Failed to build mod-wsgi-standalone

[João Carlos]

I'm trying to configure mod_wsgi with apache in a virtual environment by applying the command (pip install mod_wsgi-standalone) as per the documentation  but I run into the following problem :

Building wheel for mod-wsgi-standalone (PEP 517) ... error

ERROR: Command errored out with exit status 1:

   command: /home/joao/.virtualenvs/kws/bin/python /home/joao/.virtualenvs/kws/lib/python3.8/site-packages/pip/_vendor/pep517/_in_process.py build_wheel /tmp/tmpj81kyrf1

       cwd: /tmp/pip-install-zpx12xpg/mod-wsgi-standalone_fb9012f935524a77bd05f034639de925

  Complete output (181 lines):

  

  WARNING: The Python installation you are using does not appear to have

  been installed with a shared library, or in the case of MacOS X, as a

  framework. Where these are not present, the compilation of mod_wsgi may

  fail, or if it does succeed, will result in extra memory being used by

  all processes at run time as a result of the static library needing to

  be loaded in its entirety to every process. It is highly recommended

  that you reinstall the Python installation being used from source code,

  supplying the '--enable-shared' option to the 'configure' script when

  configuring the source code prior to building and installing it . . .

How can I solve ?

[Graham Dumpleton]

The message tells you what you need to do.

"""

  It is highly recommended
  that you reinstall the Python installation being used from source code,
  supplying the '--enable-shared' option to the 'configure' script when
  configuring the source code prior to building and installing it

"""

The problem is that the Python installation you created the virtual environment from must have been installed by you from source code and not using an existing system binary package. In building it from source code you didn't configure it so it would create a shared library.

For details on enabling creation of a shared library and other tips about building Python from source code yourself, see:

http://blog.dscpl.com.au/2015/06/installing-custom-python-version-into.html

Also see:

https://modwsgi.readthedocs.io/en/master/user-guides/installation-issues.html#mixing-32-bit-and-64-bit-packages

Graham

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