[opencv] Error installing OpenCV on Ubuntu 14.04

[davidvelascogarcia]

Trying to install opencv in ubuntu 14.04 PAL distro multiple errors appear doing cmake .. in build dir. Inspecting CMakeError.log, it shows that No such file or directory <ffmpeg/avformat.h>, <sys/videoio.h>, <linux/videodev.h>. However using the command locate headers appear in usr/include. Also with cmake .. this error appear in loop before Configuring incomplete, errors ocurred!

CMake Warning (dev) at cmake/OpenCVPCHSupport.cmake:80 (GET_DIRECTORY_PROPERTY):
  Policy CMP0059 is not set: Do no treat DEFINITIONS as a built-in directory
  property.  Run "cmake --help-policy CMP0059" for policy details.  Use the
  cmake_policy command to set the policy and suppress this warning.
Call Stack (most recent call first):
  cmake/OpenCVPCHSupport.cmake:256 (_PCH_GET_COMPILE_FLAGS)
  cmake/OpenCVPCHSupport.cmake:369 (add_precompiled_header)
  cmake/OpenCVModule.cmake:835 (ocv_add_precompiled_header_to_target)
  cmake/OpenCVModule.cmake:806 (_ocv_add_precompiled_headers)
  cmake/OpenCVModule.cmake:688 (_ocv_create_module)
  cmake/OpenCVModule.cmake:857 (ocv_create_module)
  modules/stitching/CMakeLists.txt:7 (ocv_define_module)
This warning is for project developers.  Use -Wno-dev to suppress it.

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Thanks

[davidvelascogarcia]

Configuring with ccmake..

 CMake Error at cmake/OpenCVDetectCXXCompiler.cmake:89 (math):
   math cannot parse the expression: "*100 + ": syntax error, unexpected
   exp_TIMES, expecting exp_OPENPARENT or exp_NUMBER (1)
 Call Stack (most recent call first):
   CMakeLists.txt:109 (include)

[davidvelascogarcia]

Solved changing gcc and g++ version 7 to 4.9. Related.

[davidvelascogarcia]

Closing issue.