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

https://github.com/tranzystorek-io/void-packages cppman
https://github.com/void-linux/void-packages/pull/43913

cppman: update to 0.5.6
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#### Testing the changes
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A patch file from https://github.com/void-linux/void-packages/pull/43913.patch is attached