I've recently been seeing this error more and more especially on GCC with -Wall: /home/dean/boost/boost/optional/optional.hpp:407: warning: dereferencing pointer ‘<anonymous>’ does break strict-aliasing rules /home/dean/boost/boost/optional/optional.hpp:427: note: initialized from here and: /home/dean/boost/boost/function/function_base.hpp:321: warning: dereferencing type-punned pointer will break strict-aliasing rules /home/dean/boost/boost/function/function_base.hpp:325: warning: dereferencing type-punned pointer will break strict-aliasing rules This is on Linux and GCC 4.4.1. I'm not an expert in this regard but is there a way to either silence or avoid these warnings? Anything you want me to try from my end? Thanks in advance and I hope this helps. -- Dean Michael Berris blog.cplusplus-soup.com | twitter.com/mikhailberis linkedin.com/in/mikhailberis | facebook.com/dean.berris | deanberris.com