We already allow address sanitizer as ALLOWED_FLAGS, I guess that add -static-libasan won't hurt. Thanks
I'm not sure this is really a 'safe' flag in an ebuild trying to strip anything likely to break the build.
I thought about it a bit more and I guess we can. But we should add https://lists.gnu.org/archive/html/libtool-patches/2023-05/msg00001.html to elt-patches and libtool first.