diff --git a/code/CMakeModules/PCHSupport.cmake b/code/CMakeModules/PCHSupport.cmake
index 50853c964..45e1aa766 100644
--- a/code/CMakeModules/PCHSupport.cmake
+++ b/code/CMakeModules/PCHSupport.cmake
@@ -27,6 +27,19 @@ ELSE()
   ENDIF()
 ENDIF()
 
+MACRO(APPEND_DEFINITION _NAME _VAL)
+  # value is not empty
+  IF(${_VAL})
+    IF(CMAKE_VERSION VERSION_LESS "2.8.12")
+      # don't support logical expressions, append definition
+      LIST(APPEND ${_NAME} "-D${_VAL}")
+    ELSE()
+      # support logical expressions, use them
+      LIST(APPEND ${_NAME} "$<$<BOOL:${_VAL}>:-D$<JOIN:${_VAL},-D>>")
+    ENDIF()
+  ENDIF()
+ENDMACRO()
+
 # Set PCH_FLAGS for common flags, PCH_ARCH_XXX_FLAGS for specific archs flags and PCH_ARCHS for archs
 MACRO(PCH_SET_COMPILE_FLAGS _target)
   SET(PCH_FLAGS)
@@ -77,28 +90,28 @@ MACRO(PCH_SET_COMPILE_FLAGS _target)
   GET_DIRECTORY_PROPERTY(DEFINITIONS COMPILE_DEFINITIONS)
   IF(DEFINITIONS)
     FOREACH(item ${DEFINITIONS})
-      LIST(APPEND GLOBAL_DEFINITIONS "$<$<BOOL:${item}>:-D$<JOIN:${item},-D>>")
+      APPEND_DEFINITION(GLOBAL_DEFINITIONS ${item})
     ENDFOREACH()
   ENDIF()
 
   GET_DIRECTORY_PROPERTY(DEFINITIONS COMPILE_DEFINITIONS_${_UPPER_BUILD})
   IF(DEFINITIONS)
     FOREACH(item ${DEFINITIONS})
-      LIST(APPEND GLOBAL_DEFINITIONS "$<$<BOOL:${item}>:-D$<JOIN:${item},-D>>")
+      APPEND_DEFINITION(GLOBAL_DEFINITIONS ${item})
     ENDFOREACH()
   ENDIF()
 
   GET_DIRECTORY_PROPERTY(DEFINITIONS DIRECTORY ${CMAKE_SOURCE_DIR} COMPILE_DEFINITIONS)
   IF(DEFINITIONS)
     FOREACH(item ${DEFINITIONS})
-      LIST(APPEND GLOBAL_DEFINITIONS "$<$<BOOL:${item}>:-D$<JOIN:${item},-D>>")
+      APPEND_DEFINITION(GLOBAL_DEFINITIONS ${item})
     ENDFOREACH()
   ENDIF()
 
   GET_DIRECTORY_PROPERTY(DEFINITIONS DIRECTORY ${CMAKE_SOURCE_DIR} COMPILE_DEFINITIONS_${_UPPER_BUILD})
   IF(DEFINITIONS)
     FOREACH(item ${DEFINITIONS})
-      LIST(APPEND GLOBAL_DEFINITIONS "$<$<BOOL:${item}>:-D$<JOIN:${item},-D>>")
+      APPEND_DEFINITION(GLOBAL_DEFINITIONS ${item})
     ENDFOREACH()
   ENDIF()
 
@@ -122,14 +135,14 @@ MACRO(PCH_SET_COMPILE_FLAGS _target)
   GET_TARGET_PROPERTY(DEFINITIONS ${_target} COMPILE_DEFINITIONS)
   IF(DEFINITIONS)
     FOREACH(item ${DEFINITIONS})
-      LIST(APPEND GLOBAL_DEFINITIONS "$<$<BOOL:${item}>:-D$<JOIN:${item},-D>>")
+      APPEND_DEFINITION(GLOBAL_DEFINITIONS ${item})
     ENDFOREACH()
   ENDIF()
 
