Re: [Opengrads-devel] Building GrADS v2 with new supplibs: almost there

[Arlindo da S. <da...@al...>]

On Feb 1, 2008 4:22 AM, Patrice Dumas <per...@fr...> wrote:

> On Fri, Feb 01, 2008 at 02:24:05AM -0500, Arlindo da Silva wrote:
> >
> > Pat: can you check whether I captured all your dynamic supplib mods? In
> > particular, check m4/grib2.m4. The new HDF requirement may be
> particularly
> > challenging for you on Fedora as it requires a non-standard build of
> HDF-4
>
> No it won't be challenging since we already use --disable-netcdf... In
> fact it is sometime required to be able to link with hdf and netcdf
> together, first time it came in was for gdal (or grass), on Wed Feb  8
> 2006.
>

This is very encouraging.


> > (--disable-netcdf). Do you know who maintains HDF-4 on Fedora? If you
> cannot
>
> I comaintain HDF4 on fedora with Orion Poplawski.
>
> > have 2 versions of the HDF-4 library supported on fedora one solution
> may be
> > to drop NetCDF altogether as in the old days of v1.5 (or was it 1.6?
> Hoop
> > will remember) and let the standard HDF do the reading for both NetCDF
> and
> > HDF. Apparently HDF4.2r2 supports the NetCDF-3 API, if not I have a
> wrapper
> > library that could be useful.
>
> It supports the NetCDF-3 API but does it support the netcdf files?
>

HDF-4 have allways being able to read NetCDF files from Unidata, and of
course its own HDF-4 format. It only writes in HDF-4 format, though.  By
adding the NetCDF-3 API, I can't imagine they would drop support for reading
NetCDF files. BTW, NetCDF-2 and NetCDF-3 have different APIs but exactly the
same file format. NetCDF-4 adopts HDF-5 as its file format, but can still
read/write its previous NetCDF-2/3 format.


>
> Anyway there is support for both hdf4 builds with enable-dyn-supplibs
> (in hdf4.m4). If a build with sd_ appended (--disable-netcdf) is detected
> hdf2netcdf.h is included (to be seen in configure.ac).
>

This code fragment appears to be commented out in the configure.ac file. (I
was wondering what this was all about.) Am I correct to assume that if I
build HDF-4 with --disable-netcdf I should still be able to use the same
library to build v1.9? Have you ever tested it? If this is the case, I only
have to maintain one type of HDF-4 build in the supplibs.

  Thanks,

          Arlindo

-- 
Arlindo da Silva
da...@al...