<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/57968>57968</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            `-fconcepts-diagnostics-depth` not accepted
        </td>
    </tr>

    <tr>
      <th>Labels</th>
      <td>
            new issue
      </td>
    </tr>

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

    <tr>
      <th>Reporter</th>
      <td>
          mkoncek
      </td>
    </tr>
</table>

<pre>
    Invoking `clang` with all the flags I normally give to `g++` gives me:
`clang-15: error: unknown argument: '-fconcepts-diagnostics-depth=2'`

I don't know what the policy regarding compatibility with GCC flags is, but maybe consider accepting this flag and just warn the user that this flag is invalid in `clang`.
</pre>
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