I have installed both Xcode 3.2 and Xcode 4.0.2 on the same machine, which uses Hudson for automated CI (continuous integration) builds. When I say that both were installed, what I mean by that is that I can use both Xcode 3 and Xcode 4 simultaneously or interchangeably. They both exist on the machine, as I did a custom install for Xcode 4 without overwriting Xcode 3 (supposedly).
- Do command line calls to 'xcodebuild' invoke Xcode 3 or Xcode 4?
- Does that question even make sense? Someone who may or may not be knowledgable on the topic is requesting that some projects be built with 3 and some with 4.
- If so, how do I force it to use 3 or 4?
- alternatively, is there a separate location where Xcode 3's 'xcodebuild' is stored vs. where Xcode4's 'xcodebuild' is stored? If there is, I can just use a different path in my build script.
You can find out what version is xcodebuild using with xcode-select -print-path. Also, change to a different version using xcode-select -switch <path>
Also, to determine which XCode environment is being used, use the command xcodebuild -version.
Outside the terminal, you can view and change this in Xcode.
Open Preferences, then select the Locations tab. Near the bottom, an entry titled Command Line Tools labels a dropdown, whose selection corresponds to the version of Xcode used in xcodebuild.
You may open this dropdown to select another version of Xcode that you have installed in your /Applications folder.
来源：https://stackoverflow.com/questions/7016307/which-version-of-xcode-does-xcodebuild-use