message: COMP: missing condition for RTKHeaderTest
diff: #ifndef rtkCudaConjugateGradientImageFilter_hxx
  #define rtkCudaConjugateGradientImageFilter_hxx
  +#include "rtkConfiguration.h"
  +//Conditional definition of the class to pass ITKHeaderTest
  +#ifdef RTK_USE_CUDA
  +
  #include "rtkCudaConjugateGradientImageFilter.h"
  #include "rtkCudaConjugateGradientImageFilter.hcu"
  #include "rtkCudaConstantVolumeSource.h"
  @@ -112,3 +116,4 @@ CudaConjugateGradientImageFilter<TImage>
  } // namespace rtk
  #endif
  +#endif
  