Thank you for commenting. and sorry for mis-titling
One further question. (if you know the reason)
The warning message come from distutils.
Does this mean setup.py’s parameter “libraries” is not working correctly?
https://docs.python.org/3/distutils/setupscript.html#library-options 29
Ref.
https://github.com/python/cpython/blob/3.6/Lib/distutils/ccompiler.py#L1111 13