It mostly scores a "YES", where there are footnotes. AFAIK all of these things are being worked on. > Does it support all of the following architectures? x86_6

It mostly scores a "YES", where there are footnotes. AFAIK all of these things are being worked on. > Does it support all of the following architectures? x86_64, ARM, MIPS, powerPC It does: https://doc.rust-lang.org/book/getting-started.html#tier-2 https://doc.rust-lang.org/book/getting-started.html#tier-2. Granted, while tier 2 support is pretty good, it isn't the same level of support as the tier 1 platforms. > Does it support soft float? From running `rustc -C help`: -C soft-float -- use soft float ABI (*eabihf targets only) > Can it link against uclibc instead of glibc? It can link against musl, but I'm not sure whether that would enable uclibc. Probably? > Can it link against arbitrary C libraries? Yes. > Can I use a C library's header.h file without having to hand-recode it to Rust? You can use something like rust-bindgen (https://github.com/Yamakaky/rust-bindgen https://github.com/Yamakaky/rust-bindgen) which will work with a minimal amount of cleanup afterwards in my experience. Still not a resounding yes, though. > Will the code I write now continue to compile 5 years from now? Yes. See https://blog.rust-lang.org/2014/10/30/Stability.html https://blog.rust-lang.org/2014/10/30/Stability.html for more about the plans/policies/etc.