https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109821
--- Comment #2 from Xionghu Luo (luoxhu at gcc dot gnu.org) <yinyuefengyi at gmail dot com> --- (In reply to Andrew Pinski from comment #1) > Two issues which make this undefined. First the unaligned macros still use > aligned types which gcc uses for alignment of the pointer type. Thanks Andrew :), and the second issue is?