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

https://github.com/ypsvlq/void-packages json-c++
https://github.com/void-linux/void-packages/pull/35977

json-c++: update to 3.10.5.
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#### Testing the changes
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A patch file from https://github.com/void-linux/void-packages/pull/35977.patch is attached