From @mbargull > We could use the latest source from https://github.com/apple-oss-distributions/libiconv/blob/libiconv-64/libiconv/lib/utf8mac.h which is from https://github.com/apple-oss-distributions/libiconv/commit/d5939135328109e5f591a4fa71faf71a24aa3917.patch (alternatively we could also add this as an additional source with url: https://raw.githubusercontent.com/apple-oss-distributions/libiconv/libiconv-64/libiconv/lib/utf8mac.h, folder: lib})
From @mbargull