Allow undexpected cfgs for bootstrap.

smmalis37 · smmalis37 · commit 81841dcff16d · 2023-12-18T16:48:47.000Z
diff --git a/library/std/src/sys/windows/os.rs b/library/std/src/sys/windows/os.rs
@@ -1,5 +1,6 @@
 //! Implementation of `std::os` functionality for Windows.
 
+#![cfg_attr(bootstrap, allow(unexpected_cfgs))]
 #![allow(nonstandard_style)]
 
 #[cfg(test)]
