rscons/build_tests/simple/register_target_in_build_hook.rb

build do
  Environment.new do |env|
    env.Program("simple.exe", Dir["*.c"])
    env.add_build_hook do |build_op|
      if build_op[:target].end_with?(".o")
        env.Disassemble("#{build_op[:target]}.txt", build_op[:target])
      end
    end
  end
end