> -- include path: F:/extra/opencv/build/include;F:/extra/opencv/build/include
> /opencv
> You have called ADD_LIBRARY for library libbgs without any source files. This ty
> pically indicates a problem with your CMakeLists.txt file
> -- Configuring done
> CMake Error: CMake can not determine linker language for target: libbgs
> -- Generating done
> -- Build files have been written to: C:/Users/Administrator/Downloads/bgslibrary
> 2_java_opencv320_x64 (1)/wrapper_java/build_cmake
>
> C:\Users\Administrator\Downloads\bgslibrary2_java_opencv320_x64 (1)\wrapper_java
> \build_cmake>

**Visual Studio:**

> 1>------ Build started: Project: ZERO_CHECK, Configuration: Debug x64 ------
> 1> Checking Build System
> 1> CMake does not need to re-run because C:/Users/Administrator/Downloads/bgslibrary2_java_opencv320_x64 (1)/wrapper_java/build_cmake/CMakeFiles/generate.stamp is up-to-date.
> 2>------ Build started: Project: libbgs_java_module, Configuration: Debug x64 ------
> 2>C:\Program Files (x86)\MSBuild\14.0\bin\Microsoft.Common.CurrentVersion.targets(1611,5): warning : The referenced project 'C:/Users/Administrator/Downloads/bgslibrary2_java_opencv320_x64 (1)/wrapper_java/build_cmake/libbgs.vcxproj' does not exist.
> 2> Building Custom Rule C:/Users/Administrator/Downloads/bgslibrary2_java_opencv320_x64 (1)/wrapper_java/CMakeLists.txt
> 2> CMake does not need to re-run because C:\Users\Administrator\Downloads\bgslibrary2_java_opencv320_x64 (1)\wrapper_java\build_cmake\CMakeFiles\generate.stamp is up-to-date.
> 2> bgslibrary_java_module.cpp
> 2>F:\extra\opencv\build\include\opencv2/core/mat.hpp(2586): warning C4819: The file contains a character that cannot be represented in the current code page (936). Save the file in Unicode format to prevent data loss
> 2>F:\extra\opencv\build\include\opencv2/core/persistence.hpp : warning C4819: The file contains a character that cannot be represented in the current code page (936). Save the file in Unicode format to prevent data loss
> 2>F:\extra\opencv\build\include\opencv2/core/utility.hpp : warning C4819: The file contains a character that cannot be represented in the current code page (936). Save the file in Unicode format to prevent data loss
> 2>F:\extra\opencv\build\include\opencv2/core/utility.hpp : warning C4819: The file contains a character that cannot be represented in the current code page (936). Save the file in Unicode format to prevent data loss
> 2>f:\extra\opencv\build\include\opencv2\flann\logger.h(66): warning C4996: 'fopen': This function or variable may be unsafe. Consider using fopen_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
> 2> C:\Program Files (x86)\Windows Kits\10\Include\10.0.10240.0\ucrt\stdio.h(205): note: see declaration of 'fopen'
> 2>F:\extra\opencv\build\include\opencv2/imgproc.hpp(592): warning C4819: The file contains a character that cannot be represented in the current code page (936). Save the file in Unicode format to prevent data loss
> 2>c:\users\administrator\downloads\bgslibrary2_java_opencv320_x64 (1)\wrapper_java\bgslibrary_java_module.hpp(25): fatal error C1083: Cannot open include file: '../package_bgs/bgslibrary.h': No such file or directory
> 3>------ Build started: Project: ALL_BUILD, Configuration: Debug x64 ------
> 3>C:\Program Files (x86)\MSBuild\14.0\bin\Microsoft.Common.CurrentVersion.targets(1611,5): warning : The referenced project 'C:/Users/Administrator/Downloads/bgslibrary2_java_opencv320_x64 (1)/wrapper_java/build_cmake/libbgs.vcxproj' does not exist.
> 3> Building Custom Rule C:/Users/Administrator/Downloads/bgslibrary2_java_opencv320_x64 (1)/wrapper_java/CMakeLists.txt
> 3> CMake does not need to re-run because C:\Users\Administrator\Downloads\bgslibrary2_java_opencv320_x64 (1)\wrapper_java\build_cmake\CMakeFiles\generate.stamp is up-to-date.
> ========== Build: 2 succeeded, 1 failed, 0 up-to-date, 0 skipped ==========