Brief instructions for taking a new OS X build and adding just enough development tools.
Install homebrew, a package manager.
/usr/bin/ruby -e "$(/usr/bin/curl -fsSL https://raw.github.com/mxcl/homebrew/master/Library/Contributions/install_homebrew.rb)"
Update the brew catalogue and install a few likely needed tools, including the compiler toolchain.
brew update
brew install autoconf automake wget git