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[204.195.112.43]) by smtp.gmail.com with ESMTPSA id 98e67ed59e1d1-3b16774309bsm1729408a91.14.2026.11.09.18.04.40 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 09 Nov 2026 18:04:40 -0800 (PST) From: Stephen Hemminger To: dev@dpdk.org Cc: Stephen Hemminger , Eimear Morrissey , Konstantin Ananyev Subject: [PATCH] test: fix soring build with LTO Date: Mon, 9 Nov 2026 18:04:37 -0800 Message-ID: <20261110020438.420106-1-stephen@networkplumber.org> X-Mailer: git-send-email 2.53.0 X-Archived-By: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: DPDK patches and discussions List-Archive: List-Post: List-Help: List-Subscribe: , X-Spam-Status: No, score=-16.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, USER_AGENT_GIT autolearn=ham autolearn_force=no version=4.0.1 X-Spam-Checker-Version: SpamAssassin 4.0.1 (2024-03-26) on aws-us-west-2-korg-listserv-alma10-1 With LTO, gcc inlines rte_soring_acquirx_bulk() into test_soring_stages(). The element copy switches on the runtime r->esize, so the 16-byte copy path stays live and gcc reports -Wstringop-overflow writing into the 32 x uint32_t stack arrays. That path is never taken since the ring is created with 4 byte elements and metadata. The diagnostic is emitted by lto1 at link time, so it cannot be silenced from lib/ring. Disable it for the dpdk-test link only when LTO is enabled with gcc; non-LTO builds are unchanged. Bugzilla ID: 2101 Fixes: 70581c355d69 ("test/ring: add unit tests for soring API") Signed-off-by: Stephen Hemminger --- app/test/meson.build | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/app/test/meson.build b/app/test/meson.build index 2f1cd817cd..d16ca9f287 100644 --- a/app/test/meson.build +++ b/app/test/meson.build @@ -277,6 +277,12 @@ extra_flags = [ '-fno-strict-aliasing', ] +# LTO inlines soring acquire into the test, gcc then flags the +# unreachable 16-byte element copy path (false positive). +if get_option('b_lto') and cc.get_id() == 'gcc' + ldflags += '-Wno-stringop-overflow' +endif + foreach arg: extra_flags if cc.has_argument(arg) cflags += arg -- 2.53.0