Resolve unexpected_cfgs warning when build script is not run

dtolnay · Oct 18, 2024 · 6fe6435 · 6fe6435
1 parent fba7a15
commit 6fe6435
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diff --git a/build.rs b/build.rs
@@ -2,5 +2,7 @@ fn main() {
     // Warning: build.rs is not published to crates.io.
 
     println!("cargo:rerun-if-changed=src/tests");
+    println!("cargo:rustc-cfg=check_cfg");
+    println!("cargo:rustc-check-cfg=cfg(check_cfg)");
     println!("cargo:rustc-check-cfg=cfg(trybuild_no_target)");
 }
diff --git a/src/lib.rs b/src/lib.rs
@@ -228,6 +228,7 @@
 //! ```
 
 #![doc(html_root_url = "https://docs.rs/trybuild/1.0.100")]
+#![cfg_attr(not(check_cfg), allow(unexpected_cfgs))]
 #![allow(
     clippy::collapsible_if,
     clippy::comparison_chain,