[xdot] show part of call graph

[GoogleCodeExporter]

I would like to have a feature showing part of a very complex call graph system.

For example, the complete call graph is
{
a->b
b->c
b->d
d->g
c->e
c->f
}
I would like to have a feature showing all the related part to node c, that is
{
a->b
b->c
c->e
c->f
}

but discard 
{
b->d
d->g
}

For a program with thousands of function, this feature will make life much 
easier. Thanks.

Original issue reported on code.google.com by trym...@gmail.com on 19 Jun 2010 at 2:47