Caffe installation, linking issue - linux

Question

I have the following issue encoutering during caffe installation:
/usr/bin/ld: cannot find -lopencv_imgcodecs
I built opencv3.2, but I believe I have an issue with linking the cv2.cpython-36m-x86_64-linux-gnu.so library. I tried adding it to the LD_LIBRARY_PATH but it still fails with the same error.
Shall I make a link to the cv2.cpython-36m-x86_64-linux-gnu.so in the LD path? if yes, which path exactly shall I make the link in it.
Here is the last few lines of the output (the error msg):
CXX examples/mnist/convert_mnist_data.cpp
CXX .build_release/src/caffe/proto/caffe.pb.cc
AR -o .build_release/lib/libcaffe.a
LD -o .build_release/lib/libcaffe.so.1.0.0
/usr/bin/ld: cannot find -lopencv_imgcodecs
collect2: error: ld returned 1 exit status
Makefile:572: recipe for target '.build_release/lib/libcaffe.so.1.0.0' failed
make: *** [.build_release/lib/libcaffe.so.1.0.0] Error 1

Answer 1

It can't find the way to reach libopencv_imgcodecs.so, check where it is located & add same path in LIBRARY_DIRS of Makefile.config
Open your Makefile.config file, you'll find the following lines:
# Whatever else you find you need goes here.
INCLUDE_DIRS := $(PYTHON_INCLUDE) /usr/local/include
LIBRARY_DIRS := $(PYTHON_LIB) /usr/local/lib /usr/lib
If you've found the location, for example /home/username/anaconda3/envs/env-name/lib, then add it to LIBRARY_DIRS.
LIBRARY_DIRS := $(PYTHON_LIB) /usr/local/lib /usr/lib /home/<username>/anaconda3/envs/<env-name>/lib