That's how target triples work. http://wiki.osdev.org/Target_Triplet http://wiki.osdev.org/Target_Triplet The "unknown" is the vendor field. Most linux OSes d

That's how target triples work. http://wiki.osdev.org/Target_Triplet http://wiki.osdev.org/Target_Triplet The "unknown" is the vendor field. Most linux OSes don't have a "vendor". Target triples are of the form arch-vendor-kernel, and the -kernel is sometimes in the form -kernel-abi) So you can have x86_64-pc-windows-gnu or x86_64-pc-windows-msvc or x86_64-apple-darwin with the vendor field set. Most of the OSes with non-unknown vendors already have Rust binaries, so most new platforms will be unknown.