<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/102811>102811</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            [llvm-18.1.8] cmake configuration
        </td>
    </tr>

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

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

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

<pre>
    version: [18.1.8](https://github.com/llvm/llvm-project/releases/download/llvmorg-18.1.8/llvm-18.1.8.src.tar.xz)
log: [cmake log](https://gist.github.com/astralchan/744e55e17a96189da36b1880b1053f49)

# Issue

When building from the llvm-18.1.8 source in release tarballs, CMakeLists.txt:6 looks for

* `Modules` directory instead of the existing `modules` directory
* a file `CMakePolicy.cmake` not contained within `modules` 

# Reproduce

```
curl -LO https://github.com/llvm/llvm-project/releases/download/llvmorg-18.1.8/llvm-18.1.8.src.tar.xz
tar -Jxf llvm-18.1.8.src.tar.xz
cd llvm-18.1.8.src
cmake -B llvm-build -DCMAKE_BUILD_TYPE=Release > LOG.txt 2>&1
```

Possibly related to [issue #65453](https://github.com/llvm/llvm-project/issues/65453).
</pre>
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