Ewan Mac Mahon <ewan <at> macmahon.me.uk> writes:
With the possible exception of the kernel, that's unlikely to work at all since a 32 bit system won't have 64 bit libraries installed to link against.
And Fedora's 32-bit GCC builds don't support -m64 at all. (The reason being that supporting -m64 in a 32-bit GCC slows down GCC significantly for everyone, even when building 32-bit stuff. So it's better to use a separate cross-compiler. Or just to run a 64-bit system.)
Kevin Kofler