RE: Diagramming a makefile?

[Rakesh Sharma]

Hello Rainier,


Thanks for the detailed instructions on how to generate a graph from a make 
code.
That would be of immense help in me coming up & running in this activity.

Initially I would look for only the static kind of diagram generation as that's 
simpler.

Regards,
Rakesh


> Date: Tue, 15 Apr 2014 18:37:01 +0200
> From: address@hidden
> To: address@hidden
> Subject: Re: Diagramming a makefile?
> 
> Op di 15 apr 2014 04:00:16 GMT schreef address@hidden (Rakesh Sharma):
> > 
> >  Hello Reinier,
> > 
> > Thanks for the pointers regarding the MAKAO utiliity as well as
> > your local solution to handle the make -p output.
> > 
> > Appears that MAKAO is a full-fledged attempt at generating the DAGs
> > for a makefile. But for running your perl code we need the graphviz
> > utility also to be able to generate DAGs.
> 
>   http://www.win.tue.nl/~rp/bin/make2csv  # generates the CSV file
>   http://www.win.tue.nl/~rp/bin/csvtrans  # filters the CSV file
>   http://www.win.tue.nl/~rp/bin/csv2dot   # creates the GraphViz file
> 
> They require the CPAN module Text::CSV_XS.
> 
> Example of use:
> 
>   cd /tmp
>   wget http://ftp.gnu.org/gnu/make/make-4.0.tar.gz
>   tar xvf make-4.0.tar.gz
>   cd make-4.0/
>   ./configure
>   make -prR | make2csv | sort -u > make-prR.csv
> 
>   export DOT_A4='-Nshape=record -Ncolor=blue4 -Gnodesep=.15 -Gsize='7,10' 
> -Gratio=1 -Gcenter=1 -Grankdir=LR -Ecolor=green4 -Efontcolor=green4'
> 
>   csv2dot -b make-prR.csv | dot $DOT_A4 -Tpdf > make-prR.pdf
> 
> To my surprise, dot doesn't choke on this graph.
> But I usually filter the graph before feeding it to dot.
> That is what csvtrans is for, e.g.
> 
>   csvtrans -o rmarcs make-prR.csv | wc  # count the nodes (976)
>   csvtrans -o 'io>0' make-prR.csv | wc  # count the arcs (1364)
>   csvtrans -o 'out>0' make-prR.csv | dot $DOT_A4 -Tpdf > make-prR-w-deps.pdf
>     # omit all nodes without dependencies or recipes
> 
> MAKAO assumes you want to feed your graphs to Gephi (which can also
> read this format) and do your filtering within Gephi, which is probably
> a saner option: csvtrans is not so easy to use and it may contain bugs.
> 
> The same is true for make2csv; it's a quick hack and you may need
> to modify it before it does exactly what you want.
> 
> make2csv's analysis is static: it just lists rules found in the input.
> It doesn't expand variables and it doesn't do any inferencing.
> 
> MAKAO's analysis is dynamic: it instruments a run of make and produces
> the rule invocations executed.  Which means variables are expanded,
> inferences followed, unused targets and rules omitted.
> 
> So the resulting graphs will usually be very different, especially
> when variables, implicit rules, include, eval, etc. are used.
> 
> > Regards,
> > 
> > Rakesh
> 
> -- 
> Reinier Post
> http://www.win.tue.nl/~rp/
> 
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