__gfortran_copy_string

[Tim Prince]

John Nelson wrote:
> I am trying to link a couple of simple c programs and a fortran 
> wrapper (HBOOKwrap.F) with the CERN library.
>
> gfortran compile option:   -ffixed-line-length-0
>
> Link line:
>
> gfortran -o Trg2ntp Trg2ntp.o getEv.o HBOOKwrap.o -L/cern/2005/lib 
> -lpacklib
>
> and I get an error:
>
> /usr/bin/ld: Undefined symbols:
> __gfortran_copy_string
>
>
> Google on gfortran_copy_string shows that others have had problems 
> with this and
> cannot find where this piece of code is located.
>
> gfortran was downloaded yesterday (23 June 2007) to MacOSX 10.4.10 on 
> PowerPC G4.
>
> gcc is latest installation from XCode 2.4.1
>
> A hex dump of HBOOKwrap.o shows that gfortran_copy_string is not in 
> its symbol table.
>
> A hex dump of /usr/local/gfortran/libgfortran3.dylib shows that it 
> does not contain this symbol.
> It is not present in libgfortran.a either.
>
> I am missing something, or have an incorrect gfortran library, or ??
>
Your error message should have said where the undefined reference came 
from.  The Google references appear to refer to a disrecommended old 
version of gfortran.  Your reference to /cern/2005/  tends to reinforce 
this suspicion, as there was no satisfactory gfortran that long ago.You 
will probably not be able to use a library which was built with a 
different major version of gfortran than the one you installed.  More 
helpful than claiming "latest version from XCode" would be to tell what 
you get from gfortran -v.  But, you probably could solve the problem by 
rebuilding CERN libraries with the same version of gcc, if that is not 
what you did.