libcxcore.so.2 missing in openCV

Question

I'm trying to run some precompiled code (source code is not available) on Ubuntu, which requires openCV to be installed. I installed the latest version of openCV (from the SVN) yesterday, and installed it according to the debian install guide on the openCV website (cmake -> make -> sudo make install) and everything seemed to go fine.

Now when I try to run the precompiled code, i'm getting the error "./stipdet: error while loading shared libraries: libcxcore.so.2: cannot open shared object file: No such file or directory" It seems that other people who are having a similar problem managed to fix it by moving libcxcore.so.2 from the opencv lib folder to somewhere else, but I don't have libcxcore.so.2 in my opencv folder at all. I do see libopencv_core.so.2.2 in there among other things. Could it be that the name of libcxcore has been changed in the latest version of openCV? Or did I not install it correctly?

btw: running locate libcxcore in the terminal returns nothing

Answer 1

I had the same problem and I solved the problem by installing libcv, libcvaux, libhighgui and their -dev libraries from Synaptics. But the program dependent on the libcv.so.2 shared libraries but Synaptics installs libcv.so.4.0.0. So I created symbolic links for every installed library by running command:

sudo ln -s /usr/lib/libcxcore.so.4.0.0 /usr/lib/libcxcore.so.2

and so on for every library that the program needs. Now it is working fine for me.

Answer 2

I had the same problem working on STIP and OpenCV 2.2. To solve the issue, just create symbolic links as below. It works for me.

libcvaux.so.2 -> /usr/lib/libopencv_video.so.2.2.0
libcv.so.2 -> /usr/lib/libopencv_legacy.so.2.2.0
libcxcore.so.2 -> /usr/lib/libopencv_core.so.2.2.0
libhighgui.so.2 -> /usr/lib/libopencv_highgui.so.2.2.0
libml.so.2 -> /usr/lib/libopencv_ml.so.2.2.0

Answer 3

a small addition to (correct) answer by Zifei Tong: One needs to make the symbolic links AND also needs to export LD_LIBRARY_PATH for bash, it is :

libcvaux.so.2 -> /usr/lib/libopencv_video.so.2.2.0
libcv.so.2 -> /usr/lib/libopencv_legacy.so.2.2.0
libcxcore.so.2 -> /usr/lib/libopencv_core.so.2.2.0
libhighgui.so.2 -> /usr/lib/libopencv_highgui.so.2.2.0
libml.so.2 -> /usr/lib/libopencv_ml.so.2.2.0

export LD_LIBRARY_PATH="path to symbolic links' directory"