<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/66186>66186</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            Decision required for CWG GitHub Issue 422 on [basic.start.main]
        </td>
    </tr>

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

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

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

<pre>
    See https://github.com/cplusplus/CWG/issues/422.

In short, it is currently unclear what constitutes "use" of the `main` function and Clang implements this very aggressively. It is the only compiler which flags `decltype(main)`.

My suggested solution for the issue in [[basic.start.main] p3](https://eel.is/c++draft/basic.start.main#3) is
```diff
 The function main shall not be
-used
+odr-used
 within the program.
```
This would invalidate the current behavior because `decltype(main)` is not odr-use.

Is there a strong reason for LLVM to flag `decltype(main)` or is the suggested solution acceptable?
</pre>
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