RE: undefined reference using netcdf library

• To: "'Jeff Whitaker'" <jswhit@xxxxxxxxxxx>
• Subject: RE: undefined reference using netcdf library
• From: "Yair Suari" <yairsuari@xxxxxxxxx>
• Date: Sun, 4 Feb 2007 06:20:44 -0800

Jeff thanks again for your help
I now understand which one is the netcdf library and therefore successfully
compile using netcdf.

-----Original Message-----
From: Jeff Whitaker [mailto:jswhit@xxxxxxxxxxx] 
Sent: Friday, February 02, 2007 7:39 AM
To: Yair suari
Cc: netcdfgroup@xxxxxxxxxxxxxxxx
Subject: Re: undefined reference using netcdf library

Yair suari wrote:
> i dont think its finding the library but when i look at the netcdf.a  
> (using nm command) i can see the functions which could not be found.
> during my googling i found two things related to such problems one has 
> something to do with added underscore to function names during 
> compilation and the other with the -i switch but i could stil not 
> solve the problem.
> thanks alot for your help
> yair
>
> On 2/2/07, *Jeff Whitaker* <jswhit@xxxxxxxxxxx 
> <mailto:jswhit@xxxxxxxxxxx>> wrote:
>
>     Yair Suari wrote:
>     > Jeff thanks for your help
>     > I tried to link the compiler to the netcdf.mod file but it did
>     not help
>     > (before I had a link to that file in the compiling folder)
>     > The massages I get are not from not seeing netcdf.mod
>     > I did see people use the -I switch but did not understand where
>     do they
>     > point it to.
>     > Thanks again
>     > yair
>     >
>     > -----Original Message-----
>     > From: Jeff Whitaker [mailto: jswhit@xxxxxxxxxxx
>     <mailto:jswhit@xxxxxxxxxxx>]
>     > Sent: Thursday, February 01, 2007 5:47 AM
>     > To: Yair suari
>     > Cc: netcdfgroup@xxxxxxxxxxxxxxxx
>     <mailto:netcdfgroup@xxxxxxxxxxxxxxxx>
>     > Subject: Re: undefined reference using netcdf library
>     >
>     > Yair suari wrote:
>     >
>     >> i an a new user to netcdf,unix,fortran so this will probably be
>     easy
>     >> to most of you but i cant get to start using the netcdf interface.
>     >> when trying to compile i get the following massages:
>     >>
>     >> yair@yairsuari:~/fortran/cdfdata$ ifort create.f90 -g -o create.o
>     >> /tmp/ifortmAdSAz.o: In function
>     >> `cdfcreate':/home/yair/fortran/cdfdata/create.f90:5: undefined
>     >> reference to `netcdf_mp_nf90_create_'
>     >> /tmp/ifortmAdSAz.o: In function
>     >> `handle_err':/home/yair/fortran/cdfdata/create.f90:12: undefined
>     >> reference to `netcdf_mp_nf90_strerror_'
>     >>
>     >> i am using ubuntu (debian based linux) on x86 machine and intel
>     >> fortran compiler 9.1
>     >>
>     >> when googling around for this i saw a similar problem created when
>     >> using a different compiler for your programs and for the netcdf
>     >> compilation but this is not the case, i have always used intel.
>     >>
>     >> please HELP
>     >> yair
>     >>
>     >> --
>     >> Yair Suari
>     >> Hamafteach 23 Michmoret Israel 40297
>     >> Phone-0528-524520, 09-8664245
>     >>
>     >
>     > Yair:  You need to use pass ifort (or any fortran compiler) the
>     location
>     > of 'netcdf.mod', via '-I/path/to/module' and the library via
>     > '-L/path/to/netcdf/library -lnetcdf'.
>     >
>     > -Jeff
>     >
>     >
>
>     Yair:  What about the -L flag?  It must not be finding the library
>     then.
>
>     -Jeff
>

Yair:  Are you telling the linker where to find the library?  For 
example, if the lib is in /usr/local/lib, you need to use
'-L/usr/local/lib -lnetcdf' when linking.

-Jeff

-- 
Jeffrey S. Whitaker         Phone  : (303)497-6313
Meteorologist               FAX    : (303)497-6449
NOAA/OAR/PSD  R/PSD1        Email  : Jeffrey.S.Whitaker@xxxxxxxx
325 Broadway                Office : Skaggs Research Cntr 1D-124
Boulder, CO, USA 80303-3328 Web    : http://tinyurl.com/5telg

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• References:
  • Re: undefined reference using netcdf library
    • From: Jeff Whitaker