@TobiasLangnerFUB @tfoote @pjreed @rokm @bblanchon
Could you please check this patch with your build configurations?

@alalek I'm not able to test right now as I'm working on a different project.

However, it looks very complicated, so I think it would be more reasonable to simply revert my commit.
Users who want to use RelWithDebugInfo would just need to build OpenCV themselves; apparently, most of them are already doing that anyway.

@alalek The patch works for my configuration.

I'm also having success with this patch in my builds.

My use case is building and using ROS packages that depend on OpenCV (my current environment is Ubuntu 16.04 with ROS Kinetic). I have OpenCV installed via ROS apt packages from their buildfarm (specifically ros-kinetic-opencv3). I normally build the entire ROS workspace with the -DCMAKE_BUILD_TYPE=RelWithDebInfo flag set. To test if this change works I naively applied the diff to my existing /opt/ros/kinetic/share/OpenCV-3.3.1/OpenCVConfig.cmake file. With the changes in this PR I was able to build my workspace and get the expected output from OpenCV calls.

This works for me.

Thanks all for testing that!

@bblanchon I tested this patch with MSVS CMake generator, Debug+Release OpenCV installation and RelWithDebugInfo config for simple application (without Qt) - it works.

👍

@vpisarev Hello from itSeez3D!
This does not seem to work anymore. opencv_dnn module depends on some other 3rd party libs (such as protobuf) and my external project in RelWithDebInfo configuration tries to link with Debug build of libprotobuf. Is there a workaround?