为什么gcov不报告我的单元测试包含的任何行?

I am using Xcode 3.2 on 10.6, with the shipped version of gcov and default GCC compiler (both version 4.2.1). I have created a dependent Cocoa unit test bundle which is injected into my app, and followed Apple's documentation on I am using Xcode 3.2 on 10.6, with the shipped