id summary reporter owner description type status milestone component version severity resolution keywords cc 13211 BOOST_MAY_ALIAS is not always defined and is not documented viboes John Maddock "The issue comes from the fact that BOOST_MAY_ALIAS is not always defined. E.g. {{{ // Type aliasing hint. #if __has_attribute(__may_alias__) # define BOOST_MAY_ALIAS __attribute__((__may_alias__)) #endif }}} Wondering if this shouldn't be {{{ // Type aliasing hint. #if __has_attribute(__may_alias__) # define BOOST_MAY_ALIAS __attribute__((__may_alias__)) #else # define BOOST_MAY_ALIAS #endif }}} " Bugs closed To Be Determined config Boost 1.65.0 Problem invalid