Warning on Windows/Ninja
See [this CDash build](https://open.cdash.org/viewBuildError.php?type=1&buildid=4751115): When compiling `testConsoleBuf.cxx` and `testConsoleBufChild.cxx`: ``` cl : Command line warning D9002 : ignoring unknown option '/utf-8' ``` It's added manually, but the compiler does pass the version checks in the file. Are the version files insufficient?
issue