<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/147304>147304</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            Support for /Zc:preprocessor in clang-cl
        </td>
    </tr>

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

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

    <tr>
      <th>Reporter</th>
      <td>
          evg656e
      </td>
    </tr>
</table>

<pre>
    There is a new option for MSVC that makes the preprocessor standard-compliant: [Microsoft Documentation](https://learn.microsoft.com/en-us/cpp/build/reference/zc-preprocessor?view=msvc-170). As of LLVM 20.1.6, clang-cl ignores this option, which allows the writing of ill-formed macros. It be nice to have this option working in clang-cl.

Other reports can be found here: [Stack Overflow](https://stackoverflow.com/questions/76850822/clang-cl-vs-new-msvc-preprocessor).
</pre>
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