From 98901bbf2c6e26fe276fc8bd0ba241b2d56f9a5c Mon Sep 17 00:00:00 2001
From: ethan-000 <ethan_000@outlook.com>
Date: Sat, 11 Feb 2023 10:11:33 +0000
Subject: [PATCH] add comment to lto.rs

---
 src/cargo/core/compiler/lto.rs | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/cargo/core/compiler/lto.rs b/src/cargo/core/compiler/lto.rs
index 661d1d266e19..f50b16f895ee 100644
--- a/src/cargo/core/compiler/lto.rs
+++ b/src/cargo/core/compiler/lto.rs
@@ -5,6 +5,7 @@ use crate::util::interning::InternedString;
 use crate::util::errors::CargoResult;
 use std::collections::hash_map::{Entry, HashMap};
 
+/// LTO: Link Time Optimizations
 /// Possible ways to run rustc and request various parts of LTO.
 ///
 /// Variant            | Flag                   | Object Code | Bitcode
@@ -14,6 +15,8 @@ use std::collections::hash_map::{Entry, HashMap};
 /// `OnlyBitcode`      | `-C linker-plugin-lto` |             | ✓
 /// `ObjectAndBitcode` |                        | ✓           | ✓
 /// `OnlyObject`       | `-C embed-bitcode=no`  | ✓           |
+///
+/// See https://doc.rust-lang.org/nightly/cargo/reference/profiles.html#lto
 #[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
 pub enum Lto {
     /// LTO is run for this rustc, and it's `-Clto=foo`. If the given value is