https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89701
--- Comment #3 from Hongtao.liu <crazylht at gmail dot com> ---
(In reply to Hongtao.liu from comment #2)
> (In reply to Marek Polacek from comment #1)
> > Confirmed. While we support -fcf-protection=branch and
> > -fcf-protection=return,
> > -fcf-protection=branch,return gives an error:
> >
> > xgcc: error: unknown Control-Flow Protection Level ‘branch,return’
> > xgcc: note: valid arguments to ‘-fcf-protection=’ are: branch check full
> > none retur
>
> We can add a new EnumValue with string (branch,return) and value ({(enum
> cf_protection_level) (CF_BRANCH | CF_RETURN)}) for this specific case, but
> the implementation is too cumbersome considering the many permutations
> possible.
>
> Another way is adding parser_cf_protection_options, called in
> parse_sanitizer_options, decoding the string value and set corresponding bit
> in flag_cf_protection.
called in common_handle_option
