Python - importing c++ module interfaces - cannot open shared object file -

i'm using folder structure this:

program program/app/app.py program/app/lib.so program/app/py_interfaces.so program/launcher.py 

i have compiled python interfaces py_interaces.so boost.python linking ./lib.so, load library same folder interfaces. i'm importing interfaces in app.py:

import py_interfaces 

and if run app.py works fine. need run launcher/py , when that, error:

import error: ./lib.so: cannot open shared object file: no such file or directory. 

i guess loads py_interfaces.so fine, searches lib.so in wrong folder: program. possible force correctly? should link differently? dont' want change working directory (i need other files root program directory)

are sure . directory you're expecting? note . means current working directory. launcher.py not in same directory lib.so, , that's you're seeing. way linked things, have work in app dir.

try using real paths when linking or path relative library, py_interfaces.so. need fix in py_interfaces itself.

edit:

here post referencing file relative executable/library path.

as mentioned n.m. n comments, correct way link relative path provide -rpath $origin when linking, making whole dependency thing more robust.