[Doxygen] How to use doxygen to create diagram

1. Install package
   pacman -S doxygen graphviz
   
2. Goto the top directory of source code, and create doxygen configuration.
   doxygen -g a.conf
   
   
   # vim a.conf

    EXTRACT_ALL            = YES
    HAVE_DOT               = YES
    UML_LOOK               = YES

    EXTRACT_PRIVATE        = YES
    EXTRACT_STATIC         = YES
    CALL_GRAPH             = YES
    OUTPUT_DIRECTORY       = /tmp/doc/
# The RECURSIVE tag can be used to specify whether or not subdirectories should
# be searched for input files as well.
    RECURSIVE              = YES

#---------------------------------------------------------------------------
# Configuration options related to source browsing
#---------------------------------------------------------------------------
SOURCE_BROWSER         = YES

3. run doxygen to create html
doxygen a.conf

Reference:

• How to use doxygen to create UML class diagrams from C++ source
• Generating a callgraph by using Doxygen and Graphviz