class Gem::Ext::RakeBuilder

# File lib/rubygems/ext/rake_builder.rb, line 12
def self.build(extension, directory, dest_path, results, args=[])
  if File.basename(extension) =~ /mkrf_conf/i then
    cmd = "#{Gem.ruby} #{File.basename extension}"
    cmd << " #{args.join " "}" unless args.empty?
    run cmd, results
  end

  # Deal with possible spaces in the path, e.g. C:/Program Files
  dest_path = '"' + dest_path.to_s + '"' if dest_path.to_s.include?(' ')

  rake = ENV['rake']

  rake ||= begin
             "\"#{Gem.ruby}\" -rubygems #{Gem.bin_path('rake', 'rake')}"
           rescue Gem::Exception
           end

  rake ||= Gem.default_exec_format % 'rake'

  cmd = "#{rake} RUBYARCHDIR=#{dest_path} RUBYLIBDIR=#{dest_path}" # ENV is frozen

  run cmd, results

  results
end