<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/81695>81695</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            "ld: Undefined symbols" with `Clang/LLVM 15.0.0` and `ifort 2021.7.0.20220726`
        </td>
    </tr>

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

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

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

<pre>
    Dear LLVM maintainers,

My project at 

https://github.com/libprima/prima 

fails to build with `Clang/LLVM 15.0.0` and `ifort 2021.7.0.20220726`. 

See https://github.com/libprima/prima/actions/runs/7894696232/job/21545822585

Note, however, that the following run was successful:

https://github.com/libprima/prima/actions/runs/7894650578/job/21545696890

Checking the runner images (See "Set up job" section of the log), I found the following. 

Failure (for https://github.com/libprima/prima/actions/runs/7894696232/job/21545822585):
```
 Image: macos-13
  Version: 20240204.1
  Included Software: https://github.com/actions/runner-images/blob/macos-13/20240204.1/images/macos/macos-13-Readme.md
 Image Release: https://github.com/actions/runner-images/releases/tag/macos-13%2F20240204.1
```

Success (for https://github.com/libprima/prima/actions/runs/7894650578/job/21545696890): 
```
  Image: macos-13
  Version: 20240114.1
  Included Software: https://github.com/actions/runner-images/blob/macos-13/20240114.1/images/macos/macos-13-Readme.md
 Image Release: https://github.com/actions/runner-images/releases/tag/macos-13%2F20240114.1
```

We can see that the two runs used different versions of the image. In particular, following the "Included Software" link, I find that the failing run used `Clang/LLVM 15.0.0`, while the successful one used `Clang/LLVM 14.0.3`.  I am not sure whether this is the reason for the failure (doesn't `clang` provide `ld` on macOS-13?).

I also note that `gfortran` works fine (maybe due to the `ld` it uses?).

Thanks for taking a look.

Best regards,
Zaikun
</pre>
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