Plot the dependency graph with graphviz

[wallento]

The idea is to plot a dependency graph for the given core/system

[olofk]

I LOVE it! Where's the code? :)

[wallento]

Here: #99 :)

[wallento]

[m-kru]

@olofk What is the status of generating dependency graph functionality? It would be useful for working on parallelization and caching analysis results as described in https://forums.ohwr.org/t/hdlmake-vs-fusesoc/848312/8.

[imphil]

There are patches to get such a graph in the OpenTitan version of fusesoc, you can install it with pip3 install git+https://github.com/lowRISC/fusesoc.git@ot#egg=fusesoc. This branch depends on a couple other things which need to go upstream first in a "proper" way (we do some things there which break backwards-compatibility).

[m-kru]

@imphil How is OpenTitan version FuseSoc different than FuseSoc? Any why are there more than one FuseSoc version?

[imphil]

It's just a version with patches which are not yet upstream, you can find the git repository at https://github.com/lowRISC/fusesoc in the ot branch