[DPDK/core Bug 2099] [dpdk26.11-rc2] /drivers/net/xsc meson build failed with EXTRA_CFLAGS='-O1' on Ubuntu26.04

[bugzilla@dpdk.org]

https://bugs.dpdk.org/show_bug.cgi?id=2099

            Bug ID: 2099
           Summary: [dpdk26.11-rc2] /drivers/net/xsc meson build failed
                    with EXTRA_CFLAGS='-O1' on Ubuntu26.04
           Product: DPDK
           Version: 26.11
          Hardware: All
                OS: All
            Status: UNCONFIRMED
          Severity: normal
          Priority: Normal
         Component: core
          Assignee: dev@dpdk.org
          Reporter: daxuex.gao@intel.com
  Target Milestone: ---

[Environment]
DPDK version:  dpdk26.11-rc2 (a13c1053360)
OS: 26.04.1 LTS/Linux 7.0.0-38-generic
Compiler: gcc (Ubuntu 15.2.0-16ubuntu1) 15.2.0

[Test Setup]
# build cmd: 
CC=gcc meson --optimization=1 --werror  -Dlibdir=lib  --default-library=static
x86_64-native-linuxapp-gcc 
ninja -C x86_64-native-linuxapp-gcc

[Output]
# ninja -C x86_64-native-linuxapp-gcc
[1541/3514] Compiling C object
drivers/libtmp_rte_net_xsc.a.p/net_xsc_xsc_vfio.c.o
FAILED: [code=1] drivers/libtmp_rte_net_xsc.a.p/net_xsc_xsc_vfio.c.o
gcc -Idrivers/libtmp_rte_net_xsc.a.p -Idrivers -I../drivers -Idrivers/net/xsc
-I../drivers/net/xsc -Ilib/ethdev -I../lib/ethdev -Ilib/eal/common
-I../lib/eal/common -I. -I.. -Iconfig -I../config -Ilib/eal/include
-I../lib/eal/include -Ilib/eal/linux/include -I../lib/eal/linux/include
-Ilib/eal/x86/include -I../lib/eal/x86/include -I../kernel/linux -Ilib/eal
-I../lib/eal -Ilib/kvargs -I../lib/kvargs -Ilib/log -I../lib/log -Ilib/metrics
-I../lib/metrics -Ilib/telemetry -I../lib/telemetry -Ilib/argparse
-I../lib/argparse -Ilib/net -I../lib/net -Ilib/mbuf -I../lib/mbuf -Ilib/mempool
-I../lib/mempool -Ilib/ring -I../lib/ring -Ilib/meter -I../lib/meter
-Idrivers/bus/pci -I../drivers/bus/pci -I../drivers/bus/pci/linux -Ilib/pci
-I../lib/pci -Idrivers/bus/vdev -I../drivers/bus/vdev
-fdiagnostics-color=always -D_FILE_OFFSET_BITS=64 -Wall -Winvalid-pch -Wextra
-Werror -std=c11 -O1 -include rte_config.h -Wvla -Wcast-qual -Wdeprecated
-Wformat -Wformat-nonliteral -Wformat-security -Wmissing-declarations
-Wmissing-prototypes -Wnested-externs -Wold-style-definition -Wpointer-arith
-Wshadow -Wsign-compare -Wstrict-prototypes -Wundef -Wwrite-strings
-Wno-packed-not-aligned -Wno-missing-field-initializers
-fzero-init-padding-bits=all -D_GNU_SOURCE -fPIC -march=native -mrtm
-DALLOW_EXPERIMENTAL_API -DALLOW_INTERNAL_API -Wno-format-truncation
-Wno-address-of-packed-member -Wno-vla -DRTE_COMPONENT_CLASS=pmd_net
-DRTE_COMPONENT_NAME=xsc -DRTE_LOG_DEFAULT_LOGTYPE=pmd.net.xsc -MD -MQ
drivers/libtmp_rte_net_xsc.a.p/net_xsc_xsc_vfio.c.o -MF
drivers/libtmp_rte_net_xsc.a.p/net_xsc_xsc_vfio.c.o.d -o
drivers/libtmp_rte_net_xsc.a.p/net_xsc_xsc_vfio.c.o -c
../drivers/net/xsc/xsc_vfio.c
../drivers/net/xsc/xsc_vfio.c: In function ‘xsc_vfio_modify_qp_status’:
../drivers/net/xsc/xsc_vfio.c:491:16: error: ‘ret’ may be used uninitialized
[-Werror=maybe-uninitialized]
  491 |         return ret;
      |                ^~~
../drivers/net/xsc/xsc_vfio.c:452:16: note: ‘ret’ was declared here
  452 |         int i, ret;
      |                ^~~
cc1: all warnings being treated as errors
[1654/3514] Compiling C object
drivers/libtmp_rte_net_mlx5.a.p/net_mlx5_mlx5_flow_hw.c.o
ninja: build stopped: subcommand failed.

[Regression]
Is this issue a regression: (Y/N)Y

[First bad commit]
commit b247199927a13dc964453c992caecddb5922dca4 (HEAD)
Author: Stephen Hemminger <stephen@networkplumber.org>
Date:   Thu Jul 23 10:59:05 2026 -0700

    net/hinic3: fix return value of FDIR enabling

    The code to enable fdir filter assumes entry is present.
    If not found it would return uninitialized value.

    Bugzilla ID: 1964
    Fixes: efa3b9b36fc7 ("net/hinic3: add flow control and filters")
    Cc: stable@dpdk.org

    Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>

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