title: Error : Cmake can't generate openCV
body: <p>I am trying to instal opencv C++ with codeBlocks in Windows 8 by following this <a href="http://kevinhughes.ca/tutorials/opencv-install-on-windows-with-codeblocks-and-mingw/" rel="nofollow">http://kevinhughes.ca/tutorials/opencv-install-on-windows-with-codeblocks-and-mingw/</a><br>
   but I am blocked in step 4.when I try to generate Cmake I have this Error :</p>
  
  <pre><code>CMake Error: CMake was unable to find a build program corresponding to "MinGW Makefiles".  CMAKE_MAKE_PROGRAM is not set.  You probably need to select a different build tool.
  CMake Error: CMake was unable to find a build program corresponding to "MinGW Makefiles".  CMAKE_MAKE_PROGRAM is not set.  You probably need to select a different build tool.
  CMake Error: Error required internal CMake variable not set, cmake may be not be built correctly.
  Missing variable is:
  CMAKE_CXX_COMPILER_ENV_VAR
  CMake Error: Error required internal CMake variable not set, cmake may be not be built correctly.
  Missing variable is:
  CMAKE_CXX_COMPILER
  CMake Error: Could not find cmake module file: C:/MinGW/CMakeFiles/3.3.0-rc1/CMakeCXXCompiler.cmake
  CMake Error: Error required internal CMake variable not set, cmake may be not be built correctly.
  Missing variable is:
  CMAKE_C_COMPILER_ENV_VAR
  CMake Error: Error required internal CMake variable not set, cmake may be not be built correctly.
  Missing variable is:
  CMAKE_C_COMPILER
  CMake Error: Could not find cmake module file: C:/MinGW/CMakeFiles/3.3.0-rc1/CMakeCCompiler.cmake
  CMake Error at CMakeLists.txt:63 (project):
    No CMAKE_CXX_COMPILER could be found.
  
    Tell CMake where to find the compiler by setting the CMake cache entry
    CMAKE_CXX_COMPILER to the full path to the compiler, or to the compiler
    name if it is in the PATH.
  
  
  CMake Error at CMakeLists.txt:63 (project):
    No CMAKE_C_COMPILER could be found.
  
    Tell CMake where to find the compiler by setting the CMake cache entry
    CMAKE_C_COMPILER to the full path to the compiler, or to the compiler name
    if it is in the PATH.
  
  
  CMake Error: CMAKE_CXX_COMPILER not set, after EnableLanguage
  CMake Error: CMAKE_C_COMPILER not set, after EnableLanguage
  Configuring incomplete, errors occurred!
  </code></pre>