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Re: 950207: tbl2cdf

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  • Subject: Re: 950207: tbl2cdf
  • Date: Tue, 07 Feb 1995 13:53:04 -0700
> Organization: Dept. of Oceanography, Dalhousie University
> Keywords: 199502071946.AA10756

Steven,

> > These messages indicate some sort of problem with the way you have
> > specified to gcc where to find the netCDF library, or problems with the
> > installation of that library (was it also built with gcc?).  If the `make
> > test' worked OK before you installed the netCDF library, you might check how
> > gcc was invoked to successfully link nctest.c to the netCDF library and
> > imitate that.

...

> But I still have the problem with tbl2cdf:
> 
> Skye$ gcc -ansi -o tbl2cdf -I/opt/netcdf/include -L/opt/netcdf/lib -lnetcdf 
> tbl2cdf.c
> [...]
> ld: Undefined symbol
>    _ncclose

I think this may just be the order of arguments to gcc.  Try the following
instead:

  gcc -ansi -o tbl2cdf -I/opt/netcdf/include tbl2cdf.c -L/opt/netcdf/lib 
-lnetcdf

If that doesn't work, I'm stumped.

> I also get similar results when I copy some c++ programs to test the 
> libraries:
> 
> Skye$ g++ -c -g -I/opt/netcdf/include  nctst.cc
> Skye$ g++ nctst.o -L/opt/netcdf/lib -lnetcdf -lnetcdf_c++ -o nctst
> ld: Undefined symbol
>    _ncclose
>    _ncdimdef

Here the order of libraries may be important, since the C++ library uses the
C library, the C library should probably be last, as in:

    g++ nctst.o -L/opt/netcdf/lib -lnetcdf_c++ -lnetcdf -o nctst

--Russ

______________________________________________________________________________

Russ Rew                                                UCAR Unidata Program
address@hidden                                          P.O. Box 3000
http://www.unidata.ucar.edu/                          Boulder, CO 80307-3000
______________________________________________________________________________