Re: [Opengrads-devel] dynamic supplibs checking

[Jennifer A. <jm...@co...>]

A fully-features OPeNDAP-enabled GrADS needs two things: libnc-dap  
and libgadap. The station data interface is not so widely used as  
gridded data, but it is still extremely important.

By the way, please look at ftp://grads.iges.org/grads/Supplibs/2.0/ 
src/gadap-2.0.tar.gz and let me know if I got everything right. I  
have changed the copyright, build scripts, m4 macros, version number,  
etc.

Jennifer


On Aug 1, 2008, at 12:45 PM, Arlindo da Silva wrote:

> On Fri, Aug 1, 2008 at 12:08 PM, Patrice Dumas <per...@fr...>  
> wrote:
>> On Fri, Aug 01, 2008 at 11:44:15AM -0400, Jennifer Adams wrote:
>>> Very persuasive. I guess it depends a lot on which libraries we're
>>> talking about. It's not fair to lump HDF into the same category  
>>> as DODS,
>>> which is far more aggravating to support. But if you have an old  
>>> box with
>>> gcc 2.95, you just can't have an opendap-enabled build of GrADS 2.0.
>>
>
> Or even for v1.9; in going to the new libdap there have been API level
> changes that make it impossible to build against an old libdods. Being
> able to use an old libgadods with gcc-2.95 is just too much trouble
> and in my judgement, not worth it.
>
>> Indeed, but gcc 2.95 is very very old. With anything above you can
>> certainly (maybe with some stl implementation). Besides, grads  
>> doesn't
>> link against libdap, but against libncdap which has a far better  
>> binary
>> stability. and we can imagine that the binary compatibility will  
>> never
>> break, so this gives room for backward compatibility at the source  
>> level.
>>
>
> Except for the size of the binary, gradsdap appears just as stable as
> "grads" built with the vanilla netcdf. Do you have any evidence that
> it adds any performance penalty besides the start up time?
>
> Perhaps we could take a bold step: build just one grads which is
> nc-dap enabled; and have "gradsnc" built as an option for those who
> need it. One could certainly try it out and see if the users can live
> with a single grads.  My guess is that it would work just fine. So,
> you just add a single switch
>
> --with-nc-dap         (default)
> --without-nc-dap
>
> This would really simplify the build...
>
>
>          Arlindo
>
>
>
>
> -- 
> Arlindo da Silva
> da...@al...
>
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--
Jennifer M. Adams
IGES/COLA
4041 Powder Mill Road, Suite 302
Calverton, MD 20705
jm...@co...