There is a new pull request by butonic against master on the void-packages repository

https://github.com/butonic/void-packages patch-1
https://github.com/void-linux/void-packages/pull/24367

update barrier to 2.3.3
Upstream moved to a git submodule for gtest and gmock. I took https://github.com/void-linux/void-packages/blob/master/srcpkgs/wabt/template as an example how to download and move gtest to the proper location.

This works for me locally. Let me know if anything needs changing.

A patch file from https://github.com/void-linux/void-packages/pull/24367.patch is attached