<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/117855>117855</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            CMake 3.20.0 or higher is required. You are running version 3.16.3
        </td>
    </tr>

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

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

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

<pre>
    Hi,

when I run the following command to build llvm, I got the following error.
My os is Ubuntu:
```C
cat /etc/lsb-release
DISTRIB_ID=Ubuntu
DISTRIB_RELEASE=20.04
DISTRIB_CODENAME=focal
DISTRIB_DESCRIPTION="Ubuntu 20.04.6 LTS"
```

```C
cmake -G Ninja ../llvm \
 -DLLVM_ENABLE_PROJECTS=mlir \
   -DLLVM_BUILD_EXAMPLES=ON \
 -DLLVM_TARGETS_TO_BUILD="Native;NVPTX;AMDGPU" \
 -DCMAKE_BUILD_TYPE=Release \
 -DLLVM_ENABLE_ASSERTIONS=ON
```


```C
CMake Error at CMakeLists.txt:3 (cmake_minimum_required):
  CMake 3.20.0 or higher is required.  You are running version 3.16.3


-- Configuring incomplete, errors occurred!
See also "/root/data/code_python/llvm-project-main/build/CMakeFiles/CMakeOutput.log".
See also "/root/data/code_python/llvm-project-main/build/CMakeFiles/CMakeError.log".
```




</pre>
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