How can I install an i386 package with up2date on a x86_64 / EM64T system?

Some third party applications require 32 bit versions of libraries to be installed when running on 64 bit system.

To install the latest version of the 32 bit package and automatically resolve dependencies, use the command:

up2date -u [package-name] --arch=i386

For example:

up2date -u xorg-x11-deprecated-libs --arch=i386

This ...