How do I change the build's SDK version in Xcode?

I'm using Xcode 2.5 on Mac 10.4.11 PPC. javac -version 开发者_如何学Goreturns 1.5.x yet when I imported my source code and tried to build it in Xcode, I get errors all over because generics, annotations, and for-each loops are not supported in -source 1.3.

I thought I found the setting to change the source version in Xcode in the above but it doesn't work. Any ideas?

Actually I went through the build.xml file of the Xcode project and found the source and target fields and just changed em from 1.3 and 1.2 respectively to 1.5.

Google turned this up: But it does seem very old