I just updated a bunch of outdated ports by simply running portupgrade -a. This seemed to work fine. As far as I could see in /usr/ports/UPDATING, none of the outdated packages needed special attention. But how do I check if there are any breakages that require certain packages to be recompiled?
For example, under Gentoo I used revdep-rebuild for this.
For example, under Gentoo I used revdep-rebuild for this.