Re: [Plplot-devel] Next release

[<jc...@fe...>]

On Friday 28 February 2003 15:09, Rafael Laboissiere wrote:
| * Jo=E3o Cardoso <jc...@fe...> [2003-02-28 14:36]:
| > hmm, I was thinking to put the new libraries object files into
| > libplplot, to easy the linking of users apps. But if we install
| > libnn and libcsa the user can use the libraries independently. What
| > do you think about this?
|
| I would prefer to generate separate shared libraries for nn and csa,
| if possible.  In this case, there will be separation both in the
| source tree and in the final result.

OK, but configure should be run only once, checking for Qhull, defining=20
a HAVE_QHULL in config.h, and them making csa and (conditionally) nn.=20
libnn and (conditionally) libcsa and (conditionally) libqhull must then=20
be added to the dependency libs of libplplot, the same that is done=20
with libfreetype(1).

Rafael, if you have time, could you setup things for this :-?
Then I only have to commit src/plgriddata.c, examples/c/x21c.c, and the=20
changes to nn/delauny.c (and the patch file itself).

In my sources, which I don't have at hand, I only use from the original=20
tarball the *.[ch] files plus README, where the license is (2).=20
triangle.* doesn't need (and shouldn't) be committed.

| A "bonus track", as you mention, is the fact that users can link
| separately with the libraries.  For that, I can imagine generating a
| Debian package called, say, plplot-nn-csa.
|
| An aside note: have you came across a "bug" in nnpi.c where hash.c is
| included instead of hash.h?

I don't have the sources at hand. Also, I worked with nn and csa=20
versions which are not the current ones.

Joao

(1)-Another point that I have not digged into is the float/double issue.=20
While Qhull can be compiled for both float or double (we can check for=20
this at configure time), nn and csa use doubles; one might have to=20
disable nn/csa if the user wants to compile plplot with floats.

(2)- Please take a look at the license. It looks a bit confusing for a=20
civilian.  When I ask Pavel (nn/csa author's) for a clarification, he=20
said:

>This licence does _not_ explicitely demand
>
><BEGIN excerpt from GPL>
>b) You must cause any work that you distribute or publish, that in=20
whole=20
>or in part contains or is derived from the Program or any part thereof,=20
>to be licensed as a whole at no charge to all third parties under the=20
>terms of this License.=20
><END>
>
>Therefore I would be happy if we quietly implied that "BOTH SOURCE AND=20
>OBJECT CODE ARE MADE FREELY AVAILABLE WITHOUT CHARGE"
>refers to the _modified_ code only, not the whole application it is=20
used
> in. I _think_ it should be legally safe to use this code in commercial
> applications as long as the modified code retains copyright and is=20
made
> public.