Where is the "Build Active Architecture Only" flag in Xcode 4.5.1?

Question

I'm sorry because it's not really a strictly programming question but I'm going crazy and google is not being friendly in this.

Can someone explain to me like I'm five where I can set that flag for Release?

Thanks

Answer 1

In Project Navigator (Command+1) select your project.
The Editor will now show your project settings.

The Build Active Architecture Only setting is available on Project level in the Architectures section (filter for e.g. 'arch', for best results select All instead of the Basic option selected in the screenshot).

The setting can be adjusted individually for the Debug and Release targets.