Xcode 3.2.6 and 4 linker errors ld:bad codegen, pointer diff in … to global weak symbol

Question

I have very strange errors with Xcode 3.2.6 and Xcode 4.

Xcode 3.2.5 does not have the errors in my project.

Symbol hidden by defaults option is set to YES.<

Answer 1

There is an answer here : "bad codegen, pointer diff" linker error with Xcode 4