Strange Error while building with XCODE an old project
===

These are someerrors that I get while building my project:

first 

    Command /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/usr/bin/llvm-gcc-4.2 failed with exit code 1



    Command (null): error: unable to open executable .../


    LLVM GCC 4.2 ERROR

    Apple Mach-O Linker (Id) Error

