class Rake::Application

def const_warning(const_name)
  @const_warning ||= false
  if ! @const_warning
    $stderr.puts %{WARNING: Deprecated reference to top-level constant '#{const_name}' } +
      %{found at: #{rakefile_location}} # '
    $stderr.puts %{    Use --classic-namespace on rake command}
    $stderr.puts %{    or 'require "rake/classic_namespace"' in Rakefile}
  end
  @const_warning = true
end