Added a warning for #4132

.cargo/config.toml

@@ -1,10 +1,9 @@
-[build]
-# This is needed so the module is compiled with atomics support (shared memory)
-rustflags = '-Ctarget-feature=+atomics,+bulk-memory'
-
-[target.wasm32-unknown-unknown]
+[target.'cfg(target_arch = "wasm32")']
 # Use "wasmer" for running tests when compiled to WebAssembly
 runner = ["wasmer", "run"]
+# This is needed so the module is compiled with atomics support (shared memory)
+# We add the `-no-check-features` linker args because otherwise one of the modules fails to link
+rustflags = '-Ctarget-feature=+atomics,+bulk-memory -Clink-args=--no-check-features'
 
 [unstable]
 # We want to make sure std gets built with atomics, too

lib/wasix/Cargo.toml

@@ -147,10 +147,7 @@ sys-thread = ["tokio/rt", "tokio/time", "tokio/rt-multi-thread", "rayon"]
 # Deprecated. Kept it for compatibility
 compiler = []
 
-js = [
-    "virtual-fs/no-time", "virtual-net/remote", "getrandom/js", "chrono",
-    "wasm-bindgen-futures", "wasm-bindgen", "js-sys", "web-sys", "base64"
-]
+js = ["virtual-fs/no-time", "virtual-net/remote", "getrandom/js", "chrono", "wasm-bindgen-futures", "wasm-bindgen", "js-sys", "web-sys", "base64"]
 js-default = ["js"]
 test-js = ["js", "wasmer/wat"]
 
@@ -164,6 +161,9 @@ logging = ["tracing/log"]
 disable-all-logging = ["tracing/release_max_level_off", "tracing/max_level_off"]
 enable-serde = ["typetag", "virtual-fs/enable-serde", "wasmer-wasix-types/enable-serde"]
 
+[build-dependencies]
+rustc_version = "0.4.0"
+
 [package.metadata.docs.rs]
 features = [
     "wasmer/sys", "webc_runner_rt_wcgi",

lib/wasix/build.rs

@@ -0,0 +1,28 @@
+use std::process::{Command, Stdio};
+
+use rustc_version::{Channel, VersionMeta};
+
+fn main() {
+    if std::env::var("CARGO_FEATURE_JS").is_ok() {
+        let rustc = std::env::var("RUSTC").unwrap_or_else(|_| "rustc".to_string());
+        let mut cmd = Command::new(rustc);
+        cmd.stdout(Stdio::piped())
+            .stderr(Stdio::piped())
+            .current_dir(env!("CARGO_MANIFEST_DIR"));
+
+        let VersionMeta {
+            channel,
+            short_version_string,
+            ..
+        } = VersionMeta::for_command(cmd).unwrap();
+
+        if channel != Channel::Nightly {
+            println!(
+                "cargo:warning={} was compiled with {short_version_string}, \
+                but the \"js\" feature requires nightly features. \
+                See https://github.com/wasmerio/wasmer/issues/4132 for more context.",
+                env!("CARGO_PKG_NAME"),
+            );
+        }
+    }
+}

lib/wasix/tests/web.rs

@@ -5,10 +5,7 @@
 //! API.
 #![cfg(all(target_arch = "wasm32", feature = "js"))]
 
-use std::{
-    sync::{Condvar, Mutex},
-    time::Duration,
-};
+use std::sync::{Condvar, Mutex};
 
 use futures::channel::oneshot;
 use wasmer_wasix::{

rust-toolchain.toml

@@ -0,0 +1,5 @@
+[toolchain]
+channel = "1.69"
+components = ["rustfmt", "rust-src", "clippy"]
+targets = ["wasm32-unknown-unknown"]
+profile = "minimal"