<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/62993>62993</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            Improvement Request: Clarification on Building OpenMP - `-DLLVM_ENABLE_PROJECTS` or `-DLLVM_ENABLE_RUNTIMES`
        </td>
    </tr>

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

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

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

<pre>
    I would like to suggest a clarification regarding the appropriate method for building OpenMP within LLVM. Based on the discussions in the following topics:

- [**Discourse:** Cannot build a debug version of LLVM due to libopenmptarget problem](https://discourse.llvm.org/t/cannot-build-a-debug-version-of-llvm-due-to-libopenmptarget-problem/70851)
- [**Discourse:** OpenMP project or runtime?](https://discourse.llvm.org/t/openmp-project-or-runtime/70886)

It is recommended that OpenMP be built as a runtime, as it relies on freshly-built Clang and LLVM tools. However, I have come across three instances where it is suggested to be built as a project.

- [Getting Started — The Flang Compiler](https://flang.llvm.org/docs/GettingStarted.html#building-flang-in-tree)
- https://github.com/llvm/llvm-project/blob/main/clang/utils/analyzer/entrypoint.py#L56
- https://github.com/llvm/llvm-project/blob/main/llvm/utils/release/build_llvm_release.bat#L155

To avoid confusion and ensure consistency, it would be beneficial to update the relevant documentation and scripts to reflect the recommended approach of building OpenMP as a runtime.

Thank you for your attention to this matter.
</pre>
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