Reduced call graph

[Nguyen Thai Ngoc Duy <pclouds@xxxxxxxxx>]

Hi,

Is it possible to ask "graph" to generate a call graph of all calls
from main() to specific function? If "graph" does not support it (I
suspect so after looking at graph.c), could you please give me a few
hints how to do it? I'm completely new to sparse.
-- 
Duy
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