What to do with Mono (and msbuild) on ARM64?

[Mojca Miklavec]

Hi,

One of the projects that I'm working on requires mono as a build dependency.
At the moment mono is broken on ARM64 in MacPorts (I suspect that it
works under HomeBrew).

I fixed it:
    https://github.com/macports/macports-ports/pull/14952/
but there's a comment in the port saying
    > please update msbuild when updating mono
and I'm unable to cope with that one (I don't know how to update msbuild).

While I can handle that local patch for myself, I would hate to send
instructions to other developers working on macs explaining how to
patch mono (or abandon the idea of using macports) if they want to
build the sources.

Would it be acceptable to upgrade just mono without msbuild to avoid
having a broken mono on M1?

Mojca