I have been building LiDIA regularly over the years but not in the
last few months so (in particular) not with the latest gcc.  I have
remained on the LiDIA mailing list though (which has been extremely
quiet for a long time) and know that people have been putting in the
patches necessary to make it build with current gcc.  I'll look those
up and report back.

About GPL-ing LiDIA, I will ask too since I was at one time listed as
a member of the LiDIA group, and know Buchmann reasonably well,
they/he might be cooperative!

John

On 9/4/07, Bill Hart <[EMAIL PROTECTED]> wrote:
>
> I looked at the LiDIA list. Christoff continues to promise the new
> version is coming, this time before he goes on vacation.
>
> Apparently the compile problems are to do with the new gcc. Some kind
> person has posted the changes they made to get it working at length on
> the LiDIA list.
>
> I'll see if I can get it going and post timings for that too. I
> anticipate that all the different layers in LiDIA will make the class
> number code quite slow despite the algorithm being quite good. I will
> eventually code it from scratch myself, since this problem interests
> me greatly and fits in well with the quadratic sieve I've been
> writing. But obviously that's not going to happen overnight.
>
> Bill.
>
> On 3 Sep, 22:00, "William Stein" <[EMAIL PROTECTED]> wrote:
> > On 9/3/07, Bill Hart <[EMAIL PROTECTED]> wrote:
> >
> >
> >
> > > I tried to build LiDIA so I could do some timings. But it just doesn't
> > > build. It's a standard Opteron machine with G++ and GMP on it. I'm
> > > just doing a standard build, but it complains in ring_matrix.h that
> > > some function is missing.
> >
> > The last time I built LiDIA was maybe 1999, and it wasn't too hard, though
> > it took a long time. Justin Walker used to also frequently build LiDIA back
> > then.
> >
> > One issue with LiDIA is that I think -- and correct me if I'm wrong -- that
> > it still officially has a non-GPL compatible license.  There was a mailing
> > list post from somebody several months ago that they
> > would GPL LiDIA, but I don't know if that person actually owned the 
> > copyright,
> > or if the university would allow it, or if anything actually came of it.
> > If not, it would be great is somebody who remembers could track this
> > down or email again to bug them.
> >
> > Having some benchmarks comparing PARI and Magma will be really useful.
> > But for now I'm mainly worried about even having some part of the
> > *functionality*
> > of Magma in algebraic number theory, since presently we are even way way
> > behind there.
> >
> > --
> > William Stein
> > Associate Professor of Mathematics
> > University of Washingtonhttp://www.williamstein.org
>
>
> >
>


-- 
John Cremona

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