Problem with duplicate symbols when using gfortran 4.6 that are not present when using gfortran 4.5

[Steve Kargl]

On Fri, Nov 11, 2011 at 12:19:38PM +0100, Arjen Markus wrote:
> 
> the problem I am confronted with is a trifle complicated. It occurs in
> the PLplot project (http://plplot.sf.net).
> The thing is this:
> - The Fortran 95 examples in that project can be built without a
> problem, when using gfortran 4.5, but
>   when using gfortran 4.6, the linker complains about duplicate
> symbols, such as __gfortran_getarg_i4.
> - The FORTRAN 77 examples that are compiled and linked with either
> compiler version pose no such
>   problem.
> - Examining the various libraries and object files that are produced,
> it turns out that these symbol names
>   are present in one static and one dynamic library, thus causing the
> problem. (They are _not_
>   present in the object files that make that dynamic library, only in
> the one for the static library, as that
>   use iargc() and getarg (*))
> - The problem disappears when I use the option
> -Wl,--allow-multiple-define (the symbol names even disappear
>   from the DLL, if I am not mistaken)
> 
> I will try and concoct a small example, if there should be a need for
> that. My main goal is to be able
> to compile and link these examples _without_ any special options. I
> hope my decription is clear enough.
> 

Which platform(s)?

-- 
Steve