Python 3.12 f2py compile error

[the-hampel]

As of Python version 3.12 distutils has been removed. This causes some compiler error when building the elk converter via f2py:

Traceback (most recent call last):
  File "<frozen runpy>", line 198, in _run_module_as_main
  File "<frozen runpy>", line 88, in _run_code
  File "/.venv/py312/lib/python3.12/site-packages/numpy/f2py/__main__.py", line 5, in <module>
    main()
  File "/.venv/py312/lib/python3.12/site-packages/numpy/f2py/f2py2e.py", line 732, in main
    run_compile()
  File "/.venv/py312/lib/python3.12/site-packages/numpy/f2py/f2py2e.py", line 705, in run_compile
    builder.compile()
  File "/.venv/py312/lib/python3.12/site-packages/numpy/f2py/_backends/_meson.py", line 131, in compile
    self.run_meson(self.build_dir)
  File "/.venv/py312/lib/python3.12/site-packages/numpy/f2py/_backends/_meson.py", line 117, in run_meson
    raise subprocess.CalledProcessError(
subprocess.CalledProcessError: Command '['meson', 'setup', 'bbdir']' returned non-zero exit status 1.

which is the following error in the meson log:

Could not introspect Python (['/.venv/py312/bin/python3.12', '/.venv/py312/lib/python3.12/site-packages/mesonbuild/scripts/python_info.py']): exit code 1
Program stdout:


Program stderr:

Traceback (most recent call last):
  File "/.venv/py312/lib/python3.12/site-packages/mesonbuild/scripts/python_info.py", line 16, in <module>
    import distutils.command.install
ModuleNotFoundError: No module named 'distutils'


meson.build:10:22: ERROR: <PythonExternalProgram 'python3' -> ['/.venv/py312/bin/python3.12']> is not a valid python or it is missing distutils
(END)

I have no idea why meson is trying to run this file, or it is corrupted. In principle, the issue is documented here: https://numpy.org/doc/stable/f2py/buildtools/index.html and discussed here: numpy/numpy#24838 .

However, changing:

dft_tools/python/triqs_dft_tools/converters/elktools/elkwrappers/CMakeLists.txt

Line 15 in b4c1050

COMMAND ${TRIQS_PYTHON_EXECUTABLE} -m numpy.f2py --f90exec=${CMAKE_Fortran_COMPILER} --f77exec=${CMAKE_Fortran_COMPILER} -c ${fortran_src_file} -m ${module_name} > elk_f2py.log

to (as suggested):

COMMAND ${TRIQS_PYTHON_EXECUTABLE} -m numpy.f2py -c ${fortran_src_file} -m ${module_name} --lower > elk_f2py.log

does not fix it.

Working on it... Any ideas welcome.

[the-hampel]

Installing setuptools fixes the problem: mesonbuild/meson#7702 . Then meson does the right thing. No adaptations in our cmake files required apparently. A working ubuntu 22.04 dockerfile can be found here:
https://github.com/the-hampel/Dockerfiles/blob/master/triqs3-dev/triqs-32x-py312-dockerfile .

Thanks to @Thoemi09 for helping.