title: opencv - cmake error : No such file or directory on Ubuntu
body: <p>I have been trying to install opencv from source rather than pip since I could not read a VideoCapture successfully.</p>
  
  <p>Installing <strong>opencv-3.2.0</strong> on <strong>Ubuntu 16.04.3 LTS</strong>. Followed the details mentioned <a href="https://github.com/kratzert/Ubuntu_from_scratch/blob/master/Ubuntu_16_04LTS.md#installing-opencv3" rel="noreferrer">here</a>.</p>
  
  <p>I get the following errors in ".../opencv-3.2.0/build/CMakeFiles/CMakeError.log":</p>
  
  <pre><code>.../opencv-3.2.0/build/CMakeFiles/CMakeTmp/CheckIncludeFile.c:1:28: fatal error: linux/videodev.h: No such file or directory
  
  
  .../opencv-3.2.0/build/CMakeFiles/CMakeTmp/CheckIncludeFile.c:1:25: fatal error: sys/videoio.h: No such file or directory
  </code></pre>
  
  <p><strong>libv4l-dev</strong> is already the newest version (1.10.0-1)</p>
  
  <p>I've also run the following command at <strong>/usr/include/linux</strong>:</p>
  
  <pre><code>sudo ln -s ../libv4l1-videodev.h videodev.h
  </code></pre>
  
  <p>The CMake output is:</p>
  
  <pre><code>-- General configuration for OpenCV 3.2.0 =====================================
  --   Version control:               unknown
  --
  --   Platform:
  --     Timestamp:                   2017-08-09T05:39:43Z
  --     Host:                        Linux 4.4.0-87-generic x86_64
  --     CMake:                       3.5.1
  --     CMake generator:             Unix Makefiles
  --     CMake build tool:            /usr/bin/make
  --     Configuration:               RELEASE
  --
  --   C/C++:
  --     Built as dynamic libs?:      YES
  --     C++ Compiler:                /usr/bin/c++  (ver 5.4.0)
  --     C++ flags (Release):         -fsigned-char -W -Wall -Werror=return-type -Werror=non-virtual-dtor -Werror=address -Werror=sequence-point -Wformat -Werror=format-security -Wmissing-declarations -Wundef -Winit-self -Wpointer-arith -Wshadow -Wsign-promo -Wno-narrowing -Wno-delete-non-virtual-dtor -Wno-comment -fdiagnostics-show-option -Wno-long-long -pthread -fomit-frame-pointer -msse -msse2 -mno-avx -msse3 -mno-ssse3 -mno-sse4.1 -mno-sse4.2 -ffunction-sections -fvisibility=hidden -fvisibility-inlines-hidden -O3 -DNDEBUG  -DNDEBUG
  --     C++ flags (Debug):           -fsigned-char -W -Wall -Werror=return-type -Werror=non-virtual-dtor -Werror=address -Werror=sequence-point -Wformat -Werror=format-security -Wmissing-declarations -Wundef -Winit-self -Wpointer-arith -Wshadow -Wsign-promo -Wno-narrowing -Wno-delete-non-virtual-dtor -Wno-comment -fdiagnostics-show-option -Wno-long-long -pthread -fomit-frame-pointer -msse -msse2 -mno-avx -msse3 -mno-ssse3 -mno-sse4.1 -mno-sse4.2 -ffunction-sections -fvisibility=hidden -fvisibility-inlines-hidden -g  -O0 -DDEBUG -D_DEBUG
  --     C Compiler:                  /usr/bin/cc
  --     C flags (Release):           -fsigned-char -W -Wall -Werror=return-type -Werror=non-virtual-dtor -Werror=address -Werror=sequence-point -Wformat -Werror=format-security -Wmissing-declarations -Wmissing-prototypes -Wstrict-prototypes -Wundef -Winit-self -Wpointer-arith -Wshadow -Wno-narrowing -Wno-comment -fdiagnostics-show-option -Wno-long-long -pthread -fomit-frame-pointer -msse -msse2 -mno-avx -msse3 -mno-ssse3 -mno-sse4.1 -mno-sse4.2 -ffunction-sections -fvisibility=hidden -O3 -DNDEBUG  -DNDEBUG
  --     C flags (Debug):             -fsigned-char -W -Wall -Werror=return-type -Werror=non-virtual-dtor -Werror=address -Werror=sequence-point -Wformat -Werror=format-security -Wmissing-declarations -Wmissing-prototypes -Wstrict-prototypes -Wundef -Winit-self -Wpointer-arith -Wshadow -Wno-narrowing -Wno-comment -fdiagnostics-show-option -Wno-long-long -pthread -fomit-frame-pointer -msse -msse2 -mno-avx -msse3 -mno-ssse3 -mno-sse4.1 -mno-sse4.2 -ffunction-sections -fvisibility=hidden -g  -O0 -DDEBUG -D_DEBUG
  --     Linker flags (Release):
  --     Linker flags (Debug):
  --     ccache:                      NO
  --     Precompiled headers:         YES
  --     Extra dependencies:          /usr/lib/x86_64-linux-gnu/libpng.so /usr/lib/x86_64-linux-gnu/libz.so /usr/lib/x86_64-linux-gnu/libtiff.so /usr/lib/x86_64-linux-gnu/libjasper.so /usr/lib/x86_64-linux-gnu/libjpeg.so gtk-x11-2.0 gdk-x11-2.0 pangocairo-1.0 atk-1.0 cairo gdk_pixbuf-2.0 gio-2.0 pangoft2-1.0 pango-1.0 gobject-2.0 glib-2.0 fontconfig freetype gthread-2.0 avcodec-ffmpeg avformat-ffmpeg avutil-ffmpeg swscale-ffmpeg dl m pthread rt
  --     3rdparty dependencies:       libwebp IlmImf
  --
  --   OpenCV modules:
  --     To be built:                 core flann imgproc ml photo video imgcodecs shape videoio highgui objdetect superres ts features2d calib3d stitching videostab python2 python3
