You have a few things going on here. You updated perl but failed to run "perl-cleaner --all" (or --reallyall). Until you do, upower isn't the only package that will fail to compile. Please take care of that first and then see how things go. On the note of upower, because of the work I have been doing in Funtoo, upower-pm-utils is no longer needed. You can simply build upower with the deprecated USE flag and achieve the same effect. This is done for you if you are using GNOME and have enabled the mix-in.
Secondly, net-analyzer/snortsam-2.70 does indeed fail to build, I will be taking care of this issue over at FL-1408.