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

[Tobias Burnus <burnus at net-b dot de>]

Hello,

On 11/11/2011 12:19 PM, Arjen Markus wrote:
> - 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.

In principle, there was no change between 4.5 and 4.6 with regards to 
those symbols. Are you by chance mixing two differently compiled object 
files with either static libgfortran linking or using some fancy option 
like -mrtd?

You wrote elsewhere that you use equation.com's GCC compiler. I think 
you should consider trying another one. I don't have any experience with 
their compiler myself, but I know that equation.com's MinGW64 compiler 
crashes when compiling the polyhedron benchmark while a build from 
mingw64.sf.net does not.

> 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.

I think a small example would be great. (After you have checked that it 
is not due to the equation.com issue.) Additionally, it would be helpful 
to know whether there are multiple versions of GCC installed and which 
(compile and) link options do you use. Do you create first a library 
(static? DLL?) and then link it? Or do simply link simple .o files 
consisting of the "library" and the test program?

Tobias