这个是移植freeBSD到嵌入式系统的手册，虽然Linux的移植很多，但是很多公司为了避免GPL协议而采用FreeBSD来移植，所以BSD的也是用的比较多的-This is a portable manual freeBSD to the embedded system, although many transplant Linux, but many companies in order to avoid the use of FreeBSD GPL agreement to transfer, so the use of BSD is also relatively more