https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70066
--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> --- > The BIGGEST_FIELD_ALIGNMENT macro is defined in config/i386/i386.h with the > following comment: ... > #ifdef IN_TARGET_LIBS This definition version is only ever used in libobjc and libgcc.