[Bug build/29979] Some -Wmaybe-uninitialized are needed on x86_32 without -Os

["m.novosyolov at rosalinux dot ru" <sourceware-bugzilla@sourceware.org>]

https://sourceware.org/bugzilla/show_bug.cgi?id=29979

--- Comment #2 from Mikhail Novosyolov <m.novosyolov at rosalinux dot ru> ---
(In reply to Adhemerval Zanella from comment #1)
> Right, which gcc version did you use it? I am checking with GCC 11 and I
> have not see any issue so far.

It is gcc 11:

$ gcc --version
gcc (GCC) 11.2.0 20210728 (ROSA)

I have provided full gcc cmdline with flags above, do not have any ideas else
where the difference can be...

If it will help, here is a chroot in which this problem can be reproduced:

https://mirror.rosalinux.ru/rosa/rosa2021.1/iso/ROSA.FRESH.12/rootfs/rootfs-std-rosa2021.1_x86_64_2022-11-02.tar.xz

Or an installable livecd:
https://mirror.rosalinux.ru/rosa/rosa2021.1/iso/ROSA.FRESH.12/server/

To reproduce the problem, run:

sudo mkdir chroot
cd chroot
sudo tar -xf /path/to/rootfs-std-rosa2021.1_x86_64_2022-11-02.tar.xz
sudo systemd-nspawn -D . (or sudo chroot .)
# if running in VM, not chroot/container, start from here
dnf install basesystem-build /usr/bin/mbd git-core abf
git clone https://abf.io/import/glibc.git -b rosa2023.1
cd glibc
mbd glibc.spec
dnf install *.rpm (install build dependencies of glibc)

Comment out the patch described above:
-Patch10:       glibc-fix-ix86-build.patch
+#Patch10:      glibc-fix-ix86-build.patch

Run the build:
abf rpmbuild (just press enter when it asks questions about config)

gcc sources are here:
https://abf.io/import/gcc/tree/rosa2021.1

glibc with that problem:
https://abf.io/import/glibc/tree/rosa2023.1

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