<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/84752>84752</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            build fail:  version `GLIBCXX_3.4.20' not found
        </td>
    </tr>

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

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

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

<pre>
    I encountered the error `/lib64/libstdc++.so.6: version `GLIBCXX_3.4.20' not found required by bin/llvm-min-tblgen` when building clang-17 from source. What I'm more confused about is why such a problem still occurs when I build clang17 from the *source code*. Although setting LD_LIBRARY_PATH and specifying a higher version of libstdc++ can bypass it, the binary compiled in this way also needs to set LD_LIBRARY_PATH to run. Is it a problem with my option settings?

build command
```
cmake -G Ninja -DCMAKE_C_COMPILER=gcc-10.3.0/bin/gcc -DCMAKE_CXX_COMPILER=gcc-10.3.0/bin/g++ -DLLVM_TEMPORARILY_ALLOW_OLD_TOOLCHAIN=ON -DLLVM_TARGETS_TO_BUILD=X86 -DLLVM_USE_LINKER=lld -DLIBCXXABI_ENABLE _SHARED=OFF -DLIBCXX_ENABLE_SHARED=OFF '- DLLVM_ENABLE_RUNTIMES=libcxx;libcxxabi' -DCMAKE_BUILD_TYPE=Release '-DLLVM_ENABLE_PROJECTS=clang;lld;compiler-rt;bolt' ../llvm-project-llvmorg-17.0.6/llvm
ninja
```
</pre>
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