linux - CMake fails when building OpenCV (Ubuntu) -

i'm trying build opencv cmake when build it, stuff goes wrong , have no idea fix it.

so question is: how fix it?

user@bel-pc:~/opencv/build$ cmake -dbuild_shared_libs=off .. -- cxx compiler identification unknown -- c compiler identification gnu -- check working c compiler: /usr/bin/gcc -- check working c compiler: /usr/bin/gcc -- works -- detecting c compiler abi info -- detecting c compiler abi info - done cmake error: cxx compiler: "cmake_cxx_compiler-notfound" not found.   please set cmake_cxx_compiler valid compiler path or name. -- performing test have_cxx_fsigned_char cmake error @ /usr/share/cmake-2.8/modules/cmakecxxinformation.cmake:37 (get_filename_component):   get_filename_component called incorrect number of arguments call stack (most recent call first):   cmakelists.txt:2 (project)   cmake error: cmake_cxx_compiler not set, after enablelanguage cmake error: internal cmake error, trycompile configure of cmake failed -- performing test have_cxx_fsigned_char - failed -- performing test have_c_fsigned_char -- performing test have_c_fsigned_char - success -- looking pthread.h -- looking pthread.h - found -- not find zlib (missing:  zlib_library zlib_include_dir)  -- looking fseeko -- looking fseeko - found -- looking unistd.h -- looking unistd.h - found -- looking sys/types.h -- looking sys/types.h - found -- looking stdint.h -- looking stdint.h - found -- looking stddef.h -- looking stddef.h - found -- check size of off64_t -- check size of off64_t - failed -- not find tiff (missing:  tiff_library tiff_include_dir)  cmake error: cxx compiler: "cmake_cxx_compiler-notfound" not found.   please set cmake_cxx_compiler valid compiler path or name. -- looking assert.h -- looking assert.h - found -- looking fcntl.h -- looking fcntl.h - found -- looking io.h -- looking io.h - not found -- looking jbg_newlen -- looking jbg_newlen - not found -- looking mmap -- looking mmap - found -- looking search.h -- looking search.h - found -- looking string.h -- looking string.h - found -- looking unistd.h -- looking unistd.h - found -- not find jpeg (missing:  jpeg_library jpeg_include_dir)  cmake error: cxx compiler: "cmake_cxx_compiler-notfound" not found.   please set cmake_cxx_compiler valid compiler path or name. -- found jpeg: libjpeg  -- not find jasper (missing:  jasper_library jasper_include_dir)  cmake error: cxx compiler: "cmake_cxx_compiler-notfound" not found.   please set cmake_cxx_compiler valid compiler path or name. -- found zlib: zlib (found version "1.2.7") -- not find png (missing:  png_library png_png_include_dir)  cmake error: cxx compiler: "cmake_cxx_compiler-notfound" not found.   please set cmake_cxx_compiler valid compiler path or name. cmake error: cxx compiler: "cmake_cxx_compiler-notfound" not found.   please set cmake_cxx_compiler valid compiler path or name. -- looking semaphore.h -- looking semaphore.h - found -- checking module 'gtk+-2.0' --   package 'gtk+-2.0' not found -- checking module 'gthread-2.0' --   package 'gthread-2.0' not found -- checking module 'gstreamer-base-0.10' --   package 'gstreamer-base-0.10' not found -- checking module 'libdc1394-2' --   package 'libdc1394-2' not found -- checking module 'libdc1394' --   package 'libdc1394' not found -- checking module 'libv4l1' --   package 'libv4l1' not found -- looking linux/videodev.h -- looking linux/videodev.h - not found -- looking linux/videodev2.h -- looking linux/videodev2.h - found -- looking sys/videoio.h -- looking sys/videoio.h - not found -- checking module 'libavcodec' --   package 'libavcodec' not found -- checking module 'libavformat' --   package 'libavformat' not found -- checking module 'libavutil' --   package 'libavutil' not found -- checking module 'libswscale' --   package 'libswscale' not found -- looking libavformat/avformat.h -- looking libavformat/avformat.h - not found -- looking ffmpeg/avformat.h -- looking ffmpeg/avformat.h - not found cmake error @ /usr/share/cmake-2.8/modules/cmakecxxinformation.cmake:37 (get_filename_component):   get_filename_component called incorrect number of arguments call stack (most recent call first):   cmakelists.txt:2 (project)   cmake error: cmake_cxx_compiler not set, after enablelanguage cmake error: internal cmake error, trycompile configure of cmake failed -- found pythoninterp: /usr/bin/python (found suitable version "2.7.3", required "2.0") -- not find pythonlibs (missing:  python_include_dirs) (required @ least version "2.7.3") traceback (most recent call last):   file "<string>", line 1, in <module> importerror: no module named numpy.distutils -- found apache ant 1.8.2: /usr/bin/ant -- found jni: /usr/lib/jvm/java-6-openjdk/jre/lib/amd64/libjawt.so  -- not find opencl (missing:  opencl_library opencl_include_dir)  cmake error: cxx compiler: "cmake_cxx_compiler-notfound" not found.   please set cmake_cxx_compiler valid compiler path or name. cmake error: cxx compiler: "cmake_cxx_compiler-notfound" not found.   please set cmake_cxx_compiler valid compiler path or name. cmake error: cxx compiler: "cmake_cxx_compiler-notfound" not found.   please set cmake_cxx_compiler valid compiler path or name. cmake error: cxx compiler: "cmake_cxx_compiler-notfound" not found.   please set cmake_cxx_compiler valid compiler path or name. cmake error: cxx compiler: "cmake_cxx_compiler-notfound" not found.   please set cmake_cxx_compiler valid compiler path or name. cmake error: cxx compiler: "cmake_cxx_compiler-notfound" not found.   please set cmake_cxx_compiler valid compiler path or name. cmake error: cxx compiler: "cmake_cxx_compiler-notfound" not found.   please set cmake_cxx_compiler valid compiler path or name. cmake error: cxx compiler: "cmake_cxx_compiler-notfound" not found.   