Re: [PATCH] configure: Disable -Wtautological-type-limit-compare

["Alex Bennée" <alex.bennee@linaro.org>]

Richard Henderson <richard.henderson@linaro.org> writes:

> Clang 10 enables this by default with -Wtype-limit.
>
> All of the instances flagged by this Werror so far have been
> cases in which we really do want the compiler to optimize away
> the test completely.  Disabling the warning will avoid having
> to add ifdefs to work around this.
>
> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
> ---
>  configure | 2 ++
>  1 file changed, 2 insertions(+)
>
> diff --git a/configure b/configure
> index f087d2bcd1..693f01327f 100755
> --- a/configure
> +++ b/configure
> @@ -2009,6 +2009,8 @@ gcc_flags="-Wno-missing-include-dirs -Wempty-body -Wnested-externs $gcc_flags"
>  gcc_flags="-Wendif-labels -Wno-shift-negative-value $gcc_flags"
>  gcc_flags="-Wno-initializer-overrides -Wexpansion-to-defined $gcc_flags"
>  gcc_flags="-Wno-string-plus-int -Wno-typedef-redefinition $gcc_flags"
> +gcc_flags="$gcc_flags -Wno-tautological-type-limit-compare"
> +

nit: the pattern is reversed compared to the previous lines (foo $gcc_flags)

I had exactly the same patch in my local tree but it wasn't enough for
clang-9 which I was using for a sanitiser build. I ended up
having to apply --disable-werrror to the configuration.

Anyway:

Reviewed-by: Alex Bennée <alex.bennee@linaro.org>

-- 
Alex Bennée