compaile error

[flexibility2]

When I run make in build , it happens "warning: libopencv_core.so.3.2, needed by /data/caffe_wo/lib/libcaffe.so, may conflict with libopencv_core.so.2.4 /usr/bin/ld: CMakeFiles/mtcnn_c.dir/main.cpp.o: undefined reference to symbol '_ZN2cv6String10deallocateEv' //usr/local/lib/libopencv_core.so.3.2: error adding symbols: DSO missing from command line collect2: error: ld returned 1 exit status make[2]: *** [mtcnn_c] Error 1 make[1]: *** [CMakeFiles/mtcnn_c.dir/all] Error 2 make: *** [all] Error 2 " So, how can I fix this? Thanks!