Please review my proposed meson-multlib.eclass. It's modeled on cmake-multilib.eclass and is useful for cutting large amounts of boilerplate from ebuilds of multilib packages using meson.
The diff stat of the 50 commits to switch the tree over (available in [1]) is 90 files changed, 307 insertions(+), 1296 deletions(-) [1] https://github.com/gentoo/gentoo/pull/20986