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compile error in opencv2/flann/lsh_table.h when compiling bgslibrary

asked 2012-07-12 09:31:31 -0500

penfold1972 gravatar image

updated 2012-07-12 10:42:46 -0500

I'm learning about OpenCV and found the bgslibrary for background separation, that I thought I would take for a spin. I get the following error when I try to compile it, and if I am reading it right, it seems like it's having an issue with the flann/lsh_table.h file in OpenCV, so I thought I would post this problem here.

The error is:

In file included from /usr/local/include/opencv2/flann/lshindex.h:49,
                 from /usr/local/include/opencv2/flann/allindices.h:42,
                 from /usr/local/include/opencv2/flann/flannbase.hpp:44,
                 from /usr/local/include/opencv2/flann/flann.hpp:50,
                 from /usr/local/include/opencv/cv.h:69,
                 from /home/scobb/Source/slc/backgroundsubtraction/bgs/updated/bgslibrary-read-only/PreProcessor.h:4,
                 from /home/scobb/Source/slc/backgroundsubtraction/bgs/updated/bgslibrary-read-only/PreProcessor.cpp:1:
/usr/local/include/opencv2/flann/lshtable.h: In member function ‘void cvflann::lsh::LshTable<elementtype>::add(cvflann::Matrix<t>)’:
/usr/local/include/opencv2/flann/lshtable.h:196: error: ‘usespeed_’ was not declared in this scope
make[2]: * [CMakeFiles/bgs.dir/PreProcessor.cpp.o] Error 1
make[1]:  [CMakeFiles/bgs.dir/all] Error 2
make: ** [all] Error 2

The bgslibrary is found at if someone wants to try to compile it themselves. I am using OpenCV-2.4.2 which compiled and installed on my system (Ubuntu Linux) just fine.

Can someone point me in the right direction?

edit If I edit opencv2/flann/lsh_table.h and comment out line 196, bgslibrary compiles. So, I'm pretty sure this is a problem in OpenCV-2.4.2

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answered 2012-07-12 11:03:32 -0500

Vincent Rabaud gravatar image

Thx for reporting the bug. Please use the bug tracker next time though The bug is due to the fact that you are using gcc and C++11 flags. If you don't use those, things will be fine. It got fixed in 9018 and will be fixed in 2.4.3. Thx !

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Asked: 2012-07-12 09:31:31 -0500

Seen: 1,539 times

Last updated: Jul 12 '12