title: How to reference files with environment variables?
body: <p>I was wondering if someone manage to reference files (except headers or lib) with an environment variable in XCode (mine : v3.2.1) ?</p>
  
  <p>There are settings that specify search paths for headers (HEADER_SEARCH_PATHS), libs (LIBRARY_SEARCH_PATHS), and even Carbon Resource (REZ_SEARCH_PATH). But how can I reference other file types for resources to have more flexibility for the development environment setup?</p>
  
  <p>Ideally, I would like to include $(MY_RESOURCE)/myResourceFile.foo.</p>
  
  <p>A solution would be to force every developer to add the env var to Xcode Preferences->Source Trees. I would like to have exactly the same behavior but embedded in the .pbxproj.</p>
  
  <p>Another solution, more flexible, but less maintainable would be to create a group, add files. Close XCode, edit the pbxproj and change the path with the env var.</p>
  
  <p>Do someone have another simpler solution ?</p>