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Broken build of RustPython on wasip2 #6891
Description
Summary
Try to embed RustPython as a wasm component, but fail to build it on wasm32-wasip2 target.
Details
Environment
- rust: 1.95.0-nightly (85eff7c80 2026-01-15)
- RustPython: 2025-11-10-main-55
- OS: Debian GNU/Linux 12
Reproduction
cargo build -rError goes as
error[E0425]: cannot find value `CLOCK_PROCESS_CPUTIME_ID` in crate `libc`
--> /root/.cargo/git/checkouts/rustpython-63090cdce5e18442/9792001/vm/src/stdlib/time.rs:432:42
|
432 | if libc::clock_gettime(libc::CLOCK_PROCESS_CPUTIME_ID, time.as_mut_ptr()) == -1 {
| ^^^^^^^^^^^^^^^^^^^^^^^^ not found in `libc`
For more information about this error, try `rustc --explain E0425`.
error: could not compile `rustpython-vm` (lib) due to 1 previous errorRelated Code
lib.rs
#[cfg(target_arch = "wasm32")]
mod wasm;
#[cfg(target_arch = "wasm32")]
pub use wasm::*;
use anyhow::Result;
use rustpython_vm::{Interpreter, PyResult, VirtualMachine};
/// Run Python code and return the result
///
/// # Arguments
/// * `code` - The Python code to execute
///
/// # Returns
/// The result of the Python code execution as a string
///
/// # Errors
/// Returns an error if the Python code execution fails
pub fn run(code: &str) -> Result<String> {
let interpreter = Interpreter::new_without_stdlib(None);
let vm = &interpreter.vm;
// Execute the Python code and get the result
let result: PyResult = vm.run_code_string(code, "<embedded>".to_owned(), None);
match result {
Ok(value) => {
// Convert the result to string representation
let str_value = value.to_repr(vm);
Ok(str_value.to_string())
}
Err(e) => Err(anyhow::anyhow!("Python execution error: {}", e.to_string(vm))),
}
}wasm.rs
mod bindgen {
wit_bindgen::generate!();
use crate::App;
export!(App);
}
use bindgen::exports::sammyne::rust_python::api::Guest;
pub struct App;
impl Guest for App {
fn run(code: String) -> Result<String, String> {
crate::run(&code).map_err(|err| err.to_string())
}
}I made github repository https://github.com/sammyne/rust-python-broken-build-on-wasip2 to ease reproduction.
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