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Re: 20040228: netCDF Fortran (77 + 90) - linux - How to read NetCDF and HDF files in one Fortran code?

>To: address@hidden
>From: "Krzysztof Markowicz" <address@hidden>
>Subject: netCDF Fortran (77 + 90) - linux - How to read NetCDF and HDF files 
>in one Fortran code?
>Organization: Warsaw Uniwersity
>Keywords: 200402281720.i1SHKvqL014997 netCDF HDF

Hi Krzysztof,

> I've written code which read NetCDF files but also HDF in fortran pgf90.
> I use 3.5.1 NetCDF and 5.1 HDF .
> 
> Unfortunatelly during complilation I have errors due to mix NetCDF
> and HDF library.  
> When I run separatelly rutines which read NetCDF and HDF files
> everytjhing works fine. 
> 
> Could you tell is it possible to fixed this problem. I spend a lot
> of time on my code but when I try build main program this problems
> appeared. 
 ...
> pgf90 -O0   readhdf.o  -I/usr/local/include -L/usr/local/lib -lmfhdf -ldf 
> -ljpeg -lz -lnetcdf aerosol_kmark.o readnogaps.o readnaaps.o albedo_emiss.o 
> timesub.o -o readhdf
> /usr/local/lib/libnetcdf.a(attr.o): In function `NC_findattr':
> attr.o(.text+0x388): multiple definition of `NC_findattr'
> /usr/local/lib/libmfhdf.a(attr.o)(.text+0x0): first defined here
> /usr/bin/ld: Warning: size of symbol `NC_findattr' changed from 105 to 131 in 
> attr.o
> /usr/local/lib/libnetcdf.a(nc.o): In function `NC_check_id':
> nc.o(.text+0x6c): multiple definition of `NC_check_id'
> /usr/local/lib/libmfhdf.a(file.o)(.text+0x1204): first defined here
> /usr/bin/ld: Warning: size of symbol `NC_check_id' changed from 57 to 60 in 
> nc.o
> /usr/local/lib/libnetcdf.a(var.o): In function `NC_var_shape':
> var.o(.text+0x4f8): multiple definition of `NC_var_shape'
> /usr/local/lib/libmfhdf.a(var.o)(.text+0x0): first defined here
> /usr/bin/ld: Warning: size of symbol `NC_var_shape' changed from 483 to 267 
> in var.o
> make: *** [readhdf] Error 2

I think you should not include "-lmfhdf" in the flags for pgf90.  That
library is for HDF4, not HDF5, and provides an emulation of the netCDF
API in terms of HDF4 functions.  If you omit that library, the
duplicate definitions should go away.

--Russ

_____________________________________________________________________

Russ Rew                                         UCAR Unidata Program
address@hidden          http://www.unidata.ucar.edu/staff/russ