build do
  Environment.new do |env|
    env["ASSUFFIX"] = %w[.ssss .sss]
    env["CFLAGS"] += %w[-S]
    env.Object("one.ssss", "one.c", "CPPFLAGS" => ["-DONE"])
    env.Object("two.sss", "two.c")
    env.Program("two_sources.exe", %w[one.ssss two.sss], "ASFLAGS" => env["ASFLAGS"] + %w[-x assembler])
  end
end