Documentation is unclear for Cross Compile on Windows

[geoeo]

Hello,
I am trying to get openblas to work on windows 10. The vcpkg section is fairly well written, but at the end there is a cross compiler section which is very unclear.

Is this necessary for using openblas on windows (I assume so, because its not working after the vcpkg steps).
If so, could you provide an example on how to use this with cargo/rustc?

Thank you!