How to fix the undefined reference errors

Asked By chase calderon 20 points N/A Posted on - 01/12/2012

Please help me fix the error ‘un defined reference to f – xargc’. Also the underscore problem is to be solved. How can I say the linker for ignoring the unresolved reference? The MKL with PGI compiler can be used and if can be used how can it be used?

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Answered By Lee Seen 0 points N/A #100507

How to fix the undefined reference errors

 

The following are the solutions for the problem above:

 

First, you can choose to add a C function that will be used to define and also assignsxarg & xargc and it will also add a call to the C function from the fortran main program. See example below:

 

        zarg.c:

        int    xargc;

        char **xargv;

        extern int    __argc_save;

        extern char **__argv_save;

        void zarg_() 

       {          

            /* call zarg() from fortran */

            xargc = __argc_save;

            xargv = __argv_save;

        }

The second workaround will be to recompile the file farg.f with 'pgf77 -c' and thereafter you will add the object to the link before -lmpich. In case the second underscore is needed especially for the global names, then you will need tor to include the second underscore option. Here is the source for farg.f:

 

   integer function mpir_iargc()

      mpir_iargc = iargc()

      return

      end

      subroutine mpir_getarg( i, s )

      integer       i

      character*(*) s

      call getarg(i,s)

      return

      end 

 

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• Posted on - 01/13/2012
• Question Category: OS