Created attachment 496988 [details, diff] don't generate version string accessing git in releases. the RELEASE=$(shell ) which calls ./getversion evaluates empty if there is an .git above ${WORKDIR}, i.e. a /.git. The resulting calls to pod2man --release= fails with an missing argument error. Work around: move /.git to /.git_ . Fix: don't access outside ${WORKDIR}.
see bug 632318 for emerge --info and build.log
It seems to me that this setup will cause more issues than just this bug, but I have no problem applying the patch since we can be sure that we won't work with a git repo in this case. Added to munin-2.0.33-r1