Rust

Rust is Article description::a general-purpose, multi-paradigm, compiled programming language.

USE flags
A recommended use flag to enable is, but it can lead into a failed build due to possible LLVM version differences

Emerge
Emerge the package base

There's also an binary package provided due to the long compile times.

Distcc MAKEOPTS
Rust does not support distcc compiling and may require local package.env defined to avoid excessive IO consumption when building on distcc tuned hosts. (i.e. MAKEOPTS="-j30 -l4", 30 is great than 4 local CPU cores )

--local-load is not honoured, so you must pass an appropriate --jobs value in relation to the locally available build resources.