Since libltdl has its own package instead of being part of libtool packages using libltdl at runtime should RDEPEND on libltdl instead of libtool. This allows cleaner dependencies and leaner set of installed packages for binpkg installs. Reproducible: Always
Created attachment 400690 [details, diff] Proposed patch adjusting the dependency
+ 11 Apr 2015; Pacho Ramos <pacho@gentoo.org> -libcanberra-0.30-r1.ebuild, + libcanberra-0.30-r4.ebuild: + Needs dev-libs/libltdl and not full libtool (#545736 by Bruno), drop old +