<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/54315>54315</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            libclc CMake error: unknown arguments specified
        </td>
    </tr>

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

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

    <tr>
      <th>Reporter</th>
      <td>
          hwnam831
      </td>
    </tr>
</table>

<pre>
    I cannot build libclc in both llvm-13 and llvm-15 due to the following error:

`LLVM version: 
CMake Error at /home/hwnam/llvm-project/libclc/CMakeLists.txt:51 (if):
  if given arguments:

    "VERSION_LESS" "3.9.0"

  Unknown arguments specified`

It seems like the following function does not set the environmental variable $LLVM_VERSION correctly.
`execute_process( COMMAND ${LLVM_CONFIG} "--version"
                 OUTPUT_VARIABLE LLVM_VERSION
                 OUTPUT_STRIP_TRAILING_WHITESPACE )
message( "LLVM version: ${LLVM_VERSION}" )

if( ${LLVM_VERSION} VERSION_LESS ${LIBCLC_MIN_LLVM} )
        message( FATAL_ERROR "libclc needs at least LLVM ${LIBCLC_MIN_LLVM}" )
endif()`

Is there any additional argument/environment I need to build libclc?

</pre>
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