DeprecatedInstaller on Python3.12 + Ubuntu 24.04

[ripaul]

Hi,

I recently got force to switch to Ubuntu 24.04 which comes with Python 3.12. Since then I get the following error when trying to install cyipopt via pip:

$ pip install cyipopt
Collecting cyipopt
  Using cached cyipopt-1.5.0.tar.gz (68 kB)
  Installing build dependencies ... done
  Getting requirements to build wheel ... error
  error: subprocess-exited-with-error

  × Getting requirements to build wheel did not run successfully.
  │ exit code: 1
  ╰─> [34 lines of output]
      <string>:32: _DeprecatedInstaller: setuptools.installer and fetch_build_eggs are deprecated.
      !!

              ********************************************************************************
              Requirements should be satisfied by a PEP 517 installer.
              If you are using pip, you can try `pip install --use-pep517`.
              ********************************************************************************

      !!
      Package ipopt was not found in the pkg-config search path.
      Perhaps you should add the directory containing `ipopt.pc'
      to the PKG_CONFIG_PATH environment variable
      Package 'ipopt', required by 'virtual:world', not found
      Using Ipopt found with pkg-config.
      Traceback (most recent call last):
        File "/mnt/gpu_public/r.paul/proj/bayesopt-mcmc/experiments/venv/lib/python3.12/site-packages/pip/_vendor/pyproject_hooks/_in_process/_in_process.py", line 353, in <module>
          main()
        File "/mnt/gpu_public/r.paul/proj/bayesopt-mcmc/experiments/venv/lib/python3.12/site-packages/pip/_vendor/pyproject_hooks/_in_process/_in_process.py", line 335, in main
          json_out['return_val'] = hook(**hook_input['kwargs'])
                                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
        File "/mnt/gpu_public/r.paul/proj/bayesopt-mcmc/experiments/venv/lib/python3.12/site-packages/pip/_vendor/pyproject_hooks/_in_process/_in_process.py", line 118, in get_requires_for_build_wheel
          return hook(config_settings)
                 ^^^^^^^^^^^^^^^^^^^^^
        File "/tmp/pip-build-env-ax2h20_q/overlay/lib/python3.12/site-packages/setuptools/build_meta.py", line 332, in get_requires_for_build_wheel
          return self._get_build_requires(config_settings, requirements=[])
                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
        File "/tmp/pip-build-env-ax2h20_q/overlay/lib/python3.12/site-packages/setuptools/build_meta.py", line 302, in _get_build_requires
          self.run_setup()
        File "/tmp/pip-build-env-ax2h20_q/overlay/lib/python3.12/site-packages/setuptools/build_meta.py", line 318, in run_setup
          exec(code, locals())
        File "<string>", line 203, in <module>
        File "<string>", line 174, in handle_ext_modules_general_os
        File "<string>", line 108, in pkgconfig
      OSError: pkg-config was not able to find any of the requested packages ['ipopt'] on your system. Make sure pkg-config can discover the .pc files associated with the installed packages.
      [end of output]

  note: This error originates from a subprocess, and is likely not a problem with pip.
error: subprocess-exited-with-error

× Getting requirements to build wheel did not run successfully.
│ exit code: 1
╰─> See above for output.

note: This error originates from a subprocess, and is likely not a problem with pip.

Using the recommended --use-pep517 option gives the exact same result. Any ideas, recommendations, fixes?

[moorepants]

The reasons your package isn't building is because it can't find an ipopt executable:

OSError: pkg-config was not able to find any of the requested packages ['ipopt'] on your system. Make sure pkg-config can discover the .pc files associated with the installed packages.
      [end of output]

[ripaul]

Oh, I see. Let me try that out. Though maybe that's something to emphasize a bit more in the documentation, at least in the PyPI description text?

[moorepants]

We have an entire page on installation here: https://cyipopt.readthedocs.io/en/stable/install.html

You are welcome to contribute improvements to that if something is unclear or missing.