Re: Erroneous -Werror=missing-braces on old GCC

On Mon, 25 Dec 2023 at 10:42, Richard Guo <guofenglinux(at)gmail(dot)com> wrote:
> I came across the 'missing braces' warning again when building master
> (0a93f803f4) on old GCC (4.8.5).
>
> blkreftable.c: In function ‘BlockRefTableSetLimitBlock’:
> blkreftable.c:268:2: warning: missing braces around initializer
> [-Wmissing-braces]
> BlockRefTableKey key = {0}; /* make sure any padding is zero */
> ^
>

I doubt if `key = {0}` equals `key = {{0}}`, since the second only
initialize the first field in `key`, it may depend on compiler to
initialize other fields (include padding).

> This has popped up a few times in the past, and it seems to be GCC bug
> 53119. We previously used the {{...}} approach to suppress it. Should
> we do the same here, like attached?
>
> FWIW, in the same file we initialize BlockRefTableSerializedEntry
> variables also with {{0}}.
>
> Thanks
> Richard

--
Regrads,
Japin Li
ChengDu WenWu Information Technology Co., Ltd.