I have available in my overlay an update to wxsvg: https://cgit.gentoo.org/repo/user/ssnb.git/tree/media-libs/wxsvg/wxsvg-1.5.22.ebuild Updated current Gentoo portage ebuild to EAPI 7 (used as reference). Dependencies reviewed from Arch pkgbuild. I didn't do a complete review to required dependency versions, since they are missing in Arch.
pull request created: https://github.com/gentoo/gentoo/pull/15297