tufao安装过程中Could not find a package configuration file provided by "Qt5Core"解决办法

CMake Warning at cmake/OpenCVFindLibsGUI.cmake:18 (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.

解决办法：

1> cd ~/../../

2> find . -name  Qt5CoreConfig.cmake

得到路径：/opt/Qt5.7.0/5.7/gcc_64/lib/cmake/Qt5Core/Qt5CoreConfig.cmake

3>vim ~/myproject/tufao/build/CMakeCache.txt

修改内容如下：

//The directory containing a CMake configuration file for Qt5Core.
Qt5Core_DIR:PATH=/opt/Qt5.7.0/5.7/gcc_64/lib/cmake/Qt5Core

//The directory containing a CMake configuration file for Qt5Network.
Qt5Network_DIR:PATH=/opt/Qt5.7.0/5.7/gcc_64/lib/cmake/Qt5Network

保存退出，重新cmake .. -DCMAKE_INSTALL_PREFIX=/usr

OK.(我的build目录手动创建在tufao目录下)