Ubuntu 20.04.1 LTS cscope设置

OS: Ubuntu 20.04.1 LTS
vim version: VIM - Vi IMproved 8.1 (2018 May 18, compiled Apr 15 2020 06:40:31)
And it supports cscope feature from the output of “vim --version”.

Steps:
1.apt-get install cscope
2.cscope --version
3.Use a similar script as gentags in Reference #1 to generate both cscope.files and cscope.out. The latter will be used by the VIM plugin.
4.VIM cscope plugin for keybindings or key maps

mkdir -p ~/.vim/plugin
cd .vim/plugin/
wget http://cscope.sourceforge.net/cscope_maps.vim

Let’s see something interesting in this .vim file:

cscope database generated by Step 3, which will used by cscope.

    " add any cscope database in current directory
    if filereadable("cscope.out