aarch64-unknown-illumos and x86_64-unknown-illumosTier: 2/3
illumos, is a Unix operating system which provides next-generation features for downstream distributions, including advanced system debugging, next generation filesystem, networking, and virtualization options.
The target supports host tools.
The illumos target supports std and uses the standard ELF file format.
x86_64-unknown-illumos is a tier 2 target with host tools. aarch64-unknown-illumos is a tier 3 target.
These targets can be built by adding aarch64-unknown-illumos and x86_64-unknown-illumos as targets in the rustc list.
Rust ships pre-compiled artifacts for the x86_64-unknown-illumos target. Rust does not ship pre-compiled artifacts for aarch64-unknown-illumos, it requires building the target either as shown above or using -Zbuild-std.
Tests can be run in the same way as a regular binary.
The target supports C code.
The illumos project makes available prebuilt sysroot artefacts which can be used for cross compilation. The official Rust binaries are cross-compiled using these artefacts.