xfeatures2d is unavailable when builded with VS2015&CV3.1&CMAKE3.5.1

Please help, I know i should not ask a question. But I really feel sick with it.
when I try to build Opencv3.1 with Opencv_Contrib, the module-xfeatures2d is always unavailable.
Did I miss some dependency?
here the log,and thank you:
Could NOT find Doxygen (missing:  DOXYGEN_EXECUTABLE) 
To enable PlantUML support, set PLANTUML_JAR environment variable or pass -DPLANTUML_JAR=<filepath> option to cmake
Traceback (most recent call last):
  File "<string>", line 1, in <module>
ImportError: No module named numpy.distutils

Could NOT find PythonInterp (missing:  PYTHON_EXECUTABLE) (Required is at least version "3.4")
Could NOT find PythonInterp (missing:  PYTHON_EXECUTABLE) (Required is at least version "3.2")
Could NOT find JNI (missing:  JAVA_AWT_LIBRARY JAVA_JVM_LIBRARY JAVA_INCLUDE_PATH JAVA_INCLUDE_PATH2 JAVA_AWT_INCLUDE_PATH) 
Could NOT find Matlab (missing:  MATLAB_MEX_SCRIPT MATLAB_INCLUDE_DIRS MATLAB_ROOT_DIR MATLAB_LIBRARIES MATLAB_LIBRARY_DIRS MATLAB_MEXEXT MATLAB_ARCH MATLAB_BIN) 
VTK is not found. Please set -DVTK_DIR in CMake to VTK build directory, or to VTK install subdirectory with VTKConfig.cmake file
Caffe:   NO
Protobuf:   NO
Glog:   NO
Looking for tiny_dnn.h
Looking for tiny_dnn.h - not found
Performing Test COMPILER_SUPPORTS_CXX11
Performing Test COMPILER_SUPPORTS_CXX11 - Failed
Module opencv_dnn_modern disabled because tiny-dnn was not found
freetype2:   NO
harfbuzz:    NO
No preference for use of exported gflags CMake configuration set, and no hints for include/library directories provided. Defaulting to preferring an installed/exported gflags CMake configuration if available.
Failed to find installed gflags CMake configuration, searching for gflags build directories exported with CMake.
Failed to find an installed/exported CMake configuration for gflags, will perform search for installed gflags components.
Failed to find gflags - Could not find gflags include directory, set GFLAGS_INCLUDE_DIR to directory containing gflags/gflags.h
Failed to find glog - Could not find glog include directory, set GLOG_INCLUDE_DIR to directory containing glog/logging.h
Module opencv_sfm disabled because the following dependencies are not found: Eigen Glog/Gflags
Tesseract:   NO

General configuration for OpenCV 3.1.0 =====================================
  Version control:               unknown

  Platform:
    Host:                        Windows 6.1.7601 AMD64
    CMake:                       3.5.1
    CMake generator:             Visual Studio 14 2015
    CMake build tool:            C:/Program Files (x86)/MSBuild/14.0/bin/MSBuild.exe
    MSVC:                        1900

  C/C++:
    Built as dynamic libs?:      YES
    C++ Compiler:                E:/Application/Work/VisualStudio/VC/bin/cl.exe  (ver 19.0.24215.1)
    C++ flags (Release):         /DWIN32 /D_WINDOWS /W4 /GR /EHa  /D _CRT_SECURE_NO_DEPRECATE /D _CRT_NONSTDC_NO_DEPRECATE /D _SCL_SECURE_NO_WARNINGS /Gy /bigobj /arch:SSE2 /Oi /fp:fast  /wd4251 /wd4324 /wd4275 /wd4589 /MP2  /MD /O2 /Ob2 /D NDEBUG  /Zi
    C++ flags (Debug):           /DWIN32 /D_WINDOWS /W4 /GR /EHa  /D _CRT_SECURE_NO_DEPRECATE /D _CRT_NONSTDC_NO_DEPRECATE /D _SCL_SECURE_NO_WARNINGS /Gy /bigobj /arch:SSE2 /Oi /fp:fast  /wd4251 /wd4324 /wd4275 /wd4589 /MP2  /D_DEBUG /MDd /Zi /Ob0 /Od /RTC1 
    C Compiler:                  E:/Application/Work/VisualStudio/VC/bin/cl.exe
    C flags (Release):           /DWIN32 /D_WINDOWS /W3  /D _CRT_SECURE_NO_DEPRECATE /D _CRT_NONSTDC_NO_DEPRECATE /D _SCL_SECURE_NO_WARNINGS /Gy /bigobj /arch:SSE2 /Oi /fp:fast    /MP2  /MD /O2 /Ob2 /D NDEBUG  /Zi
    C flags (Debug):             /DWIN32 /D_WINDOWS /W3  /D _CRT_SECURE_NO_DEPRECATE /D _CRT_NONSTDC_NO_DEPRECATE /D _SCL_SECURE_NO_WARNINGS /Gy /bigobj /arch:SSE2 /Oi /fp:fast    /MP2  /D_DEBUG /MDd /Zi /Ob0 /Od /RTC1 
    Linker flags (Release):      /machine:X86  /INCREMENTAL:NO  /debug
    Linker flags (Debug):        /machine:X86  /debug /INCREMENTAL 
    Precompiled headers:         YES
    Extra dependencies:          comctl32 gdi32 ole32 setupapi ws2_32 vfw32
    3rdparty dependencies:       zlib libjpeg libwebp libpng libtiff libjasper IlmImf

