Missing symbol on assets conversion.

Hi guys, I want to contribute but I encountered an error while running the openage project. The error occurs when attempting to convert assets after launching. Below is the terminal output:

daniel@DanielPC:~/workareas/openage$ make run
cd bin && ./run main
INFO [py] launching openage 
INFO [py] compiled by GNU 13.3.0
INFO [py] running in DEVMODE
INFO [py] openage nyan API modpack is up to date
  Do you want to convert assets? [Y/n]
> Y

openage requires a local game installation for conversion
but no local installation could be found automatically.
  Do you want to download the AoC trial version? [Y/n]
> Y
Downloading AoC trial version from https://archive.org/download/AgeOfEmpiresIiTheConquerorsDemo/Age2XTrial.exe
Extracting game files to [Directory(/tmp/tmp17ck0xzt)]:...
converting from '/tmp/tmp17ck0xzt'
INFO [py] Looking for compatible games to convert...
INFO [py] Compatible game edition detected:
INFO [py]  * Age of Empires 2: The Conqueror's Trial Version
INFO [py] converting metadata
INFO [py] using cached wrapper: /tmp/AOC_empires2_x1.dat.pickle
INFO [py] Finished metadata read (1.20 seconds)
INFO [py] Starting conversion...
INFO [py] Extracting Genie data...
INFO [py] Creating API-like objects...
INFO [py] Linking API-like objects...
INFO [py] Generating auxiliary objects...
INFO [py] Creating nyan objects...
INFO [py] Creating requests for media export...
INFO [py] Finished data conversion (1.46 seconds)
INFO [py] Starting export...
INFO [py] Dumping info file...
INFO [py] Dumping data files...
INFO [py] Exporting media files...
INFO [py] -- Exporting graphics files...
Exception in thread Thread-3 (_handle_results):
multiprocessing.pool.RemoteTraceback: 
"""
Traceback (most recent call last):
  File "/usr/lib/python3.12/multiprocessing/pool.py", line 125, in worker
    result = (True, func(*args, **kwds))
                    ^^^^^^^^^^^^^^^^^^^
  File "/home/daniel/workareas/openage/.bin/g++-debug-Oauto-sanitize-none/openage/convert/processor/export/media_exporter.py", line 819, in _export_texture
    texture = Texture(image, palettes)
              ^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/daniel/workareas/openage/.bin/g++-debug-Oauto-sanitize-none/openage/convert/entity_object/export/texture.py", line 97, in __init__
    from ...value_object.read.media.smx import SMX
ImportError: /home/daniel/workareas/openage/.bin/g++-debug-Oauto-sanitize-none/openage/convert/value_object/read/media/smx.cpython-312-x86_64-linux-gnu.so: undefined symbol: _ZL89__pyx_f_7openage_7convert_12value_object_4read_5media_3smx_8SMXLayer_process_drawing_cmdsP69__pyx_obj_7openage_7convert_12value_object_4read_5media_3smx_SMXLayerP76__pyx_obj_7openage_7convert_12value_object_4read_5media_3smx_SMXOutlineLayerR18__Pyx_memviewsliceRSt6vectorI64__pyx_t_7openage_7convert_12value_object_4read_5media_3smx_pixelSaIS6_EElllim
"""
-- Files done:   0/275
The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "/usr/lib/python3.12/threading.py", line 1073, in _bootstrap_inner
    self.run()
  File "/usr/lib/python3.12/threading.py", line 1010, in run
    self._target(*self._args, **self._kwargs)
  File "/usr/lib/python3.12/multiprocessing/pool.py", line 595, in _handle_results
    cache[job]._set(i, obj)
  File "/usr/lib/python3.12/multiprocessing/pool.py", line 781, in _set
    self._error_callback(self._value)
  File "/home/daniel/workareas/openage/.bin/g++-debug-Oauto-sanitize-none/openage/convert/processor/export/media_exporter.py", line 260, in error_callback
    raise exception
ImportError: /home/daniel/workareas/openage/.bin/g++-debug-Oauto-sanitize-none/openage/convert/value_object/read/media/smx.cpython-312-x86_64-linux-gnu.so: undefined symbol: _ZL89__pyx_f_7openage_7convert_12value_object_4read_5media_3smx_8SMXLayer_process_drawing_cmdsP69__pyx_obj_7openage_7convert_12value_object_4read_5media_3smx_SMXLayerP76__pyx_obj_7openage_7convert_12value_object_4read_5media_3smx_SMXOutlineLayerR18__Pyx_memviewsliceRSt6vectorI64__pyx_t_7openage_7convert_12value_object_4read_5media_3smx_pixelSaIS6_EElllim
-- Files done:   0/275

