Which version should i download for libxml2 for linux?

I want to use libxml2 library but confused with which version should i download for programming in linux,I would be programming in QTCreator so after download,I would link external library and choose the Libxml2.so file path and folder with include file apart from this. Do i also need to install it ? If yes, please tell installation steps..I am a beginner with linux ..Please provide appropriate link for libxml2 downloadI want to use libxml2 library but confused with