<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/100376>100376</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            [Flang] Irritating warning about NUMERIC_STORAGE_SIZE while not used
        </td>
    </tr>

    <tr>
      <th>Labels</th>
      <td>
            flang
      </td>
    </tr>

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

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

<pre>
    In the following code, `NUMERIC_STORAGE_SIZE` is not being used (and technically not visible):

```Fortran
program reproducer
    use iso_fortran_env, only: output_unit
    implicit none
end program reproducer
```

Flang still a warning, when compiling the file like this:

```
> flang-new -fdefault-real-8 -c reproducer.f90
reproducer.f90:2:9: warning: NUMERIC_STORAGE_SIZE from ISO_FORTRAN_ENV is not well-defined when default INTEGER and REAL are not consistent due to compiler options
      use iso_fortran_env, only: output_unit
          ^^^^^^^^^^^^^^^
```

Should this warning be issued when `NUMERIC_STORAGE_SIZE` is not visible?
</pre>
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