<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/141464>141464</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            [LLVM] GCC15 prints thousands of warnings when compiling.
        </td>
    </tr>

    <tr>
      <th>Labels</th>
      <td>
      </td>
    </tr>

    <tr>
      <th>Assignees</th>
      <td>
      </td>
    </tr>

    <tr>
      <th>Reporter</th>
      <td>
          carlo-bramini
      </td>
    </tr>
</table>

<pre>
    I tried to build the latest development sources with GCC-15.1, the build process runs but I noticed that thousands of warnings like this one are printed on the console:
```
cc1plus: note: unrecognized command-line option ‘-Wno-unnecessary-virtual-specifier’ may have been intended to silence earlier diagnostics
```
Actually, the effect is just a warning message, but perhaps it would be worth to avoid it, if it's possible.
This flags seems to be added only here:
https://github.com/llvm/llvm-project/blob/926c2013231a030a52037528bac0ba124c35ac32/llvm/cmake/modules/HandleLLVMOptions.cmake#L888
by using a macro called `add_flag_if_supported()` into the code.
Unfurtunately, it seems that it doesn't detect that GCC is not understanding this option.
</pre>
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