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Unfortunately, the upstream zig toolchain (LLVM codegen) does not support the Xtensa architecture (opaque CPU features), but it is possible to use riscv32 for esp32 from the C2/C3/C6, H2 and the new P4 release.

I'm currently working on a fork of the zig toolchain with espressif-LLVM to support Xtensa.[1] It is now possible to test with esp-idf instead of microzig for baremetal (Blink) yet.

[1] https://gist.github.com/kassane/7bdb782a1984d0c6581ae7b44e1f...

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Yeah I remember reading about it's relation to LLVM issues etc. I also think there was another (languishing) fork of the entire zig repo which had some support for Xtensa which I couldn't find at the time, but I found it.

https://github.com/ominitay/zig/tree/xtensa

Edit: I see you are the same kassane from the GitHub thread. Thank you for your efforts on Xtensa support! Would be great to have it out-of-the-box at some point.

So don't wait. Tarballs already available for testing[1] and an example using esp-idf.[2]

[1]: https://github.com/kassane/zig-espressif-bootstrap/releases

[2]: https://github.com/kassane/zig-esp-idf-sample

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