From d646836cddf54624fa14ce7ace4b1b050b3f2a23 Mon Sep 17 00:00:00 2001
From: Scott Howard <showard314@gmail.com>
Date: Wed, 1 Apr 2015 21:44:41 -0400
Subject: [PATCH] turn on -Wno-potentially-evaluated-expression on clang

---
 CMakeLists.txt | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 342fb7e39..07fffd577 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -353,6 +353,14 @@ endif()
 if (CMAKE_CXX_COMPILER_ID STREQUAL GNU OR CMAKE_CXX_COMPILER_ID STREQUAL Clang)
     set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wall -Wextra -Wno-unused-parameter -Wno-reorder -std=c++98 -pedantic -Wno-long-long")
 
+    if (CMAKE_CXX_COMPILER_ID STREQUAL Clang AND NOT APPLE)
+        execute_process(COMMAND ${CMAKE_C_COMPILER} --version OUTPUT_VARIABLE CLANG_VERSION)
+        string(REGEX REPLACE ".*version ([0-9\\.]*).*" "\\1" CLANG_VERSION ${CLANG_VERSION})
+        if ("${CLANG_VERSION}" VERSION_GREATER 3.6 OR "${CLANG_VERSION}" VERSION_EQUAL 3.6)
+            set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wno-potentially-evaluated-expression")
+        endif ("${CLANG_VERSION}" VERSION_GREATER 3.6 OR "${CLANG_VERSION}" VERSION_EQUAL 3.6)
+    endif(CMAKE_CXX_COMPILER_ID STREQUAL Clang AND NOT APPLE)
+
     execute_process(COMMAND ${CMAKE_C_COMPILER} -dumpversion
                 OUTPUT_VARIABLE GCC_VERSION)
     if (CMAKE_CXX_COMPILER_ID STREQUAL GNU AND "${GCC_VERSION}" VERSION_GREATER 4.6 OR "${GCC_VERSION}" VERSION_EQUAL 4.6)