From b2c0887457ef509c1a93bcddf9ad8f5e87d9945e Mon Sep 17 00:00:00 2001
From: Chad Rosier <mcrosier@apple.com>
Date: Wed, 12 Dec 2012 20:06:31 +0000
Subject: [PATCH] [driver] Don't warn about an unused -flto option.
 rdar://12851905

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@170010 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/Driver/Tools.cpp | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/lib/Driver/Tools.cpp b/lib/Driver/Tools.cpp
index 25aab58660..ee86da6c34 100644
--- a/lib/Driver/Tools.cpp
+++ b/lib/Driver/Tools.cpp
@@ -2281,6 +2281,10 @@ void Clang::ConstructJob(Compilation &C, const JobAction &JA,
       A->render(Args, CmdArgs);
   }
 
+  // Don't warn about unused -flto.  This can happen when we're preprocessing or
+  // precompiling.
+  Args.ClaimAllArgs(options::OPT_flto);
+
   Args.AddAllArgs(CmdArgs, options::OPT_W_Group);
   if (Args.hasFlag(options::OPT_pedantic, options::OPT_no_pedantic, false))
     CmdArgs.push_back("-pedantic");
-- 
2.50.1