最近要做 PF_RING 的程式開發，看了 Source Code 又看看 User Guide，還是不容易懂阿，於是拿了 Doxygen 來產生 Function 的關係圖，加快看 Code 的腳步
Doxygen 安裝
sudo apt-get install doxygen基本使用方式
doxygen -g Doxygen # 產生配置檔
vim Doxygen # 修改設定
doxygen Doxygen # 產生 doxygen document配置檔需要修改的內容
PROJECT_NAME = PROJECT_NAME
PROJECT_NUMBER = 1.0
OUTPUT_DIRECTORY = ../docs
CREATE_SUBDIRS = YES
EXTRACT_ALL = YES
OUTPUT_LANGUAGE = Chinese-Traditional # default: English
FULL_PATH_NAMES = NO # default: YES
EXTRACT_STATIC = YES # default: NO
FILE_PATTERNS = *.php
RECURSIVE = YES # default: NO
REFERENCED_BY_RELATION = YES # default: NO
REFERENCES_RELATION = YES # default: NO
INLINE_SOURCE = YES產生圖片要再多修改三行
HAVE_DOT = YES
UML_LOOK = YES
EXTRACT_ALL = YES