<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/55067>55067</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            Missing diagnostics "warning: style of line directive is a GCC extension"
        </td>
    </tr>

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

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

    <tr>
      <th>Reporter</th>
      <td>
          pmor13
      </td>
    </tr>
</table>

<pre>
    ```
#13
int x;
```
```
$ clang -std=c11 -pedantic -Wall -Wextra -c
```
Expected:
```
<source>:1:2: warning: style of line directive is a GCC extension
```
Actual:
```
<nothing>
```
</pre>
<img width="1px" height="1px" alt="" src="http://email.email.llvm.org/o/eJydUMFuwyAM_RpyQYkIJOly4NC13U4770zATZgoREC27u_nZp0mVdUOk2z8LNvvPTEE8ylJx67B9oRtCRe1-IbWZ3om4vE6uNm7PWuodsqPtEzZELHXdU3LGYzy2Wpavirn8IVzjoqW-i7H4TyDzoDX2_saYpfCEjUQccCdGpNj0g8VvfXjBab86YCGI3XWAzU2IqF9B2oTVfR5t6NoAHyywd9V2Oq8KPeHvg95WqUONxuFkcL0oldFttmBfLEp4SJaUKMPCf8gUcL5_6xyXizRySnnOV3M8SeM0eZpGSodTtg49_5TyjmGN-TCFj0skBC0Les2xSRFxx542ww1azamZwKr0UfRaz0oAy0rnBrAJUnaRxT18EFXCsSk3RdWcsY5a3hT9w3CStcdByM2XQvNRnQDaRiclHXVxUcV4lhEuVoaljHh0NmU0-9Q4ReNHmCVQ3615ClEOZ9CrEWxKsvV-RfR3MV9">