http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46443
--- Comment #2 from Arthur Muller <muller at vki dot com> 2010-11-12 00:09:27 UTC --- (In reply to comment #1) > You are violating C/C++ aliasing rules; You are accessing a double as a long > which causes undefined behavior. memcpy does not cause this violation since > it > is defined to use the character type to do the copy. > > *** This bug has been marked as a duplicate of bug 21920 *** Thanks for the clarification! -Arthur