[Error] Undefined Symbol when using @codon.jit for Python decorator

[tonyjie]

I follow the instructions here to try to use codon in Python codebase. I already installed codon in my installation dir MY_CODON_DIR, and MY_CODON_DIR/bin/codon is the executable. I can also run the codon commands directly in the CLI. But I failed to use @codon.jit for Python decorator.

This library will attempt to use an installed version of Codon. If Codon is installed at a non-standard path, set the CODON_DIR environment variable to the installation path.

I pip install codon-jit in my conda environment, and set the env variable CODON_DIR to MY_CODON_DIR, but running that demo python demo.py doesn't work. The error information is as follows:

Traceback (most recent call last):
  File "codon_jit.py", line 4, in <module>
    import codon
  File "MY_CONDA_ENV_DIR/lib/python3.8/site-packages/codon/__init__.py", line 5, in <module>
    from .decorator import jit, convert, JITError
  File "MY_CONDA_ENV_DIR/lib/python3.8/site-packages/codon/decorator.py", line 17, in <module>
    from .codon_jit import JITWrapper, JITError, codon_library
ImportError: MY_CONDA_ENV_DIR/lib/python3.8/site-packages/codon/codon_jit.cpython-38-x86_64-linux-gnu.so: undefined symbol: _ZN5codon3jit7jitInitERKNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEE

Do you know what happened? Thanks

[ghuls]

If you build codon your self from source and then build the python plugin from the codon dir, it works if you specify clang++ as C compiler.

cd python
CC=clang++ python setup.py install

[tonyjie]

If you build codon your self from source and then build the python plugin from the codon dir, it works if you specify clang++ as C compiler.

cd python
CC=clang++ python setup.py install

Hi, I didn't build codon from source. I followed this /bin/bash -c "$(curl -fsSL https://exaloop.io/install.sh)" to download and install. It's installed automatically into ~/.codon.

I tried to use CC=clang++ python setup.py install or pip install . under the ~/.codon/python dir, but the undefined symbol error is still the same.

the CODON_DIR environment variable is set to ~/.codon. I also tried a few other directories, e.g. ~/.codon/python, but it doesn't work. Could the problem be the wrong way of setting the env variable?

[ghuls]

You need to compile codon from the last git source as the 0.15.2 release doesn't have the correct symbol needed by the python codon-jit module.

[inumanag]

Working on it. Which OS / environment are you using, please?

[tonyjie]

Ok I see.

Working on it. Which OS / environment are you using, please?

I'm using Ubuntu 20.04.5 LTS. Conda environment.

[AzizAlqasem]

I have similar problem that was not solved using solutions mentioned above.

file name: demo.py import codon

$ python demo.py
libc++abi: terminating with uncaught exception of type codon::exc::ParserException: cannot locate standard library

I use MacOS (Apple M1 Pro) System Version: macOS 13.0 (22A380) Kernel Version: Darwin 22.1.0

codon version: 0.15.2 python version: 3.9.13

[inumanag]

Those should be fixed in #119--- will be merged & released soon. Thank you for the reports!

[arshajii]

This should be fixed now in the latest release (0.15.3). For the "cannot locate standard library" error, you can set the CODON_PATH environment variable to the standard library path. For example, for me would be:

export CODON_PATH=/Users/arshajii/.codon/lib/codon/stdlib

Please let us know if there are any other issues with this!

[arshajii]

Oh, please also update the codon-jit package to the latest version (0.1.1).

[AzizAlqasem]

It works for me now. Thanks!