Make static call graphs.
GNU.
Not perfect nor ultra-powerful, but comes in handy when reading code.
https://en.wikipedia.org/wiki/GNU_cflow
http://www.gnu.org/software/cflow/
Usage:
cflow main.c
Sample output:
main() <int main () at main.c:49>:
printA()
printMain() <void printMain () at main.c:40>:
printf()
printf()
TODO C++ method? Does not seem to work.
TODO ignore #include / other files. Otherwise too much stdlib trash. -d may help... Can't even find a thread for that.