def self.build(extension, dest_path, results, args=[], lib_dir=nil, extension_dir=Dir.pwd,
target_rbconfig=Gem.target_rbconfig)
if target_rbconfig.path
warn "--target-rbconfig is not yet supported for Rake extensions. Ignoring"
end
if /mkrf_conf/i.match?(File.basename(extension))
run([Gem.ruby, File.basename(extension), *args], results, class_name, extension_dir)
end
rake = ENV["rake"]
if rake
rake = Shellwords.split(rake)
else
begin
rake = ruby << "-rrubygems" << Gem.bin_path("rake", "rake")
rescue Gem::Exception
rake = [Gem.default_exec_format % "rake"]
end
end
rake_args = ["RUBYARCHDIR=#{dest_path}", "RUBYLIBDIR=#{dest_path}", *args]
run(rake + rake_args, results, class_name, extension_dir)
results
end