I\'ve installed xCode 4 last night and tried to compile a software which should support 10.5 and above OSs.
It gave the error message \"Base SDK missing\". I found t
You can copy it from another Xcode installation into the /YourDeveloperFolder/SDKs/... but Xcode 4 still will not build Universal (Intel/PPC) binaries, essentially making it all but pointless to use the 10.5 SDK (except for "this method doesn't exist yet" style warnings). The official word from Apple (via their devforums): If you need 10.5/PPC support, stick with Xcode 3.