<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/139588>139588</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            Document supported libstdc++ versions
        </td>
    </tr>

    <tr>
      <th>Labels</th>
      <td>
            clang:frontend,
            libstdc++
      </td>
    </tr>

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

    <tr>
      <th>Reporter</th>
      <td>
          cor3ntin
      </td>
    </tr>
</table>

<pre>
    Clang carries a number of hacks for older libstdc++ versions, some for libstdc++ 4.4.

It would be useful to document the minimal version of libstdc++ we think Clang should be compatible with (which would hopefully be tested by CI), and from there, clean up any such workarounds we no longer need.
</pre>
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