CMake Error: CMake was unable to find a build program corresponding to "MinGW Makefiles". CMAKE_MAK

Cmake 编译OpenCV3.1.0过程中出现如下错误：
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.
解决办法：MinGW没有找到，需要重新配置环境变量，指定Qt安装目录下MinGW位置，如…/Qt5.10.1/Tools/mingw530_32/bin/mingw32-make.exe，若是还是不行需要安装一下MinGW了。