The build didn't work for me at first. Don't know if stuff works, but it compiles! Workaround, if slv2 doesn't compile set-fPIC: CFLAGS="-march=nocona -O2 -pipe -fomit-frame-pointer -fPIC" \ CXXFLAGS="${CFLAGS}" emerge -uDvNa slv2 then: ln -s /usr/lib64/pkgconfig/slv2.pc /usr/lib64/pkgconfig/libslv2.pc emerge ingen stop emerge ingen after src unpack ln -s /usr/lib64 \ /var/tmp/portage/media-sound/ingen-9999/work/ingen-9999/lv2/lv2/osc/.libs ln -s /usr/lib64 \ /var/tmp/portage/media-sound/ingen-9999/work/ingen-9999/redlandmm/src/.libs restart emerge Hopefully complete.