<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/88420>88420</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            Backport C++ stddef.h system pragma, regressed in LLVM 18
        </td>
    </tr>

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

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

    <tr>
      <th>Reporter</th>
      <td>
          ian-twilightcoder
      </td>
    </tr>
</table>

<pre>
    We should backport https://github.com/llvm/llvm-project/pull/88214 because it fixes a regression with -Wgnu-include-next.

/cherry-pick https://github.com/llvm/llvm-project/commit/3c4b673af05f53e8a4d1a382b5c86367ea512c9e
</pre>
<img width="1px" height="1px" alt="" src="http://email.email.llvm.org/o/eJyUkbtu5DAMRb9GbgQbMvWwXKjIJHCVbTe1LHFsbeQHJHkn8_eLMXaQOg1JgABxeI_NOUwroiHyQuRbZY8yb8kEu9blFmKY5uI2j6kaN383H0jzvB3R09G6z31Lhc6l7JnwFwIDgWEKZT7Gxm0LgSHGv89W72n7g64QGPYjRgKD1tAKOqKzR0YaCr2GL8zU0oRTwpzDttJbKDOtP6b1qMPq4uGxXvGrNIS9Efbyv8LgZkzpXu_Bff4cx23LEh4Dd2JUHbdXJq-So7bCt5ZrGKXTiqsOrWzB9Vh5w33Pe1uhabsWtNTAVDUb6XslpewdMOCil-AZSMU7Dow7rroqGGAgmGjbtpNKqKYfVafh2ivplOikIILhYkNsHozNlqYq5Hyg0VoAq6IdMeZTFMCKN3ouCcDDWzLnX-MxZSJYDLnk7ysllIjm8lT2SuBC4EJz8R6vzUzzPRdc6J7stFgCr08H6GlY6fv771-01dWRovlxvCdjPn0LYP8CAAD__2xMxZY">