A few notes on compiling embedded targets with Rust.

The rustup installer supports adding targets:

• https://rust-lang.github.io/rustup/

  e.g. RUN rustup target add riscv32imac-unknown-none-elf

There are many embedded targets:

• https://doc.rust-lang.org/nightly/rustc/platform-support.html

  e.g. riscv32imac-unknown-none-elf and thumbv6m-none-eabi are Tier 2

A bare-metal no_std “crate attribute” is defined:

• https://docs.rust-embedded.org/book/intro/no-std.html
• https://stackoverflow.com/questions/27454761/what-is-a-crate-attribute-and-where-do-i-add-it

With no_std:

• A panic_handler is needed https://doc.rust-lang.org/nomicon/panic-handler.html
• https://os.phil-opp.com/freestanding-rust-binary/

Using inline Assembler:

• https://doc.rust-lang.org/beta/unstable-book/library-features/asm.html
• https://github.com/rust-lang/rust/issues/72016
• https://docs.rust-embedded.org/embedonomicon/asm.html

Linker for bare-metal:

• https://docs.rust-embedded.org/embedonomicon/memory-layout.html

Raw Pointers

• https://docs.rust-embedded.org/embedonomicon/main.html
• https://doc.rust-lang.org/book/ch19-01-unsafe-rust.html

Cargo Build System:

• https://doc.rust-lang.org/cargo/reference/manifest.html
• https://github.com/rust-embedded/cargo-binutils#readme