Sam James <s...@gentoo.org> 于2024年3月17日周日 14:04写道： > > YunQiang Su <s...@gcc.gnu.org> writes: > > > Arm32 predefines __ARM_FEATURE_UNALIGNED if -mno-unaligned-access, > > and RISC-V predefines __riscv_misaligned_avoid, while other ports > > that support -mstrict-align/-mno-unaligned-access don't have such > > macro, and these backend macros are only avaiable for c-family. > > Note: Arm64 always predefine __ARM_FEATURE_UNALIGNED: See #111555. > > I would say tag the bug even if you're not fixing it, as it was related > enough for you to cite it. >
I am not sure that it is a bug for aarch64. This macro may be used to determine whether hardware can support misaligned access, and maybe all of Aarch64 CPUs can support it. It should be determined by ARM people.
