It looks like the problem had to do with the Architecture settings on my sub projects. Xcode 4.2 changes the default Architecture to just armv7 instead of both armv6 and armv7. I had updated my main project to armv6 and armv7, but the sub-projects were still only using armv7.
Once I updated all of the sub-projects then it started linking properly.
That error note doesn't really tell anything, it's too generic. Try to find something more, for example in Mac OS X console output.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.