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

https://github.com/tornaria/void-packages giac
https://github.com/void-linux/void-packages/pull/34099

giac: update to 1.7.0.39, adopt.
- I tested the changes in this PR: **briefly**

A patch file from https://github.com/void-linux/void-packages/pull/34099.patch is attached