On Tue, Aug 5, 2025 at 2:39 PM Tom Lane <tgl@sss.pgh.pa.us> wrote:
>
> Masahiko Sawada <sawada.mshk@gmail.com> writes:
> > On Tue, Aug 5, 2025 at 1:59 PM Tom Lane <tgl@sss.pgh.pa.us> wrote:
> >> Maybe there's some strange cross-distro difference here, but
> >> what I'm wondering is if there's a difference in CFLAGS.
> >> My build used
> >>
> >> CFLAGS = -Wall -Wmissing-prototypes -Wpointer-arith -Wdeclaration-after-statement -Werror=vla -Wendif-labels
-Wmissing-format-attribute-Wimplicit-fallthrough=3 -Wcast-function-type -Wshadow=compatible-local -Wformat-security
-Wmissing-variable-declarations-fno-strict-aliasing -fwrapv -fexcess-precision=standard -Wno-format-truncation
-Wno-stringop-truncation-g -O2
>
> > Yeah, interestingly I didn't see the warning with CFLAGS your build
> > used but got it if I use -O0 instead of -O2.
>
> I checked the buildfarm, and (so far) adder and flaviventris have
> shown this warning, but nothing else has. adder is using gcc 14.2.0
> with -O0, while flaviventris is using gcc 16.0.0 with -O0.
Indeed. Thank you for checking.
> Also
> I tried -O0 with gcc 15.1.1 on my Fedora 42 box, and now it shows the
> warning. So maybe the difference is just -O0? But I think there are
> other buildfarm animals using that, so I'm not certain we've explained
> the difference fully.
>
> Anyway, based on that I think there's enough reason to go ahead
> with your patch.
Agreed. I've attached the patch. I'll push it, barring comments.
Regards,
--
Masahiko Sawada
Amazon Web Services: https://aws.amazon.com
