解决：Could NOT find KF5 (missing: CoreAddons DBusAddons DocTools XmlGui)

错误描述：环境Ubuntu16.04

-- Could NOT find KF5XmlGui: found neither KF5XmlGuiConfig.cmake nor kf5xmlgui-config.cmake 
-- Configuring incomplete, errors occurred!
See also "/tmp/QtCreator-lULklN/qtc-cmake-XXRffIwL/CMakeFiles/CMakeOutput.log".
CMake Error at /usr/share/cmake-3.5/Modules/FindPackageHandleStandardArgs.cmake:148 (message):
  Could NOT find KF5 (missing: CoreAddons DBusAddons DocTools XmlGui)
Call Stack (most recent call first):
  /usr/share/cmake-3.5/Modules/FindPackageHandleStandardArgs.cmake:388 (_FPHSA_FAILURE_MESSAGE)
  /usr/share/ECM/find-modules/FindKF5.cmake:110 (find_package_handle_standard_args)
  CMakeLists.txt:10 (find_package)

Could not find a package configuration file provided by "ECM" (requested
  version 1.8.0) with any of the following names:

CMake配置过程中发现ECM，KF5模块找不到，于是给出解决办法是：请指定这些模块的具体路径，