message: OSX: Fix JSON Compile Issue
  Cast to `std::string` to avoid ambiguity in `std::string::compare`.
diff: @@ -124,7 +124,7 @@ void JsonWorker::ParseJson()
  }
  auto ioO = jsonObj.find("io");
  - auto ioName = (*ioO)["name"];
  + std::string const ioName = (*ioO)["name"];
  if (m_SourceReader->m_IO.m_Name.compare(ioName) != 0)
  throw std::ios_base::failure("invalid query io. Expecting io name = " +
  m_SourceReader->m_IO.m_Name);
  