On x86_64, libraries are looked for in the wrong path

[Ra]

I have a 64bit version of Ubuntu 19.10. I also have hp-lip ver. 3.19.5, installed from the official Ubuntu repository.

The installation of the printer fails. In particular, after asking you to install the plugins, the installation stalls for a very long time, then it tells you that the installation of the plugin was successfull, and then, when coming back to the main windows, it tells you that

"error: The device you are trying to setup requires a binary plug-in. Some functionalities may not work as expected without plug-ins. Please run 'hp-plugin' as normal user to install plug-ins. Visit http://hplipopensource.com for more infomation.

error: hp-setup failed. Please run hp-setup manually."

As you can see by running "hp-setup -g &> ~/hp-setup.log" ans exploring the log files, the installation does not find some libraries. In particular, by running "cat hp-setup.log | grep "file is not present", you discover that hp-lip is looking for the libraries into "/usr/lib64/x86_64-linux-gnu" while the correct path is "/usr/lib/x86_64-linux-gnu"

Running "sudo ln -s /usr/lib/x86_64-linux-gnu /usr/lib64" is a temporary wrokaround that make the installation succeed.

See also this askubuntu.com thread: https://askubuntu.com/questions/1151526/cannot-install-hp-printer-plugin-installation-not-successfull/1159808#1159808