title: CMake Error: CMake was unable to find a build program corresponding to "MinGW Makefiles"
body: <p>I am trying to use cmake to build the Box2D library for c++. When I run cmake gui I get the 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: CMAKE_C_COMPILER not set, after EnableLanguage
  CMake Error: CMAKE_CXX_COMPILER not set, after EnableLanguage
  Configuring incomplete, errors occurred!
  </code></pre>
  
  <p>Most questions like these people have answered by saying "Add MinGw/bin to the PATH" but I already have that on the PATH. What else could be causing this error?</p>