Working on a code that enables Python to call a C++ code compiled into shared library file (.so file) via Python's ctypes module, using the standard ctypes.CDLL method. The C++ code performs the numerical calculations and the Python code mainly serves as a controller and performs data analysis. Everything worked fine. However, as soon as I included jsoncpp library in C++ code, Python started to complain about undefined symbol errors such as undefined symbol: _ZN4Json5ValueaSES0_ etc. I used jsoncpp library in C++ mainly to export data to a JSON file. Having searched the internet for a while, it appears this hasn't been discussed that much. Any idea how to handle this?
Well, looks like the solution is to also include -ljsoncpp flag while compiling towards the shared .so file:
$(CC) -shared -o testcode.so testcode.o -ljsoncpp