[Pkg-rust-maintainers] Bug#989844: Cross-compilation support (please package more libstd-rust-dev-*)

[Matt Corallo]

Package: src:rustc
Version: 1.48.0+dfsg1-2

It would be nice to support cross-compilation in the Debian rustc builds, both across-platforms targeting linux and for 
additional targets in the host platform (eg apple-darwin, assuming its possible to build std without the proprietary 
apple sysroot), or freebsd/android/etc. I assume the biggest requirement there is just packaging the libstd.