Compiling (building) PHP

I have a question about "Build your own PHP on Windows" at: https://wiki.php.net/internals/windows/stepbystepbuild Specifically, step 6 of "Setup the build directory" is unclear to me. I think I understand everything else but I have a couple of other things I want clarification of. I might not have followed the instructions properly but if I have then I also need help finding "buildconf". I assume this is not the appropriate mailing list for help with that, so I am not being very specific. What mailing list should I use?