COMP: Reworked ITKFFT_SRCS for FFTW and cuFFTW use

Added itkFFTWFFTImageFilterInitFactory.cxx to ITKFFT_SRCS for all FFTW builds
Added itkFFTWGlobalConfiguration.cxx to ITKFFT_SRCS for FFTW but NOT cuFFTW

Author: darrent1974

Modules/Filtering/FFT/src/CMakeLists.txt

@@ -1,17 +1,18 @@
 set(ITKFFT_SRCS
-itkComplexToComplexFFTImageFilter.cxx
-itkVnlFFTImageFilterInitFactory.cxx
-itkFFTWFFTImageFilterInitFactory.cxx)
+  itkComplexToComplexFFTImageFilter.cxx
+  itkVnlFFTImageFilterInitFactory.cxx)
 
-if(ITK_USE_FFTWF OR ITK_USE_FFTWD AND NOT ITK_USE_CUFFTW)
-  list(APPEND ITKFFT_SRCS itkFFTWGlobalConfiguration.cxx)
+if(ITK_USE_FFTWF OR ITK_USE_FFTWD)
+  list(APPEND ITKFFT_SRCS itkFFTWFFTImageFilterInitFactory.cxx)
+  if(NOT ITK_USE_CUFFTW)
+    list(APPEND ITKFFT_SRCS itkFFTWGlobalConfiguration.cxx)
+  endif()
 endif()
 
 itk_module_add_library(ITKFFT ${ITKFFT_SRCS})
 
 # this library is only needed if FFTW is used
 if(ITK_USE_FFTWF OR ITK_USE_FFTWD AND NOT ITK_USE_CUFFTW)
-
   if(ITK_USE_FFTWD)
     if(NOT ITK_USE_SYSTEM_FFTW)
       add_dependencies(ITKFFT fftwd) # Ensure that local FFTW is built before using