<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/56893>56893</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            [C++20] [Modules] Module file of header units are not searchable
        </td>
    </tr>

    <tr>
      <th>Labels</th>
      <td>
            clang:modules
      </td>
    </tr>

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

    <tr>
      <th>Reporter</th>
      <td>
          ChuanqiXu9
      </td>
    </tr>
</table>

<pre>
    Currently we could only specify the dependent module file by `-fmodule-file` for headers units. But we can't search it by `-fprebuilt-module-path`.

 Although we could argue that header units have no name according to the spec,
it is naturally that we couldn't search it. But this is not user friendly enough.
</pre>
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