From e5e407beb4f5f097ede7f3cc9af706128a197f7e Mon Sep 17 00:00:00 2001
From: Rui Ueyama <ruiu@google.com>
Date: Tue, 29 Nov 2016 04:17:30 +0000
Subject: [PATCH] Add comments.

llvm-svn: 288111
---
 lld/COFF/DriverUtils.cpp | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/lld/COFF/DriverUtils.cpp b/lld/COFF/DriverUtils.cpp
index c548bbac930b..6c0486ef2cd9 100644
--- a/lld/COFF/DriverUtils.cpp
+++ b/lld/COFF/DriverUtils.cpp
@@ -666,8 +666,11 @@ llvm::opt::InputArgList ArgParser::parse(ArrayRef<const char *> ArgsArr) {
   return Args;
 }
 
+// link.exe has an interesting feature. If LINK environment exists,
+// its contents are handled as a command line string. So you can pass
+// extra arguments using the environment variable.
 llvm::opt::InputArgList ArgParser::parseLINK(ArrayRef<const char *> Args) {
-  // Concatenate LINK env and given arguments and parse them.
+  // Concatenate LINK env and command line arguments, and then parse them.
   Optional<std::string> Env = Process::GetEnv("LINK");
   if (!Env)
     return parse(Args);