Merge pull request #612 from miloyip/cmake_CMP0054

Try to fix cmake CMP0054 warning

CHANGELOG.md

@@ -55,6 +55,7 @@ This project adheres to [Semantic Versioning](http://semver.org/).
 * Fix a bug in schema minimum/maximum keywords for 64-bit integer (e7149d665941068ccf8c565e77495521331cf390)
 * Fix a crash bug in regex (#605)
 * Fix schema "required" keyword cannot handle duplicated keys (#609)
+* Fix cmake CMP0054 warning (#612)
 
 ### Changed
 * Clarify problematic JSON license (#392)

CMakeLists.txt

 CMAKE_MINIMUM_REQUIRED(VERSION 2.8)
+if(POLICY CMP0054)
+  cmake_policy(SET CMP0054 NEW)
+endif()
+
 SET(CMAKE_MODULE_PATH ${CMAKE_CURRENT_SOURCE_DIR}/CMakeModules)
 
 PROJECT(RapidJSON CXX)

example/CMakeLists.txt

 cmake_minimum_required(VERSION 2.8)
 
+if(POLICY CMP0054)
+  cmake_policy(SET CMP0054 NEW)
+endif()
+
 set(EXAMPLES
     capitalize
     condense