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

https://github.com/ndowens/void-packages fotoxx
https://github.com/void-linux/void-packages/pull/17717

fotoxx: fix build on musl
I do not have a musl system, if someone can test to see if this will run fine

Signed-off-by: Nathan Owens <ndowens04@gmail.com>

A patch file from https://github.com/void-linux/void-packages/pull/17717.patch is attached