Opencv 3.1安装遇到的问题记录

报错：

Ubuntu/3.0/OpenCV/opencv-3.0.0/modules/cudalegacy/src/graphcuts.cpp:120:54: error: ‘NppiGraphcutState’ has not been declared

     typedef NppStatus (*init_func_t)(NppiSize oSize, NppiGraphcutState** ppState, Npp8u* pDeviceMem);

原因在 之前安装了CUDA8，

在graphcuts.cpp中将

#include "precomp.hpp"

#if !defined (HAVE_CUDA) || defined (CUDA_DISABLER)

改为：

#include "precomp.hpp"

#if !defined (HAVE_CUDA) || defined (CUDA_DISABLER)  || (CUDART_VERSION >= 8000)

参考：
http://docs.opencv.org/3.1.0/db/df5/tutorial_linux_gcc_cmake.html