def self.build(extension, directory, dest_path, results, args=[], lib_dir=nil)
if File.basename(extension) =~ /mkrf_conf/i then
cmd = "#{Gem.ruby} #{File.basename extension}".dup
cmd << " #{args.join " "}" unless args.empty?
run cmd, results
end
dest_path = '"' + dest_path.to_s + '"' if dest_path.to_s.include?(' ')
rake = ENV['rake']
rake ||= begin
"#{Gem.ruby} -rrubygems #{Gem.bin_path('rake', 'rake')}"
rescue Gem::Exception
end
rake ||= Gem.default_exec_format % 'rake'
cmd = "#{rake} RUBYARCHDIR=#{dest_path} RUBYLIBDIR=#{dest_path}"
run cmd, results
results
end