make

# File lib/rubygems/ext/builder.rb, line 30
  def self.make(dest_path, results)
    unless File.exist? 'Makefile' then
      raise Gem::InstallError, 'Makefile not found'
    end

    # try to find make program from Ruby configure arguments first
    RbConfig::CONFIG['configure_args'] =~ /with-make-prog\=(\w+)/
    make_program = ENV['MAKE'] || ENV['make'] || $1
    unless make_program then
      make_program = (/mswin/ =~ RUBY_PLATFORM) ? 'nmake' : 'make'
    end

    destdir = '"DESTDIR=%s"' % ENV['DESTDIR'] if RUBY_VERSION > '2.0'

    ['clean', '', 'install'].each do |target|
      # Pass DESTDIR via command line to override what's in MAKEFLAGS
      cmd = [
        make_program,
        destdir,
        target
      ].join(' ').rstrip
      begin
        run(cmd, results, "make #{target}".rstrip)
      rescue Gem::InstallError
        raise unless target == 'clean' # ignore clean failure
      end
    end
  end