Hi, I'm following the instructions for building Boost, as far as I know correctly. When I run 'b2 python link=shared', I get link errors for symbols in the Python interpreter. The problem is that when I build the object files, it is using the 32-bit architecture, whereas my Python is the 64-bit architecture. I haven't found where the magic switch is in the build that tells it to build a 64-bit program. Can you help me with this? Thanks. Michael Rolle