From 2264e8c66f9bb02407824f3cdf660efee13fdafb Mon Sep 17 00:00:00 2001
From: Axel Naumann <Axel.Naumann@cern.ch>
Date: Wed, 6 Dec 2017 04:11:26 +0100
Subject: [PATCH] Mark compiler include paths as -cxx-isystem (ROOT-8991).

---
 lib/Interpreter/CIFactory.cpp | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/lib/Interpreter/CIFactory.cpp b/lib/Interpreter/CIFactory.cpp
index b8a351f7..54ae72ef 100644
--- a/lib/Interpreter/CIFactory.cpp
+++ b/lib/Interpreter/CIFactory.cpp
@@ -125,7 +125,7 @@ namespace {
               cling::utils::LogNonExistantDirectory(Path);
           }
           else
-            Args.addArgument("-I", Path.str());
+            Args.addArgument("-cxx-isystem", Path.str());
         }
       }
       ::pclose(PF);
@@ -164,7 +164,7 @@ namespace {
     }
 
     for (llvm::StringRef Path : Paths)
-      Args.addArgument("-I", Path.str());
+      Args.addArgument("-cxx-isystem", Path.str());
 
     return true;
   }