Shared object error

Hello NCL-talkers,

I was wondering if you may be able to provide some assistance with an issue
I am having when trying to load a shared object into NCL.

I have a Fortran 77 subroutine, which appears to compile just fine with
various WRAPIT commands (eg the default WRAPIT, and with the -fPIC and -m64
options). However, when I load the .so into NCL I receive the following
error:

 Copyright (C) 1995-2013 - All Rights Reserved
 University Corporation for Atmospheric Research
 NCAR Command Language Version 6.1.2
 The use of this software is governed by a License Agreement.
 See http://www.ncl.ucar.edu/ for more details.
warning:An error occurred loading the external file ./sub.lines.so, file
not loaded
./sub.lines.so: undefined symbol: ln_

Note this is the second .so I am loading in this script, the first suffers
no such issues. I have attempted to locate the "ln_" on my system but only
get the following:

/usr/local/MATLAB/R2013a/help/econ/exact_soln_minus_euler_approx.png

I am guessing this is not what I am looking for. I have run through the
troubleshooting tips associated with both WRAPIT and with loading shared
objects, but have found no solutions. The only thing I have come up against
(and here I may well be applying this technique completely inappropriately)
occurred when I attempted to use "wrapit77", following this example
http://www.ncl.ucar.edu/Document/Manuals/Ref_Manual/NclExtend.shtml#wrapit77.
When I ran
*wrapit77* < wrapper_input >! wrapper_W.c (using my .f file as the
wrapper_input, with appropriate wrapper text), all I ended up with was a
file named "!", so no .c was created, but no error was shown.

Consequently I am a little at a loss, although I am sure I may have made a
simple error somewhere. Note I have also tried creating the shared object
by putting the wrapper text into a separate .stub file. This method creates
the .so just fine, but I get the same undefined symbol error as before when
attempting to run the NCL script.

Any suggestions would be very welcome.

Thanks,
Kay

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Received on Wed May 28 17:38:22 2014