[Numpy-discussion] C-compiler options

Hi: I'm trying to build numpy with python27, 64-bit, on OSX 10.5.8. When I run python setup.py build, only 32-bit binaries get built. I can see what is happening is that not 64-bit flags are getting passed to the c compiler (I don't know about the fortran compiler. So I have two questions; 1) Shouldn't the system be determining that 64-bit nature automatically? I've used the same build process on the same machine (in what I thought were identical situations, apparently not) a number of times in the past, and it has always built correctly as 64 bit. I never needed to set compiler options. 2) How do I set C compiler options for the numpy build process? thanks, Dan