Xcode 4.1 fatal error: stdlib modified since the precompiled header was built

Question

Building an iPhone app, using:

• Xcode 4.1
• Base SDK iOS 4.3
• Apple LLVM Compiler 2.1

I have started getting the following error

Answer 1

I tried above all but no use. Finally I deleted Xcode and re installed again. Now it is working fine..

Xcode->delete->install again

It might help some one...