<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/63101>63101</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            Clang-tidy hangs
        </td>
    </tr>

    <tr>
      <th>Labels</th>
      <td>
      </td>
    </tr>

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

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

<pre>
    We have a project that consists of several sub-projects which is built using cmake and ninja. clang-tidy is invoked via CMAKE_CXX_CLANG_TIDY.

Compiling the project without clang-tidy takes a couple of minutes. With clang-tidy 15, it takes about half an hour. Clang 16 just hangs when it reaches one of the sub-projects and needs to be killed after many hours of running without producing any output (6 processes consuming 100% CPU each on an M1 Mac).

CMAKE_VERBOSE_MAKEFILE is not helping.

I am not sure how to get more information, as I am not very familiar with the tool (it is usually invoked automatically by cmake), so any suggestion is appreciated!
</pre>
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