Need help solving linker error when using embassy

[gyzerok]

Hello everyone!

I am trying to make a project using esp32c3-hal and embassy. I generated it from the template and now copy-pasted code from the embassy hello world example into it. However I can't make it build and getting the following error.

  = note: rust-lld: error: undefined symbol: _hart_stack_size
          >>> referenced by esp_riscv_rt.b5f8eb9b64916248-cgu.0
          >>>               esp_riscv_rt-2f61b9ed771f9234.esp_riscv_rt.b5f8eb9b64916248-cgu.0.rcgu.o:(.init+0x9A) in archive /Users/f.nezhivoi/Code/private/waterplant/target/riscv32imc-unknown-none-elf/debug/deps/libesp_riscv_rt-2f61b9ed771f9234.rlib
          >>> referenced by esp_riscv_rt.b5f8eb9b64916248-cgu.0
          >>>               esp_riscv_rt-2f61b9ed771f9234.esp_riscv_rt.b5f8eb9b64916248-cgu.0.rcgu.o:(.init+0x9E) in archive /Users/f.nezhivoi/Code/private/waterplant/target/riscv32imc-unknown-none-elf/debug/deps/libesp_riscv_rt-2f61b9ed771f9234.rlib

Here is the dependency section of my Cargo.toml. What am I missing?

[dependencies]
hal = { package = "esp32c3-hal", version = "0.11.0", features = ["embassy", "embassy-time", "embassy-time-systick", "async"]}
esp-backtrace = { version = "0.7.0", features = ["esp32c3", "panic-handler", "exception-handler", "print-uart"] }
esp-println       = { version = "0.5.0", features = ["esp32c3"] }
embassy-executor = { version = "0.2.1", features = ["nightly", "integrated-timers", "arch-riscv32", "executor-thread"] }
embassy-time = { version = "0.1.2", features = ["nightly", "tick-hz-16_000_000"] }
static_cell = "1.2.0"

Thank you!

[bjoernQ]

Have you tried cargo update and cargo clean?

I removed _hart_stack_size very recently but that is not in 0.11.0 🤔 and from the code snippet you are not patching dependencies, right? So, this is a bit weird

[gyzerok]

you are not patching dependencies, right?

I am almost complete beginner with this new and exciting embedded world, so I am not exactly sure what I am doing :) So I assume the answer is "no", but not entirely sure.

Tried doing cargo clean && cargo update && cargo run and ended up with the same error. Any more info I can give you which would help?

[gyzerok]

Here I pushed my code to the repo if it helps: https://github.com/gyzerok/waterplant

[bjoernQ]

Ah .... you don't need to copy build.rs and the ld folder. esp-hal takes care of all of this for you

So just

rm -rf ld
rm build.rs
cargo build

in your repository should work

[gyzerok]

Oh, that helped, thank you so much!