CMake errors on opencv_contrib master

[mihaibujanca]

System information (version)

• OpenCV => 3.2.0. Also tried with master
• Operating System / Platform => Ubuntu 16.04 64-bit
• OpenCV_contrib => master

Detailed description

When trying to build opencv with opencv contrib, the following error comes up when executing cmake:

 CMake Error at opencv_3.2/cmake/OpenCVUtils.cmake:1005 (file):
   file MD5 failed to read file
   "opencv_3.2/build/3rdparty/tinydnn/": Success
 Call Stack (most recent call first):
opencv_contrib/modules/dnn_modern/CMakeLists.txt:18 (ocv_download)

 CMake Error at opencv_3.2/cmake/OpenCVUtils.cmake:1043 (file):
   file DOWNLOAD cannot open file for write.
 Call Stack (most recent call first):
   opencv_contrib/modules/dnn_modern/CMakeLists.txt:18 (ocv_download)

 CMake Error at opencv_3.2/cmake/OpenCVUtils.cmake:1047 (message):
   Failed to download .  Status=
 Call Stack (most recent call first):
opencv_contrib/modules/dnn_modern/CMakeLists.txt:18 (ocv_download)

When building with opencv_contrib on branch 3.2.0, this does not occur

[mlee980]

I am having the same problem:

-- Downloading ... CMake Error at cmake/OpenCVUtils.cmake:947 (file): file DOWNLOAD cannot open file for write. Call Stack (most recent call first): modules/opencv_contrib/modules/dnn_modern/CMakeLists.txt:18 (ocv_download)

CMake Error at cmake/OpenCVUtils.cmake:951 (message): Failed to download . Status= Call Stack (most recent call first): modules/opencv_contrib/modules/dnn_modern/CMakeLists.txt:18 (ocv_download)

on macOS 10.12, opencv 3.1.0

[alalek]

opencv 3.1.0

You should keep both repositories synchronized (the same code version). There is nothing to fix in OpenCV, so closing this.