cygwin下安装c语言开发环境
1、到官网cygwin.com下载安装程序。
2、添加清华的cygwin镜像：https://mirrors.tuna.tsinghua.edu.cn/cygwin/
3、在安装：vim，git，gcc，g++，make
4、到kernel.org下载文档：https://mirrors.edge.kernel.org/pub/linux/docs/man-pages/Archive/
5、修改默认HOME目录，在我的电脑->环境变量中添加“HOME"变量，并把值设为修改后的目录。
6、完毕
附录：How to change cygwin hostname
Cygwin reads the host name from Windows. On Windows 7 (instructions will be similar for other versions of Windows) you can change this by doing the following:
- Open Control Panel
- Click System and Security
- Click System
- Under "Computer name, domain, and workgroup settings", click Change Settings
- Next to "To rename this computer…" click "Change…"
- Enter your desired host name in the "Computer name" box then click OK twice.
To simply change the Bash prompt, however, you don't need to jump through those hoops. The Bash prompt is controlled by the PS1 environment variable, and there're extensive instructions in the Bash man pages under "Prompting".
For example, to temporarily set your Bash prompt to Howdy>, you can use the following command:
PS1='Howdy> '
While to set it whenever you restart the Bash shell, use the following to add it to your .bashrc file (which is run whenever Bash is started).
echo 'PS1="Howdy> "' >>~/.bashrc
