python3-bluez: No module named 'bluetooth._bluetooth' on non-x86_64 systems

[ElementW]

System

• xuname: Void 4.14.52_1 armv7l-musl uptodate r
• package: python3-bluez-0.22_3

Steps to reproduce the behavior

Import the bluetooth module in Python 3.

Expected behavior

Importing the bluetooth module on Python 3 works.

Actual behavior

Library is generated as /usr/lib/python3.6/site-packages/bluetooth/_bluetooth.cpython-36m-x86_64-linux-gnu.so (which does target the good architecture, not x86_64 as the name implies), and Python fails to load it due to mismatching arch in the filename:

Traceback (most recent call last):
  File "./bt_test.py", line 3, in <module>
    import bluetooth
  File "/usr/lib/python3.6/site-packages/bluetooth/__init__.py", line 45, in <module>
    from bluetooth.bluez import *
  File "/usr/lib/python3.6/site-packages/bluetooth/bluez.py", line 10, in <module>
    import bluetooth._bluetooth as _bt
ModuleNotFoundError: No module named 'bluetooth._bluetooth'

Moving the .so to /usr/lib/python3.6/site-packages/bluetooth/_bluetooth.so cascades into yet another error:

ImportError: Error relocating /usr/lib/python3.6/site-packages/bluetooth/_bluetooth.so: Py_InitModule4: symbol not found

This means the .so is built for Python 2 as the Py_InitModule family of symbols are not used any more since Python 3 (nm -D /usr/lib/python3.6/site-packages/bluetooth/_bluetooth.so | grep Py_InitModule4 shows it's an undefined symbol so the linker tries to import it, alas in vain).

Something is most likely wrong with the cross-compilation environment.

Installing PyBluez from pip works properly.

[maxice8]

Should be fixed by #8039

[teldra]

is this #4639 also solved by #8039 ?

[maxice8]

Should be fixed by #8039