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[netCDF #NWL-557256]: fortran and netcdf.4.1.3.b1 compilation issues with netcdf library

> Hi,
> 
> I am new to compiling fortran codes with netcdf, I have been trying to
> run a fortran 90 code that makes use of netcdf to create a .nc file.For
> it I use the following command to first create an object file
> 
> ifort -c 
> -I/glade/proj2/fis/contrib/pwr5.aix-5/netcdf/deprecated/netcdf-4.1.3b1_seq/include
> prog.f90
> 
> which runs fine and creates a prog.o, then I try creating an executable
> file by using the following command,
> 
> ifort -o prog.x prog.o 
> -L/glade/proj2/fis/contrib/pwr5.aix-5/netcdf/deprecated/netcdf-4.1.3b1_seq/lib
>  -lnetcdff
> 
> and I have also tried using -lnetcdf after -lnetcdff, but I keep getting
> the following message:
> 
> /glade/proj2/fis/contrib/pwr5.aix-5/netcdf/deprecated/netcdf-4.1.3b1_seq/lib/libnetcdff.a:
> file not recognized: File format not recognized
> 
> I am not sure how to figure out what exactly to change. May I kindly
> ask for some help,

It's possible that the netCDF Fortran library was not built with the ifort 
Fortran compiler.  If that's the problem, you will either have to use the
same Fortran compiler as was used in building the netCDF Fortran library, or
rebuild the netCDF library using ifort and icc and install the library again.

Another possibility is that the libnetcdff.a library is for a different 
architecture
than the platform on which you're running.  To see if this is the problem, 
you'll 
need tp use the "ar" command to extract an object file from libnetcdff.a, as in:

  ar x 
/glade/proj2/fis/contrib/pwr5.aix-5/netcdf/deprecated/netcdf-4.1.3b1_seq/lib/libnetcdff.a
 nf_dim.o

then use the "file" command on the extracted object file to see whether it was 
built for a 32-bit architecture or a 64-bit architecture:

  file nf_dim.o

Then run file on your prog.o, to see if it's for the same architecture.  If they
don't match, you'll either have to rebuild netCDF for the machine on which 
you're
running, or use the right ifort flags (such as -m32 or -m64) to match the
architecture of the library.

--Russ

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



Ticket Details
===================
Ticket ID: NWL-557256
Department: Support netCDF
Priority: Normal
Status: Closed