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C28x FFT library in CC v 4.1.0

I am new to the Ti tools so this may be simple.  I want to include the C28x FFT library in my project.  when I import the library I get the following error:

----------------------------------------------------------------------------------------

 undefined first referenced             

>> Compilation failure
  symbol       in file                  
 --------- ----------------             
 _c_int00  ./DSP2833x_CodeStartBranch.obj

error: unresolved symbols remain

----------------------------------------------------------------------------------------

If I remove the declaration of the RFFT32 variable from my code  the error goes away

so removing this line removes the need for the fft library so I'm assuming it is not imported and the error goes away.

RFFT32  fft=RFFT32_1024P_DEFAULTS;  

 

I am using the Example_2833xAdcSOC project as my base.

I had to remove floating point library support and change my linker .cmd file to get this far so maybe it is something I changed?

thanks