espup installed, but no xtensa target available

[Apitronix]

Bug description

When I run rustc --print target-list, no xtensa target is shown. Furthermore, when I try to build this demo project using the command cargo build, then it fails saying that no xtensa-esp32-espidf target is found.

To Reproduce

1. espup tool installed using the command cargo install espup,
2. espup tool is stored in ".cargo/bin" directory but not in "PATH" env var by default,
3. espup install command used,
4. source export-esp.sh done.

Expected behavior

Being able to compile this code, and flash it on ESP32-WROOM32 chip.

Environment

• OS: archinux
• espup version: 0.2.3

[SergioGasquez]

Hi @Apitronix! It looks like you are not using the proper channel. Are you overriding the esp toolchain? You should probably use rustc +esp --print target-list or cargo +esp build. See https://rust-lang.github.io/rustup/overrides.html#the-toolchain-file for more information on toolchain overriding.

[SergioGasquez]

Hi @Apitronix, do you have any update?

[willlma]

Hi @SergioGasquez, I'm running into the same issue. When I run rustup toolchain list, the output is

stable-aarch64-apple-darwin (default)
nightly-aarch64-apple-darwin
esp (override)

which implies that esp is the chosen toolchain. When I try to run rustup target list --installed, I get

error: toolchain 'esp' does not support components: esp is a custom toolchain

When I try cargo +esp build, I get

error: no such command: `+esp`

	Cargo does not handle `+toolchain` directives.
	Did you mean to invoke `cargo` through `rustup` instead?

(I don't know what invoking cargo through rustup means) and when I try rustc +esp --print target-list the error is

error: toolchain 'esp' does not support components: esp is a custom toolchain

I'm a bit stuck. I've followed the instructions from the README and the Rust on ESP book pretty closely. I'm trying to set up a project using the esp-rs/esp-idf-template incuding the standard library, and one thing that confuses me is that the template's cargo.toml refers to the target as xtensa-esp32-espidf whereas espup installs xtensa-esp-elf.

Thanks for any help

[SergioGasquez]

How did you install Rust? Did you use any package manager? https://esp-rs.github.io/book/installation/rust.html

Also a good test would be invoking cargo with the full path: $HOME/.rustup/toolchains/esp/bin/cargo build

and one thing that confuses me is that the template's cargo.toml refers to the target as xtensa-esp32-espidf whereas espup installs xtensa-esp-elf

There are two different things,xtensa-esp32-espidf is the Rust target triple while xtensa-esp-elf is the GCC toolchain used for linking the project

[willlma]

Thanks for the tip. I installed Rust a few months ago so didn't remember, but I see it in brew list, so that must be how I installed it. Will reinstall.