<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/66022>66022</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            [clang-tidy] how to tell the difference at preprocessor time between clang-tidy and llvm
        </td>
    </tr>

    <tr>
      <th>Labels</th>
      <td>
            clang-tidy,
            new issue
      </td>
    </tr>

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

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

<pre>
    I need to be able to exclude certain includes and sections of code when using clang-tidy but not when compiling with LLVM. It seems that both clang-tidy and LLVM define `__clang__` and `__llvm__` which is how I usually differentiate LLVM from GCC.

What preprocessor check can I do to handle this?
</pre>
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