[Dune] Boost Dependency on DUNE

[Jayesh Badwaik]

ohk!!! thanks for the explanation.... ya i understand what you mean to
say.......
and i can relate to it...... thanks a lot........ just wanted to be clear of
whether it was only the
software installation issue or was there something deeper...

its all clear now.. thanks...

Cheers and Regards
Jayesh Vinay Badwaik
Electronics and Communication Engineering
VNIT, Nagpur
INDIA

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"We are servants rather than masters in mathematics" -- Charles Hermite



On Tue, Aug 2, 2011 at 12:06 AM, Jö Fahlke <jorrit at jorrit.de> wrote:

> Am Mon,  1. Aug 2011, 20:46:52 +0530 schrieb Jayesh Badwaik:
> > I am developing a module for some work and I have come to the conclusion
> > that a boost:ublas library would be really helpful
> > for my work. Especially, the Matrix
> > Library<
> http://www.boost.org/doc/libs/1_47_0/libs/numeric/ublas/doc/matrix_expression.htm#matrix_vector_operations
> >.
> > However, as I have gathered from the discussion, boost is not preferred
> as a
> > dependency in
> > DUNE core modules. And hence I am curious as to what are the reasons for
> it?
> > Are there any specific reasons?
>
> OK, I think that needs to be clarified a little.
>
> What we are trying to avoid is that any of the core modules has a hard
> dependency on external libraries.  The reason is that software
> installations
> on really big supercomputers tend to be very old.  Often the software is
> installed at the same time the supercomputer is build and essentially never
> updated[1].  There is a good chance that there is no (recent enough)
> version
> of Boost installed.
>
> If we introduce a hard dependency on Boost in one of the core modules, Dune
> will not work without Boost present.  Every Dune user is forced to install
> Boost first if it is not present on the computer he want to run his
> computations on.
>
> But don't despair -- even without a dependency on Boost, you can still use
> Dune and Boost together perfectly.  The difference is that we don't force
> you
> to do so.
>
> The topic of the discussion you're refering to was (among other things)
> whether our strict "no dependency on external libraries"-policy is still
> worth
> the work it means for us developers.  There is probably no final conclusion
> to
> this discussion, it will probably come up again some time in the future,
> and
> we may then decide that some external library makes life so much easier for
> us
> developers that it is worth the burden it puts on Dune's users.  But when
> this
> happens or whether that happens at all I cannot predict.
>
> Bye,
> Jö.
>
> [1] The reasons for that are manyfold.  Often the software installation on
> a
>    supercomputer is very special and updating the software may require
>    coorperation from the manufacturer.  Supercomputers are used by a lot of
>    poeple and downtime can cost a lot; updating software or even installing
>    new software always brings the risk that something goes wrong.
>
> --
> Warum die Sonne verboten werden sollte: http://www.bastiat.de unter
> "Petition".
>
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