# File lib/rake.rb, line 1877
1877:     def const_warning(const_name)
1878:       @const_warning ||= false
1879:       if ! @const_warning
1880:         puts %{WARNING: Deprecated reference to top-level constant '#{const_name}'} +
1881:           %{found at: #{rakefile_location}} # '
1882:         puts %{    Use --classic-namespace on rake command}
1883:         puts %{    or 'require "rake/classic_namespace"' in Rakefile}
1884:       end
1885:       @const_warning = true
1886:     end