Re: [PATCH v2 15/21] gcov: remove CONFIG_GCOV_FORMAT_AUTODETECT

[Kees Cook]

On Mon, Mar 26, 2018 at 10:29 PM, Masahiro Yamada
<yamada.masahiro@xxxxxxxxxxxxx> wrote:
> CONFIG_GCOV_FORMAT_AUTODETECT compiles either gcc_3_4.c or gcc_4_7.c
> according to your GCC version.
>
> We can achieve the equivalent behavior by setting reasonable dependency
> with the knowledge of the compiler version.
>
> If GCC older than 4.7 is used, GCOV_FORMAT_3_4 is the default, but users
> are still allowed to select GCOV_FORMAT_4_7 in case the newer format is
> back-ported.
>
> On the other hand, If GCC 4.7 or newer is used, there is no reason to
> use GCOV_FORMAT_3_4, so it should be hidden.
>
> If you down-grade your compiler GCC 4.7 or older, oldconfig/syncconfig
> will display a prompt for the choice because GCOV_FORMAT_3_4 becomes
> visible as a new symbol.
>
> Signed-off-by: Masahiro Yamada <yamada.masahiro@xxxxxxxxxxxxx>

Reviewed-by: Kees Cook <keescook@xxxxxxxxxxxx>

-Kees

-- 
Kees Cook
Pixel Security