symbol referencing error

   first referenced
 symbol                              in file
---------                        ----------------
_EVMDM642_EDMA_AIC23_init        C:\\CCStudio_v3.3\\MyProjects\\audioproject\\build\\Configuration1cfg.obj
_EVMDM642_EDMA_AIC23_FXNS        C:\\CCStudio_v3.3\\MyProjects\\audioproject\\build\\Configuration1cfg.obj
>>   error: symbol referencing errors -
            'C:/CCStudio_v3.3/MyProjects/audioproject/bin/evmdm642_echo.out'
            not built

>> Compilation failure

Build Complete,
  2 Errors, 1 Warnings, 0 Remarks.

please anyone suggest the solution for the above problem.

can math.h support real() if not how to find the real of the complex number in ccstudio

regards

sachin