I looked at the wc implementation, there's no way it's compatible with the GNU tools, how it handles wide characters, which is heavily ties to the idiosyncratic C implementation. I know because I once wrote a wc implementation in modern C++ for my own education, and that's where most of my time and code complexity went. Also, the C versions are devilishly fast, with all flags, with optimized code branches.
https://bytepawn.com/tag/wc.html