[Coin-ipopt] Can you make a completely open source build?

[Carl Damon Laird]

As it stands right now, there is no tested, open source substitution for 
the Harwell routines. We are looking at some open linear solvers, but we 
do not have anything ready for prime time as yet. As I understand, the 
Harwell routines are free for "research" purposes - please consult the 
Harwell website for a more precise definition.

Of course, we agree that there *should* be a way to build IPOPT completely 
from open source, however, this is not a trivial task. The IPOPT algorithm 
requires a sparse, indefinite linear solver (symmetric) that can provide 
the inertia of the linear system (the number of positive and negative 
eigenvalues). So far, we have found VERY few open source linear solvers 
that can provide this functionality.

If anyone on the list has knowledge of some alternatives that we could 
consider, please let us know :)

Cheers,

Carl.

On Tue, 5 Jul 2005 kevin.c.furman at exxonmobil.com wrote:

> Are there any libraries that can be substituted for the Harwell routines?
>
> Is there a way to build IPOPT completely from open source?  If not,
> shouldn't there be one?
>
> Regards,
>
> Kevin Furman
>
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