From 58216d16946b7a14570f1a1dd4d260ed146b3faa Mon Sep 17 00:00:00 2001
From: Brad King <brad.king@kitware.com>
Date: Thu, 5 May 2016 15:15:02 -0400
Subject: [PATCH] expat: Suppress compiler warnings

We are not developing expat so we do not care about warnings.
---
 Utilities/cmexpat/CMakeLists.txt  | 8 ++++++++
 Utilities/cmexpat/lib/winconfig.h | 5 +++++
 2 files changed, 13 insertions(+)

diff --git a/Utilities/cmexpat/CMakeLists.txt b/Utilities/cmexpat/CMakeLists.txt
index 378182198..d29416547 100644
--- a/Utilities/cmexpat/CMakeLists.txt
+++ b/Utilities/cmexpat/CMakeLists.txt
@@ -1,3 +1,11 @@
+# Disable warnings to avoid changing 3rd party code.
+IF(CMAKE_C_COMPILER_ID MATCHES
+    "^(GNU|Clang|AppleClang|XL|VisualAge|SunPro|MIPSpro|HP|Intel)$")
+  SET(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -w")
+ELSEIF(CMAKE_C_COMPILER_ID STREQUAL "PathScale")
+  SET(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -woffall")
+ENDIF()
+
 include(ConfigureChecks.cmake)
 if(WIN32)
   add_definitions(-DCOMPILING_FOR_WINDOWS)
diff --git a/Utilities/cmexpat/lib/winconfig.h b/Utilities/cmexpat/lib/winconfig.h
index 908d71480..d7dad38f7 100644
--- a/Utilities/cmexpat/lib/winconfig.h
+++ b/Utilities/cmexpat/lib/winconfig.h
@@ -19,4 +19,9 @@
 
 #include "expat_config.h"
 
+#if defined(_MSC_VER)
+# pragma warning(push,1)
+# pragma warning(disable:4311)   /* pointer truncation */
+#endif
+
 #endif /* ndef WINCONFIG_H */