cscope 一个emacs(类似vi的编辑器)插件，附带源码，下载后，把文件名改称cscope.src.tar.bz2，然后再解压缩。这里不支持bz2-cscope an emacs (similar to vi editor) plug-ins, with source code, download, the file name renamed cscope.src.tar.bz2, and then extract. Here do not support bz2