  OpenCV modules:
    To be built:                 core flann imgproc ml phase_unwrapping photo plot reg surface_matching video xphoto bgsegm fuzzy imgcodecs shape videoio highgui objdetect superres ts xobjdetect bioinspired dpm face features2d line_descriptor saliency text calib3d ccalib datasets rgbd stereo structured_light tracking videostab xfeatures2d ximgproc aruco optflow stitching
    Disabled:                    world contrib_world
    Disabled by dependency:      -
    **Unavailable:                 cudaarithm cudabgsegm cudacodec cudafeatures2d cudafilters cudaimgproc cudalegacy cudaobjdetect cudaoptflow cudastereo cudawarping cudev java python2 python3 viz cnn_3dobj cvv dnn dnn_modern freetype hdf matlab sfm xfeatures2d**

  Windows RT support:            NO

  GUI: 
    QT:                          NO
    Win32 UI:                    YES
    OpenGL support:              NO
    VTK support:                 NO

  Media I/O: 
    ZLib:                        build (ver 1.2.8)
    JPEG:                        build (ver 90)
    WEBP:                        build (ver 0.3.1)
    PNG:                         build (ver 1.6.19)
    TIFF:                        build (ver 42 - 4.0.2)
    JPEG 2000:                   build (ver 1.900.1)
    OpenEXR:                     build (ver 1.7.1)
    GDAL:                        NO

  Video I/O:
    Video for Windows:           YES
    DC1394 1.x:                  NO
    DC1394 2.x:                  NO
    FFMPEG:                      YES (prebuilt binaries)
      codec:                     YES (ver 56.41.100)
      format:                    YES (ver 56.36.101)
      util:                      YES (ver 54.27.100)
      swscale:                   YES (ver 3.1.101)
      resample:                  NO
      gentoo-style:              YES
    GStreamer:                   NO
    OpenNI:                      NO
    OpenNI PrimeSensor Modules:  NO
    OpenNI2:                     NO
    PvAPI:                       NO
    GigEVisionSDK:               NO
    DirectShow:                  YES
    Media Foundation:            NO
    XIMEA:                       NO
    Intel PerC:                  NO

  Parallel framework:            Concurrency

  Other third-party libraries:
    Use IPP:                     IPP not found or implicitly disabled
    Use IPP Async:               NO
    Use Eigen:                   NO
    Use Cuda:                    NO
    Use OpenCL:                  YES
    Use custom HAL:              NO

  OpenCL:
    Version:                     dynamic
    Include path:                E:/AssetsAndLibrary/Opencv31/opencv/sources/3rdparty/include/opencl/1.2
    Use AMDFFT:                  NO
    Use AMDBLAS:                 NO

  Python 2:
    Interpreter:                 E:/Application/Work/Python/python.exe (ver 2.7.13)

  Python 3:
    Interpreter:                 NO

  Python (for build):            E:/Application/Work/Python/python.exe

  Java:
    ant:                         NO
    JNI:                         NO
    Java wrappers:               NO
    Java tests:                  NO

  Matlab:                        Matlab not found or implicitly disabled

  Documentation:
    Doxygen:                     NO
    PlantUML:                    NO

  Tests and samples:
    Tests:                       YES
    Performance tests:           YES
    C/C++ Examples:              NO

  Install path:                  E:/AssetsAndLibrary/Opencv31/opencvciao/install

  cvconfig.h is in:              E:/AssetsAndLibrary/Opencv31/opencvciao
-----------------------------------------------------------------

Configuring done
opencv / opencv_contrib

xfeatures2d is unavailable when builded with VS2015&CV3.1&CMAKE3.5.1 #1113