  --     Disabled:                    world
  --     Disabled by dependency:      -
  --     Unavailable:                 cudaarithm cudabgsegm cudacodec cudafeatures2d cudafilters cudaimgproc cudalegacy cudaobjdetect cudaoptflow cudastereo cudawarping cudev java viz
  --
  --   GUI:
  --     QT:                          NO
  --     GTK+ 2.x:                    YES (ver 2.24.30)
  --     GThread :                    YES (ver 2.48.2)
  --     GtkGlExt:                    NO
  --     OpenGL support:              NO
  --     VTK support:                 NO
  --
  --   Media I/O:
  --     ZLib:                        /usr/lib/x86_64-linux-gnu/libz.so (ver 1.2.8)
  --     JPEG:                        /usr/lib/x86_64-linux-gnu/libjpeg.so (ver )
  --     WEBP:                        build (ver 0.3.1)
  --     PNG:                         /usr/lib/x86_64-linux-gnu/libpng.so (ver 1.2.54)
  --     TIFF:                        /usr/lib/x86_64-linux-gnu/libtiff.so (ver 42 - 4.0.6)
  --     JPEG 2000:                   /usr/lib/x86_64-linux-gnu/libjasper.so (ver 1.900.1)
  --     OpenEXR:                     build (ver 1.7.1)
  --     GDAL:                        NO
  --     GDCM:                        NO
  --
  --   Video I/O:
  --     DC1394 1.x:                  NO
  --     DC1394 2.x:                  NO
  --     FFMPEG:                      YES
  --       avcodec:                   YES (ver 56.60.100)
  --       avformat:                  YES (ver 56.40.101)
  --       avutil:                    YES (ver 54.31.100)
  --       swscale:                   YES (ver 3.1.101)
  --       avresample:                NO
  --     GStreamer:                   NO
  --     OpenNI:                      NO
  --     OpenNI PrimeSensor Modules:  NO
  --     OpenNI2:                     NO
  --     PvAPI:                       NO
  --     GigEVisionSDK:               NO
  --     Aravis SDK:                  NO
  --     UniCap:                      NO
  --     UniCap ucil:                 NO
  --     V4L/V4L2:                    YES/YES
  --     XIMEA:                       NO
  --     Xine:                        NO
  --     gPhoto2:                     NO
  --
  --   Parallel framework:            pthreads
  --
  --   Other third-party libraries:
  --     Use IPP:                     9.0.1 [9.0.1]
  --          at:                     /root/twix/tensorflow/opencv-3.2.0/build/3rdparty/ippicv/ippicv_lnx
  --     Use IPP Async:               NO
  --     Use VA:                      NO
  --     Use Intel VA-API/OpenCL:     NO
  --     Use Lapack:                  NO
  --     Use Eigen:                   NO
  --     Use Cuda:                    NO
  --     Use OpenCL:                  YES
  --     Use OpenVX:                  NO
  --     Use custom HAL:              NO
  --
  --   OpenCL:                        &lt;Dynamic loading of OpenCL library&gt;
  --     Include path:                /root/twix/tensorflow/opencv-3.2.0/3rdparty/include/opencl/1.2
  --     Use AMDFFT:                  NO
  --     Use AMDBLAS:                 NO
  --
  --   Python 2:
  --     Interpreter:                 /usr/bin/python2.7 (ver 2.7.12)
  --     Libraries:                   /usr/lib/x86_64-linux-gnu/libpython2.7.so (ver 2.7.12)
  --     numpy:                       /usr/lib/python2.7/dist-packages/numpy/core/include (ver 1.11.0)
  --     packages path:               lib/python2.7/dist-packages
  --
  --   Python 3:
  --     Interpreter:                 /usr/bin/python3 (ver 3.5.2)
  --     Libraries:                   /usr/lib/x86_64-linux-gnu/libpython3.5m.so (ver 3.5.2)
  --     numpy:                       /usr/lib/python3/dist-packages/numpy/core/include (ver 1.11.0)
  --     packages path:               lib/python3.5/dist-packages
  --
  --   Python (for build):            /usr/bin/python2.7
  --
  --   Java:
  --     ant:                         NO
  --     JNI:                         /usr/lib/jvm/java-8-oracle/include /usr/lib/jvm/java-8-oracle/include/linux /usr/lib/jvm/java-8-oracle/include
  --     Java wrappers:               NO
  --     Java tests:                  NO
  --
  --   Matlab:                        Matlab not found or implicitly disabled
  --
  --   Documentation:
  --     Doxygen:                     NO
  --
  --   Tests and samples:
  --     Tests:                       YES
  --     Performance tests:           YES
  --     C/C++ Examples:              YES
  --
  --   Install path:                  /usr/local
  --
  --   cvconfig.h is in:              /root/twix/tensorflow/opencv-3.2.0/build
  --
  -- Configuring incomplete, errors occurred!
  </code></pre>