text: #!/bin/bash
  
  # This shell script logic is isolated into a separate shell script because it is a problem to call it from m4 files in autoconf.
  
  echo `clang --version | grep -o 'version[\ ]\([1][0-1]\|[7-9]\)\.[0-9]*\.[0-9]*' | grep -o '\([1][0-1]\|[7-9]\)\.[0-9]*\.[0-9]*' | cut -d\. -f1`
  