[Pkg-cmake-team] Bug#1041633: cmake: FindPython.cmake returns /usr/local/lib/python3.11/dist-packages for Python_SITEARCH

[Sebastiaan Couwenberg]

Changes between bookworm and sid:

cmake 3.25.1:

  ``Python_SITELIB``
    Third-party platform independent installation directory.

    Information returned by
 
``distutils.sysconfig.get_python_lib(plat_specific=False,standard_lib=False)``
    or else ``sysconfig.get_path('purelib')``.
  ``Python_SITEARCH``
    Third-party platform dependent installation directory.

    Information returned by
 
``distutils.sysconfig.get_python_lib(plat_specific=True,standard_lib=False)``
    or else ``sysconfig.get_path('platlib')``.

cmake 3.27.0:

  ``Python_SITELIB``
    Third-party platform independent installation directory.

    Information returned by ``sysconfig.get_path('purelib')``.
  ``Python_SITEARCH``
    Third-party platform dependent installation directory.

    Information returned by ``sysconfig.get_path('platlib')``.

On bookworm distutils is still used which returns:

  >>> distutils.sysconfig.get_python_lib(
          plat_specific=False,
          standard_lib=False,
      )
  '/usr/lib/python3/dist-packages'

On sid sysconfig is used which results:

  >>> sysconfig.get_path('platlib')
  '/usr/local/lib/python3.11/dist-packages'

To get the right path for the Debian python3 interpreter,
you need to add 'deb_system':

  >>> sysconfig.get_path('platlib', 'deb_system')
  '/usr/lib/python3/dist-packages'

Kind Regards,

Bas

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