ld: mod, file was built for unsupported file format which is not the architecture being linked (x86_64)

[Lars Beuth]

Hi,

I am using gfortran 4.6.0 on Mac Snow Leopard 64-bit to compile some
Fortran code that I wrote. The module and object files are generated
but when linking the application ld gives the following error message:

ld: in xxxx.mod, file was build for unsupported file format which is
not the architecture being linked (x86_64)

I am using the flag -m64 for compilation, so I guess gfortran should
generate mod-files for 64-bit (?).

I would greatly appreciate your help with this question.

With kind regards

Lars