Re: [netcdfgroup] Determining format options available in netcdf library

• To: "Russ Rew" <russ@xxxxxxxxxxxxxxxx>
• Subject: Re: [netcdfgroup] Determining format options available in netcdf library
• From: "Gregory Sjaardema" <gdsjaar@xxxxxxxxxx>
• Date: Tue, 6 Sep 2011 09:47:45 -0600

On 9/6/11 9:38 AM, Russ Rew wrote:

Is there a way for an application linked to a netcdf library to
determine whether the netcdf-4 capabilities are present in the library?

Yes, but it's not exactly elegant :-)

#include<netcdf.h>

/* Returns 1 if linked to library with netCDF-4 features enabled, otherwise 0 */
int
is_netcdf4(void) {
     int ncid;
     int stat = nc_create("/tmp/tmp.nc", NC_NETCDF4,&ncid);
     if(stat == NC_ENOTNC)
        return 0;
     return 1;
}

I have an application that I want to normally write a classic netcdf-3
file, but if the netcdf library was compiled with the netcdf-4 option
enabled, it should create a netcdf-4 file.  It looks like the netcdf.h
file is the same for both options and I don't see any api function that
would give the information.

We'll consider adding such a function in addition to the current
nc_inq_libvers() function that returns a string for which version of the
library source was used to build the library, but doesn't specify with
which features the library was built.

--Russ

Thanks, that sounds like a good idea...

--Greg

• Follow-Ups:
  • Re: [netcdfgroup] Determining format options available in netcdf library
    • From: Ed Hartnett

• References:
  • [netcdfgroup] Determining format options available in netcdf library
    • From: Gregory Sjaardema
  • Re: [netcdfgroup] Determining format options available in netcdf library
    • From: Russ Rew