/var/log/portage/dev-cpp:glibmm-2.16.1:20080610-122018.log:creating test /var/log/portage/dev-cpp:glibmm-2.16.1:20080610-122018.log:creating test
reported upstream in: http://bugzilla.gnome.org/show_bug.cgi?id=538229
Fixed in portage for the bump to 2.16.4. Thanks