Re: Diagramming a makefile?

[Tim Murphy]

Check slide 24 for an example of what you will get:

http://events.linuxfoundation.org/images/stories/slides/abs2013_melski.pdf?a

Regards,

Tim

On 14 April 2014 11:14, Reinier Post <address@hidden> wrote:
> On Sun Apr 13 22:44:58 2014, address@hidden (Rakesh Sharma) wrote:
>> Hello GNU makers,
>>
>> Is there any tool/utility which can diagram the DAG of the
>> rules/targets by going thru the makefile? And I don't mean this in
>> a generic way, that all sorts of complex $(eval-ed) rules need to
>> be diagrammed.
>
> MAKAO:
>
>   http://mcis.polymtl.ca/~bram/makao/
>
> I haven't used it in a while, but there is a recent release.
>
> I have a simple Perl script that takes make -p output
> and outputs it in a CSV format that I can filter or convert
> to Graphviz format with other scripts.
>
>   http://www.win.tue.nl/~rp/bin/make2csv
>
> It doesn't do a perfect job, and other Perl scripts exist with
> the same purpose.  However, all of these attempts appear incomplete.
> No doubt there are efforts in other languages, too.
>
> It would be helpful to have an official, exact description
> of makefile syntax, telling exactly how to parse make -p's output,
> where to find the targets, dependencies, and recipes,
> and what differences exist between versions.
> The source code is the ultimate specification, of course,
> and the info files more or less contain the information,
> but it would be nice to have it isolated in a single place.
>
>> What I feel is that if we have a picture of the DAG of a makefile,
>> then we can better understand the behavior of make.  And vice versa
>> too, we can start off writing a makefile by drawing the DAG first &
>> then convert that into a makefile (the rules portion).
>>
>> Considering that make is nearing 4 decades, it's hard to believe
>> that such utilities are not already available.
>
> Some are, but it's hard for them to guarantee 100% accuracy
> (leaving aside the issue of dynamic rule generation),
> as makefile syntax may slightly change from version to version.
>
>> Thanks, Rakesh
>
> --
> Reinier Post
> TU Eindhoven
>
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> address@hidden
> https://lists.gnu.org/mailman/listinfo/help-make



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