title: Unknown CMake Qt5 command
body: <p>I am currently trying to build a project using CMake.
  This is the output that I get</p>
  
  <pre><code>CMake Warning at ext/quazip/CMakeLists.txt:4 (FIND_PACKAGE):
    By not providing "FindQt5.cmake" in CMAKE_MODULE_PATH this project has
    asked CMake to find a package configuration file provided by "Qt5", but
    CMake did not find one.
  
    Could not find a package configuration file provided by "Qt5" with any of
    the following names:
  
      Qt5Config.cmake
      qt5-config.cmake
  
    Add the installation prefix of "Qt5" to CMAKE_PREFIX_PATH or set "Qt5_DIR"
    to a directory containing one of the above files.  If "Qt5" provides a
    separate development package or SDK, be sure it has been installed.
  
  
  CMake Error at ext/quazip/CMakeLists.txt:19 (qt5_wrap_cpp):
    Unknown CMake command "qt5_wrap_cpp".
  </code></pre>
  
  <p>I have Qt Creator installed and I am not sure why I am getting this error.
  I looked around on the web and they states that I should add</p>
  
  <pre><code>set(QT_USE_QTXML true)
  FIND_PACKAGE(Qt5)
  </code></pre>
  
  <p>after the #project in ext/quazip/CMakeLists.txt
  I have done that however I am still getting this error any suggestions ?</p>
  
  <p>Update:
  So I added the following to my top level CMakeLists.txt</p>
  
  <pre><code>find_package( Qt5Core REQUIRED )
  find_package( Qt5Widgets REQUIRED )
  find_package( Qt5Gui REQUIRED )
  find_package( Qt5OpenGL REQUIRED )
  find_package( Qt5Multimedia REQUIRED )
  find_package( Qt5WebKitWidgets REQUIRED )
  find_package( Qt5Xml REQUIRED )
  </code></pre>
  
  <p>I cleared the cache and then configured. At that point I get the following error.</p>
  
  <pre><code>CMake Error at CMakeLists.txt:3 (find_package):
    By not providing "FindQt5Core.cmake" in CMAKE_MODULE_PATH this project has
    asked CMake to find a package configuration file provided by "Qt5Core", but
    CMake did not find one.
  
    Could not find a package configuration file provided by "Qt5Core" with any
    of the following names:
  
      Qt5CoreConfig.cmake
      qt5core-config.cmake
  
    Add the installation prefix of "Qt5Core" to CMAKE_PREFIX_PATH or set
    "Qt5Core_DIR" to a directory containing one of the above files.  If
    "Qt5Core" provides a separate development package or SDK, be sure it has
    been installed.
  
  
  Configuring incomplete, errors occurred!
  </code></pre>