From d6336dfe01744209b1aa0987c0a7a6c1d79a8ff4 Mon Sep 17 00:00:00 2001
From: Eric Huss <eric@huss.org>
Date: Wed, 29 Apr 2020 08:16:39 -0700
Subject: [PATCH] Add an index page for nightly rustc docs.

---
 src/bootstrap/doc.rs | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/bootstrap/doc.rs b/src/bootstrap/doc.rs
index fc217a707db..7eab92ddc92 100644
--- a/src/bootstrap/doc.rs
+++ b/src/bootstrap/doc.rs
@@ -478,7 +478,11 @@ impl Step for Rustc {
 
         // Build cargo command.
         let mut cargo = builder.cargo(compiler, Mode::Rustc, target, "doc");
-        cargo.env("RUSTDOCFLAGS", "--document-private-items");
+        cargo.env(
+            "RUSTDOCFLAGS",
+            "--document-private-items \
+            --enable-index-page -Zunstable-options",
+        );
         compile::rustc_cargo(builder, &mut cargo, target);
 
         // Only include compiler crates, no dependencies of those, such as `libc`.