class MyProgram < Rscons::Builder
  def run(options)
    target, sources, cache, env, vars = options.values_at(:target, :sources, :cache, :env, :vars)
    objects = env.build_sources(sources, [".o"], cache, vars)
    command = %W[gcc -o #{target}] + objects
    return false unless env.execute("#{name} #{target}", command)
    target
  end
end

Rscons::Environment.new do |env|
  env.add_builder(MyProgram.new)
  env.Object("simple.o", "simple.c")
  File.open("two.c", "wb") do |fh|
    fh.puts <<-EOF
      void two(void)
      {
      }
    EOF
  end
  env.MyProgram("simple.exe", ["simple.o", "two.c"])
end