[DPDK/core Bug 1509] Build failure on Ubuntu 24.04 with Link Time Optimization (LTO)

[DPDK/core Bug 1509] Build failure on Ubuntu 24.04 with Link Time Optimization (LTO)

[bugzilla]

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https://bugs.dpdk.org/show_bug.cgi?id=1509

            Bug ID: 1509
           Summary: Build failure on Ubuntu 24.04 with Link Time
                    Optimization (LTO)
           Product: DPDK
           Version: 24.07
          Hardware: x86
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: Normal
         Component: core
          Assignee: dev@dpdk.org
          Reporter: alialnu@nvidia.com
  Target Milestone: ---

$ meson --werror -Db_lto=true -Dc_args='-O3'
-Ddisable_drivers=net/ena,net/tap,*/octeontx,*/cnxk build && ninja -C build
[..]
[2453/2453] Linking target app/dpdk-test
In function ‘memcpy’,
    inlined from ‘test_argparse_copy’ at ../app/test/test_argparse.c:94:3,
    inlined from ‘test_argparse_init_obj’ at ../app/test/test_argparse.c:106:2,
    inlined from ‘test_argparse_invalid_basic_param’ at
../app/test/test_argparse.c:116:8:
/usr/include/x86_64-linux-gnu/bits/string_fortified.h:29:10: warning:
‘__builtin___memcpy_chk’ writing 48 bytes into a region of size 0 overflows the
destination [-Wstringop-overflow=]
[..]

OS: Ubuntu 24.04
Meson: 1.3.2
Compiler: gcc 13.2.0

(Note: some drivers are disabled because they report other errors)

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[DPDK/core Bug 1509] Build failure on Ubuntu 24.04 with Link Time Optimization (LTO)

[bugzilla]

http://bugs.dpdk.org/show_bug.cgi?id=1509

Stephen Hemminger (stephen@networkplumber.org) changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |RESOLVED
         Resolution|---                         |FIXED
                 CC|                            |stephen@networkplumber.org

--- Comment #2 from Stephen Hemminger (stephen@networkplumber.org) ---
commit 3fc246e883c412f3c285bcabdb402b7d66e78526
Author: Stephen Hemminger <stephen@networkplumber.org>
Date:   Tue Sep 9 06:49:52 2025 -0700

    test/argparse: change initialization to workaround LTO

    When compiled with Link Time Optimization, the existing code
    generated an error, because the compiler was unable to intuit
    that there was space in the flexible array.

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