maturin failed Caused by: Failed to build a native library through cargo

[reallyusefulengine]

Bug Description

when i run the command "maturin develop" in the virtual env I get the following error:

(py_rust)@192-168-1-10 py_rust % maturin develop
🔗 Found pyo3 bindings
🐍 Found CPython 3.9 at /Users//.local/share/virtualenvs/py_rust-QUdKXKyu/bin/python
💥 maturin failed
  Caused by: Failed to build a native library through cargo

Im using an m1 mac

Your Python version (python -V)

Python 3.9.13

Your pip version (pip -V)

pip 22.1.1 from /opt/homebrew/lib/python3.9/site-packages/pip (python 3.9)

What bindings you're using

pyo3

Does cargo build work?

• Yes, it works

If on windows, have you checked that you aren't accidentally using unix path (those with the forward slash /)?

• Yes

Steps to Reproduce

create the file lib.rs:

use pyo3::prelude::*;
use serde::{Deserialize, Serialize};


#[derive(Deserialize, Debug)]
struct Data {
    name: String,
    value: i32
}

fn sum(input: &str) -> i32 {
    let parsed: Data = serde_json::from_str(input).unwrap();
    parsed.name.len() as i32 + parsed.value
}

#[pymodule]
fn py_rust(_py: Python, m: &PyModule) -> PyResult<()> {
  Ok(())
}

toml:

[package]
name = "py_rust"
version = "0.1.0"
edition = "2021"

# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html

[dependencies]
pyo3 = { version = "0.16.5", features = ["extension-module"] } 
serde = { version = "1.0", features = ["derive"] }
serde_json = "1.0"

create the virtual env and run maturin develop

[messense]

https://maturin.rs/tutorial.html

[lib]
# "cdylib" is necessary to produce a shared library for Python to import from.
crate-type = ["cdylib"]

You missed the crate-type = ["cdylib"] configuration. Although we should improve the error message. Ref #881

[reallyusefulengine]

Thank you for such a quick response, that really fixed the error so much appreciated.