Build caffe wrong when input “ make all ”

Question

when I build the caffe in ubuntu 16.04 ( after "make all"), it displays as bellow:

AR -o .build_release/lib/libcaffe.a LD -o

.build_release/lib/libcaffe.so.1.0.0-rc5 /usr/bin/ld: cannot find -l -lopencv_core

collect2: error: ld returned 1 exit status

Makefile:573: recipe for target '.build_release/lib/libcaffe.so.1.0.0-rc5' failed

make: *** [.build_release/lib/libcaffe.so.1.0.0-rc5] Error 1

Answer 1

Looks like you don't have opencv installed on your system. Install opencv either from sources or with app-get install libopencv-dev. If opencv libraries are already on your system (try locate libopencv_core to make sure), run:

export LD_LIBRARY_PATH=/path/to/opencv/libs
sudo ldconfig