instructions for compiling VIM 7 on OS X?

[Peter Michaux]

Hi,

I have found some pre-built binaries for VIM 7 for Mac OS X but
nothing for how to build the binary so it lives in /usr/bin/vim. I
would like the executible to live there just like the VIM 6.2
executable that comes with OS X does now. This is a good idea isn't
it?

Any links for this?

Thanks,
Peter