This error seems to be related to an undefined symbol in the compiled Python extension (smx.cpython-312-x86_64-linux-gnu.so). I am unsure if this is expected behavior or a bug?

I tried it on WSL2 and virtual machine with Ubuntu 24.04 LTS, same result. My setup:

### Python Version:
Python 3.12.3
### Installed Python Packages:
Package             Version
------------------- -------------
attrs               23.2.0
Automat             22.10.0
Babel               2.10.3
bcrypt              3.2.2
blinker             1.7.0
certifi             2023.11.17
chardet             5.2.0
click               8.1.6
cloud-init          24.4.1
colorama            0.4.6
command-not-found   0.3
configobj           5.0.8
constantly          23.10.4
cryptography        41.0.7
Cython              3.0.8
dbus-python         1.3.2
distro              1.9.0
distro-info         1.7+build1
gyp                 0.1
httplib2            0.20.4
hyperlink           21.0.0
idna                3.6
incremental         22.10.0
Jinja2              3.1.2
jsonpatch           1.32
jsonpointer         2.0
jsonschema          4.10.3
launchpadlib        1.11.0
lazr.restfulclient  0.14.6
lazr.uri            1.0.6
lz4                 4.0.2+dfsg
Mako                1.3.2.dev0
markdown-it-py      3.0.0
MarkupSafe          2.1.5
mdurl               0.1.2
netifaces           0.11.0
numpy               1.26.4
oauthlib            3.2.2
olefile             0.46
packaging           24.0
pillow              10.2.0
pip                 24.0
pyasn1              0.4.8
pyasn1-modules      0.2.8
pycairo             1.25.1
pycurl              7.45.3
Pygments            2.17.2
PyGObject           3.48.2
PyHamcrest          2.1.0
PyJWT               2.7.0
pyOpenSSL           23.2.0
pyparsing           3.1.1
pyrsistent          0.20.0
pyserial            3.5
python-apt          2.7.7+ubuntu4
pytz                2024.1
PyYAML              6.0.1
requests            2.31.0
rich                13.7.1
service-identity    24.1.0
setuptools          68.1.2
six                 1.16.0
systemd-python      235
toml                0.10.2
Twisted             24.3.0
typing_extensions   4.10.0
ubuntu-pro-client   8001
unattended-upgrades 0.1
urllib3             2.0.7
wadllib             1.3.6
wheel               0.42.0
zope.interface      6.1
### System Information:
Linux DanielPC 5.15.167.4-microsoft-standard-WSL2 #1 SMP Tue Nov 5 00:21:55 UTC 2024 x86_64 x86_64 x86_64 GNU/Linux
### CMake Version:
cmake version 3.28.3

Do you have any idea what's wrong and how to fix it? What python version do you use to build? 3.12.3 shall not be supported then?

Start by inspecting openage/convert/processor/export/media_exporter.py and openage/convert/entity_object/export/texture.py around the SMX import, then examine the generated smx.cpython-312-x86_64-linux-gnu.so named in the traceback. Reproduce the asset conversion on the reported Ubuntu and Python 3.12 setup; done means the SMX extension loads and conversion completes without the undefined-symbol error.