glibmm24-devel provides perl(Util) EQ 0 1.00 fedora-ds-base provides perl(Util) required by: glibmm24-devel - 2.13.9-2.fc8.i386 required by: fedora-ds-base - 1.1.0-1.2.fc8.i386
Hmm, ok. So the gtkmm stack uses a Perl-based code generation system (the C++ source code is generated automatically from source templates). It turns out that the automake setup for some reasons installs the Perl autogeneration scripts under /usr/lib/glibmm-2.4/proc, and the perl files are picked up automatically by RPM, and therefore pollute the RPM perl namespace. I don't know why the perl files are installed since they're not really meant to be used by developers. I'll check upstream. I'll just rm -r /usr/lib/glibmm-2.4/proc after installation and push an update.
"They are useful for creating other *mm projects, yes. But it's not awful if they are not installed by the distro." If someone requests it, I'll package them separately with an extra namespace. Removed for now.