Similar to e.g. bug #675218, it appears so unless there's something specific to openldap which I doubt.
/usr/lib64/openldap/slapd requires libltdl.so.7, which is provided by dev-libs/libltdl, not sys-devel/libtool. It works because sys-devel/libtool has a rdepend on the library provided but it doesn't seem correct.
*** Bug 743586 has been marked as a duplicate of this bug. ***