How to add preprocessor define globally for “Debug” configuration in XCode 4

Question

Greetings, There are a lot of such questions on stackoverflow, but all of them about xcode version < 4, so I asking once more time:

How add preprocessor define gl

Answer 1

Select project in file browser, go to "build settings" and search for "preprocessor macros". Also .pch file is for global includes as well as global defines.