Am Wed, 24 Mar 2010 10:24:23 -0400 schrieb David Rosenstrauch <darose@darose.net>:
Pacman does not upgrade AUR packages. Only packages from core, extra, or community. So you need to manually update AUR packages.
Those dependencies need to be built and installed on PC1 from AUR before the "main" AUR package is built anyway. So they can also be moved to PC2 as binary packages and should be installed automatically by pacman when the "main" package is installed on PC2.
So what you should do is create an account for yourself on the AUR, then log in to the site, go to the page for that package, and click "notify". Then you'll be notified when new messages appear on that package's AUR page - and so you'll find out when the PKGBUILD has been upgraded to a new version.
Usually you're not informed by the notify feature when an AUR package is updated, because most maintainers don't write comments, when they update their package. So you should use one of the wrapper scripts like yaourt, aurbuild etc. to search for updates. Heiko