Temp revert cmake for OS X

test/unittest/CMakeLists.txt

@@ -40,9 +40,9 @@ elseif (CMAKE_CXX_COMPILER_ID MATCHES "Clang")
     set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Werror -Wall -Wextra -Weffc++ -Wswitch-default -Wfloat-equal -Wimplicit-fallthrough -Weverything")
 	# If the user is running a newer version of Clang that includes the
 	# -Wdouble-promotion, we will ignore that warning.
-	if (CMAKE_CXX_COMPILER_VERSION VERSION_GREATER 3.7)
-	     set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wno-double-promotion")
-	endif()
+	# if (CMAKE_CXX_COMPILER_VERSION VERSION_GREATER 3.7)
+	#     set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wno-double-promotion")
+	# endif()
 elseif ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "MSVC")
     # Force to always compile with /W4
     if(CMAKE_CXX_FLAGS MATCHES "/W[0-4]")