shared libraries conflict

asked 2020-04-25 07:21:57 -0600

andrei186 gravatar image

OpenCV.3.4.10 on Ubuntu 18.04

To use findTransformECC I had to install libopencv_video.so.3.4.10 As a result all my other cpp, which worked well with the libraries mentioned below, now compile with warning:

/usr/bin/ld: warning: libopencv_imgproc.so.3.4, needed by /OpenCV-3.4/lib/libopencv_highgui.so, may conflict with libopencv_imgproc.so.3.2

   /usr/bin/ld: warning: libopencv_core.so.3.4, needed by /OpenCV-3.4/lib/libopencv_highgui.so, may conflict with libopencv_core.so.3.2

Running the compiled file aborts saying:

error loading shared libraries: libopencv_highgui.so.3.4: cannot open shared object file: No such file or directory

In my /OpenCV-3.4/lib/ I have all these .so files in three versions so, so.3.4 and so.3.4.10 but no so.3.2

Can someone explain what is going on and how to fix it?

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Comments

You'll be better to upgrade to OpenCV 4

supra56 gravatar imagesupra56 ( 2020-04-25 07:32:27 -0600 )edit
1

More details. Though there is no libopencv_core.so.3.2 in my installation/OpenCV-3.4/lib, file search found it in /lib/x86_64-linux-gnu. By the time-stamp it was created exactly after (and probably as a result of) installation of libopencv-video-dev.

gcc -m64 -Xlinker --verbose  2>/dev/null | grep SEARCH | sed 's/SEARCH_DIR("=\?\([^"]\+\)"); */\1\n/g'  | grep -vE '^$'

returned 12 pathes, /lib/x86_64-linux-gnu being the second one.

My compile script in a makefile:

SOURCE=test_homography
all:
sudo g++ $(SOURCE).cpp -o $(SOURCE) -I /home/a/Downloads/installation/OpenCV-3.4/include -L /home/a/Downloads/installation/OpenCV-3.4/lib -lopencv_core  -lopencv_highgui -lopencv_photo -lopencv_videoio -lopencv_imgproc  -lopencv_calib3d  $(pkg-config opencv --cflags --libs)
andrei186 gravatar imageandrei186 ( 2020-04-25 08:26:47 -0600 )edit
1

It looks like ld takes all these shared libraries from my installation/OpenCV-3.4/lib. But ignores libopencv_core.so, libopencv_core.so.3.4 and libopencv_core.so.3.4.10 sitting here. It goes to /lib/x86_64-linux-gnu and picks up libopencv_core.so.3.2 which conflicts with libopencv_core.so.3.4 demanded by libopencv_highgui.so

Why this strated happening after installing libopencv-video-dev and how to fix it?

andrei186 gravatar imageandrei186 ( 2020-04-26 11:18:02 -0600 )edit
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