Rollup merge of #136626 - onur-ozkan:initial-rustdoc, r=jieyouxu

create `initial_rustdoc` field in `Build`

just a minor improvement

src/bootstrap/src/core/build_steps/tool.rs

@@ -582,7 +582,7 @@ fn run(self, builder: &Builder<'_>) -> PathBuf {
             if !target_compiler.is_snapshot(builder) {
                 panic!("rustdoc in stage 0 must be snapshot rustdoc");
             }
-            return builder.initial_rustc.with_file_name(exe("rustdoc", target_compiler.host));
+            return builder.initial_rustdoc.clone();
         }
         let target = target_compiler.host;
 

src/bootstrap/src/lib.rs

@@ -154,6 +154,7 @@ pub struct Build {
     targets: Vec<TargetSelection>,
 
     initial_rustc: PathBuf,
+    initial_rustdoc: PathBuf,
     initial_cargo: PathBuf,
     initial_lld: PathBuf,
     initial_relative_libdir: PathBuf,
@@ -354,6 +355,7 @@ pub fn new(mut config: Config) -> Build {
             initial_lld,
             initial_relative_libdir,
             initial_rustc: config.initial_rustc.clone(),
+            initial_rustdoc: config.initial_rustc.with_file_name(exe("rustdoc", config.build)),
             initial_cargo: config.initial_cargo.clone(),
             initial_sysroot: config.initial_sysroot.clone(),
             local_rebuild: config.local_rebuild,