Auto merge of #94369 - matthiaskrgr:rollup-qtripm2, r=matthiaskrgr

Rollup of 4 pull requests

Successful merges:

 - #93850 (Don't ICE when an extern static is too big for the current architecture)
 - #94154 (Wire up unstable rustc --check-cfg to rustdoc)
 - #94353 (Fix debug_assert in unused lint pass)
 - #94366 (Add missing item to release notes)

Failed merges:

r? `@ghost`
`@rustbot` modify labels: rollup

src/librustdoc/doctest.rs

@@ -91,7 +91,7 @@ crate fn run(options: RustdocOptions) -> Result<(), ErrorReported> {
     let config = interface::Config {
         opts: sessopts,
         crate_cfg: interface::parse_cfgspecs(cfgs),
-        crate_check_cfg: interface::parse_check_cfg(vec![]),
+        crate_check_cfg: interface::parse_check_cfg(options.check_cfgs.clone()),
         input,
         input_path: None,
         output_file: None,
@@ -321,6 +321,12 @@ fn run_test(
     for cfg in &rustdoc_options.cfgs {
         compiler.arg("--cfg").arg(&cfg);
     }
+    if !rustdoc_options.check_cfgs.is_empty() {
+        compiler.arg("-Z").arg("unstable-options");
+        for check_cfg in &rustdoc_options.check_cfgs {
+            compiler.arg("--check-cfg").arg(&check_cfg);
+        }
+    }
     if let Some(sysroot) = rustdoc_options.maybe_sysroot {
         compiler.arg("--sysroot").arg(sysroot);
     }