title: How to find the Qt5 CMake module on Windows
body: <p>I'm trying to make a very basic Qt5 application using CMake on Windows.
  I used the documentation <a href="http://qt-project.org/doc/qt-5.0/qtdoc/cmake-manual.html#imported-targets" rel="noreferrer">of Qt5 to use CMake</a>, and my <code>main.cpp</code> file just contains a <code>main</code> function.</p>
  
  <p>My <code>CMakeLists.txt</code> is exactly:</p>
  
  <pre><code>cmake_minimum_required(VERSION 2.8.9)
  
  project(testproject)
  
  # Find includes in corresponding build directories
  set(CMAKE_INCLUDE_CURRENT_DIR ON)
  # Instruct CMake to run moc automatically when needed.
  set(CMAKE_AUTOMOC ON)
  
  # Find the QtWidgets library
  find_package(Qt5Widgets)
  
  # Tell CMake to create the helloworld executable
  add_executable(helloworld hello.cpp)
  
  # Use the Widgets module from Qt 5.
  qt5_use_modules(helloworld Widgets)
  </code></pre>
  
  <p>When in MSysGit bash I enter</p>
  
  <pre><code>$ cmake -G"Visual Studio 11"
  </code></pre>
  
  <p>I get this output:</p>
  
  <pre><code>$ cmake -G"Visual Studio 11"
  -- The C compiler identification is MSVC 17.0.60204.1
  -- The CXX compiler identification is MSVC 17.0.60204.1
  -- Check for working C compiler using: Visual Studio 11
  -- Check for working C compiler using: Visual Studio 11 -- works
  -- Detecting C compiler ABI info
  -- Detecting C compiler ABI info - done
  -- Check for working CXX compiler using: Visual Studio 11
  -- Check for working CXX compiler using: Visual Studio 11 -- works
  -- Detecting CXX compiler ABI info
  -- Detecting CXX compiler ABI info - done
  CMake Warning at CMakeLists.txt:11 (find_package):
    By not providing "FindQt5Widgets.cmake" in CMAKE_MODULE_PATH this project
    has asked CMake to find a package configuration file provided by
    "Qt5Widgets", but CMake did not find one.
  
    Could not find a package configuration file provided by "Qt5Widgets" with
    any of the following names:
  
      Qt5WidgetsConfig.cmake
      qt5widgets-config.cmake
  
    Add the installation prefix of "Qt5Widgets" to CMAKE_PREFIX_PATH or set
    "Qt5Widgets_DIR" to a directory containing one of the above files.  If
    "Qt5Widgets" provides a separate development package or SDK, be sure it has
    been installed.
  
  
  CMake Error at CMakeLists.txt:17 (qt5_use_modules):
    Unknown CMake command "qt5_use_modules".
  
  
  -- Configuring incomplete, errors occurred!
  </code></pre>
  
  <p>Do you have any ideas?</p>