we should be able to detect when packages are missing LFS support and issue QA warnings which in turn should get developers to start fixing their packages
i implemented a scanelf based check for CrOS here:
i'll see about merging that into portage's existing checks. this bug is for discussion on the topic and to help people find a reference point.
Seems like it should work in metadata/install-qa-check.d/.
My WIP stuff on this: