Note that giving new tasks a high priority most probably means that it is important enough that you work on it instead of expecting someone will do so. So go ahead. :-)

In T24971#138723, @kislinsk wrote:

Note that giving new tasks a high priority most probably means that it is important enough that you work on it instead of expecting someone will do so. So go ahead. :-)

What exactly do you think I'm doing right now?

In T24971#138724, @kirchnth wrote:

In T24971#138723, @kislinsk wrote:

Note that giving new tasks a high priority most probably means that it is important enough that you work on it instead of expecting someone will do so. So go ahead. :-)

What exactly do you think I'm doing right now?

Can only guess if you don't assign. :P

Note that the issue seems to occur for .zip files from thirdparty in general - but not on all windows machines
the .tar.gz files all work fine

Official .tar.gz files can be found on OpenCV's Github page, for example: https://github.com/opencv/opencv/releases/tag/3.4.1

Uploaded to mitk.org. MD5 is a0b7a47899e67b3490ea31edc4f6e8e6.

The "ultimate" fix would be to fix CMake. Great if you could further narrow down the issue.

When you fix it, please branch off alpha branch here: T24609: v2018.04-alpha

with the .tar.gz and new hash it works

2>  -- extracting...
2>       src='E:/master/mitk-sb/ep/src/opencv-3.4.1.tar.gz'
2>       dst='E:/master/mitk-sb/ep/src/OpenCV'
2>  -- extracting... [tar xfz]
2>  -- extracting... [analysis]
2>  -- extracting... [rename]

but then breaks here:

2>IPPICV: Download: ippicv_2017u3_win_intel64_general_20170822.zip
2>CUSTOMBUILD : CMake error : Problem with archive_write_finish_entry(): Can't restore time
2>CUSTOMBUILD : CMake error : Problem extracting tar: E:/master/mitk-sb/ep/src/OpenCV/.cache/ippicv/0421e642bc7ad741a2236d3ec4190bdd-ippicv_2017u3_win_intel64_general_20170822.zip

same issue

Is that something we want OpenCV to download? IPP sounds like Intel Performance Primitives and AFAIK its license isn't liberal enough to be compatible to ours. I guess there's a CMake-variable we can set for OpenCV to stop it downloading other stuff. This variable can then be set in CMakeExternals/OpenCV.cmake.

Pushed new branch T24971-fixOpenCV-zipIssue.

I experienced a similar problem, and I opened an issue in CMake: https://gitlab.kitware.com/cmake/cmake/issues/19132 .