[Bug 992] [dpdk 21.11.1-rc1] drivers/net/cnxk/cnxk_ethdev_mtr meson build failed with cflag param optimization=1 on Ubuntu20.04 with GCC10.3

[bugzilla@dpdk.org]

https://bugs.dpdk.org/show_bug.cgi?id=992

            Bug ID: 992
           Summary: [dpdk 21.11.1-rc1] drivers/net/cnxk/cnxk_ethdev_mtr
                    meson build failed with cflag param optimization=1 on
                    Ubuntu20.04 with GCC10.3
           Product: DPDK
           Version: 19.11
          Hardware: All
                OS: All
            Status: UNCONFIRMED
          Severity: normal
          Priority: Normal
         Component: core
          Assignee: dev@dpdk.org
          Reporter: daxuex.gao@intel.com
  Target Milestone: ---

[DPDK version]
dpdk 21.11.1-rc1

[Bad commit]:
commit 713a4bc48c52058172520805373103c79ef17a3a (HEAD)
Author: Bruce Richardson <bruce.richardson@intel.com>
Date:   Wed Mar 16 13:45:43 2022 +0000

    doc: replace characters for (R) symbol in Linux guide

    [ upstream commit c265d58619e7fc0f72441faafec56a2a8633a15b ]

    Some IDEs, such as eclipse, complained on save about the use of special
    characters in the (R) symbol in linux GSG doc. We can replace those with
    the equivalent "|reg|" text, and including isonum.txt.

    Signed-off-by: Bruce Richardson <bruce.richardson@intel.com>


[OS version]:
gcc version 10.3.0(Ubuntu 10.3.0-1ubuntu1~20.04)
UB20.04/5.8.0-48-generic

[Test Setup]:
CC=gcc meson --optimization=1 --werror -Denable_kmods=True  -Dlibdir=lib 
--default-library=static x86_64-native-linuxapp-gcc 
ninja -C x86_64-native-linuxapp-gcc -j 10

[Ubuntu20.04 log as below]
Found ninja-1.9.0.git.kitware.dyndep-1.jobserver-1 at /usr/local/bin/ninja
ninja: Entering directory `x86_64-native-linuxapp-gcc'
[1128/3000] Compiling C object
drivers/libtmp_rte_net_cnxk.a.p/net_cnxk_cnxk_ethdev_mtr.c.o
FAILED: drivers/libtmp_rte_net_cnxk.a.p/net_cnxk_cnxk_ethdev_mtr.c.o
gcc -Idrivers/libtmp_rte_net_cnxk.a.p -Idrivers -I../drivers -Idrivers/net/cnxk
-I../drivers/net/cnxk -Ilib/ethdev -I../lib/ethdev -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
-Ilib/eal/common -I../lib/eal/common -Ilib/eal -I../lib/eal -Ilib/kvargs
-I../lib/kvargs -Ilib/metrics -I../lib/metrics -Ilib/telemetry
-I../lib/telemetry -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 -Ilib/cryptodev -I../lib/cryptodev -Ilib/rcu -I../lib/rcu
-Ilib/eventdev -I../lib/eventdev -Ilib/hash -I../lib/hash -Ilib/timer
-I../lib/timer -Ilib/security -I../lib/security -Idrivers/common/cnxk
-I../drivers/common/cnxk -Idrivers/mempool/cnxk -I../drivers/mempool/cnxk
-fdiagnostics-color=always -pipe -D_FILE_OFFSET_BITS=64 -Wall -Winvalid-pch
-Werror -O1 -include rte_config.h -Wextra -Wcast-qual -Wdeprecated -Wformat
-Wformat-nonliteral -Wformat-security -Wmissing-declarations
-Wmissing-prototypes -Wnested-externs -Wold-style-definition -Wpointer-arith
-Wsign-compare -Wstrict-prototypes -Wundef -Wwrite-strings
-Wno-address-of-packed-member -Wno-packed-not-aligned
-Wno-missing-field-initializers -Wno-zero-length-bounds -D_GNU_SOURCE -fPIC
-march=native -DALLOW_EXPERIMENTAL_API -DALLOW_INTERNAL_API
-Wno-format-truncation -flax-vector-conversions -Wno-strict-aliasing
-DRTE_LOG_DEFAULT_LOGTYPE=pmd.net.cnxk -MD -MQ
drivers/libtmp_rte_net_cnxk.a.p/net_cnxk_cnxk_ethdev_mtr.c.o -MF
drivers/libtmp_rte_net_cnxk.a.p/net_cnxk_cnxk_ethdev_mtr.c.o.d -o
drivers/libtmp_rte_net_cnxk.a.p/net_cnxk_cnxk_ethdev_mtr.c.o -c
../drivers/net/cnxk/cnxk_ethdev_mtr.c
In file included from ../drivers/net/cnxk/cnxk_ethdev.h:16,
                 from ../drivers/net/cnxk/cnxk_ethdev_mtr.c:5:
../drivers/net/cnxk/cnxk_ethdev_mtr.c: In function
‘cnxk_nix_mtr_policy_validate’:
../lib/ethdev/rte_mtr_driver.h:188:10: error: ‘str’ may be used uninitialized
in this function [-Werror=maybe-uninitialized]
  188 |   *error = (struct rte_mtr_error){
      |   ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
  189 |    .type = type,
      |    ~~~~~~~~~~~~~
  190 |    .cause = cause,
      |    ~~~~~~~~~~~~~~~
  191 |    .message = message,
      |    ~~~~~~~~~~~~~~~~~~~
  192 |   };
      |   ~
../drivers/net/cnxk/cnxk_ethdev_mtr.c:283:14: note: ‘str’ was declared here
  283 |  const char *str;
      |              ^~~
In file included from ../drivers/net/cnxk/cnxk_ethdev.h:16,
                 from ../drivers/net/cnxk/cnxk_ethdev_mtr.c:5:
../lib/ethdev/rte_mtr_driver.h:188:10: error: ‘str’ may be used uninitialized
in this function [-Werror=maybe-uninitialized]
  188 |   *error = (struct rte_mtr_error){
      |   ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
  189 |    .type = type,
      |    ~~~~~~~~~~~~~
  190 |    .cause = cause,
      |    ~~~~~~~~~~~~~~~
  191 |    .message = message,
      |    ~~~~~~~~~~~~~~~~~~~
  192 |   };
      |   ~
../drivers/net/cnxk/cnxk_ethdev_mtr.c:283:14: note: ‘str’ was declared here
  283 |  const char *str;
      |              ^~~
cc1: all warnings being treated as errors
[1197/3000] Generating rte_common_cnxk.sym_chk with a meson_exe.py custom
command
ninja: build stopped: subcommand failed.

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