ubuntu libraries not found error when building

Question

I have prepared a setup.py file which requires the opencv libraries contrib,core and highgui. But when I build the setup.py I get an error saying

/usr/bin/ld:cannot find -lcontrib 
/usr/bin/ld:cannot find -lcore
/usr/bin/ld:cannot find -lhighgui 

I added an entry, "include /usr/local/lib" to the ld.so.conf file and ran the command ldconfig from the terminal. Still getting the same error. Please advice.

Answer 1

The linker flags should be -lopencv_contrib , -lopencv_core and -lopencv_highgui for a standard OpenCV2.4+ install from source or when using pre-built binaries. Also make sure these libraries do exist in /usr/local/lib . You could run ls /usr/local/lib | grep opencv ls /usr/local/lib | grep opencv to see if they exist.