title: Can you set architecture specific Build Settings in an .xcconfig file in Xcode 4.3?
body: <p>I want to set Build Settings that are specific to each architecture (armv6 vs armv7). This is easy enough to do in the Xcode GUI, but I try to put all project configuration in .xcconfig files. Is it possible to replicate the following configuration (Thumb enabled for armv7, but not armv6 architectures) using .xcconfig files?</p>
  
  <p><img src="https://i.stack.imgur.com/GKe3p.png" alt="GCC_THUMB_SUPPORT Settings in Xcode"></p>