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I was shocked when I found out ESP wasn't ARM. It's a weird arch you never heard of. They distribute an ancient Gcc in their SDK, and at least Debian only packages an ancient Gcc for it. Don't know if anybody packages a current-ish compiler. Don't know how big a hassle it is to build one.

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They're almost up to date with LLVM: https://github.com/espressif/llvm-project/

There is reasonable GCC support for the ESP Vertex arch, and they seem to be migrating toward RISC-V, so the current ESP32-C3 uses RISC-V arch. But they still have another Vertex part in the works.

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