通过cflow，tree2dotx，graphviz创建c语言文件的函数调用关系图，并集成为一条命令
tree2dotx.sh 转自CSDN-cflow——C语言函数调用关系生成器
等待添加功能：检查文件是否存在、不显示某一函数/系统函数、自动识别类型
带星号(*)的是默认选项
cgraph [-a <NUM>] [-d <NUM>] [-e <NUM>] [-r <NUM>] [-f <file1 file2...>] [-m <MODE>] [-T <TYPE>] [-o <NAME>] [-h]
-a [NUM] :
| NUM | function |
|---|---|
| 0 | Produce graphs only for main function(*) |
| 1 | Produce graphs for all global functions |
| 2 | Produce graphs for all functions |
-d [NUM] :
Set the depth at which the flow graph is cut of
-e [NUM] :
| NUM | function |
|---|---|
| 0 | Disable display file name where the function is located |
| 1 | Enable display file name where the function is located(*) |
-r [NUM] :
| NUM | function |
|---|---|
| 0 | Disable output in the order in which the functions appear |
| 1 | Enable output in the order in which the functions appear(*) |
-f [filename]:
The files you want to produce call graph, default: all .c file in the folder
use "filename1 filename2" to set multiple files as input
-m [MODE] :
| MODE | description |
|---|---|
| dot | Digraph (layering)(*) |
| neato | Based on spring-model |
| twopi | Radial layout |
| circo | Circle layout |
| fdp | Undigraph |
| patchwork | Square tree |
-T [TYPE] :
| TYPE | function |
|---|---|
| jpg | Output .jpg file(*) |
| png | Output .png file |
| gif | Output .gif file |
| svg | Output .svg file |
-o [FILENAME] :
output file name, default: a.out
-h :
Get help infomation
创建一个包含 a.c和b.c中所有函数的，不按函数出现顺序输出的，显示函数所在文件名的函数调用图，输出为test.svg
cgraph -a 2 -r 0 -T svg -o test.svg
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