I feel the pain in your comment.

I too have been burned by "cross-platform" tooling. What I've learned is the more complex your project is, the less likely it is to have simple cross compliation.

But with that huge caveat, I'll say I've had a better time doing cross comp on dotnet than I have rust. Either of them are infinitely better than learning cmake though. That's definitely just my amateur take though. I'm sure smarter people will tell you I'm wrong.