Not able to build for iPhone 6

[niksdgr8]

My code works fine when I run on simulator with iPhone5 and iPad2 but gives the following error on iPhone 6 and above:
Undefined symbols for architecture i386: "_OBJC_CLASS_$__TtC6Charts12BarChartData", referenced from: objc-class-ref in SMWBarChartsViewController.o objc-class-ref in SMWBarGraphViewController.o "_OBJC_CLASS_$__TtC6Charts12PieChartData", referenced from: objc-class-ref in SMWPieChartsViewController.o "_OBJC_CLASS_$__TtC6Charts15BarChartDataSet", referenced from: objc-class-ref in SMWBarChartsViewController.o objc-class-ref in SMWBarGraphViewController.o "_OBJC_CLASS_$__TtC6Charts15PieChartDataSet", referenced from: objc-class-ref in SMWPieChartsViewController.o "_OBJC_CLASS_$__TtC6Charts17BarChartDataEntry", referenced from: objc-class-ref in SMWBarChartsViewController.o objc-class-ref in SMWPieChartsViewController.o objc-class-ref in SMWBarGraphViewController.o ld: symbol(s) not found for architecture i386 clang: error: linker command failed with exit code 1 (use -v to see invocation)

[liuxuan30]

please google or ask on stack overflow for such issues
some key words:
Undefined symbols for architecture i386
ld: symbol(s) not found for architecture i386 clang:

check your build phases, compiled resources for missing files, and check your framework is correctly embedded