Mainline support (in Rust proper) for ESP8266/ESP32 would require an Xtensa LLVM backend. There was some rumours about it being developed by ESP devs, but later

Mainline support (in Rust proper) for ESP8266/ESP32 would require an Xtensa LLVM backend. There was some rumours about it being developed by ESP devs, but later cancelled. Not aware of any serious other attempts? I did find this, which has a single commit (but quite a lot of code): https://github.com/jdiez17/llvm-xtensa https://github.com/jdiez17/llvm-xtensa Without an LLVM backend, could the alternative Rust implementation mrustc that compiles Rust to C. It seems people are working on this for the ESP and having some success: https://github.com/emosenkis/esp-rs https://github.com/emosenkis/esp-rs