<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/78516>78516</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            openmp and libc fail to compile with dynamic hsa
        </td>
    </tr>

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

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

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

<pre>
    Both in tree runtimes use HSA_AMD_AGENT_INFO_TIMESTAMP_FREQUENCY which is a value in an enum, https://github.com/ROCm/ROCR-Runtime/blob/master/src/inc/hsa.h#L463

The in tree dynamic_hsa/hsa.h doesn't define this, so that doesn't compile. Discovered while trying to build libc on a system with an amdgpu and no hsa.h.

We don't have a great story for versioning hsa and generally handling mismatch between header and library. For timestamp frequency, failing to get it is a soft error anyway, so we should probably just add the enum to the in tree hsa.h.

Other interesting option would be to put a `#define LLVM_DYNAMIC_HSA_IN_USE` or similar in the header and branch over the uses of things that aren't defined in that header, which feels like a path to a mess.

Creating a task instead of fixing as I'm not sure what the right fix is here.
</pre>
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