verylowfreq/rust_on_m5stack_example

README.md missing `+esp` toolchain argument

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cgranade commented

When running cargo build inside the devcontainer for this example, stable is the default toolchain such that an error results when building the crate:

root@e2f1491b808e:/workspaces/rust_on_m5stack_example# cargo build
error: failed to run `rustc` to learn about target-specific information

Caused by:
  process didn't exit successfully: `rustc - --crate-name ___ --print=file-names --target xtensa-esp32-espidf --crate-type bin --crate-type rlib --crate-type dylib --crate-type cdylib --crate-type staticlib --crate-type proc-macro --print=sysroot --print=cfg` (exit status: 1)
  --- stderr
  error: Error loading target specification: Could not find specification for target "xtensa-esp32-espidf". Run `rustc --print target-list` for a list of built-in targets

The error is resolved by running cargo +esp build instead to use the toolchain provided by the espressif/idf-rust-examples Docker image listed in the FROM line of this repo's Dockerfile.

Thanks for making this awesome example! 💕

verylowfreq commented

Thank you very much!

I've committed changes including the update of README.

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