Compile errors about cusp-library HOT 4 CLOSED

Hi Matt,

I've never seen this sort of error before.  Could it be that you're using 
Thrust within some extern "C" {} block?  The lines of code referenced by the 
compiler errors look pretty innocuous:
http://code.google.com/p/thrust/source/browse/thrust/detail/device/cuda/detail/b
40c/vector_types.h#37

Is there a smaller, self-contained example that reproduces the error?

I think I found the culprit.  The #define of VecType in one of the PETSc 
headers [1] conflicts with the one in Thrust's radix sort.

Is it possible to #undef VecType at the end of this header?  If not, I suppose 
we could rename the one in Thrust. FWIW adding #undef VecType here [2] seems to 
work.

[1] 
http://petsc.cs.iit.edu/petsc/petsc-dev/file/e8bf41a37f92/include/petscvec.h#l98
[2] 
http://petsc.cs.iit.edu/petsc/petsc-dev/file/e8bf41a37f92/src/mat/impls/aij/seq/
seqcuda/aijcuda.cu#l16

Okay, that takes care of that problem, which exposes another one for me. I just 
copied over the arch.h/.inl from thrust/experimental to cusp/detail/device, 
which now seems to be blowing up on me. What should I be using for these files?

  Thanks,

     Matt

r80c0df6fbb adds the missing arch files