Hi, In boost 1.35.0 I'm getting many of the following warnings from gcc-4.2.0 under cygwin when using boost/functional/hash: ../boost_libraries/boost/functional/detail/hash_float.hpp: In function 'size_t boost::hash_detail::float_hash_impl(float)': ../boost_libraries/boost/functional/detail/hash_float.hpp:75: warning: dereferencing type-punned pointer will break strict-aliasing rules ../boost_libraries/boost/functional/detail/hash_float.hpp: In function 'size_t boost::hash_detail::float_hash_impl(double)': ../boost_libraries/boost/functional/detail/hash_float.hpp:82: warning: dereferencing type-punned pointer will break strict-aliasing rules ../boost_libraries/boost/functional/detail/hash_float.hpp: In function 'size_t boost::hash_detail::float_hash_impl(long double)': ../boost_libraries/boost/functional/detail/hash_float.hpp:90: warning: dereferencing type-punned pointer will break strict-aliasing rules Is this a boost bug, or a spurious warning? Is there a fix or a sound workaround? Thanks, Mat