IOS / Mac OS X Link Problems involving symbols such as __ZTVN10__cxxabiv121__vmi_class_type_infoE

If linking produces undefined symbols involving the following:

• __ZTVN10__cxxabiv121__vmi_class_type_infoE
• __Znwm
• __ZdlPv
• ___gxx_personality_sj0
• ___cxa_begin_catch
• __ZTVN10__cxxabiv120__si_class_type_infoE
• ___cxa_end_catch
• __ZdaPv
• __ZTVN10__cxxabiv117__class_type_infoE
• etc.

It means you’re NOT linking with the C++ runtime libs.  To link with the C++ runtime libs, include an empty source file having a file extension of “.cpp”.   For more information, see the IOS Objective-C linking notes