# File lib/rake.rb, line 1425
1425:     def const_warning(const_name)
1426:       @const_warning ||= false
1427:       if ! @const_warning
1428:         puts %{WARNING: Deprecated reference to top-level constant '#{const_name}'} +
1429:           %{found at: #{rakefile_location}}
1430:         puts %{    Use --classic-namespace on rake command}
1431:         puts %{    or 'require "rake/classic_namespace"' in Rakefile}
1432:       end
1433:       @const_warning = true
1434:     end