[DPDK/eventdev Bug 1576] [dpdk24.11-rc2] DPDK build failed with EXTRA_CFLAGS='-O1' on Redhat9.4

[DPDK/eventdev Bug 1576] [dpdk24.11-rc2] DPDK build failed with EXTRA_CFLAGS='-O1' on Redhat9.4

[bugzilla]

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https://bugs.dpdk.org/show_bug.cgi?id=1576

            Bug ID: 1576
           Summary: [dpdk24.11-rc2] DPDK build failed with
                    EXTRA_CFLAGS='-O1' on Redhat9.4
           Product: DPDK
           Version: 24.11
          Hardware: All
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: Normal
         Component: eventdev
          Assignee: dev@dpdk.org
          Reporter: tingtingx.liao@intel.com
  Target Milestone: ---

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[DPDK/eventdev Bug 1576] [dpdk24.11-rc2] DPDK build failed with EXTRA_CFLAGS='-O1' on Redhat9.4

[bugzilla]

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https://bugs.dpdk.org/show_bug.cgi?id=1576

tingtingx.liao@intel.com (tingtingx.liao@intel.com) changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         Resolution|---                         |FIXED
             Status|UNCONFIRMED                 |RESOLVED

--- Comment #3 from tingtingx.liao@intel.com (tingtingx.liao@intel.com) ---
This issue has been fixed on higher versions of gcc(14.2+)
And by the description of the following comment, will close this ticket.

Comments from developers:
The warning message is due to the fact that the assembly code generated by GCC
may skip the initialization of the event variable at the O1 optimization, but
was replaced by other instructions in O2 and O3, therefore it compiles fine.

This issue does not need to be fixed considering the following reasons.
1. There is a rte_memcpy() at line number 699 which is copying response
information as event into this. So, that will initialize all the event fields.
We don't require to initialize events at the declaration.
2. O1 is an unusual, the default optimization level of DPDK is O3, the
functions in the report are inline functions, they will be integrated into
their callers at this level, skipping the initialization is not possible.
3. These warning messages appear only in the O1 optimization and not in O2 and
O3.
4. The compiler in JIRA is GCC 11.4.1, and there are no warning messages when
using Clang 19.1.3 and higher versions of GCC 14.2.1.

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