After doing some work on a new xcode project (started a new view-based cocoa touch app--but posting here because I figured this is more of an XCode question) I needed to add some preprocessor macros to my project. When I went to Project>Edit Project Settings, I found that all of the GCC 4.0 settings sections (e.g. "GCC 4.0 - Preprocessing", "GCC 4.0 - Warnings", etc.) are not listed. Any idea why I can see these settings in some projects and not others?