https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89701
--- Comment #2 from Hongtao.liu <crazylht at gmail dot com> ---
(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.
