Compiling 64 bit from 32 bit

[ccrum]

I've got an older program that needs to be updated to run on 64 bit machines. My verison of DVF is a bit old, 6.x if I remember right. I've got a couple of questions. First, can I compile in 64 bit from a 32 bit machine? Second, some of the static libs in the program were written by someone else and I no longer have access to the source code as he unfortunately passed away. Do these need to be recompiled in 64 bit before I can compile the whole program in 64 bit?

[Steven_L_Intel1]

DVF had no support for 64-bit. Intel Visual Fortran does, and you can build a 64-bit application on a 32-bit system using Intel Visual Fortran.

Yes, you must recompile all sources for 64-bit - you cannot mix 32-bit and 64-bit objects.