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Re: Problems with linking the netCDF library on an SGI R5000

Rasmus,

>Date: Fri, 05 Jun 1998 12:36:34 +0000
>From: "Rasmus E. Benestad" <address@hidden>
>Organization: Det Norske Meteorologiske Institutt
>To: address@hidden
>Subject: Problems with linking the netCDF library on an SGI R5000 
>Keywords: 199806051238.GAA04999

In the above message, you wrote:

> I apologise for taking your time. I have tried for some time to install
> netCDF on my SGI 02 work station, but I have some problems getting the
> libraries to work. The installation seems to complete, and ncdump and
> ncgen work. The problems arise when I try to use the netCDF libraries
> when compiling C codes for reading or writing netCDF files. I tried a
> simple C program generated by using ncdump data.nc > foo.cdl; ncgen -c
> foo.cdl > foo.c. 
> 
> The errors that I get are:
> 
> saragasso 53% make foo
>         cc -ansi -g -mips3 -o foo -I//usr/people/kareb/local/include
> -L//usr/people/kareb/local/lib foo.c
> ld32: ERROR 33: Unresolved text symbol "nc_strerror" -- 1st referenced
> by foo.o.
> ld32: ERROR 33: Unresolved text symbol "nc_create" -- 1st referenced by
> foo.o.
> ld32: ERROR 33: Unresolved text symbol "nc_def_dim" -- 1st referenced by
> foo.o.
> ld32: ERROR 33: Unresolved text symbol "nc_def_var" -- 1st referenced by
> foo.o.
> ld32: ERROR 33: Unresolved text symbol "nc_put_att_text" -- 1st
> referenced by foo.o.
> ld32: ERROR 33: Unresolved text symbol "nc_put_att_float" -- 1st
> referenced by foo.o.
> ld32: ERROR 33: Unresolved text symbol "nc_put_att_short" -- 1st
> referenced by foo.o.
> ld32: ERROR 33: Unresolved text symbol "nc_enddef" -- 1st referenced by
> foo.o.
> ld32: ERROR 33: Unresolved text symbol "nc_put_var_float" -- 1st
> referenced by foo.o.
> ld32: ERROR 33: Unresolved text symbol "nc_put_var_short" -- 1st
> referenced by foo.o.
> ld32: ERROR 33: Unresolved text symbol "nc_close" -- 1st referenced by
> foo.o.
> ld32: INFO 152: Output file removed because of error.
> *** Error code 2 (bu21)
...

The above error messages indicates that the linker could not resolve
references to netCDF functions.  This is consistent with the fact
that the above compile-and-link command does not reference the netCDF
library.

You must add a reference to the netCDF library to your compile-and-link
command, for example

    cc -ansi -g -mips3 -o foo -I/usr/people/kareb/local/include \
        -L/usr/people/kareb/local/lib -lnetcdf foo.c

> 
> The lines in my Make file are:
> 
> CC = cc
> NCDF=-I/$(HOME)/local/include -L/$(HOME)/local/lib -lnetcdf
> .
> .
> foo: foo.c
>       $(CC) -ansi -g -mips3 -o foo $(NCDF) foo.c

From the above, it would appear that the make(1) command should have
contained a reference to the netCDF library.  Yet we know from the
output that it did not.  It appears that your make(1) utility is broken.

Try compiling-and-linking the file manually to investigate the problem.
If you succeed manually but make(1) refuses to add the netCDF library
reference, then inform your system administrator of the problem.

> 
> I had a similar problem when using the HDF (4.3) library, but managed
> still to get the code to compile if I used the -u flag. This trick,
> however, didn't work for the netCDF library. Do you have any idea of
> what I'm doing wrong? Are the libraries not properly installed, or is it
> that I do something wrong when compiling/linking foo.c? Could it be that
> ncgen is not working properly?
>  
> Yours sincerely Rasmus Benestad
> address@hidden

Please let me know if this helps.

--------
Steve Emmerson   <http://www.unidata.ucar.edu>