See attached build log. (Please do not complain about the need for looking at the build log until you can provide an easy way to open bugs with the correct data picked out of a tinderbox log. Thanks.)
Created attachment 242103 [details] Build log
Created attachment 244975 [details, diff] fixese LDFLAGS issue, adds die statements and a few othe cleanups
*mu-conference-0.8 (12 Aug 2013) 12 Aug 2013; Manuel Rüger <mrueg@gentoo.org> +mu-conference-0.8.ebuild: Version bump. Respect CC, LDFLAGS, AR, RANLIB. Add missing dep on pkgconfig. Fixes bug #331895 bug #269970.