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building minimum required for aruco. succesfully build working lib. but wont build aruco examples. using ccmake - build examples flag is set. it does not appear taht any additional modules or libs are required - but no luck. any help appreciated.

I have expanded the info here - as requested.

I am a long time user of OpenCV. For the past several months been working with aruco on a very small embedded system using Ubuntu 15.10 and OpenCV 3.1/2. My development cycle starts on a large Intel system running Ubuntu 16.04. I develop the code on this, then copy the source to the armv7l/Ubuntu 15.10 embedded system, and recompile.

Size is limited on the embedded system, and I have successfully built and used aruco on a minimum OpenCV build (aruco, core, highui, imgproc, img_codecs, calib3d, features2d, flann and ml). The resulting static libs link and function properly with a small multi-threaded system that uses aruco for local position. This works both on the large Ubuntu 16.04 machine, and the embedded Ubuntu 15.10 one.

My problem is that I want to use the examples that come with aruco for marker creation and calibration. I only need this on the larger Intel/Ubuntu 16.04 system. I did not have any problem with this on 3.1. I simply used ccmake to set BUILD_EXAMPLES to ON, and recompiled.

But this does not seem to work any more. As far as I can tell, the system does not even try to compile the examples.

I am not getting any errors. I have tried building minimum required a fuller version of opencv - though not absolutely everything. About the only odd thing in my setup is that I limit it to static libs. So I tried it with shared libs with no change in results.

I have completely torn out opencv and restarted from new git clones. I have looked on this forum, and more broadly, for aruco. succesfully hints and have not discovered anything.

I can undoubtedly figure out how to compile the couple of tools I need, since the code is in the tree. But, I am thoughtful that it simply will not build working lib. but wont build aruco examples. using ccmake any examples.

So - build examples flag is set. it does not appear taht any additional modules or libs are required - but no luck. any help appreciated. anybody have any thoughts as to what could be going on?

thanks much

I have expanded the info here - as requested.

I am a long time user of OpenCV. For the past several months been working with aruco on a very small embedded system using Ubuntu 15.10 and OpenCV 3.1/2. My development cycle starts on a large Intel system running Ubuntu 16.04. I develop the code on this, then copy the source to the armv7l/Ubuntu 15.10 embedded system, and recompile.

Size is limited on the embedded system, and I have successfully built and used aruco on a minimum OpenCV build (aruco, core, highui, imgproc, img_codecs, calib3d, features2d, flann and ml). The resulting static libs link and function properly with a small multi-threaded system that uses aruco for local position. This works both on the large Ubuntu 16.04 machine, and the embedded Ubuntu 15.10 one.

My problem is that I want to use the examples that come with aruco for marker creation and calibration. I only need this on the larger Intel/Ubuntu 16.04 system. I did not have any problem with this on 3.1. I simply used ccmake to set BUILD_EXAMPLES to ON, and recompiled.

But this does not seem to work any more. As far as I can tell, the system does not even try to compile the examples.

I am not getting any errors. I have tried building a fuller version of opencv - though not absolutely everything. About the only odd thing in my setup is that I limit it to static libs. So I tried it with shared libs with no change in results.

I have completely torn out opencv and restarted from new git clones. I have looked on this forum, and more broadly, for hints and have not discovered anything.

I can undoubtedly figure out how to compile the couple of tools I need, since the code is in the tree. But, I am thoughtful that it simply will not build any examples.

So - anybody have any thoughts as to what could be going on?

thanks much