opencv3.1+opencv_contrib编译错误问题解决

opencv3.1+opencv_contrib编译，cmake时候遇到下面问题：

[plain] view plain copy print ?

1. CMake Error at /home/ubuntu/opencv3.1.0/opencv-3.1.0/cmake/OpenCVUtils.cmake:895 (file):  
2.   file DOWNLOAD cannot open file for write.  
3. Call Stack (most recent call first):  
4.   /home/ubuntu/opencv3.1.0/opencv_contrib/modules/dnn_modern/CMakeLists.txt:20 (ocv_download)  
5.   
6.   
7. CMake Error at /home/ubuntu/opencv3.1.0/opencv-3.1.0/cmake/OpenCVUtils.cmake:899 (message):  
8.   Failed to download .  Status=  
9. Call Stack (most recent call first):  
10.   /home/ubuntu/opencv3.1.0/opencv_contrib/modules/dnn_modern/CMakeLists.txt:20 (ocv_download)  
11.   
12.   
13. -- Configuring incomplete, errors occurred!  
14. See also "/home/ubuntu/opencv3.1.0/opencv-3.1.0/build/CMakeFiles/CMakeOutput.log".  
15. See also "/home/ubuntu/opencv3.1.0/opencv-3.1.0/build/CMakeFiles/CMakeError.log".  

CMake Error at /home/ubuntu/opencv3.1.0/opencv-3.1.0/cmake/OpenCVUtils.cmake:895 (file):
  file DOWNLOAD cannot open file for write.
Call Stack (most recent call first):
  /home/ubuntu/opencv3.1.0/opencv_contrib/modules/dnn_modern/CMakeLists.txt:20 (ocv_download)


CMake Error at /home/ubuntu/opencv3.1.0/opencv-3.1.0/cmake/OpenCVUtils.cmake:899 (message):
  Failed to download .  Status=
Call Stack (most recent call first):
  /home/ubuntu/opencv3.1.0/opencv_contrib/modules/dnn_modern/CMakeLists.txt:20 (ocv_download)


-- Configuring incomplete, errors occurred!
See also "/home/ubuntu/opencv3.1.0/opencv-3.1.0/build/CMakeFiles/CMakeOutput.log".
See also "/home/ubuntu/opencv3.1.0/opencv-3.1.0/build/CMakeFiles/CMakeError.log".

需要把

[plain] view plain copy print ?

1. opencv_contrib/modules/dnn_modern/CMakeLists.txt 中的FILENAME替换为PACKAGE
2. 对应的**.cmake也中对应错误处 中的FILENAME替换为PACKAGE

同理，其他地方报错，继续如此替换即可！