<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/138719>138719</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            Unrelated CI failure: "'OMP.inc' has been modified since the precompiled header was built"
        </td>
    </tr>

    <tr>
      <th>Labels</th>
      <td>
            new issue
      </td>
    </tr>

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

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

<pre>
    I am seeing what seems to be unrelated build failures in the CI of my pull request ( #138348 ). Buildkit build https://buildkite.com/llvm-project/github-pull-requests/builds/175644#0196a28c-cb72-4e3e-8b23-be32984cde65

The problematic part seems to be:
```
FAILED: tools/flang/lib/Semantics/CMakeFiles/FortranSemantics.dir/canonicalize-acc.cpp.o
fatal error: file '/var/lib/buildkite-agent/builds/linux-56-59b8f5d88-qkh8m-1/llvm-project/github-pull-requests/build/include/llvm/Frontend/OpenMP/OMP.inc' has been modified since the precompiled header '/var/lib/buildkite-agent/builds/linux-56-59b8f5d88-qkh8m-1/llvm-project/github-pull-requests/build/tools/flang/lib/Semantics/CMakeFiles/FortranSemantics.dir/cmake_pch.hxx.pch' was built: size changed (was 373865, now 373849)
note: please rebuild precompiled header '/var/lib/buildkite-agent/builds/linux-56-59b8f5d88-qkh8m-1/llvm-project/github-pull-requests/build/tools/flang/lib/Semantics/CMakeFiles/FortranSemantics.dir/cmake_pch.hxx.pch'
FAILED: tools/flang/lib/Semantics/CMakeFiles/FortranSemantics.dir/semantics.cpp.o
fatal error: file '/var/lib/buildkite-agent/builds/linux-56-59b8f5d88-qkh8m-1/llvm-project/github-pull-requests/build/include/llvm/Frontend/OpenMP/OMP.inc' has been modified since the precompiled header '/var/lib/buildkite-agent/builds/linux-56-59b8f5d88-qkh8m-1/llvm-project/github-pull-requests/build/tools/flang/lib/Semantics/CMakeFiles/FortranSemantics.dir/cmake_pch.hxx.pch' was built: size changed (was 373865, now 373849)
note: please rebuild precompiled header '/var/lib/buildkite-agent/builds/linux-56-59b8f5d88-qkh8m-1/llvm-project/github-pull-requests/build/tools/flang/lib/Semantics/CMakeFiles/FortranSemantics.dir/cmake_pch.hxx.pch'
```
</pre>
<img width="1" height="1" alt="" src="http://email.email.llvm.org/o/eJzsVk2L5DYQ_TXypbCRJX_IBx88szEMZMhCknOQ5WpbGVnySvL07Pz6oJ7e3l1yypIQSBZ8KFGoSu9VPfxkCHqxiD2p70j9LpNHXJ3vH2V8xbtscvPH_gHkBgFR2wXOq4wp3gJEBxPCYT0aGXGG6dBmhpPU5vAYQFuIK8L9A7gTbB9hP4wBjx8ODBEIE0AYL7ngVYq6Au7S9Scdr3XWGPdA-EDYSNg4XZNYKLcRNhrzvOW7d7-jioSNi47rMeWpRX5tET7dSkHZ1k1VEcZp2TWSCZWrqWV5hRxzMTGeT8hZJyo1Y1MTOhA6_LIi7N5NBjcZtYJd-q-Ap6fRgTT0-tFhHB5-_OEd4QNE50xqezLSLum1eiJs_Bk3aaNWKXP_KJ9w1AbTYXQ-emlv-WLWnrBRSeusVtLoV8ylUoXa98IROpxklAbQe-dTt5M2CIS1hI3P0t_a3SjL5YI2fkmH0fZ4yesmr7tJnOpZiPzD0yq2vPxr1BI2aqvMMeP1XgLjnY1oU-6nHe3j-xQ8vi-0VYS1sMoAE6KFzc36pHGGoK3Cy6rsHpXbdm1whhXljP5fg_U3TXCTT_jbrtZifXkpdrUmBs6JgUObmGYX9CuCWqVdcE6iSEnectHUhN2DdefLqeoI6wgdrItp72A3KAOCxzep_C94-wcEFm7n78r6D2zId2V9s7Juv7Fs7vnc8U5m2Jdt1dRV11GerX2pUIqyVK2gc9OKSjQouoarE8eadm2d6Z5RVtOaNmVT1ZQXlLNaNrxj1VR2SlFSUdykNkXCXTi_ZDqEA_uSi7bsMiMnNOHiQhizeIZLljCWTInvL2RNxxJIRY0OMXwuE3U02P968yH3D59MSJpoqsDab9fJ56ViLDu86b82Jm9T-8KV_HmwFyAXF_KG9LlnfwQAAP__U-AhGA">