My experience has been that in general LLVM + Rust do a very good job of making cross compilation painless. There is unpleasantness when cross compiling from a

My experience has been that in general LLVM + Rust do a very good job of making cross compilation painless. There is unpleasantness when cross compiling from an Apple host, but that's almost entirely limited to actually compiling rustc and some of the host tools. In terms of smoothing those edges over I think most of the patches I've submitted will land in 1.73 or 1.74. With that in mind if rxv64 is easy enough to build on an Intel Mac, then it should do fine on an ARM Mac as well. Obviously if you're talking about porting rxv64 to an ARM host, that's a whole different ball of wax.