Pat Le Cat: Please focus on one issue at a time. I'm tempted to close this issue as "works for me", and let you start over reporting one single issue that we then try to resolve.

In any case, ignore python3.dll. It's meant for a different use case than yours.

As for your initial report: Please report the exact version of mingw64 that you have been using, and the exact command line that you were trying to use.