[petsc-dev] Can ViennaCL coexist with Cusp?

[Jose E. Roman]

It seems ViennaCL and Cusp are exclusive. From vecimpl.h:

#if defined(PETSC_HAVE_CUSP)
  PetscCUSPFlag          valid_GPU_array;    /* indicates where the most 
recently modified vector data is (GPU or CPU) */
  void                   *spptr; /* if we're using CUSP, then this is the 
special pointer to the array on the GPU */
#endif
#if defined(PETSC_HAVE_VIENNACL)
  PetscViennaCLFlag      valid_GPU_array;    /* indicates where the most 
recently modified vector data is (GPU or CPU) */
  void                   *spptr; /* if we're using ViennaCL, then this is the 
special pointer to the array on the GPU */
#endif


So I guess configure should complain when both are enabled at configure time, 
otherwise the build fails.

Jose