please set cmake_cxx_compiler valid compiler path or name. cmake error: cxx compiler: "cmake_cxx_compiler-notfound" not found.   please set cmake_cxx_compiler valid compiler path or name. cmake error: cxx compiler: "cmake_cxx_compiler-notfound" not found.   please set cmake_cxx_compiler valid compiler path or name. cmake error: cxx compiler: "cmake_cxx_compiler-notfound" not found.   please set cmake_cxx_compiler valid compiler path or name. cmake error: cxx compiler: "cmake_cxx_compiler-notfound" not found.   please set cmake_cxx_compiler valid compiler path or name. cmake error: cxx compiler: "cmake_cxx_compiler-notfound" not found.   please set cmake_cxx_compiler valid compiler path or name. cmake error: cxx compiler: "cmake_cxx_compiler-notfound" not found.   please set cmake_cxx_compiler valid compiler path or name. cmake error: cxx compiler: "cmake_cxx_compiler-notfound" not found.   please set cmake_cxx_compiler valid compiler path or name. cmake error: cxx compiler: "cmake_cxx_compiler-notfound" not found.   please set cmake_cxx_compiler valid compiler path or name. cmake error: cxx compiler: "cmake_cxx_compiler-notfound" not found.   please set cmake_cxx_compiler valid compiler path or name. cmake error: cxx compiler: "cmake_cxx_compiler-notfound" not found.   please set cmake_cxx_compiler valid compiler path or name. cmake error: cxx compiler: "cmake_cxx_compiler-notfound" not found.   please set cmake_cxx_compiler valid compiler path or name. cmake error: cxx compiler: "cmake_cxx_compiler-notfound" not found.   please set cmake_cxx_compiler valid compiler path or name. cmake error: cxx compiler: "cmake_cxx_compiler-notfound" not found.   please set cmake_cxx_compiler valid compiler path or name. cmake error: cxx compiler: "cmake_cxx_compiler-notfound" not found.   please set cmake_cxx_compiler valid compiler path or name. --  -- general configuration opencv 2.4.6.1 ===================================== --   version control:               2.4.6.1-176-g1c55096 --  --   platform: --     host:                        linux 3.5.0-37-generic x86_64 --     cmake:                       2.8.7 --     cmake generator:             unix makefiles --     cmake build tool:            /usr/bin/make --     configuration:               release --  --   c/c++: --     built dynamic libs?:      no --     c++ compiler:                cmake_cxx_compiler-notfound --     c++ flags (release):          --     c++ flags (debug):            --     c compiler:                  /usr/bin/gcc --     c flags (release):           -fsigned-char -o3 -dndebug  --     c flags (debug):             -fsigned-char -g  --     linker flags (release):       --     linker flags (debug):         --     precompiled headers:         no --  --   opencv modules: --     built:                 core imgproc flann highgui features2d calib3d ml video objdetect contrib photo legacy gpu nonfree java stitching superres ts videostab --     disabled:                    world --     disabled dependency:      - --     unavailable:                 androidcamera ocl python --  --   gui:  --     qt:                          no --     gtk+ 2.x:                    no --     gthread :                    no --     gtkglext:                    no --     opengl support:              no --  --   media i/o:  --     zlib:                        zlib (ver 1.2.7) --     jpeg:                        libjpeg (ver 62) --     png:                         build (ver 1.5.12) --     tiff:                        build (ver 42 - 4.0.2) --     jpeg 2000:                   build (ver 1.900.1) --     openexr:                     build (ver 1.7.1) --  --   video i/o: --     dc1394 1.x:                  no --     dc1394 2.x:                  no --     ffmpeg:                      no --       codec:                     no --       format:                    no --       util:                      no --       swscale:                   no --       gentoo-style:              no --     gstreamer:                   no --     openni:                      no --     openni primesensor modules:  no --     pvapi:                       no --     gigevisionsdk:               no --     unicap:                      no --     unicap ucil:                 no --     v4l/v4l2:                    no/yes --     ximea:                       no --     xine:                        no --  --   other third-party libraries: --     use ipp:                     no --     use eigen:                   no --     use tbb:                     no --     use openmp:                  no --     use gcd                      no --     use concurrency              no --     use c=:                      no --     use cuda:                    no --     use opencl:                  no --  --   python: --     interpreter:                 /usr/bin/python (ver 2.7.3) --  --   java: --     ant:                         /usr/bin/ant (ver 1.8.2) --     jni:                         /usr/lib/jvm/jdk1.7.0_21/include /usr/lib/jvm/jdk1.7.0_21/include/linux /usr/lib/jvm/jdk1.7.0_21/include --     java tests:                  yes --  --   documentation: --     build documentation:         no --     sphinx:                      no --     pdflatex compiler:           no --  --   tests , samples: --     tests:                       yes --     performance tests:           yes --     c/c++ examples:              no --  --   install path:                  /usr/local --  --   cvconfig.h in:              /home/user/opencv/build -- ----------------------------------------------------------------- --  -- configuring incomplete, errors occurred! 

thanks hetepeperfan able fix problem. turns out missing c++ compiler.

after running sudo apt-get install build-essential , cleaning build folder , rerunning cmake problem fixed.