<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/61896>61896</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            flang: c_long_double has a wrong values on many platforms.
        </td>
    </tr>

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

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

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

<pre>
    `long double` is the same as `double` on many platforms MINGW/aarch64, MSVC, macOS-aarch64.
It should have value of 8 on https://github.com/llvm/llvm-project/blob/ed372d194f938b750855ad1297517d26f1102250/flang/module/iso_c_binding.f90#L56:L60
I tried to fix it, but Flang doesn't predefine many macros, there is no macros for OSs, CPUs, Platforms. There is only `__x86_64__`  (other than flang, openmp and openacc directives).
</pre>
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