No output from clang2py even for simple headers - CLANG compatibility issues

[lbureau-billettiqueservices]

I have been stuck with clang2py for a few hours now, absolutely no output is given even for extremely simple header files.

Here is the docker environment i'm working with that can reproduce the problem:

FROM python:3.8.16

RUN apt-get update && apt-get install lsb-release wget software-properties-common -y

WORKDIR /tmp
RUN wget https://apt.llvm.org/llvm.sh && chmod +x llvm.sh
RUN ./llvm.sh 11

RUN pip3 install ctypeslib2
RUN rm -r /tmp/*

RUN mkdir /workspace

WORKDIR /workspace

It just starts from the python 3.8.16 official image, install some minor packages to then install llvm/clang 11, which should allow proper support for clang2py.

I then install ctypeslib2 via pip. Nothing extraordinary.

I then try to pass it this extremely simple header file, just to test if something is working

#pragma once

#define AVALUE 10

typedef enum {
    something,
    somethingelse,
} anEnum;

but clang2py does not give any output whatsoever. Using the -v flag doesnt give any information about what could be the problem either.

I must be doing something wrong somewhere, because i used to be able to reliably use clang2py for much more complex header files, actively used in a python wrapper around a C library, but i can't get it working at all right now.

Any help would be appreciated.

[trolldbois]

What is the clang2py full command line you are using?

[lbureau-billettiqueservices]

What is the clang2py full command line you are using?

clang2py demo.h.

I also tried clang2py -o demo.py demo.h but the resulting demo.py file is just as empty.

edit: demo.h is the header file as given in the opening message.

[lbureau-billettiqueservices]

side note: clang2py exits with exit code 0. There is just no output whatsoever.

Here is a full output for reference:

root@1c9918f0e4cd:/workspace# cat demo.h
#pragma once

#define AVALUE 10

typedef enum {
    something,
    somethingelse,
} anEnum;
root@1c9918f0e4cd:/workspace# clang2py demo.h
root@1c9918f0e4cd:/workspace# 

[trolldbois]

@lbureau-billettiqueservices bottom line it's a dependency issue with the python bindings from clang.

Solution
pending a better error message in the next release, uses this to install ctypeslib2
pip install clang==11 ctypeslib2

Explainer
docker.io/python:3.8.16 will default to python3.8 installed in /usr/local/bin/python3.8
on the same container, there is a /usr/bin/python3.9

• When you run llvm.sh it does not apt install a python package for clang.
  you could install it, but that won't solve your issue - apt install python3-clang-11
  if you installed that, it would install the clang 11 package in /usr/lib/python3.9/site-packages.
  That won't help you , because the container would run /usr/local/bin/python3.8

• When you install ctypeslib2, the current version is 2.3.2 from pypi, it has a loose dependency on python-clang
  the latest version of the python-clang package on pypi is clang16 released recently.
  the ctypeslib2 v2.3.2 package doesn't like that apparently and errors out silently.
  if you force the installation of the v11 python-clang package, it will properly work.

• If you install the latest code from this repo, the error is a bit clearer.

Conclusion: I need to push a new ctypeslib package on pypi

[trolldbois]

warning messages are added in v2.3.3, it does not silently fail

[lbureau-billettiqueservices]

Thanks for the fantastic support @trolldbois , i'm going to test your solution asap.