There is an updated pull request by Johnnynator against master on the void-packages repository

https://github.com/Johnnynator/void-packages host_subpkg
https://github.com/void-linux/void-packages/pull/15493

[DO NOT MERGE THIS IS BROKEN] common/build_dependencies.sh: don't ingore missing subpkgs in hostdeps
Currently missing hostmakedepends that are a subpkg are just ignored which leads to failing builds in theses cases if they are needed for cross compiling

e.g. https://build.voidlinux.org/builders/aarch64-musl_builder/builds/22678/steps/shell_3/logs/stdio

A patch file from https://github.com/void-linux/void-packages/pull/15493.patch is attached