From bb01f20e993bbd19b00e07ff0094b155aa0859de Mon Sep 17 00:00:00 2001
From: Brad King <brad.king@kitware.com>
Date: Thu, 3 Nov 2016 11:23:36 -0400
Subject: librhash: Disable warnings to avoid changing 3rd party code

Add '-w' or equivalent flag on compilers supporting it.
Tell MSVC to use its lowest warning level inside librhash sources.
---
 Utilities/cmlibrhash/CMakeLists.txt  | 8 ++++++++
 Utilities/cmlibrhash/librhash/ustd.h | 4 ++++
 2 files changed, 12 insertions(+)

(limited to 'Utilities/cmlibrhash')

diff --git a/Utilities/cmlibrhash/CMakeLists.txt b/Utilities/cmlibrhash/CMakeLists.txt
index 47d069ae0b..968a792fe2 100644
--- a/Utilities/cmlibrhash/CMakeLists.txt
+++ b/Utilities/cmlibrhash/CMakeLists.txt
@@ -1,5 +1,13 @@
 project(librhash C)
 
+# 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()
+
 set(librhash_sources
   librhash/algorithms.c
   librhash/algorithms.h
diff --git a/Utilities/cmlibrhash/librhash/ustd.h b/Utilities/cmlibrhash/librhash/ustd.h
index 38c4e3e20f..5bd9aacb49 100644
--- a/Utilities/cmlibrhash/librhash/ustd.h
+++ b/Utilities/cmlibrhash/librhash/ustd.h
@@ -5,6 +5,10 @@
 /* Include KWSys Large File Support configuration. */
 #include <cmsys/Configure.h>
 
+#if defined(_MSC_VER)
+# pragma warning(push,1)
+#endif
+
 #if _MSC_VER >= 1300
 
 # define int64_t __int64
-- 
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