"Use autotools.eclass instead of calling 'autoconf' directly." Reproducible: Always
Already fixed in newer ebuilds. In case of such trivial warnings please always check the newest ebuild before reporting bugs.
(In reply to comment #1) > In case of such trivial warnings please always check the newest ebuild before > reporting bugs. > Good point, apologies; was in middle of install so just filed it when it came up. Will bear it in mind for future.