   GET_TARGET_PROPERTY(DEFINITIONS ${_target} COMPILE_DEFINITIONS_${_UPPER_BUILD})
   IF(DEFINITIONS)
     FOREACH(item ${DEFINITIONS})
-      LIST(APPEND GLOBAL_DEFINITIONS "$<$<BOOL:${item}>:-D$<JOIN:${item},-D>>")
+      APPEND_DEFINITION(GLOBAL_DEFINITIONS ${item})
     ENDFOREACH()
   ENDIF()
 
@@ -151,7 +164,7 @@ MACRO(PCH_SET_COMPILE_FLAGS _target)
 
         IF(_DEFINITIONS)
           FOREACH(item ${_DEFINITIONS})
-            LIST(APPEND GLOBAL_DEFINITIONS "$<$<BOOL:${item}>:-D$<JOIN:${item},-D>>")
+            APPEND_DEFINITION(GLOBAL_DEFINITIONS ${item})
           ENDFOREACH()
         ENDIF()
       ENDIF()
diff --git a/code/nel/include/nel/misc/i_xml.h b/code/nel/include/nel/misc/i_xml.h
index b078eb7ee..50fdddd04 100644
--- a/code/nel/include/nel/misc/i_xml.h
+++ b/code/nel/include/nel/misc/i_xml.h
@@ -171,6 +171,11 @@ public:
 	  */
 	static bool		getContentString (std::string &result, xmlNodePtr node);
 
+	/**
+	  * Release meory used by libxml2, to only call before exit.
+	  */
+	static void		releaseLibXml();
+
 private:
 
 	/// From IStream
diff --git a/code/nel/src/misc/i_xml.cpp b/code/nel/src/misc/i_xml.cpp
index 3c8a3c6ba..719d5f359 100644
--- a/code/nel/src/misc/i_xml.cpp
+++ b/code/nel/src/misc/i_xml.cpp
@@ -103,13 +103,11 @@ void CIXml::release ()
 		// Free it
 		xmlClearParserCtxt (_Parser);
 		xmlFreeParserCtxt (_Parser);
-		// commented due to the bug #857 xmlCleanupParser ();
 
 		_Parser = NULL;
 	}
 
 	// Not initialized
-	_Parser = NULL;
 	_CurrentElement = NULL;
 	_CurrentNode = NULL;
 	_PushBegin = false;
@@ -1143,6 +1141,11 @@ bool CIXml::getContentString (std::string &result, xmlNodePtr node)
 
 // ***************************************************************************
 
+void CIXml::releaseLibXml()
+{
+	xmlCleanupParser();
+}
+
 } // NLMISC
 
 #endif // NL_DONT_USE_EXTERNAL_CODE
diff --git a/code/nel/tools/3d/plugin_max/nel_export/nel_export_swt.cpp b/code/nel/tools/3d/plugin_max/nel_export/nel_export_swt.cpp
index 997b935a9..c466b7055 100644
--- a/code/nel/tools/3d/plugin_max/nel_export/nel_export_swt.cpp
+++ b/code/nel/tools/3d/plugin_max/nel_export/nel_export_swt.cpp
@@ -70,7 +70,7 @@ bool CNelExport::exportSWT(const std::string &sPath, std::vector<INode*>& vectNo
 		}
 	}
 
-	if (aSWNodes.size())
+	if (!aSWNodes.empty())
 	{
 		CSkeletonWeight sw;
 		COFile file;
diff --git a/code/ryzom/client/src/release.cpp b/code/ryzom/client/src/release.cpp
index 6e90d2d3d..0c6514418 100644
--- a/code/ryzom/client/src/release.cpp
+++ b/code/ryzom/client/src/release.cpp
@@ -664,6 +664,7 @@ void release()
 	NLGUI::CDBManager::release();
 	CWidgetManager::release();
 	CViewRenderer::release();
+	CIXml::releaseLibXml();
 
 #if FINAL_VERSION
 	// openURL ("http://ryzom.com/exit/");