--- CMakeLists.txt.orig	2018-01-05 12:08:27 UTC
+++ CMakeLists.txt
@@ -3,6 +3,10 @@ set(OCIO_VERSION_MAJOR 1)
 set(OCIO_VERSION_MINOR 1)
 set(OCIO_VERSION_PATCH 0)
 
+set(CMAKE_CXX_STANDARD 11)
+set(CMAKE_CXX_STANDARD_REQUIRED ON)
+set(CMAKE_CXX_EXTENSIONS OFF)
+
 cmake_minimum_required(VERSION 2.8)
 set(CMAKE_MODULE_PATH ${CMAKE_SOURCE_DIR}/share/cmake)
 if(NOT DEFINED CMAKE_FIRST_RUN)
@@ -218,8 +222,7 @@ else(USE_EXTERNAL_TINYXML)
         ## => great news when build staticaly since we do not want another client project have to link also with tinyxml when he want to use this project
         ## => could be problematic if the client project use another version of tinyxml... In this case build tinyxml as shared lib with all projects could be a solution
         ## => TODO: so maybe provide a simple cmake way to build 3rdParty as shared and auto install with this project ?
-        set_target_properties(TINYXML_LIB PROPERTIES COMPILE_FLAGS "-DTIXML_USE_STL -fPIC -fvisibility-inlines-hidden -fvisibility=hidden")
-        add_definitions(-DTIXML_USE_STL) ## needed to build correctly, and also need to be propagated in child projects (client projects)
+        set_target_properties(TINYXML_LIB PROPERTIES COMPILE_FLAGS "-fPIC -fvisibility-inlines-hidden -fvisibility=hidden")
         list(APPEND EXTERNAL_OBJECTS $<TARGET_OBJECTS:TINYXML_LIB>)
     else()
         find_package(Git REQUIRED) ## in order to apply patch (for crossplateform compatibility)
@@ -384,7 +387,7 @@ else()
     set(OCIO_INLINES_HIDDEN OFF)
 endif()
 
-set(EXTERNAL_COMPILE_FLAGS "-DTIXML_USE_STL ${YAML_CPP_COMPILE_FLAGS} ${GCC_COMPILE_FLAGS}")
+set(EXTERNAL_COMPILE_FLAGS "${YAML_CPP_COMPILE_FLAGS} ${GCC_COMPILE_FLAGS}")
 
 set(EXTERNAL_LINK_FLAGS "")
 set(EXTERNAL_LIBRARY_DIRS ${PROJECT_BINARY_DIR}/ext/dist/lib)