从官网（http://www.apuebook.com/code3e.html）下载的源码

若执行make编译错误，提示：can't find -lbsd，则需要添加libbsd.a的静态链接库：
sudo apt-get install libbsd-dev


以下内容为原README
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Read the file called DISCLAIMER.

On Freebsd, type "gmake".
On other platforms, type "make" (as long as this is gnu make).

For FAQs, updated source code, and the lost chapter, see http://www.apuebook.com.
Please direct questions, suggestions, and bug reports to sar@apuebook.com.

Steve Rago
January 2013