requirements_ubuntu_define_libssl()
{
  # Legacy libssl-dev required by older version of ruby has been renamed to libssl1.0-dev
  # starting from Ubuntu 17.10 (Artful Aardvark)

  case "$1" in
    (ruby-2.3*|ruby-2.2*|ruby-2.1*|ruby-2.0*|ruby-1.9*|ruby-1.8*)
      if
        __rvm_version_compare ${_system_version} -ge 17.10
      then
        undesired_check libssl-dev
        requirements_check libssl-dev
      else
        requirements_check libssl-dev
      fi
      ;;

    (*)
      requirements_check libssl-dev
      ;;
  esac
}