https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81870
Andrew Pinski <pinskia at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|UNCONFIRMED |RESOLVED Resolution|--- |INVALID --- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> --- No the code is still undefined as the type which you are using has an alignment requirement. Use a different type like say: typedef int unaligned_int32_t __attribute__((aligned(1)));