How to update Xcode to install "UNIX Development Support"?

xcode macos unix xcode3.2

With Xcode 4.3 (from Apple App Store) you can enable Unix Command Line Tools via the Xcode Menu: Preferences -> Download -> Components

xcode macos unix xcode3.2

In xcode > 4.5 select Preferences -> Download -> Components -> Command Line Tools

xcode macos unix xcode3.2

Finally.

I had to download from Apple's website the latest version of Xcode 3 (3.2) along with the iPhone SDK that I won't use in the near feature.

This time the "UNIX Development Support" was enabled:

Xcode 3.2 Installation

So now I can compile from the command line!

CodeHunter