I'm following this article to install caffe: https://qengineering.eu/install-caffe-on-ubuntu-18.04-with-opencv-4.2.html
and get this error after running make all with libboost-all-dev and libpython3 already installed.
LD -o .build_release/lib/libcaffe.so.1.0.0
/usr/bin/ld: cannot find -lboost_python3
/usr/bin/ld: cannot find -lpython3.6m
collect2: error: ld returned 1 exit status
make: *** [Makefile:596: .build_release/lib/libcaffe.so.1.0.0] Error 1
I have a feeling I may need to create a soft link for the files into path or append to my PATH, LIBRARY_PATH, or LD_LIBRARY_PATH, but I'm not actually able to locate the libpython.so or libboost files, so I'm not sure how that would be done.
First check the exact version of python that python3 is pointing to and also whether you have python3.6m
python3 -V
python3.6m -V
Both should return you Python 3.6m, otherwise find out exact version of python that is installed or version of python you want to use, accordingly change it in Makefile.
# say it's python3.7
PYTHON_LIBRARIES ?= boost_python3 python3.7
Locate libboost:
locate boost | fgrep .so
If libboost-all-dev is installed, located path will be either /usr/lib/x86_64-linux-gnu/ or /usr/lib64/ or /usr/lib/ or /usr/local/lib/ or some thing like this.
Then depending upon path you get (say you get /usr/lib/), look for exact libboost.so :
ls /usr/lib/libboost_python*.so
If return list includes libboost_python3.so, check whether LD_LIBRARY_PATH includes path to that (path here for ex: /usr/lib), otherwise do:
export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/path/to/libboost/
You can add it to your ~/.bashrc:
echo 'export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/path/to/libboost/' >> ~/.bashrc
If LD_LIBRARY_PATH includes path to .so for libboost, but name is different, say it's libboost_python-py37.so, accordingly change in Makefile.
# say it's python3.7
PYTHON_LIBRARIES ?= boost_python-py37 python3.7
Then do:
make all