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Sega genesis development

And Amiga, Atari, 68k-Macintosh etc.

FWIW, there is an out-of-tree m68k backend for LLVM [1]. I have already done some experimental work on Rust for m68k based on this backend [2].

> [1] https://github.com/M680x0/M680x0-llvm/

> [2] https://github.com/glaubitz/rust/tree/m68k-linux

Also, GCC has Xtensa ISA used on ESP8266/ESP32.

LLVM Xtensa port is in progress: https://github.com/espressif/llvm-xtensa

Lots of things are "in progress" (including rust support for gcc code generation, heh). But gcc has production-ready, mature backends for a ton of architectures that LLVM doesn't. It's a real feature.

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