Gem::Ext::Builder.make

# File tmp/rubies/ruby-4.1.0-preview1/lib/rubygems/ext/builder.rb, line 24
def self.make(dest_path, results, make_dir = Dir.pwd, sitedir = nil, targets = ["clean", "", "install"],
  target_rbconfig: Gem.target_rbconfig, n_jobs: nil)
  unless File.exist? File.join(make_dir, "Makefile")
    # No makefile exists, nothing to do.
    raise NoMakefileError, "No Makefile found in #{make_dir}"
  end

  # try to find make program from Ruby configure arguments first
  target_rbconfig["configure_args"] =~ /with-make-prog\=(\w+)/
  make_program_name = ENV["MAKE"] || ENV["make"] || $1
  make_program_name ||= RUBY_PLATFORM.include?("mswin") ? "nmake" : "make"
  make_program = shellsplit_command(make_program_name)

  is_nmake = /\bnmake/i.match?(make_program_name)
  # The installation of the bundled gems is failed when DESTDIR is empty in mswin platform.
  destdir = !is_nmake || ENV["DESTDIR"] && ENV["DESTDIR"] != "" ? format("DESTDIR=%s", ENV["DESTDIR"]) : ""

  # nmake doesn't support parallel build
  unless is_nmake
    have_make_arguments = make_program.size > 1
    n_jobs ||= 0

    if !have_make_arguments && n_jobs > 1 && !ENV["MAKEFLAGS"]&.match(/-j\d*(\s|\Z)/)
      make_program << "-j#{n_jobs}"
    end
  end

  env = [destdir]

  if sitedir
    env << format("sitearchdir=%s", sitedir)
    env << format("sitelibdir=%s", sitedir)
  end

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