[zeromq-dev] Foreign library dependencies

[Pieter Hintjens]

Mato, was this policy documented somewhere? If so, where please. If not,
why not? We work by written contract not private agreement. Thanks.

-Pieter
On Feb 4, 2012 3:33 AM, "Martin Lucina" <martin at lucina.net> wrote:

> skaller at users.sourceforge.net said:
> > I also asked a question earlier that didn't seem to get answered: what
> is the
> > attitude introducing a dependence on a foreign library? (Source can be
> included
> > in zmq without licence issues). In this case, Judy, since that
> determines the overhead.
>
> I'd been meaning to answer this, but got swamped by all the other emails
> :-)
>
> The policy that we followed with Martin Sustrik while maintaining ZeroMQ
> was to avoid external dependencies where possible. Any external dependency
> creates a burden on users, distributors (Debian, etc.) and maintainers of
> the depending project.
>
> The major exception was OpenPGM, which got packaged with libzmq both
> because originally we used a specific version, and because a significant
> part of our target user base are people who want to use PGM multicast.
>
> A major part of software development (IMHO) is knowing what to keep "out"
> just as much as what to put "in". Keeping the libzmq core lean & mean
> follows this principle.
>
> Regarding Judy, I had a brief look at the website, and grabbed the code.
> The download is a ~1MB tarball, and a quick count of the "src" directory
> gives:
>
> $ find . -type f | xargs wc -l
> [...]
>  29314 total
>
> Doing the same for libzmq master gives:
>
>  20352 total
>
> So, if it were my decision, I would need to consider the benefit of Judy
> arrays vs. the cost of including 29000 lines of code (more than libzmq
> core!) as a dependency.
>
> Of course, there is no such policy now, so feel free to submit a patch!
>
> -mato
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>
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