codex/patches/rules_rs_windows_gnullvm_link_flags.patch

# What: preserve the Windows system-library link flags that the stable wrapper
# was dropping for gnullvm Rust toolchains.
# Scope: Windows-gnullvm-only linker metadata for generated `rules_rs`
# toolchains; the selected hermetic C++ toolchain remains the linker driver.

diff --git a/rs/experimental/toolchains/declare_rustc_toolchains.bzl b/rs/experimental/toolchains/declare_rustc_toolchains.bzl
--- a/rs/experimental/toolchains/declare_rustc_toolchains.bzl
+++ b/rs/experimental/toolchains/declare_rustc_toolchains.bzl
@@ -104,7 +104,13 @@ def declare_rustc_toolchains(
                 "@platforms//os:nixos": ["-ldl", "-lpthread"],
                 "@platforms//os:openbsd": ["-lpthread"],
                 "@platforms//os:ios": ["-lSystem", "-lobjc", "-Wl,-framework,Security", "-Wl,-framework,Foundation", "-lresolv"],
-                # TODO: windows
+                "@rules_rs//rs/experimental/platforms/constraints:windows_gnullvm": [
+                    "-ladvapi32",
+                    "-lws2_32",
+                    "-luserenv",
+                    "-lbcrypt",
+                ],
+                # TODO: other platforms
                 "//conditions:default": [],
             }),
             default_edition = edition,