From cd9bea3317114f13db945aac802b8de238ded934 Mon Sep 17 00:00:00 2001
From: lzutao <taolzu@gmail.com>
Date: Sun, 7 Apr 2019 11:48:14 +0700
Subject: [PATCH] Add reference to cfg attr

---
 src/libstd/macros.rs | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/libstd/macros.rs b/src/libstd/macros.rs
index be4db1f737d83..7228886fe55a6 100644
--- a/src/libstd/macros.rs
+++ b/src/libstd/macros.rs
@@ -836,9 +836,11 @@ mod builtin {
     /// boolean expression evaluation of configuration flags. This frequently
     /// leads to less duplicated code.
     ///
-    /// The syntax given to this macro is the same syntax as the `cfg`
+    /// The syntax given to this macro is the same syntax as the [`cfg`]
     /// attribute.
     ///
+    /// [`cfg`]: ../reference/conditional-compilation.html#the-cfg-attribute
+    ///
     /// # Examples
     ///
     /// ```