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

https://github.com/karl-nilsson/void-packages spdlog
https://github.com/void-linux/void-packages/pull/24789

spdlog: update to 1.8.0.
ping @Johnnynator 

SPDLOG_BUILD_BENCH now defaults to OFF

A patch file from https://github.com/void-linux/void-packages/pull/24789.patch is attached