There's a closed pull request on the void-packages repository

s-nail: update to 14.9.19.
https://github.com/void-linux/void-packages/pull/22612

Description:
The patch for cross-building comes from [here](http://git.sdaoden.eu/cgit/s-nail.git/commit/?id=5b352bd92fbfd9f4f84fc0aa97a22b1aa426b641).