From be592b23bd737c5c3ea9c111a139d2dd81a622b9 Mon Sep 17 00:00:00 2001
From: Brad King <brad.king@kitware.com>
Date: Fri, 17 Nov 2017 09:55:46 -0500
Subject: IWYU: Suppress warnings from the internal Clang

Do not obscure IWYU's report with warnings from its internal Clang.
We have other testing for such warnings.  Also, when compiling with
a non-Clang compiler we might use warning options that IWYU's Clang
does not understand, and we don't want to see warnings about that.
---
 CMakeLists.txt | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'CMakeLists.txt')

diff --git a/CMakeLists.txt b/CMakeLists.txt
index f14f62f6b4..bf0c4d1275 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -267,7 +267,7 @@ if(CMake_RUN_IWYU)
     message(FATAL_ERROR "CMake_RUN_IWYU is ON but include-what-you-use is not found!")
   endif()
   set(CMAKE_CXX_INCLUDE_WHAT_YOU_USE
-    "${IWYU_COMMAND};-Xiwyu;--mapping_file=${CMake_SOURCE_DIR}/Utilities/IWYU/mapping.imp")
+    "${IWYU_COMMAND};-Xiwyu;--mapping_file=${CMake_SOURCE_DIR}/Utilities/IWYU/mapping.imp;-w")
 endif()
 
 
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