Undefined symbols for architecture i386:Cannot fix this error please give some solution-Collection of common programming errors

Undefined symbols for architecture i386: “DisplayLangStr(NSString*)”, referenced from: -[DecimalPointButton init] in NumberKeypadDecimalPoint.o -[AboutViewController initWithTabBar] in AboutViewController.o -[AboutViewController tableView:cellForRowAtIndexPath:] in AboutViewController.o -[AboutViewController tableView:viewForHeaderInSection:] in AboutViewController.o -[AboutViewController tableView:didSelectRowAtIndexPath:] in AboutViewController.o -[AboutViewController launchMailAppOnDevice:emailBody:] in AboutViewController.o -[AboutViewController displayComposerSheet:emailBody:] in AboutViewController.o … “DisplayLocaleError(NSString*)”, referenced from: -[TransportLayer connection:didFailWithError:] in TransportLayer.o -[PaymentViewController onProceedButtonPressed:] in PaymentViewController.o ld: symbol(s) not found for architecture i386 clang: error: linker command failed with exit code 1 (use -v to see invocation)

Originally posted 2013-11-27 12:26:03.