https://gcc.gnu.org/bugzilla/show_bug.cgi?id=122202
--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> --- Also target_version attribute is not documented either. Yes for aarch64 it is documented as part of ACLE but it would be useful if documented in the GCC manual and maybe point to ACLE for aarch64 documentation on it.
