[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

[netCDF #IPF-540532]: undefined symbol: __netcdf_MOD_nf90_open

This archive contains answers to questions sent to Unidata support through mid-2025. Note that the archive is no longer being updated. We provide the archive for reference; many of the answers presented here remain technically correct, even if somewhat outdated. For the most up-to-date information on the use of NSF Unidata software and data services, please consult the Software Documentation first.

  • Subject: [netCDF #IPF-540532]: undefined symbol: __netcdf_MOD_nf90_open
  • Date: Sat, 28 May 2011 08:57:22 -0600
Hi Ahmed,

> I am using netcdf 4.1.2 and i have compiled it with gfortran and i
> am trying to compile program which is using netcdf libraries
> 
> gfortran read_smart.f90 -L /usr/local/netcdf_412_gfortran/lib/ -lnetcdff
> -lnetcdf -I /usr/local/netcdf_412_gfortran/include/
> 
> but when i type a.out , i get the following error
> 
> a.out: symbol lookup error: a.out: undefined symbol: __netcdf_MOD_nf90_open
> 
> i have compile netcdf with the following option
> ./configure FC=gfortran CC=gcc  --prefix=/usr/local/netcdf_412_gfortran/
> --enable-shared ;
> and i do make check and all test is passed ok and i have attached it in the
> mail
> for me i don't what where is the error.

Move the gfortran include option to before the f90 file name, as in:

  gfortran -I /usr/local/netcdf_412_gfortran/include read_smart.f90 -L 
/usr/local/netcdf_412_gfortran/lib -lnetcdff -lnetcdf

so the compiler knows where to look for the netcdf.mod file referenced
in the f90 "use netcdf" statement in your read_smart.f90 program.

You can also use the "nc-config" command to see what Fortran flags are needed 
on your systems, as in

  nc-config --fflags

and 

  nc-config --flibs

where nc-config is a command installed in the netcdf bin/ directory, along with 
ncdump, ncgen, and nccopy 
utilities.

--Russ

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



Ticket Details
===================
Ticket ID: IPF-540532
Department: Support netCDF
Priority: Normal
Status: Closed