ImportError: Undefined symbol when importing aidge_core module

I encountered an ImportError when trying to import the aidge_core, aidge_backend_cpu and aidge_onnx modules. I have already attempted to resolve the issue based on solutions from issues #9 and #32, but the problem persists.

Below are the details of the aidge_core module import issue:

Error details:

Python 3.8.12 | packaged by conda-forge | (default, Sep 29 2021, 19:50:30) 
[GCC 9.4.0] on linux
Type "help", "copyright", "credits" or "license" for more information.

>>> import aidge_core
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/home/marwa/.conda/envs/aidge/lib/python3.8/site-packages/aidge_core/__init__.py", line 10, in <module>
    from aidge_core.aidge_core import * # import so generated by PyBind
ImportError: /home/marwa/.conda/envs/aidge/lib/python3.8/site-packages/aidge_core/aidge_core.cpython-38-x86_64-linux-gnu.so: `undefined symbol: _ZNK5Aidge10Dropout_Op20getAvailableBackendsB5cxx11Ev

Conda virtual environment details:

• Python version: 3.8.12
• aidge_core version: 0.4.1.dev17+g2a22b3bc.d20241218
• cmake version: 3.31.2
• fmt version: 10.2.1
• Operating system: Ubuntu 22.04

GCC compiler and libgcc library versions in the environment:

• _libgcc_mutex version: 0.1
• gcc version: 12.1.0
• gcc_impl_linux-64 version: 12.1.0
• gcc_linux-64 version: 12.1.0
• libgcc version: 14.2.0
• libgcc-devel_linux-64 version: 12.1.0
• libgcc-ng version: 14.2.0

Reproduced steps:

1. Installed the aidge_core, aidge_backend_cpu, and aidge_onnx modules in a Conda environment using pip.
2. Attempted to import the aidge_core module using import aidge_core.

Expected behavior:

The modules should import without any errors.

Observed behavior:

An ImportError is raised indicating an undefined symbol: _ZNK5Aidge10Dropout_Op20getAvailableBackendsB5cxx11Ev.

Questions:

1. Is there a step that I am missing where I add the link to the dropout.cpp during the building process?
2. Do you have any tutorial, example or commit where you added an operator on the CPU backend that I could follow?
3. Could this be due to a mismatch between the compiled .so file and my GCC version or Python ABI?

added High Priority label

changed the description

changed the description

There was indeed a missing step in adding the links to Dropout.cpp, DropoutImpl.cpp, and their corresponding .hpp files before the build process.

It appears that getAvailableBackends() function was not correctly defined.

The problem is now resolved!

closed